Boiler and Pressure Vessel Inspection_USA

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RULES AND REGULATIONS

FOR

BOILER AND PRESSURE VESSEL INSPECTION

( R. I . G. L. - 28- 25)

Revi sed J ul y 2011

RI Department of Labor & Training

Division of Occupational Safety

Boiler Inspection Unit1511 Pontiac AvenueP.O. Box 20157

Cranston, RI 02920-0942Office#:(401)462-8577

Fax#:(401)462-8576



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TABLE OF CONTENTS

PART I - DEFINITION OF TERMS . . . . . . . . . . . . . . . . . . . Pg 3

PART I I - ADMINISTRATION: l . Mi ni mum Const r uct i on St andar ds f or Boi l er s & Pr essur e Vessel s . Pg 92. Frequency of I nspect i ons of Boi l er s and Pr essur e Vessel s. . . . Pg 103. Not i f i cat i on of I nspect i on. . . . . . . . . . . . . . . . . . . Pg 114. Exami nat i on For An I nspect or ' s Cer t i f i cat e of Compet ency. . . . Pg 115. Exami nat i on Fees. . . . . . . . . . . . . . . . . . . . . . . . Pg l 26. Cer t i f i cat e of Compet ency and I dent i f i cat i on Car d. . . . . . . Pg l 27. Conf l i ct of I nt er est . . . . . . . . . . . . . . . . . . . . . . Pg l 38. I nspect i on Repor t s To Be Submi t t ed by I nspect or s. . . . . . . . Pg l 39. I nsurance Compani es To Not i f y Chi ef I nspect or of New, Cancel l ed

Or Suspended I nsur ance On Boi l er s Or Pressur e Vessel s . . . . . Pg l 4l 0. Aut hor i zed I nspect or s To Not i f y Chi ef I nspect or Of Unsaf e

Boi l er s Or Pressure Vessel s . . . . . . . . . . . . . . . . . . Pg l 4l l . Owner - User I nspect i on Agency. . . . . . . . . . . . . . . . . . Pg l 5l 2. Def ect i ve Condi t i ons Di scl osed At Ti me of Exter nal I nspect i on . Pg l 6l 3. Owner Or User To Not i f y Chi ef I nspect or Of Acci dent . . . . . . Pg l 6

l 4. I nspect i on Cert i f i cat e And I nspect i on Fees. . . . . . . . . . . Pg l 6l 5. Val i di ty Of I nspect i on Cer t i f i cate. . . . . . . . . . . . . . . Pg 19l 6. Re- st ampi ng Boi l er s and Pr essur e Vessel s . . . . . . . . . . . Pg 19l 7. Penal t y For Oper at i on Of Unsaf e Boi l er s Or Pr essur e Vessel s . . Pg 20l 8. Condemned Boi l er s And Pr essur e Boi l er s. . . . . . . . . . . . . Pg 20l 9. Rei nstal l at i on Of Boi l ers Or Pressure Vessel s . . . . . . . . . Pg 2020. I nst al l at i on, Oper at i on, Sal e Or Of f er i ng For Sal e Of Non-

St andard Boi l ers Or Pressure Vessel s. . . . . . . . . . . . . . Pg 2021. I nst al l at i on Of Used Or Second- Hand Boi l er s Or Pressur e Vessel s Pg 2022. Rei nstal l ed Boi l er s Or Pressure Vessel s . . . . . . . . . . . . Pg 2123. Worki ng Pressure For Exi sti ng I nstal l at i ons . . . . . . . . . . Pg 2124. Repai r s and Al t er at i ons To Boi l er s & Pr essur e Vessel s . . . . . Pg 2125. Repai rs To Pressure Rel i ef Val ves . . . . . . . . . . . . . . . Pg 2126. Ri vet ed Pat ches . . . . . . . . . . . . . . . . . . . . . . . . Pg 2227. Requi rement s For New I nstal l at i ons . . . . . . . . . . . . . . Pg 2228. Appl i cat i on Of St at e Seri al Numbers . . . . . . . . . . . . . . Pg 2329. Var i at i ons. . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 2330. Penal t i es . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 24

PART I I I - EXISTING INSTALLATION: SECTION I - POWER BOILERS EBO- l - Age Li mi t Of Exi s t i ng Boi l ers . . . . . . . . . . . . . . . Pg 24EBO- 2 - Maxi mum Al l owabl e Worki ng Pressur e For St andard Boi l ers . . Pg 25EBO- 3 - Maxi mum Al l owabl e Worki ng Pressur e For Nonst andard Boi l ers. Pg 25EBO- 4 - Cast I r on Header s And Mud Dr ums . . . . . . . . . . . . . . Pg 26EBO- 5 - Pressure On Cast I r on Boi l er s . . . . . . . . . . . . . . . Pg 26EBO- 6 - Saf et y Val ves . . . . . . . . . . . . . . . . . . . . . . . Pg 26EBO- 7 - Boi l er Feedi ng . . . . . . . . . . . . . . . . . . . . . . Pg 28

EBO- 8 - Water Level I ndi cat ors . . . . . . . . . . . . . . . . . . . Pg 29EBO- 9 - Water Col umns . . . . . . . . . . . . . . . . . . . . . . . Pg 30EBO- l 0- Gage Gl ass Connect i ons. . . . . . . . . . . . . . . . . . . Pg 31EBO- l l - Pressure Gages . . . . . . . . . . . . . . . . . . . . . . . Pg 32EBO- l 2- St op Val ves . . . . . . . . . . . . . . . . . . . . . . . . Pg 33EBO- l 3- Bl ow- of f Pi pi ng. . . . . . . . . . . . . . . . . . . . . . Pg 33EBO- l 4- Repai r s And Renewal s Of Boi l er Fi t t i ngs And Appl i ances. . . Pg 34EBO- l 5- Condi t i ons Not Covered By These Requi r ement s. . . . . . . . Pg 34



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TABLE OF CONTENTS

PART I I I - EXISTING INSTALLATION: SECTION II - HEATING BOILERS EHB- l - St andar d Boi l er s . . . . . . . . . . . . . . . . . . . . . Pg 35EHB- 2 - Nonstandard Ri vet ed Boi l ers. . . . . . . . . . . . . . . . Pg 35EHB- 3 - Nonstandard Wel ded Boi l ers . . . . . . . . . . . . . . . . Pg 35EHB- 4 - Nonstandard Cast I r on Boi l er s . . . . . . . . . . . . . . Pg 35EHB- 5 - Port abl e Wat er Heat ers . . . . . . . . . . . . . . . . . . Pg 35EHB- 6 - Saf et y Val ves. . . . . . . . . . . . . . . . . . . . . . . Pg 35EHB- 6 – Tabl e . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg 36EHB- 7 - Saf et y Rel i ef Val ve Requi r ement s For Hot Wat er Heat i ng And

Hot Water Suppl y Boi l ers . . . . . . . . . . . . . . . . . Pg 37EHB- 8 - St eamGages. . . . . . . . . . . . . . . . . . . . . . . . Pg 38EHB- 9 - Pressur e Or Al t i t ude Gages And Ther momet er s. . . . . . . . Pg 39EHB- l 0- Wat er Gage Gl asses . . . . . . . . . . . . . . . . . . . . Pg 39EHB- l l - St op Val ves. . . . . . . . . . . . . . . . . . . . . . . . Pg 40EHB- l 2- Feed- wat er Connect i ons. . . . . . . . . . . . . . . . . . Pg 41

EHB- l 3- Wat er Col umn And Water Level Cont r ol Pi pes . . . . . . . . Pg 42EHB- l 4- Return Pump. . . . . . . . . . . . . . . . . . . . . . . . Pg 42EHB- l 5- Repai r s And Renewal s Of Fi t t i ngs And Appl i ances. . . . . . Pg 42

PART I I I - EXISTING INSTALLATION: SECTION III - PRESSURE VESSELS EPV- l - Maxi mum Al l owabl e Worki ng Pressur e For St andard Pressur e

Vessel s. . . . . . . . . . . . . . . . . . . . . . . . . . Pg 42EPV- 2 - Maxi mumAl l owabl e Worki ng Pressure For Nonst andar d Pressure

Vessel s, Except as Pr ovi ded i n EPV- 3 . . . . . . . . . . . Pg 42EPV- 3 - Nonst andard Pressur e Vessel s - Use Of Ot her Formul as . . . Pg 44EPV- 4 - I nspect i on of I naccessi bl e Part s . . . . . . . . . . . . . Pg 44EPV- 5 - Overpressure Protect i on. . . . . . . . . . . . . . . . . . Pg 44EPV- 6 - Repai r s And Renewal s Of Fi t t i ngs And Appl i ances. . . . . . Pg 44

PART I V - GENERAL REQUIREMENTS:GR- l - I nspecti on Of Boi l er s And Pr essur e Vessel s . . . . . . . . Pg 45GR- 2 - Preparat i on For I nspect i on . . . . . . . . . . . . . . . . Pg 45GR- 3 - Boi l ers And Pressur e Vessel s I mpr operl y Prepared For

I nspect i on . . . . . . . . . . . . . . . . . . . . . . . . Pg 46GR- 4 - Removal Of Cover i ng t o Per mi t I nspect i on . . . . . . . . . Pg 46GR- 5 - Lap Seam Crack . . . . . . . . . . . . . . . . . . . . . . Pg 46GR- 6 - Pr essur e Test . . . . . . . . . . . . . . . . . . . . . . Pg 46GR- 7 - Automat i c Low Wat er Fuel Cut of f And/ Or Wat er Feedi ng Devi ce Pg 47GR- 8 - Pressure Reduci ng Val ves . . . . . . . . . . . . . . . . . Pg 47GR- 9 - Boi l er Bl ow- of f Equi pment . . . . . . . . . . . . . . . . Pg 48GR- l 0 - Locat i on Of Di schar ge Pi pi ng Out l et s . . . . . . . . . . . Pg 48GR- l l - Suppor t s . . . . . . . . . . . . . . . . . . . . . . . . . Pg 48

GR- l 2 - Boi l er Door Latches . . . . . . . . . . . . . . . . . . . Pg 48GR- l 3 - Cl ear ance. . . . . . . . . . . . . . . . . . . . . . . . . Pg 49GR- l 4 - Ladders and Runways . . . . . . . . . . . . . . . . . . . Pg 49GR- l 5 - Exi t From Boi l er Room. . . . . . . . . . . . . . . . . . . Pg 49GR- l 6 - Suggest i ons For Operat i ons . . . . . . . . . . . . . . . . Pg 49GR- l 7 - Ai r And Vent i l at i on Requi r ement s - Combust i on Ai r Suppl y &

Vent i l at i on Of Boi l er Room. . . . . . . . . . . . . . . . Pg 49GR- l 8 - Gas Bur ner s. . . . . . . . . . . . . . . . . . . . . . . . Pg 50GR- l 9 - Condi t i ons Not Covered By These Rul es And Regul at i ons. . . Pg 50



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FOREWORD

To prot ect t he publ i c agai nst boi l er and pressure vesselexpl osi ons, i t i s essent i al t hat compr ehensi ve admi ni st r at i ver ul es and r egul at i ons are approved by t he Code Commi ss i on f orOccupat i onal Saf ety & Heal t h under t he aut hor i t y of Chapt er28- 25 of t he General Laws of Rhode I sl and.

These r ecommended Admi ni st r at i ve Boi l er and Pr essureVessel Saf ety Rul es and Regul at i ons ar e i nt ended t o serve t hatpur pose.

On J anuar y 5, 1989, t he Code Commi ss i on appr oved t he Rul esand Regul at i ons recommended by t he Advi sor y Panel . These Rul esshal l t ake ef f ect on Febr uar y 1, 1989.

INTRODUCTION

To promot e uni f or m enf or cement of boi l er and pressurevessel l aws, t hese r ul es and r egul at i ons ar e pr epar ed t oassi st t he Admi ni st r at or , t he Chi ef I nspect or and I nspect or si n t he i mpl ement at i on, admi ni st r at i on and i nt er pr et at i on of t he boi l er and pr essur e vessel s saf et y act f or t he St at e of Rhode I sl and.

The pur pose of t he act i s t o promot e saf et y i n t heappl i cat i ons of boi l er s or pr essur e vessel s by pr ovi di ngsui t abl e r equi r ement s f or const r ucti on, i nst al l at i on,i nspect i on, mai nt enance, r epai r , al t er at i on, oper at i on,modi f i cat i on and r epl acement . I t i s t he i nt ent t o pr ovi de suchsaf et y wi t h t he l east possi bl e bur den upon t he i ndust r i esi nvol ved. I t i s not pr esumed t o l i mi t i n any way t hedesi gner ' s or t he manuf act ur er' s r i ght t o choose any desi gn ormethod of const r uct i on t hat conf orms t o the r equi r ement s of t heAmeri can Soci ety of Mechani cal Engi neer s ( ASME) Boi l er andPressure Vessel Code. I n some i nst ances, due t o a val i di mpedi ment t o f ul l ASME Code compl i ance, a boi l er or pressur evessel cannot be const r uct ed t o t hat Code. Provi si on i s madef or t he owner or user t o appl y t o t he Chi ef I nspect or f orper mi ssi on t o use such boi l er or pr essur e vessel wi t hi n t he

j ur i sdi ct i on.

When a boi l er and pr essur e vessel i nspect i on l aw i senact ed i n a j ur i sdi ct i on, t he enf orcement aut hori t y may be

conf r ont ed wi t h t he pr obl em of so admi ni st er i ng t he l aw and t her ul es and regul at i ons t hat t hey wi l l not creat e undue har dshi p,par t i cul ar l y i n l ocal i t i es wher e numer ous smal l i nst al l at i onsare encount er ed. I t i s t he pur pose of any boi l er and pr essurevessel i nspect i on l aw and t he r ul es and r egul at i ons based



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t her eon t o pr ovi de f or and mai nt ai n saf e operat i ng condi t i ons,but i s def i ni t el y not t he i nt ent t hat t hey shoul d pr event t heoperat i on of any equi pment t hat can be shown t o be r easonabl ysaf e. Wi t h t hese consi der at i ons i n vi ew, t he f ol l owi ng r ul esf or exi st i ng i nst al l at i ons ar e pr esent ed t o f or m t he basi sof an ef f i ci ent , uni f or m and wor kabl e saf et y di vi si on.

Provi si on i s al so made f or any per son who bel i eves anyr ul e or r egul at i on pr omul gated by t he Code Commi ssi on i sunr easonabl e, or t hat i t i mposes an undue bur den upon t heowner or user , t o appl y t o t he Admi ni st r at or f or a var i at i onf r om such r ul e or r egul at i on.



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PART I

DEFINITION OF TERMS

l . ACT - The Boi l er and Pressur e Vessel Saf ety Act whi ch wasenact ed as Chapter 28- 25, Act s of t he General Assembl y.

2. ADMINISTRATOR - The Admi ni st r at or of t he Di vi si on of Occupat i onal Saf ety i s appoi nt ed by t he Di r ect or of Labor

and i s r esponsi bl e f or i mpl ement at i on and enf orcement of al lpr ovi si ons under Chapt er 28- 20.

3. ALTERATION - A change i n any i t em descr i bed on t he ori gi nalManuf act ur er ' s Data Report whi ch af f ect s the pr essurecapabi l i t y of the boi l er or pr essur e vessel . Non- physi calchanges such as an i ncrease i n t he maxi mumal l owabl e worki ng

pr essur e ( i nt er nal or exter nal ) or desi gn t emper at ur e of aboi l er or pr essur e vessel shal l be consi der ed an al t er at i on.A reduct i on i n mi ni mum t emperatur e such that addi t i onalmechani cal t est s ar e r equi r ed shal l al so be consi der ed anal t erati on.

4. API-ASME CODE - The Amer i can Pet r ol eum I nst i t ut e ( API ) i nconj unct i on wi t h t he ASME Code as used i n t hese r ul es andr egul at i ons shal l mean t he Code f or unf i r ed pr essur e vessel sf or pet r ol eum l i qui ds and gases.

5. APPROVED - Appr oved by the Code Commi ss i on f or Occupat i onalSaf ety and Heal t h.

6. ASME - The Amer i can Soci et y of Mechani cal Engi neers ( ASME) ,345 E. 47t h St r eet , New Yor k, New Yor k l 00l 7.

7. AUTHORIZED INSPECTION AGENCY - One of t he f ol l owi ng:

( a) a depar t ment or di vi si on est abl i shed by a j ur i sdi ct i on whi ch has adopt ed and does admi ni st erone or mor e sect i ons of t he ASME Code, one of whi chshal l be Sect i on I as a l egal r equi r ement , and whosei nspect ors hol d val i d commi ssi ons i ssued by TheNat i onal Boar d of Boi l er and Pressur e VesselI nspect or s;

( b) an i nsur ance company whi ch has been l i censed orr egi st er ed by the appr opr i at e aut hori t y of a St at e of t he Uni t ed St ates or a Provi nce of Canada t o wr i t eand does wr i t e boi l er and pr essur e vessel i nsur anceand t o provi de i nspect i on ser vi ce of boi l er s andpr essure vessel s i n such St at e or Provi nce.



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8. BOILER - A cl osed vessel i n whi ch wat er or ot her l i qui d i sheat ed, st eam or vapor i s gener at ed, st eam or vapor i ssuperheated, or any combi nat i on t hereof , under pr essur e orvacuum, f or use external t o i t sel f , by t he di r ectappl i cat i on of ener gy f r om combust i on of f uel s, el ectr i ci t yor sol ar ener gy. The t er m boi l er i ncl udes f i r ed uni t s f orheat i ng or vapori zi ng l i qui ds other t han wat er where t heseuni t s are separat e f r om pr ocessi ng syst ems and compl etewi t hi n t hemsel ves. The t er m boi l er al so shal l i ncl ude t heappar atus used by whi ch heat i s generated and al l cont r ol sand saf ety devi ces associ ated wi t h such apparatus or t hecl osed vessel s.

( a) Power Boi l er - A boi l er i n whi ch st eam or othervapor i s generat ed at a pr essur e of more t han l 5psi .

( b) Hi gh Pr essur e, Hi gh- Temper at ur e Boi l er - A boi l eri n whi ch wat er , oi l , or ot her f l ui d i s heat ed andi nt ended f or oper at i on at pr essur es i n excess of l 60psi and/ or t em perat ur es i n excess of 250 degr ees

Fahr enhei t .

( c) Heating Boiler - A st eam or vapor boi l er oper at i ngat a pr essure not exceedi ng l 5 psi st eampr essure ora hot wat er boi l er i n whi ch wat er or ot her f l ui d i sheat ed and i ntended f or operat i on at pressur es notexceedi ng l 60 psi or t emper at ures not exceedi ng 250degr ees Fahr enhei t .

( d) Electric Boiler - A power boi l er or heat i ng boi l eri n whi ch t he sour ce of heat i s el ect r i ci t y.

( e) Miniature Boiler - A power boi l er orhi gh- t emperatur e water boi l er whi ch does not exceedt he f ol l owi ng l i mi t s:

1. 16" i nsi de di amet er of shel l ;

2. 20 sq. f t . heat i ng sur f ace ( not appl i cabl e t oel ect r i c boi l ers ) ;

3. 5 cu. f t . gr oss vol ume excl usi ve of casi ng andi nsul at i on.

4. l 00 psi maxi mum al l owabl e worki ng pr essur e.



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( f ) Unfired Power Boiler - An unf i r ed st eam or ot hervapor gener at i ng system usi ng heat f r om t heoper at i on of a pr ocessi ng system or ot her i ndi r ectheat sour ce.

( g) Hot Water Supply Boiler - A boi l er compl et el y f i l l edwi t h wat er used f or st orage and/ or suppl y of hotwat er t o be used external l y t o i t sel f at pr essur esnot exceedi ng l 60 psi or at t emperatures notexceedi ng 250 degrees Fahr enhei t at or near t heboi l er out l et .

( h) Portable Boiler - A boi l er whi ch i s pr i mar i l yi nt ended f or t emporar y l ocat i on and t he const r uct i onand usage permi t s i t t o be r eadi l y moved f r om onel ocat i on t o another .

9. CERTIFICATE OF COMPETENCY - A cer t i f i cat e i ssued t o a per sonwho has passed t he exami nat i on prescr i bed by t heAdmi ni st r at or - See 28- 25- 4.

10. CERTIFICATE OF INSPECTION - A cer t i f i cat e i ssued by t heAdmi ni st r at or f or t he oper at i on of a boi l er , pr essur evessel or nucl ear syst emas r equi r ed by t he Act .

11. CERTIFICATE INSPECTION - An i nspect i on , t he r epor t of whi ch i s used by t he Admi ni st r at or as j ust i f i cat i on f ori ssui ng, wi t hhol di ng or r evoki ng t he i nspect i oncer t i f i cat e. Thi s cert i f i cat e i nspecti on shal l be ani nt er nal i nspect i on when r equi r ed; ot her wi se, i t shal l beas compl et e an i nspect i on as possi bl e.

. ( a) I NTERNAL I NSPECTI ON - As compl et e an exami nat i on ascan r easonabl y be made of t he i nternal and ext ernalsur f aces of a boi l er or pressur e vessel whi l e i t i sshut down and manhol e pl ates, handhol e pl ates orother i nspect i on openi ng cl osur es are r emoved asr equi r ed by t he i nspect or.

( b) EXTERNAL I NSPECTI ON - An i nspect i on made when aboi l er or pr essur e vessel i s i n oper at i on, i f possi bl e.

12. CHIEF INSPECTOR - The Chi ef Boi l er and Pressure VesselI nspect or i n t he Di vi si on of Occupat i onal Saf et y i sappoi nt ed by t he Di r ect or of Labor and i s char ged t oadmi ni st er and i mpl ement t he pr ovi si ons of t hi s Chapt er .

The Chi ef I nspect or i s r esponsi bl e t o t he Admi ni st r at or of Occupat i onal Saf ety as out l i ned i n t he Rhode I sl and General

Laws, Sect i on 28- 25- 3.



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13. COMMISSION-NATIONAL BOARD - The commi ss i on i ssued by TheNat i onal Boar d of Boi l er and Pr essur e Vessel I nspect or s t o ahol der of a cert i f i cate of competency who desi r es t o makeshop i nspect i ons or f i el d i nspect i ons i n accor dance wi t h t heNat i onal Board Byl aws and whose empl oyer submi t s t hei nspect or ' s appl i cat i on t o t he Nat i onal Boar d f or suchcommi ss i on.

14. CODE COMMISSION - State of Rhode I sl and Code Commi ssi on onOccupat i onal Saf ety and Heal t h.

15. CONDEMNED BOILER, PRESSURE VESSEL - A boi l er or pr essur evessel t hat has been i nspect ed and decl ared unsaf e, ordi squal i f i ed by l egal r equi r ement s, by an i nspect or and ast ampi ng or marki ng desi gnat i ng i t s condemnat i on has beenappl i ed by t he Chi ef or Aut hor i zed I nspect or .

16. DIRECTOR - The Di r ect or of Labor or hi s dul y aut hori zedr epr esent at i ve.

17. DIVISION - Di vi si on of Occupat i onal Saf et y wi t hi n t he St at eDepar t ment of Labor .

18. EXISTING INSTALLA TI ON - I ncl udes any boi l er or pressurevessel const r uct ed, i nst al l ed, pl aced i n oper at i on, orcont r act ed f or bef or e J ul y 1, 1985.

19. INSPECTOR - The Chi ef I nspect or, or any Aut hori zedI nspect or, or Owner - User I nspect or.

( a) CHI EF I NSPECTOR - The Chi ef Boi l er and Pressur eVessel I nspector appoi nted under t he Act .

( b) AUTHORI ZED I NSPECTOR - An I nspect or empl oyed by t heSt at e of Rhode I sl and or an Aut hori zed I nsur anceCompany hol di ng a Rhode I sl and Cert i f i cate of Compet ency, and who i s r egul ar l y empl oyed by t heSt ate or an I nsurance Company aut hor i zed t o i nsur eagai nst l oss f r om expl osi on of boi l er s or pr essur evessel s i n t hi s St at e.

( c) OWNER- USER I NSPECTOR - An I nspect or who hol ds aval i d Nat i onal Board Owner - User Commi ss i on who haspassed t he exami nat i on pr escr i bed by t heAdmi ni st r ator and who i s cont i nuousl y empl oyed asan i nspect or by an owner- user i nspect i on agency.





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t o t he i ncr ease i n pr essure over openi ng pr essure. I t maybe pr ovi ded wi t h an encl osed spri ng housi ng sui t abl e f orcl osed di schar ge system appl i cat i on and i s pr i mar i l y usedf or l i qui d servi ce.

32. REPAIR - BOILER OR PRESSURE VESSEL - The work necessary t or est or e a boi l er or pr essur e vessel t o a saf e andsat i sf act or y condi t i on, pr ovi ded t her e i s no devi at i on f r omt he or i gi nal desi gn.

33. REPAIR - PRESSURE RELIEF VALVE - The r epl acement ,r e- machi ni ng or cl eani ng of any cri t i cal par t , l appi ng of seat and di sk or any other operat i on whi ch may af f ect t hef l ow passage, capaci t y f unct i on or pr essur e r et ai ni ngabi l i t y of t he val ve. Di sassembl y, r eassembl y and/ oradj ust ment s whi ch af f ect t he pr essur e r el i ef val ve f unct i onar e al so consi der ed a r epai r .

34. SAFETY RELIEF VALV E - A pr essur e r el i ef val ve char act er i zedby rapi d openi ng or pop act i on, or by openi ng i n pr oport i on

t o t he i ncr ease i n pr essure over openi ng pr essure,dependi ng on appl i cat i on.

35. SAFETY VALVE - A pr essur e r el i ef val ve act uat ed by i nl etst at i c pr essure and char act er i zed by r api d openi ng or popact i on.

36. SECOND-HAND BOILER OR PRESSURE VESSEL - A boi l er orpr essur e vessel whi ch has changed bot h l ocat i on andowner shi p si nce pr i mary use.

37. STANDARD BOILER OR PRESSURE VESSEL - A boi l er or pr essur evessel whi ch bears t he st amp of t hi s St ate, t he ASME st amp,t he API - ASME st amp, both t he ASME and Nat i onal Board st amp,or t he st amp of another j ur i sdi ct i on whi ch has adopt ed ast andar d of const r uct i on equi val ent t o t hat r equi r ed by t heBoard.

38. WATER HEATER - A cl osed vessel used excl usi vel y t o suppl ypot abl e water whi ch i s heat ed by t he combust i on of f uel s,el ect r i ci t y or any other sour ce and wi t hdr awn f or useext er nal t o t he syst emat pr essures not exceedi ng l 60 psiand shal l i ncl ude al l cont r ol s and devi ces necessar y t opr event water t emperat ur es f r om exceedi ng 2l 0 degr eesFahrenhei t as wel l as st orage vessel connect ed t o t he waterheat er.



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PART II

ADMINISTRATION

1. MINIMUM CONSTRUCTION STANDARDS FOR BOILERS AND PRESSURE

VESSELS:

( a) Al l boi l er s, pr essur e vessel s, wat er heat er s, andst orage t anks, unl ess ot her wi se exempt , shal l ber egi st er ed on an annual basi s. Al l new boi l er s,pr essure vessel s, wat er heater s, and st orage t anksunl ess otherwi se exempt , t o be oper at ed i n t hi s

j ur i sdi ct i on, shal l be desi gned, const r uct ed,i nspect ed, st amped and i nst al l ed i n accordancewi t h t he ASME Code and t he l at est addendai ncl udi ng code cases i n ef f ect , and t hese r ul es andr egul at i ons. Boi l er s and pr essur e vessel s f or whi ch anASME Manuf actur ers ' Data Repor t i s requi r ed shal l beart he manuf actur er ' s "NB" number as r egi st ered wi t h t he

Nat i onal Boar d. A copy of t he Manuf act ur er s' DataReport , si gned by t he manuf act ur er' s r epr esent at i veand t he Nat i onal Boar d commi ssi oned i nspect or shal l bef i l ed wi t h t he Chi ef I nspect or t hr ough t he Nat i onalBoard.

( b) St at e Speci al - I f , due t o a val i d i mpedi ment t o f ul lASME Code compl i ance, a boi l er or pressure vesselcannot bear t he ASME and Nat i onal Board st ampi ng,det ai l s i n t he Engl i sh l anguage and Uni t ed St at escust omar y uni t s of t he pr oposed const r uct i on mat eri alspeci f i cat i ons and cal cul at i ons appr oved by aRegi st er ed Prof essi onal Engi neer exper i enced i n boi l erand pr essur e vessel desi gn shal l be submi t t ed t o t heAdmi ni st r at or by t he owner or user f or appr oval as"St at e Speci al " whi ch must be obt ai ned f r om t heAdmi ni st r at or bef or e const r uct i on i s st ar t ed.

( c) Bef or e a second- hand boi l er or pr essur e vessel , i si nstal l ed, appl i cat i on f or permi ssi on t o i nstal l i tshal l be f i l ed by t he owner or user wi t h t he Chi ef I nspect or and hi s appr oval obt ai ned.

( d) The f ol l owi ng shal l be exempt f r om t he ASME Codeconst r uct i on r equi r ement s of ( a) .

( l ) Water heat ers and water st orage tanks wher e none of

t he f ol l owi ng l i mi t at i ons ar e exceeded:

( i ) Heat i nput of 200, 000 BTU/ Hr ;

( i i ) Wat er t emper at ur e of 2l 0 degr ees Fahr enhei t ;

( i i i ) Nomi nal wat er capaci t y of l 20 gal l ons;except t hat t hey shal l be pr ovi ded wi t h one or more

saf ety r el i ef val ves meet i ng t he r equi r ement s of



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EHB- 6, Part I I I .

( 2) Cont i nuous coi l t ype hot wat er boi l er s used onl yf or "st eam vapor " cl eani ng of such t hi ngs asmachi ner y, equi pment and bui l di ng when none of t hef ol l owi ng l i mi t at i ons ar e exceeded:

( i ) 3/ 4 " di amet er t ubi ng or pi pe si ze wi t h nodrums or headers at t ached;

( i i ) Nomi nal wat er cont ai ni ng capaci t y does notexceed si x (6) gal l ons;

( i i i ) Water t emperatur e does not exceed 350 degr eesFahr enhei t .

( i v) St eam i s not gener at ed wi t hi n the coi l ,except t hat t hey shal l be pr ovi ded wi t h one

or more saf et y r el i ef val ves meet i ng t her equi r ement s of EBO- 6, Par t I I I .

( e) I n any ci r cumst ances other t han t he above, t he owneror user shal l cont act t he Chi ef I nspect or .

2. FREQUENCY OF INSPECTIONS OF BOILERS AND PRESSURE VESSELS

( a) Power boi l er s and hi ghpr essure, hi gh t emper at ur e wat erboi l er s shal l r ecei ve an i nspect i on annual l y whi chshal l be an i nt er nal i nspect i on wher e const r uct i onper mi t s; ot her wi se, i t shal l be as compl et e ani nspect i on as possi bl e. Such boi l er s shal l al so bei nspect ed ext ernal l y annual l y whi l e under normaloper at i ng condi t i ons.

( b) Low pr essur e boi l er s, hot wat er heat er s, and hot wat erst or age tanks shal l r ecei ve an i nspect i on bi enni al l y.

( l ) Steam or vapor boi l er s shal l have an exter nali nspect i on and an i nt er nal i nspect i onbi enni al l y wher e const r uct i on per mi t s.

( 2) Hot wat er heat i ng and hot water suppl y boi l er sshal l have an ext er nal i nspect i on bi enni al l yand wher e const r uct i on per mi t s, an i nt ernali nspect i on at t he di screti on of t he i nspect or .

( 3) Wat er Heater s i ncl udi ng hot wat er st orage t anksshal l have an ext er nal i nspect i on bi enni al l yand shal l i ncl ude t he f uncti on of al l cont r ol sand devi ces.

( c) Except as pr ovi ded f or i n ( d) and ( e) bel ow, unf i r edpr essur e vessel s shal l r ecei ve an i nspect i ont r i enni al l y. Thi s i nspecti on shal l be i nt er nal wher econst r uct i on per mi t s. Pr essur e vessel s not subj ect t oi nt er nal cor r osi on shal l be i nspect ed ext er nal l y.



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( d) Pressur e vessel s t hat are under t he super vi si on of anowner - user i nspect i on agency shal l be i nspect ed at t hesame i nterval unl ess ot her wi se agreed upon by t he Chi ef I nspect or wi t h that Agency.

( e) Based upon document at i on of saf e servi ce condi t i ons byt he owner or user of t he operat i ng equi pment and af t eran exter nal i nspect i on by t he Chi ef I nspect or , sai dChi ef I nspect or may, i n hi s di screti on, per mi tvar i at i ons i n t he i nspect i on f r equency r equi r ement s aspr ovi ded i n t hese Rul es and Regul at i ons.

3. NOTIFICATION OF INSPECTION

Cer t i f i cat e i nspect i on, as r equi r ed i n Sect i on 2 above,shal l be car r i ed out pr i or t o t he expi r at i on dat e of t hecer t i f i cat e at a t i me mut ual l y agr eeabl e t o t he i nspect or

and owner or user .

Ext ernal i nspect i ons may be perf ormed by t he i nspect ordur i ng r easonabl e hour s and wi t hout pr i or not i f i cat i on i naccordance wi t h 28- 25- 7.

When as a resul t of ext er nal i nspect i on or det er mi nat i on byot her obj ect i ve means i t i s t he i nspect or ' s opi ni on t hatcont i nued oper at i on of t he boi l er or pr essur e vesselconst i t ut es a menace t o publ i c saf ety, t he i nspect or mayr equest an i nt er nal i nspect i on or an appr opr i at e pr essur et est or bot h t o eval uat e condi t i ons. I n such i nst ances theowner or user shal l pr epare t he boi l er or pr essure vesself or such i nspect i ons or t est s as t he i nspect or desi gnat esi n accor dance wi t h 28- 25- 7.

4. EXAMINATION FOR AN INSPECTOR'S CERTIFICATE OF COMPETENCY

Exami nat i on f or an i nspect or ' s cer t i f i cat e of compet encymay be hel d at t he of f i ce of t he Di vi si on or at any otherl ocat i on t o be sel ect ed by t he Admi ni st r at or . An appl i cantf or an exami nat i on shal l have educat i on and experi enceequal t o at l east one of t he f ol l owi ng:

( a) a degr ee i n mechani cal engi neer i ng pl us one year of exper i ence i n desi gn, const r uct i on, oper at i on ori nspect i on of hi ghpr essur e boi l er s and pr essur evessel s;

( b) a degr ee i n a br anch of engi neer i ng, other t hanmechani cal engi neer i ng or an associ ate degr ee i nmechani cal t echnol ogy pl us t wo years of exper i ence i ndesi gn, const r uct i on, oper at i on or i nspect i on of hi gh pr essure boi l er s and pr essure vessel s;

( c) t he equi val ent of a hi gh school educat i on pl us t hr eeyear s of exper i ence:( l ) i n hi gh pr essur e boi l er and pr essur e vessel

const r ucti on or repai r ; or



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( 2) as an oper at i ng engi neer i n charge of hi ghpr essur e boi l er oper at i on; or

( 3) as an i nspect or of hi ghpr essur e boi l er s andpr essur e vessel s.

Appl i cat i ons f or exami nat i on shal l be i n wr i t i ng on a f or mt o be f ur ni shed by t he Admi ni st r at or st at i ng the educat i onof t he appl i cant , a l i st of hi s empl oyer s, hi s per i od of empl oyment and posi t i on hel d wi t h each empl oyer.Appl i cat i ons cont ai ni ng wi l l f ul f al s i f i cat i ons orunt r ut hf ul st at ement s shal l be cause f or r ej ect i on.Appl i cat i ons shal l be submi t t ed t o t he Chi ef I nspect or atl east 45 days pr i or t o the dat e of exami nat i on.

I f t he appl i cant ' s educat i on and exper i ence ar e accept abl et o t he Admi ni st r at or , he shal l be gi ven a wr i t t enexami nat i on deal i ng wi t h t he desi gn, const r uct i on,mai nt enance and r epai r of boi l ers and pr essur e vessel s and

t hei r appur t enances, and t he appl i cant shal l be accept edor r ej ect ed on t he mer i t s of t hi s exami nat i on. I f t heappl i cant i s successf ul i n meet i ng the r equi r ement s of t heDi vi si on, a cer t i f i cat e of compet ency wi l l be i ssued byt he Admi ni st r ator , when t he appl i cant i s empl oyed by anaut hor i zed i nspect i on agency as def i ned i n Par t I , I t ems 7and 27. Upon t he expi r at i on of 90 days, a appl i cant whof ai l ed t o pass t he exami nat i on wi l l be per mi t t ed t o t akeanother wr i t t en exami nat i on and hi s accept ance orr ej ect i on wi l l be det er mi ned by t he Admi ni st r at or on t hebasi s of t hi s exami nat i on.

5. EXAMINATION FEES A Fee of si xty dol l ar s ( 60. 00 wi l l be char ged f or eachappl i cant t aki ng t he exami nat i on f or a cer t i f i cat e of

compet ency.

6. CERTIFICATE OF COMPETENCY AND IDENTIFICATION CARD

` Upon r equest of hi s empl oyer , a cer t i f i cat e of compet encyand an i dent i f i cat i on car d may be i ssued by t heAdmi ni st r at or t o:

( a) a boi l er and pr essur e vessel i nspect or empl oyed by t heSt at e of Rhode I sl and.

( b) an i nspect or who i s empl oyed by an i nsurance companywhi ch i s aut hori zed t o i nsur e and does i nsur e agai nst

l oss f r om expl osi ons of boi l er s and pr essur e vessel si n t he St at e of Rhode I sl and.

( c) an i nspect or empl oyed as descr i bed i n ei t her ( a) or( b) above who conduct s shop or f i el d i nspect i ons of new boi l er s or pr essure vessel s i n accor dance wi t h theappl i cabl e ASME Code r equi r ement s.



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( d) an i nspect or who i s cont i nuousl y empl oyed by a companywhi ch oper at es pr essure vessel s i n t hi s St at e and hasa val i d owner - user i nspect i on agency agreement aspr ovi ded i n Par t I I , Sect i on 11, pr ovi ded t hat t heappl i cant has sat i sf act or i l y passed the exami nat i on asset f or t h i n Par t I I , Secti on 4 or pr ovi ded t hat( s) he hol ds a val i d commi ssi on or cer t i f i cat e of competency f r om a St ate t hat has a st andard of exami nat i on subst ant i al l y equal t o t hat of t hi s

j ur i sdi ct i on and a val i d commi ss i on and a cur r entcommi ssi on card i ssued by t he Nat i onal Boar d. Ther equest f or t he cer t i f i cat e of compet ency andi dent i f i cat i on car d shal l be compl et ed on f orms t o bepr ovi ded by t he Admi ni st r ator and shal l be accompani edby, when appl i cabl e, a f acsi mi l e of t he appl i cant ' scommi ssi on and commi ssi on card, cert i f i cate of compet ency and i dent i f i cat i on card as named above,and a f ee of si xty dol l ar s ( $60. 00) .

The cer t i f i cat e of competency and val i d i dent i f i cat i on

car d shal l be r et ur ned t o t he Admi ni st r at or when t hei nspector t o whom t hey were i ssued i s no l ongerempl oyed by t he or gani zat i on empl oyi ng hi m at t he t i met hat t he cer t i f i cat e was i ssued.

Each per son hol di ng a val i d cer t i f i cat i on of compet ency and who conduct s i nspect i ons as provi dedby the Act shal l appl y to the Admi ni st r at or on f ormspr ovi ded and obt ai n a renewal i dent i f i cat i on car dannual l y, not l at er t han Mar ch 31 of each year. Af ee of $30. 00 f or each car d shal l accompany eachappl i cat i on.

An i nspect or' s cer t i f i cat e of competency may besuspended by the Admi ni st r at or af t er due i nvest i gat i onand recommendat i on by t he Chi ef I nspect or f or adequat eand j ust cause. Wr i t t en not i ce of any such suspensi onshal l be gi ven by t he Admi ni st r at or, wi t hi n not moret han 10 days, t o t he i nspect or and hi s empl oyer.Per sons whose cer t i f i cat es of compet ency have beensuspended shal l be ent i t l ed t o an appeal t o t heAdmi ni st r at or as pr ovi ded f or i n t he Act and t o bepr esent i n person and r epr esent ed by counsel at t hehear i ng of t he appeal .

7. CONFLICT OF INTEREST

An i nspect or shal l not engage i n t he sal e of any ser vi ces,

ar t i cl e or devi ce r el at i ng t o boi l er s, pr essur e vessel s,or t hei r appur t enances.

8. INSPECTION REPORTS TO BE SUBMITTED BY INSPECTORS ( a) I nspect ors empl oyed by an I nsur ance Company shal l ,

wi t hi n one year of t he ef f ect i ve dat e of t hese r ul esand r egul at i ons f or boi l er s and t hr ee year s f orpr essur e vessel s, submi t t o t he Chi ef I nspect or ani nspect i on r epor t on Form NB- 5 of NATI ONAL BOARDI NSPECTI ON CODE f or each boi l er and pressur e vessel



14

subj ect t o i nspect i on i n t hi s St at e. Compl et e dat ashal l be submi t t ed on For m NB- 5 f or each nonst andardboi l er or pr essur e vessel .

( b) Subsequent i nspect i ons by aut hori zed i nsur ancei nspect ors, of both st andar d and nonst andar d boi l er sand pr essure vessel s shal l be r eport ed on For m NB- 6and NB- 7 of t he NATI ONAL BOARD I NSPECTI ON CODE.

( c) I nspect i on r eport s ar e r equi r ed i n ( a) and ( b) aboveshal l be submi t t ed wi t hi n 21 days f r om dat e of t hecompl et i on of t he i nspect i on.

( d) Owner - user i nspect i on agenci es shal l r epor t i naccordance wi t h ( b) and ( d) above or upon f ormsaccept abl e t o t he Chi ef I nspect or or Admi ni st r at or ,whi ch shal l be f i l ed as pr ovi ded i n Sect i on 11 of Par tI I .

9. INSURANCE COMPANIES TO NOTIFY CHIEF INSPECTOR OF NEW,CANCELLED OR SUSPENDED INSURANCE ON BOILERS OR PRESSURE

VESSELS Al l i nsur ance compani es shal l not i f y t he Chi ef I nspect orwi t hi n 30 days, of al l boi l er s or pr essur e vessel s onwhi ch i nsurance i s wr i t t en, cancel l ed, not r enewed orsuspended because of unsaf e condi t i ons.

10. AUTHORIZED INSPECTORS TO NOTIFY CHIEF INSPECTOR OF UNSAFE

BOILERS OR PRESSURE VESSELS I f an aut hor i zed i nspector, upon f i r st i nspecti on of anew r i sk, f i nds t hat a boi l er or pr essur e vessel or anyappur t enance t her eof , i s i n such condi t i on t hat hi scompany woul d r ef use i nsur ance or t hat i t does not compl ywi t h j ur i sdi ct i onal r ul es, t he company shal l i mmedi at el ynot i f y t he Chi ef I nspect or and submi t a r eport on t hedef ect s. I f , upon i nspect i on, an aut hor i zed i nspect orf i nds a boi l er or pr essur e vessel t o be unsaf e f or f ur t heroper at i on, he shal l pr ompt l y not i f y t he owner or user,st at i ng what r epai r s or other corr ect i ve measures ar er equi r ed t o br i ng t he obj ect i nt o compl i ance wi t h t heser ul es and r egul at i ons. Unl ess t he owner or user makessuch r epai r s or adopt s such other cor r ect i ve measurespr ompt l y, t he aut hor i zed i nspect or shal l i mmedi at el ynot i f y t he Chi ef I nspect or . Unt i l such cor r ect i ons have

been made no f ur t her operat i on of t he boi l er or pr essurevessel i nvol ved shal l be per mi t t ed. I f an i nspect i oncer t i f i cat e f or t he obj ect i s r equi r ed and i s i n f or ce,i t shal l be suspended by t he Chi ef I nspect or. Whenr e- i nspect i on est abl i shes t hat t he necessar y r epai r s havebeen made or cor r ect i ve act i ons have been t aken and t hatt he boi l er or pr essur e vessel i s saf e t o oper at e, t heChi ef I nspect or shal l be not i f i ed by r epor t . At t hat t i mean i nspecti on cer t i f i cat e, wher e appl i cabl e, wi l l bei ssued.



15

11. OWNER-USER INSPECTION AGENCY ( a) Any per son, f i r m par t ner shi p, or cor por at i on

oper at i ng pr essur e vessel s i n t hi s j ur i sdi ct i on mayseek appr oval and r egi st r at i on as an owner- useri nspect i on agency by f i l i ng an appl i cat i on wi t h t heAdmi ni st r ator on pr escr i bed f orms and request appr ovalby the Di vi si on. Each such appl i cat i on shal l beaccompani ed by a f ee of si xt y dol l ar s ( 60. 00) bondi n t he penal sum of t went y- f i ve t housand dol l ar s( $25, 000) whi ch shal l cont i nue to be val i d dur i ng thet i me the appr oval and r egi st r at i on of t he company asan owner - user i nspect i on agency i s i n ef f ect .

( b) Appl i cat i on and r egi st r at i on shal l show t he name of such agency and i t s pr i nci pal addr ess i n t hi s St at e,and t he name and address of t he per son or per sonshavi ng supervi si on over i nspect i ons made by sai dagency. Changes i n supervi sory personnel shal l be

r eport ed t o t he Admi ni st r at or wi t h 30 days af t er anysuch change.

( c) Each owner- user i nspect i on agency as r equi r ed by t hepr ovi si ons of t he Act and t hese r ul es and r egul at i onsshal l :

( l ) conduct i nspect i ons of pr essur e vessel s, notexempt by t he Act , ut i l i zi ng onl y qual i f i edi nspect i on per sonnel , as pr ovi ded i n Par t I I ,Sect i on 6;

( 2) r et ai n on f i l e at t he l ocat i on wher e t he equi pmenti s i nspect ed, a t r ue r ecord or copy of each of t he l at est i nspect i on r epor t s si gned by t hei nspect or ;

( 3) execut e and del i ver t o t he Chi ef I nspect or andt hose r esponsi bl e f or t he oper at i on of t hepr essur e vessel , a t r ue r epor t of each i nspect i ont oget her wi t h appr opr i ate r equi r ement s orr ecommendat i ons t hat r esul t f r omsuch i nspect i ons;

( 4) pr ompt l y noti f y t he Chi ef I nspect or of anypressure vessel whi ch does not meet t her equi r ement s f or saf et y;

( 5) mai nt ai n i nspect i on r ecor ds whi ch wi l l i ncl ude al i st of each pr essur e vessel cover ed by t he Act ,showi ng a ser i al number and such abbr evi ateddescr i pt i ons as may be necessary f ori dent i f i cat i on, t he dat e of l ast i nspecti on of each uni t and appr oxi mat e dat e f or t he nexti nspect i on, ar r i ved at by appl yi ng t heappr opr i at e r ul es t o al l dat a avai l abl e at t het i me such i nspect i on r ecor d i s compi l ed.



16

Regar di ng f r equency and t ype of i nspect i on, seePar t I I , Sect i on 2. Such i nspect i on r ecor d shal lbe r eadi l y avai l abl e f or exami nat i on by t he Chi ef I nspect or or hi s aut hor i zed r epr esent at i ve dur i ngbusi ness hour s.

12. DEFECTIVE CONDITIONS DISCLOSED AT TIME OF EXTERNAL

INSPECTION I f , upon an external i nspect i on, t her e i s evi dence of al eak or crack, suf f i ci ent cover i ng of t he boi l er orpr essur e vessel shal l be r emoved t o permi t t he i nspect ort o sat i sf act or i l y det er mi ne t he saf et y of t he boi l er orpr essur e vessel I f t he coveri ng cannot be r emoved at t hatt i me, he may or der t he oper at i on of t he boi l er orpr essure vessel s t opped unt i l such t i me as t he cover i ngcan be removed and proper exami nat i on made.

13. OWNER OR USER TO NOTIFY CHIEF INSPECTOR OF ACCIDENT When an acci dent occur s t o a boi l er , pr essure vessel ,power pi pi ng or pr ocess pi pi ng, t he owner or user shal lpr ompt l y not i f y t he Chi ef I nspect or by submi t t i ng adet ai l ed r epor t of t he acci dent . I n t he event of aper sonal i nj ur y or any expl osi on, not i ce shal l be gi veni mmedi atel y by t el ephone, t el egr aph or messenger , andnei t her t he boi l er , pr essur e vessel , power pi pi ng orpr ocess pi pi ng , nor any par t s ther eof , shal l ber emoved or di st urbed bef ore per mi ssi on has been grant edby t he Chi ef I nspect or , except f or t he pur pose of savi nghuman l i f e and l i mi t i ng consequent i al damage.

14. INSPECTION CERTIFICATE AND INSPECTION FEES ( a) Cer t i f i cat e I nspect i on by Aut hor i zed I nsur ance

I nspect or s or St at e I nspect or s

I f , af t er i nspect i on by an aut hor i zed i nsur ancei nspect or or st at e i nspect or , a boi l er or pr essur evessel i s f ound t o be saf e and i n conf ormance wi t ht hese rul es and r egul at i ons, t he owner or user shal lpay di r ectl y t o t he j ur i sdi cti on a bi enni alcer t i f i cat e f ee of si xt y ( $60. 00) dol l ar s f or eachboi l er whi ch shal l i ncl ude hot wat er heat er s. At r i enni al cert i f i cat e f ee of f or t y- f i ve ( $45. 00) shal lbe assessed f or each unf i r ed pr essure vessel i nspect edunder t he pr ovi si ons of R. I . G. L. 28- 25.

( b) Cer t i f i cat e I nspect i on by Aut hori zed Owner / UserI nspect i on Agency

I f a boi l er or pr essur e vessel af t er i nspecti on, byan aut hori zed owner / user i nspect i on agency i s f oundt o be sui t abl e and to conf or m t o these r ul es andr egul at i ons, t he owner or user shal l pay di r ect l y t ot he j ur i sdi cti on a f ee of si xt y dol l ar s ( $60. 00) f oreach boi l er or pr essur e vessel r equi r ed t o be



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i nspect ed under t he Act upon whi ch an i nspect i oncer t i f i cat e shal l be i ssued i n accor dance wi t hChapt er 28- 25- 10 and 28- 25- 11. Checks and moneyor der s f or payment of i nspect i on cer t i f i cat e f eesshoul d be made payabl e t o t he Depar t ment of Labor , Di vi si on of Occupat i onal Saf et y, Boi l erUni t .

( c) Cer t i f i cat e I nspect i on by St at e I nspect or

The owner or user of a boi l er or pressure vesselr equi r ed by t hi s Act t o be i nspect ed by t he Chi ef I nspect or , or by an aut hori zed St at e i nspect or ,shal l pay di r ect l y t o t he Di vi si on of Occupat i onalSaf et y, upon compl et i on of i nspect i on, f ees i naccor dance wi t h t he f ol l owi ng schedul e:

( l ) Power boi l er s and hi gh pr essure, hi gh t emper atur ewat er boi l er s

Certificate and Inspection Fees

Boi l er s of 50 sq. f t . of heat i ng sur f ace orl ess. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 96. 00

Boi l er s over 50 sq. f t . of heat i ng sur f ace and l esst han 2, 000 sq. f t . of heat i ng sur f ace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $120. 00

Boi l er s over 2, 000 sq. f t . of heat i ng sur f ace ormore and l ess t han 4, 000 sq. f t . of heat i ngsur f ace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $140. 00

Boi l er s of 4, 000 sq. f t . of heat i ng sur f ace or mor eand l ess t han l 0, 000 sq. f t . of heat i ngsur f ace. . . . . . . . . . . . . . . . $180. 00

Boi l er s of l 0, 000 sq f t of heat i ng sur f ace ormor e . . . . . . . . . . . . . . . . . . . $240. 00

External Inspections

Boi l er s of 50 sq. f t . of heat i ng sur f ace orl ess. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $30. 00

Boi l er s over 50 sq. f t . of heat i ng sur f ace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $60. 00

Not more t han t he equi val ent of t he cer t i f i cat e and

external i nspect i on f ees shal l be char ged orcol l ect ed f or any and al l i nspect i ons as above of anyboi l er i n any one ( 1) year except as pr ovi ded i npar agr aphs 5 and 6 bel ow. Si ze equi val enci es may bef ound i n Sect i on 27.

( 2) Heat i ng Boi l er s



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Certificate and Inspection Fees

( i ) A si ngl e f ee shal l be assessed f or i nspect i onsof boi l er s and st orage t anks at t he same l ocat i oni n accor dance wi t h t he f ol l owi ng schedul e:

Heat i ng boi l er s wi t hout a manhol e. . . . . $60. 00 Annual l y

Heat i ng boi l er s wi t h a manhol e. . . . . . . $120. 00 Annual l y

Hot wat er suppl y boi l ers . . . . . . . . . . . . . . $60. 00Annual l y( i i )Wat er heat er wi t h st or age t anks. . . . . . . $60. 00 Annual l ynot t o exceed $240. 00 annual l y per l ocat i on

( 3) For boi l er s wher e t he onl y sour ce of heat i sel ect r i cal ener gy, t he f ees of par agr aphs l and 2shal l appl y based on one ki l owat t bei ng equal t o onesquar e f oot of heat i ng sur f ace.

( 4) Pressur e Vessel s

Cer t i f i cat e and I nspect i on Fees

Each pr essur e vessel subj ect t o i nspect i on shal l bechar ged at a r ate of $30. 00 per year per vessel .A gr oup of pr essur e vessel s, such as t he r ol l s of apaper machi ne or dryer oper at i ng as a si ngl e machi neor uni t , shal l be consi der ed as one pr essur e vessel .

Not more t han one f ee shal l be charged or col l ectedf or any and al l i nspect i ons as above of any pr essurevessel s i n any r equi r ed i nspect i on per i od except asprovi ded i n par agr aph 5 bel ow.

( 5) Hydr ost at i c t est sWhen i t i s necessary t o make a speci al t r i p to wi t nesst he appl i cat i on of a hydr ost at i c t est , an addi t i onalf ee based on t he scal e of f ees out l i ned i n Par agr aph#6 bel ow shal l be charged.

( 6) Al l ot her i nspect i ons, i ncl udi ng r evi ews andsur veys, shop i nspect i ons, speci al i nspect i ons,and i nspect i ons of second- hand or used boi l er s, orpressur e vessel s made by t he Chi ef I nspect or oraut hor i zed i nspect or empl oyed by t he State of RhodeI sl and shal l be char ged at t he r at e of not l ess than$190. 00 f or 1/ 4 day ( 2 Hr s. ) , $275. 00 1/ 2 day ( 4

Hr s. ) , or $500. 00 f or one f ul l day, i ncl udi ngt r avel t i me, pl us al l expenses, i ncl udi ngt r avel i ng, meal s and l odgi ng, wher e appl i cabl e.Mi ni mumcharge shal l be 1/ 4 day ( $190. 00) .

( d) Di sposi t i on of f ees - The Admi ni st r at or shal l account f orand t r ansf er al l f ees so r ecei ved t o t he Tr easur er of t he



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St at e.

( e) I f t he owner or user of a boi l er or pr essur e vessel orsyst em, whi ch i s r equi r ed t o be i nspect ed r ef uses t oal l ow an i nspect i on t o be made or r ef uses t o pay t he f eest i pul at ed above, t he i nspecti on cer t i f i cat e shal l besuspended by t he Chi ef I nspect or unt i l t he owner or usercompl i es wi t h the requi r ement s.

( f ) The owner or user who causes a boi l er or pr essur e vesselor syst em t o be oper at ed wi t hout a val i d cer t i f i cat eshal l be subj ect to t he penal t y as pr ovi ded f or i n t heAct .

7. FEES FOR SERVI CES

( a) Hydr ost at i c t est s by st at e i nspect i ons $l 00. 00

( b) Repai r and al t er at i on per mi t 100. 00

( c) Ret ur n vi si t s f or vi ol at i ons/ char ged t o cont r act or s 100. 00

( d) Retur n check f ee 25. 00

( e) Over due i nvoi ces 25. 00

( f ) Cer t i f i cat e r epl acement f ee 10. 00

( g) Port abl e boi l er per mi t s 300. 00

15. VALIDITY OF INSPECTION CERTIFICATE An i nspect i on cer t i f i cat e, i ssued i n accor dance wi t h Par t I I ,Sect i on 14 shal l be val i d unt i l expi r at i on unl ess some def ector condi t i on af f ect i ng t he saf et y of t he boi l er or pr essur evessel i s di scl osed pr ovi ded, however , t hat a cer t i f i cat ei ssued f or a boi l er or pr essur e vessel i nspect ed by anaut hor i zed i nspect or empl oyed by an i nsur ance company shal lbe val i d onl y i f t he boi l er or pr essur e vessel f or whi ch i twas i ssued cont i nues t o be i nsured by a dul y aut hor i zedi nsur ance company.

16. RESTAMPING BOILERS AND PRESSURE VESSELS

When t he st ampi ng on a boi l er or pressur e vessel becomesi ndi st i nct , t he i nspect or shal l i nst r uct t he owner or usert o have i t r e- st amped. Request f or per mi ssi on t o r e- st amp t heboi l er or pr essure vessel shal l be made to the Chi ef I nspect or and pr oof of t he ori gi nal st ampi ng shal l accompanyt he r equest . The Chi ef I nspect or may gr ant such

aut hori zat i on. Re- st ampi ng aut hori zed by t he Chi ef I nspect orshal l be done onl y i n t he pr esence of an aut hori zedi nspect or , and shal l be i dent i cal wi t h t he or i gi nal st ampi ngexcept f or t he ASME Code Symbol Stamp. Not i ce of compl et i onof such st ampi ng shal l be f i l ed wi t h t he Chi ef I nspect or byt he i nspect or who wi t nessed t he st ampi ng on t he boi l er orpr essure vessel t oget her wi t h a f acsi mi l e of t he st ampi ngappl i ed.

17. PENALTY FOR OPERATION OF UNSAFE BOILERS OR PRESSURE VESSELS



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( a) I f , upon i nspecti on, a boi l er or pr essur e vessel i sf ound t o be i n such condi t i on t hat i t i s unsaf e t ooper at e, t he i nspect or shal l not i f y t he Chi ef I nspect orand t he i nspect i on cert i f i cate may be suspended by t heChi ef I nspect or .

( b) Any per son, f i r m, par t ner shi p or cor por at i on causi ngsuch obj ect s t o cont i nue t o be oper at ed shal l be subj ectt o t he penal t y pr ovi ded i n t he Act .

18. CONDEMNED BOILERS AND PRESSURE VESSELS ( a) Any boi l er or pressur e vessel havi ng been i nspect ed and

decl ar ed unf i t f or f ur t her servi ce by an i nspect or shal lbe st amped by t he Chi ef I nspect or or a deput y i nspect oron ei t her si de of t he St at e number wi t h the l et t er s " XXX"as shown by t he f ol l owi ng f acsi mi l e, whi ch wi l ldesi gnate a condemned boi l er or pr essur e vessel :

( b) Any per son, f i r m, par t ner shi p, or cor por at i on usi ng orof f er i ng f or sal e a condemned boi l er or pr essure vesself or oper at i on wi t hi n t hi s St at e shal l be subj ect to t hepenal t i es provi ded by the Act .

19. REINSTALLATION OF BOILERS OR PRESSURE VESSELS When a st andar d boi l er or pr essure vessel l ocat ed i n t hi s

j ur i sdi ct i on i s t o be moved out si de t he j ur i sdi ct i on f ort empor ar y use or f or r epai r , al t er at i on, or modi f i cat i on,appl i cat i on shal l be made by t he owner or user t o t he Chi ef I nspector f or per mi ssi on t o r ei nst al l t he boi l er or pr essur evessel i n t he j ur i sdi ct i on. When a nonst andar d boi l er orpr essur e vessel i s r emoved f r om t hi s St at e, i t shal l not berei nstal l ed wi t hi n t hi s St at e.

20. INSTALLATION, OPERATION, SALE OR OFFERING FOR SALE OF NON-STANDARD BOILERS OR PRESSURE VESSELS The i nst al l at i on, operat i on, sal e or t he of f er i ng f or sal eof nonst andar d boi l er s or pr essur e vessel s i n t hi s

j ur i sdi ct i on i s prohi bi t ed wi t hout permi ss i on f r om t he Chi ef I nspect or .

21. INSTALLATION OF USED OR SECOND-HAND BOILERS OR PRESSURE VESSELS Bef ore a used or second- hand boi l er or pr essur e vessel can beshi pped f or i nst al l at i on i n t hi s St at e, an i nspect i on mustbe made by an i nspect or qual i f i ed by t hi s j ur i sdi ct i on or by

an i nspect or hol di ng a val i d Nat i onal Boar d Commi ssi on, anddat a submi t t ed by hi m shal l be f i l ed by t he owner or user of t he boi l er or pr essur e vessel wi t h t he Chi ef I nspect or f orhi s appr oval . Such boi l ers and pr essure vessel s wheni nstal l ed i n t he j ur i sdi cti on shal l be equi pped wi t h f i t t i ngsand appurt enances t hat compl y wi t h t he r ul es and r egul at i onsf or new const r uct i on.

22. REINSTALLED BOILERS OR PRESSURE VESSELS When a st at i onary boi l er or pr essur e vessel i s moved and



21

r ei nst al l ed, t he at t ached f i t t i ngs and appur t enances shal lcompl y wi t h these r ul es and regul at i ons f or newi nstal l at i ons.

23. WORKING PRESSURE FOR EXISTING INSTALLATIONS Any aut hor i zed i nspect or may decr ease t he worki ng pressure onany exi st i ng i nst al l at i on i f t he condi t i on of t he boi l er orpr essure vessel warr ant s i t . I f t he owner or user does notconcur wi t h t he i nspect or' s deci si on, t he owner or user mayappeal t o t he Admi ni st r ator who may r equest a j oi nti nspect i on by t he Chi ef I nspect or and t he aut hor i zedi nspect or . The Chi ef I nspect or shal l render hi s r epor t t ot he Admi ni st r at or and t he Admi ni st r at or shal l r ender t hef i nal deci si on, based upon t he dat a cont ai ned i n t hei nspector' s r epor t s.

24. REPAIRS AND ALTERATIONS TO BOILERS & PRESSURE VESSELS ( a) Repai r s and al t er at i ons t o boi l er s and pr essur e vessel s

shal l be made i n accordance wi t h t he r ul es of t heNATI ONAL BOARD I NSPECTI ON CODES l at est edi t i on.

Repai r s shal l be made by a r epai r organi zat i on havi ng oneof t he f ol l owi ng t ypes of aut hor i zat i on:

( 1) an or gani zat i on i n possessi on of a val i d Cer t i f i cat eof Author i zat i on f or use of t he "R" Symbol St amp,i ssued by t he Nat i onal Boar d.

( 2) an organi zat i on i n possessi on of a val i d ASMECer t i f i cat e of Aut hor i zat i on pr ovi ded such r epai r sar e wi t hi n t he scope of t he or gani zat i on' s Qual i t yCont r ol Syst em.

( 3) an or gani zat i on worki ng wi t hi n t he St at e pr ovi dedaut hor i zat i on f or t he or gani zat i on t o per f or m suchr epai r s has been i ssued by the Chi ef I nspect or.

( b) Al t er at i ons t o a boi l er or pr essur e vessel shal l be madeby an organi zat i on i n possessi on of a val i d ASMECer t i f i cat e of Aut hor i zat i on.

25. REPAIRS TO PRESSURE RELIEF VALVES ( a) Repai r s t o pr essur e r el i ef val ves shal l be made onl y by

an or gani zat i on whi ch hol ds a val i d Cer t i f i cat i on of Aut hori zat i on f or use of t he Nat i onal Boar d Pr essur eRel i ef Val ve Repai r "VR" Symbol St amp. The i ni t i ali nst al l at i on t est i ng and adj ust ment s of a new pr essur e

r el i ef val ve on a boi l er or pr essur e vessel ar e notconsi dered a r epai r , i f made by t he manuf actur er orassembl er of t he val ve.

( b) The Chi ef I nspect or may aut hori ze pr oper l y t r ai ned andqual i f i ed empl oyees of boi l er and pr essure vessel usersor t hei r desi gnees t o make adj ust ment s t o set pr essur eand/ or bl ow- down t o pressure r el i ef val ves owned by t hem,pr ovi ded t he adj ust ed set t i ngs and/ or capaci t i es and t hedat e of t he adj ust ment are r ecorded on a metal t ag



22

secur ed t o t he seal wi r e. Al l exter nal adj ust ment s shal lbe r eseal ed showi ng t he i dent i f i cat i on of t heorgani zat i on maki ng t he adj ust ment s. A r ecor d of al lext ernal adj ust ment s shal l be mai ntai ned and madeavai l abl e t o t he i nspect or .

( c) No per son shal l at t empt t o r emove or do any work on anysaf et y appl i ance pr escri bed by t hese r ul es andr egul at i ons whi l e t he appl i ance i s subj ect t o pr essur e.

( d) Shoul d any of t hese appl i ances be r emoved f or r epai rdur i ng an out age of a boi l er or pr essur e vessel , t heymust be r ei nst al l ed and i n pr oper worki ng order bef oret he obj ect i s agai n pl aced i n ser vi ce.

( e) No per son shal l al t er any saf et y or saf et y r el i ef val vesor pr essure r el i ef devi ces i n any manner to mai nt ai n aworki ng pr essure i n excess of t hat stated on t he boi l eror pr essur e vessel i nspect i on cer t i f i cat e.

26. RIVETED PATCHES I n appl yi ng r i vet ed pat ches, t he desi gn of t he pat ch andmet hod of i nst al l at i on shal l be i n accor dance wi t h t heNat i onal Boar d I nspect i on Code, 1973 Edi t i on. Appr oval f orsuch r epai r s must be obt ai ned f r om t he chi ef i nspect or pri ort o maki ng such repai r s.

27. REQUIREMENTS FOR NEW INSTALLATIONS I n accor dance wi t h Chapt er 28- 25- 10, any person erect i ng ori nst al l i ng a new or second- hand boi l er or pr essur e vesselshal l f i r st make appl i cat i on f or a per mi t t o i nst al l t o t heDi vi si on of Occupat i onal Saf et y, Boi l er Uni t . A per mi tf ee of one hundr ed t went y dol l ar s ( $l 20. 00) wi l l be r equi r edf or al l heat i ng boi l er s ( l ow pr essur e) and a f ee of t hr eehundr ed dol l ar s ( $300. 00) f or al l power boi l er s ( hi ghpr essur e) . The i nst al l er of such i nst al l at i ons must recor dhi s/ her Pi pef i t t er Mast er I l i cense number on t he per mi tappl i cat i on.

Al l new and second- hand i t em i nst al l at i ons shal l compl y wi t ht he gener al r equi r ement s i n Par t I V of t hese r egul at i ons. I naddi t i on, appl i cabl e sect i ons of t hese r egul at i ons t hatper t ai n t o t he speci f i c r equi r ement s f or i t ems f al l i ng i nt ocat egor i es out l i ned i n Secti on I I I , Par t s 1, 2 and 3,shal l be f ol l owed.( a) No boi l er or pr essur e vessel shal l her eaf t er be i nst al l ed

i n t hi s St at e unl ess i t has been const r uct ed i n

accordance wi t h ASME Code, r egi st ered wi t h t he Nat i onalBoar d and i nst al l ed i n conf ormi t y wi t h t hese r ul es andr egul at i ons except :

( l ) t hose exempt by t he Act ;

( 2) t hose out l i ned i n Par t I I , Secti on 1 ( b) .

( b) The st ampi ng shal l not be conceal ed by l aggi ng or pai ntand shal l be exposed at al l t i mes unl ess a sui t abl e



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r ecor d i s kept of t he l ocat i on of t he st ampi ng so t hat i tmay be readi l y uncover ed at any t i me t hi s may be desi r ed.

28. APPLICATION OF STATE SERIAL NUMBERS ( a) Upon compl et i on of t he i nst al l at i on of a boi l er or

pr essur e vessel , or at t he t i me of the i ni t i alcer t i f i cat e i nspecti on of an exi st i ng i nst al l at i on eachboi l er or pr essur e vessel shal l be i dent i f i ed by t hei nspect or wi t h a ser i al number of t he St at e, consi st i ngof l et t er s and f i gur es t o be not l ess t han 5/ l 6 i nch i nhei ght and arr anged as f ol l ows:

( R. I . ) XXXX

( b) Al l cast i r on, l ow- pr essur e heat i ng boi l er s shal l havesecur el y at t ached t o t he f r ont of t he boi l er a cor r osi onr esi st ant met al t ag or sui t abl e t ag al l owed byconst r uct i on code , whi ch shal l have t he seri al number

of t he St at e stamped t her eon. Al l pr essure vessel sconst r uct ed of cast i r on, or of mat er i al of sucht hi ckness t hat i t shoul d not be st amped, shal l havesecur el y at t ached a cor r osi on r esi st ant met al t ag and orsui t abl e t ag al l owed by t he const r uct i on code , whi chshal l have t he ser i al number of t he State st ampedt hereon.

29. VARIATIONS ( a) Any per son who bel i eves t he rul es and regul at i ons

promul gat ed under 28- 25 of t he General Laws i mpose anundue bur den upon t he owner or user , may r equest avar i at i on f r om such r ul e or regul at i on. The r equest f orvar i at i on shal l be made t o t he Admi ni st r at or of Occupat i onal Saf et y i n wr i t i ng and shal l speci f y howequi val ent saf et y i s t o be mai nt ai ned. TheAdmi ni st r at or , af t er i nvest i gat i on and such hear i ng asi t may di r ect , may gr ant such var i at i on f r om t he t er msof any r ul e or r egul at i on pr ovi ded such speci alcondi t i ons as may be speci f i ed ar e mai nt ai ned i n or der t opr ovi de equi val ent saf et y.

( b) Any person deni ed a var i ance under Sect i on 30 ( a) of t hese r ul es, may gri eve such determi nat i on by submi t t i ngsuch appeal i n wr i t i ng t o t he Occupat i onal Saf et y andHeal t h Revi ew Boar d. Sai d board, cr eat ed by Chapter28- 20 of t he General Laws, shal l hear evi dence

concerni ng such act i on and det ermi ne whet her sai dvar i at i on does, i n f act , pr ovi de f or equi val ent saf et y.( c) When t her e i s a r eason t o bel i eve, or upon r ecei pt of a

compl ai nt t hat a var i at i on does not provi de f r eedom f r omdanger equi val ent t o t he publ i shed r ul e or r egul at i on,t he Admi ni st r at or or Chi ef I nspect or by di r ect i on af t ernot i ce t o t he owner or user and compl ai nant , and af t erhear i ng and i nvest i gat i on as i t may di r ect , may cont i nuei n f or ce, suspend, r evoke, or modi f y t he condi t i onsspeci f i ed i n any var i at i on. No decl ar at i on, act or



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omi ssi on of t he Admi ni st r at or or of t he Chi ef I nspect or ,or aut hor i zed i nspect or s ot her t han a wr i t t en orderaut hori zi ng a var i at i on as per mi t t ed above, shal l bedeemed t o exempt , ei t her whol l y or i n par t , expr essl yor i mpl i ed, any owner or user f r om f ul l compl i ance wi t ht he ter ms of any rul e or r egul at i on.

30. PENALTIES Any per son, f i r m or cor por at i on vi ol at i ng any of t hepr ovi si ons of t hese r ul es and r egul at i ons shal l be char gedwi t h a vi ol at i on and may be subj ect t o a f i ne not t o exceed$500. 00 per day f or each such vi ol at i on. The Depart ment of Labor shal l i mpose sai d f i ne on t he i nst al l er of newconst r uct i on or t he owner / user of exi st i ng boi l er s orpr essur e vessel s as pr ovi ded f or i n Sect i on 28- 25- 16 of t heAct . Each day of such oper at i on i n vi ol at i on of t hepr ovi si ons shal l be consi der ed a separ at e of f ense.

PART III

EXISTING INSTALLATION

The t erm "exi st i ng i nst al l at i on", as used i n t hi s part , meansany boi l er or pr essur e vessel as def i ned i n Sect i on 1 of t heser ul es i nst al l ed pr i or t o J ul y 1, 1985.

SECTION 1 - POWER BOILERS

EBO-1 - Age Li mi t of Exi st i ng Boi l er s( a) The age l i mi t of any boi l er of nonst andar d const r uct i on,

i nst al l ed pr i or t o t he dat e t he Act became ef f ect i ve, shal lbe 30 year s except t hat , a boi l er havi ng other t hanl ap- r i vet ed l ongi t udi nal j oi nt , af t er a t hor ough i nt er naland ext ernal i nspect i on, and when r equi r ed by t hei nspect or , a hydr ost at i c pr essur e t est of 1- 1/ 2 t i mes t heal l owabl e wor ki ng pr essur e hel d f or a per i od of at l east 30mi nut es dur i ng whi ch no di st r ess or l eakage devel ops, maybe cont i nued i n operat i on at t he worki ng pr essur e determi nedby EBO- 3. The age l i mi t of any nonst andard boi l er havi ngl ap- r i vet ed l ongi t udi nal j oi nt s and oper at i ng at a pr essur ei n excess of 50 psi shal l be 20 year s. Thi s type of boi l er ,when r emoved f r om an exi st i ng set t i ng, shal l not ber ei nst al l ed f or a pr essur e i n excess of l 5 psi . Ar easonabl e t i me f or r epl acement , not t o exceed one year,may be gi ven at t he di scr et i on of t he Chi ef I nspect or.

( b) The age l i mi t of boi l er s of st andar d const r uct i on i nst al l edpr i or t o t he dat e t hi s l aw became ef f ect i ve shal l bedependent on t horough i nt ernal and ext ernal i nspect i on andwher e r equi r ed by t he i nspect or, a hydr ost at i c pr essur et est not exceedi ng 1- 1/ 2 t i mes the al l owabl e worki ngpr essur e. I f t he boi l er , under t hese t est condi t i ons,exhi bi t s no di st r ess or l eakage, i t may be cont i nued i noperat i on at t he worki ng pressure det ermi ned by EBO- 2.

( c) The shel l or dr um of a boi l er i n whi ch a l ap seam cr ack



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devel ops al ong a l ongi t udi nal l ap- r i vet ed j oi nt shal l becondemned. A l ap seamcr ack i s a cr ack f ound i n l ap seamsextendi ng par al l el t o t he l ongi t udi nal j oi nt and l ocat edei t her bet ween or adj acent t o ri vet hol es.

EBO-2 Maxi mum Al l owabl e Worki ng Pr essur e f or St andard Boi l er The maxi mum al l owabl e wor ki ng pressure f or st andardboi l er s shal l be deter mi ned i n accor dance wi t h t he appl i cabl epr ovi si ons of t he edi t i on of t he ASME Code under whi ch t heywere const r uct ed and st amped.

EBO-3 Maxi mum Al l owabl e Worki ng Pressure f or Nonst andar dBoi l ers

( a) The maxi mum al l owabl e worki ng pr essur e f or boi l er sf abr i cat ed by r i vet i ng shal l be det er mi ned by t heappl i cabl e r ul es of t he 1971 Edi t i on of Sect i on I of t heASME Code.

The l owest f act or of saf et y permi ss i bl e on exi st i ngi nst al l at i ons shal l be 5. 0, except f or

hor i zont al - r et ur n- t ubul ar boi l er s havi ng cont i nuousl ongi t udi nal l ap seams mor e t han 12 f t . i n l engt h, t hef act or of saf et y shal l be 8. When t hi s l at t er t ype of boi l ers i s removed f romi t s exi sti ng set t i ng, i t shal lnot be r ei nst al l ed f or pr essur es i n excess of 15 psi .

( b) The maxi mum al l owabl e worki ng pr essure f or boi l er s of wel ded const r uct i on i n ser vi ce may not exceed t hatal l owabl e i n Sect i on I of t he ASME Code f or new boi l er sof t he same const r uct i on.

The maxi mum al l owabl e wor ki ng pressure on t he shel l of aboi l er or dr um shal l be det er mi ned by t he st r engt h of t heweakest cour se comput ed f r om t he t hi ckness of t he pl ate,t he t ensi l e st r engt h of t he pl at e, t he ef f i ci ency of t hel ongi t udi nal j oi nt , t he i nsi de di amet er of t he cour se,and t he f act or of saf et y al l owed by t hese r ul es i naccor dance wi t h the f ol l owi ng f ormul a:

TStE = maxi mum al l owabl e wor ki ng pressure, psi RFS where

TS = speci f i ed mi ni mum t ensi l e st r engt h of shel l pl at emat er i al . When t he t ensi l e st r engt h of st eel orwr ought - i r on shel l pl at e i s not known, i t shal l bet aken as 55, 000 psi f or st eel and 45, 000 psi f or

wr ought - i r on.

t = mi ni mum t hi ckness of shel l pl at e, i n weakestcour se, i n i nches.

E = ef f i ci ency of l ongi t udi nal j oi nt , met hod of determi ni ng whi ch i s gi ven i n Par agr aph PG- 27 of Sect i on I of t he ASME Code.

R = i nsi de r adi us of t he weakest cour se of t he shel l



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or dr um, i n i nches.

FS = f act or of saf et y whi ch shal l be at l east 5. 0.

( c) The i nspect or may i ncrease t he f act or of saf et y, i f t hecondi t i on and saf et y of t he boi l er war r ant s i t .

EBO-4 Cast I r on Headers and Mud Dr ums

The maxi mum al l owabl e wor ki ng pressure on a wat er t ube boi l er ,t he t ubes of whi ch ar e secur ed t o cast i r on or mal l eabl e i r onheaders, or whi ch have cast i r on mud drums, shal l not exceedl 60 psi .

EBO-5 Pr essur e on Cast I r on Boi l er s

The maxi mum al l owabl e wor ki ng pressure f or any cast i r onboi l er , except hot wat er boi l er s, shal l be 15 psi . SeeEHB- 1, 2 and 4.

EBO-6 Saf ety Val ves

( a) The use of wei ght ed- l ever saf et y val ves or saf et y val veshavi ng ei t her t he seat or di sc of cast i r on ar e pr ohi bi t ed;val ves of t hi s t ype of const r uct i on shal l be r epl aced bydi r ect , spr i ng l oaded, pop- t ype val ves t hat conf or m t o t her equi r ement s of ASME Code, Sect i on I .

( b) Each boi l er shal l have at l east one ASME/ NB Stamped andcer t i f i ed saf et y val ve, and i f i t has mor e t han 500 sq. f t .of wat er - heat i ng sur f ace, or an el ect r i c power i nput of mor et han l l 00 KW, i t shal l have t wo or more saf et y val ves of t hesame t ype.

( c) The val ve or val ves shal l be connect ed t o t he boi l er ,i ndependent of any other st eam connect i on; and at t ached ascl ose as possi bl e t o t he boi l er , wi t hout unnecessar yi nt er veni ng pi pe or f i t t i ngs. Wher e al t er at i on i s requi r ed t oconf orm t o t hi s r equi r ement , owner s or user s shal l be al l owedr easonabl e t i me i n whi ch t o compl ete t he work as per mi t t ed byt he Chi ef I nspect or .

( d) No val ves of any descri pt i on shal l be pl aced bet ween t hesaf et y val ve and t he boi l er nor on t he escape pi pe, i f used.When an escape pi pe i s used, i t shal l be at l east t he f ul lsi ze of t he saf et y val ve di schar ge and f i t t ed wi t h an opendr ai n to pr event wat er l odgi ng i n the upper par t of t he saf et y

val ve or i n t he escape pi pe. When an el bow i s pl aced on asaf et y val ve escape pi pe, i t shal l be l ocat ed cl ose t o t hesaf et y val ve out l et or t he escape pi pe shal l be anchored andsupport ed secur el y. Al l saf et y di schar ges shal l be so l ocat edor pi ped as t o be car r i ed cl ear f r om wal kways or pl at f or ms.

( e) The saf et y val ve capaci t y of each boi l er shal l be sucht hat t he saf et y val ve or val ves wi l l di schar ge al l t he st eamt hat can be gener at ed by t he boi l er wi t hout al l owi ng t hepr essur e t o r i se more t han 6 per cent above t he hi ghest



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pr essur e t o whi ch any val ve i s set , and i n no case t o moret han 6 per cent above t he maxi mumal l owi ng worki ng pressure.

( f ) One or more saf et y val ves on ever y boi l er shal l be set ator bel ow t he maxi mum al l owabl e worki ng pressure. Ther emai ni ng val ves may be set wi t hi n a r ange of 3 per cent abovet he maxi mum al l owabl e worki ng pressure, but t he r ange of set t i ng of al l t he saf et y val ves on a boi l er shal l not exceed10 percent of t he hi ghest pr essur e to whi ch any val ve i s set .

( g) When boi l er s of di f f erent maxi mum al l owabl e worki ngpr essur es wi t h mi ni mum saf ety val ve set t i ngs var yi ng more t hansi x per cent are so connect ed t hat st eam can f l ow t owar d t hel ower pr essur e uni t s, t he l at t er shal l be pr ot ect ed byaddi t i onal saf et y val ve capaci t y, i f necessar y, on t he l owerpr essur e si de of t he system. The addi t i onal saf et y val vecapaci t y shal l be based upon t he maxi mumamount of st eam whi chcan f l ow i nt o the l ower pr essur e syst em.

( h) I n those cases wher e t he boi l er i s suppl i ed wi t h f eed- wat er

di r ect l y f r omwat er mai ns wi t hout t he use of f eedi ng appar at us( not t o i ncl ude r et ur n t r aps) , no saf et y val ve shal l be setat a pr essure gr eat er t han 94 per cent of t he l owest pr essureobt ai ned i n t he suppl y mai n f eedi ng t he boi l er .

( i ) The r el i evi ng capaci t y of t he saf et y val ves on any boi l ershal l be checked by one of t he t hr ee f ol l owi ng methods and,i f f ound t o be i nsuf f i ci ent , addi t i onal val ves shal l bepr ovi ded:

( 1) by maki ng an accumul at i on t est , whi ch consi st s of shut t i ng of f al l ot her st eam di schar ge out l et s f r om t he boi l erand f orci ng t he f i r es t o t he maxi mum. The saf ety val vecapaci t y shal l be suf f i ci ent t o pr event a r i se of pr essur e i nexcess of 6 percent of t he maxi mum al l owabl e worki ng pr essur e.

Thi s met hod shoul d not be used on a boi l er wi t h a super - heat eror r e- heat er ;

( 2) by measuri ng t he maxi mum amount of f uel t hat can be bur nedand comput i ng t he corr espondi ng evaporat i ve capaci t y ( st eamgener at i ng capaci t y) upon t he basi s of the heat i ng val ue of t hi s f uel . These comput at i ons shal l be made as out l i ned i nt he Appendi x of t he ASME Code, Sect i on I ;

( 3) by measuri ng t he maxi mum amount of f eed- wat er t hat can beevaporated;When ei t her of t he methods out l i ned i n ( 2) or ( 3) i s empl oyed,

t he sum of t he saf et y val ve capaci t i es shal l be equal t o orgreat er t han t he maxi mumevaporat i ve capaci t y ( maxi mum st eamgener at i ng capaci t y) of t he boi l er .

EBO-7 Boi l er Feedi ng

Each boi l er shal l have a f eed suppl y whi ch wi l l per mi t i t t obe f ed at any t i me whi l e under pr essur e.

A boi l er havi ng more t han 500 sq. f t . of wat er heat i ng



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sur f ace shal l have at l east t wo sui t abl e means of f eedi ng, atl east one of whi ch shal l be a f eed pump. A sour ce of f eed ata pr essure 6 per cent gr eat er t han t he set pr essur e of t hesaf ety val ve wi t h t he hi ghest set t i ng may be consi dered one of t he means. Boi l er s f i r ed by gaseous, l i qui d, or sol i d f ueli n suspensi on may be equi pped wi t h a si ngl e means of f eedi ngwater pr ovi ded means are f urni shed f or t he shut of f of heati nput pr i or t o t he wat er l evel r eachi ng t he l owest saf e l evel .

The f eed- wat er shal l be i nt r oduced i nt o a boi l er i n such amanner t hat t he wat er wi l l not be di schar ged di r ect l y agai nstsur f aces exposed t o gases of hi gh t emperat ur e or t o di r ectr adi at i on f r om the f i r e. For pr essur es of 400 psi or over ,t he f eed- wat er i nl et t hr ough t he dr um shal l be f i t t ed wi t hshi el ds, sl eeves, or ot her sui t abl e means t o r educe t heef f ect s of t emper at ur e di f f er ent i al s i n t he shel l or head.

The f eed pi pi ng t o t he boi l er shal l be provi ded wi t h a checkval ve near t he boi l er and a val ve or cock between t he checkval ve and t he boi l er . When t wo or more boi l er s ar e f ed f r oma

common source, t her e shal l al so be a val ve on t he branch t oeach boi l er bet ween t he check val ve and t he sour ce of suppl y.Whenever a gl obe val ve i s used on f eed pi pi ng, t he i nl etshal l be under t he di sc of t he val ve.

I n al l cases wher e r et ur ns ar e f ed back t o t he boi l er bygr avi t y, t her e shal l be a check val ve and st op val ve i n eachr et ur n l i ne, t he st op val ve t o be pl aced bet ween t he boi l erand t he check val ve, and both shal l be l ocat ed as cl ose t ot he boi l er as i s pr act i cabl e. I t i s r ecommended t hat no st opval ves be pl aced i n t he suppl y and r etur n pi pe connect i ons of a s i ngl e boi l er i nstal l at i on.

Wher e de- aer at i ng heaters are not empl oyed, i t i s r ecommendedt hat t he t emper ature of t he f eed- water be not l ess t han 120degr ees Fahr enhei t t o avoi d t he possi bi l i t y of set t i ng upl ocal i zed st r ess. Wher e de- aer at i ng heat er s ar e empl oyed, i ti s r ecommended t hat t he mi ni mumf eed- wat er t emper at ure be notl ess t han 215 degr ees Fahr enhei t so t hat di ssol ved gases maybe t hor oughl y r el eased.

EBO-8 Wat er Level I ndi cat or s

Each boi l er , except f or ced- f l ow st eam gener at or s wi t h nof i xed st eamand wat erl i ne, and hi gh- t emper atur e wat er boi l er sof t he f or ced ci r cul at i on t ype t hat have no st eam andwat er - l i ne, shal l have at l east one wat er gage gl ass.

Boi l ers oper at ed at pr essur es over 400 psi shal l be pr ovi dedwi t h t wo water gage gl asses whi ch may be connect ed t o a si ngl ewater col umn or connect ed di r ect l y t o t he dr um.

Two i ndependent r emot e l evel i ndi cat or s may be provi dedi nst ead of one of t he t wo r equi r ed gage gl asses f or boi l erdr um wat er l evel i ndi cat i on i n t he case of power boi l er s wi t hal l dr um saf ety val ves set at or above 900 psi . When bothr emot e l evel i ndi cat or s ar e i n r el i abl e oper at i on, t her emai ni ng gage gl ass may be shut of f , but shal l be mai nt ai ned



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i n ser vi ceabl e condi t i on.

When t he di r ect r eadi ng of gage gl ass wat er l evel i s notr eadi l y vi si bl e t o t he oper at or i n hi s wor ki ng ar ea, t wodependabl e i ndi r ect i ndi cat i ons shal l be pr ovi ded, ei t her byt r ansmi ssi on of t he gage gl ass i mage or by r emot e i ndi cators.

The l owest vi si bl e part of t he wat er gage gl ass shal l be atl east 2 i n. above t he l owest per mi ssi bl e wat er l evel , atwhi ch l evel t here wi l l be no danger of over heat i ng any par t of t he boi l er when i n oper at i on at t hat l evel . When r emote l eveli ndi cat i on i s pr ovi ded f or the oper at or i n l i eu of t he gagegl ass, t he same mi ni mum l evel r ef er ence shal l be cl ear l ymar ked.

Connect i ons f r om t he boi l er t o t he r emot e l evel i ndi cat orshal l be at l east 3/ 4 i nch pi pe si ze t o and i ncl udi ng t hei sol at i on val ve and f r om t her e t o t he r emot e l evel i ndi cat orat l east 1/ 2 i n. O. D. t ubi ng. These connect i ons shal l becompl et el y i ndependent of ot her connect i ons f or any f unct i on

ot her t han wat er l evel i ndi cat i on. For pr essur es of 400 psior over , l ower connect i ons t o dr ums shal l be pr ovi ded wi t hshi el ds, sl eeves, or ot her sui t abl e means t o r educet emper at ur e di f f er ent i al s i n the shel l s or heads.

Boi l er s of t he hor i zont al f i r e- t ube t ype shal l be so set t hatwhen t he water i s at t he l owest r eadi ng i n t he water gagegl ass t her e shal l be at l east 3 i n. of wat er over t he hi ghestpoi nt of t he t ubes, f l ues, or cr own sheet s.

Boi l ers of l ocomot i ves t ype shal l have at l east one wat ergl ass pr ovi ded wi t h t op and bot t omshut of f cocks and l amp,and t wo gage cocks f or boi l ers 36 i n. i n di ameter and under,and t hr ee gage cocks f or boi l er s over 36 i n. i n di amet er .

The l owest gage cock and t he l owest r eadi ng of wat er gl assshal l not be l ess t han 2 i n. above t he hi ghest poi nt of cr ownsheet on boi l er s 36 i n. i n di amet er and under , nor l ess t han3 i n. f or boi l er s over 36 i n. i n di amet er . These ar emi ni mum di mensi ons, and on l arger l ocomot i ves and t hoseoperat i ng on st eep gr ades, t he hei ght shoul d be i ncr eased,i f necessary, t o compensate f or change of water l evel ondescendi ng grades.

The bot t om mount i ng f or wat er gl ass and f or wat er col umn i f used must ext end not l ess t han 1- 1/ 2 i n. i nsi de t he boi l er

and beyond any obst acl e i mmedi atel y above i t , and t he passaget her ei n must be st r ai ght and hor i zont al .

Tubul ar wat er gl asses must be equi pped wi t h a prot ect i ngshi el d.

Al l connect i ons on t he gage gl ass shal l be not l ess t han 1/ 2i n. pi pe si ze. Each wat er - gage gl ass shal l be f i t t ed wi t h adr ai n cock or val ve havi ng an unr est r i ct ed dr ai n openi ng of not l ess t han 1/ 4 i n. di amet er to f aci l i t at e cl eani ng. When



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t he boi l er operat i ng pr essure exceeds 100 psi t he gl ass shal lbe f ur ni shed wi t h a connect i on t o i nst al l a val ved dr ai n t ot he ash pi t or ot her saf e di schar ge poi nt .

Each water gage gl ass shal l be equi pped wi t h a t op and abot t om shut of f val ve of such t hr ough- f l ow const r uct i on as t opr event st oppage by deposi t s of sedi ment s. I f t he l owestval ve i s mor e t han 7 f t . above t he f l oor or pl at f or m f r omwhi ch i t i s oper at ed, t he oper at i ng mechani sm shal l i ndi cat eby i t s posi t i on whet her t he val ve i s open or cl osed. Thepr essur e- t emper at ur e rat i ng shal l be at l east equal t o that of t he l owest set pr essure of any saf et y val ve on t he boi l er dr umand t he cor r espondi ng sat ur ated- st eam t emperatur e.

St r ai ght - r un gl obe val ves, shal l not be used on suchconnect i on.

Aut omat i c shut of f val ves, i f per mi t t ed t o be used, shal lconf orm t o the requi r ement s of Sect i on I of t he ASME Code.

EBO-9 Water Columns

The wat er col umn shal l be so mount ed t hat i t wi l l mai nt ai n i t scor r ect posi t i on r el at i ve t o t he nor mal wat er l i ne underoper at i ng condi t i ons.

The mi ni mum si ze of pi pes connect i ng t he wat er col umn t o aboi l er shal l be 1 i n. For pr essur es of 400 psi or over ,l ower water col umn connect i ons t o dr ums shal l be pr ovi ded wi t hshi el ds, sl eeves, or ot her sui t abl e means t o r educe t heef f ect of t emper at ur e di f f er ent i al s i n t he shel l s or heads.Wat er gl ass f i t t i ngs or gage cocks may be connect ed di r ect l yt o t he boi l er .

The st eam and wat er connect i ons t o a wat er col umn or a wat ergage gl ass shal l be such t hat t hey ar e r eadi l y accessi bl e f ori nt ernal i nspect i on and cl eani ng. Some accept abl e methods of meet i ng t hi s r equi r ement ar e by pr ovi di ng a cross or f i t t i ngwi t h a back out l et at each r i ght - angl e tur n t o per mi ti nspect i on and cl eani ng i n bot h di r ect i ons, or by usi ng pi pebends or f i t t i ngs of a t ype whi ch does not l eave an i nt ernalshoul der or pocket i n the pi pe connect i on and wi t h a r adi us of cur vat ur e whi ch wi l l permi t t he passage of a r otar y cl eaner .

Scr ewed pl ug cl osur es usi ng t hr eaded connect i ons as al l owed bySect i on I of t he ASME Code are accept abl e means of access f ort hi s i nspect i on and cl eani ng. For boi l er s wi t h al l dr um

saf et y val ves set at or above 400 psi , socket - wel ded pl ugsmay be used f or t hi s pur pose i n l i eu of scr ewed pl ugs. Thewat er col umn shal l be f i t t ed wi t h a connect i on f or a dr ai ncock or dr ai n val ve t o i nst al l a pi pe of at l east 3/ 4 i n.pi pe si ze t o t he ash pi t or ot her saf e poi nt of di schar ge. I f t he water connect i on t o the water col umn has a r i si ng bend orpocket whi ch cannot be drai ned by means of t he wat er - col umndr ai n, an addi t i onal dr ai n shal l be pl aced on t hi s connect i oni n order t hat i t may be bl own of f t o cl ear any sedi ment f r omt he pi pe.



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The desi gn and mat er i al of a wat er col umn shal l compl y wi t ht he r equi r ement s of Sect i on I of t he ASME Code. Wat er col umnmade of cast i r on i n accor dance wi t h SA- 278 may be used f ormaxi mumboi l er pressures not exceedi ng 250 psi . Water col umnsmade of duct i l e i r on i n accor dance wi t h SA- 395 may be used f ormaxi mum boi l er pr essur e not exceedi ng 350 psi . For hi gherpr essur es, st eel const r uct i on shal l be used.

Shut of f val ves shal l not be used i n t he pi pe connect i onsbet ween a boi l er and a water col umn or bet ween a boi l er andt he shut of f val ves r equi r ed f or t he gage gl ass, unl ess t heyar e ei t her out si de- screw- and- yoke or l ever - l i f t i ng t ype gat eval ves or st opcocks wi t h l ever per manent l y f ast ened t heret oand mar ked i n l i ne wi t h t hei r passage, or of such othert hr ough- f l ow const r uct i on as t o pr event st oppage by deposi t sof sedi ment , and t o i ndi cat e by t he posi t i on of t he oper at i ngmechani sm whether t hey are i n open or cl osed posi t i on; andsuch val ves or cocks shal l be l ocked or seal ed open. Wherest op cocks ar e used, t hey shal l be of a t ype wi t h t he pl ug

hel d i n pl ace by a guard or gl and.

No out l et connect i ons, except f or cont r ol devi ces ( such asdamper r egul at ors and f eed- wat er r egul at ors ) , dr ai ns, st eamgages, or appar at us of such f orm as does not permi t t heescape of an appr eci abl e amount of st eam or water t heref r omshal l be pl aced on t he pi pes connect i ng a wat er col umn or gagegl ass t o a boi l er .

EBO-10 Gage Glass Connections Gage gl asses and gage cocks t hat are not connected di r ect l y t oa shel l or dr um of t he boi l er shal l be connect ed by one of t hef ol l owi ng methods:

( a) The water gage gl ass or gl asses and gage cocks shal l beconnect ed t o an i nterveni ng water col umn.

( b) When onl y wat er gage gl asses are used, t hey may bemounted away f r om t he shel l or drumand t he water col umnomi t t ed, pr ovi ded t he f ol l owi ng r equi r ement s ar e met :

( c) The t op and bot t om gage gl ass f i t t i ngs ar e al i gned,suppor t ed, and secur ed so as t o mai nt ai n t he al i gnment of t hegage gl ass; and

( d) The st eam and wat er connect i ons are not l ess t han 1 i n.pi pe si ze and each water gl ass i s pr ovi ded wi t h a val ved

dr ai n; and

( e) The st eam and water connect i ons compl y wi t h t her equi r ement s of t he f ol l owi ng:

The l ower edge of t he st eam connect i on t o a wat er col umn orgage gl ass i n t he boi l er shal l not be bel ow t he hi ghestvi si bl e wat er l evel i n t he wat er gage gl ass. Ther e shal l beno sag or of f set i n t he pi pi ng whi ch wi l l per mi t t heaccumul at i on of water ; and



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The upper edge of t he wat er connect i on t o a wat er col umn orgage gl ass and t he boi l er shal l not be above t he l owestvi si bl e wat er l evel i n t he gage gl ass. No par t of t hi s pi peconnect i on shal l be above t he poi nt of connect i on at t he wat ercol umn.

Each boi l er ( except t hose not r equi r i ng wat er l eveli ndi cat ors ) shal l have t hr ee or more gage cocks l ocat ed wi t hi nt he vi si bl e l engt h of t he wat er gl ass, except when t he boi l erhas t wo water gl asses l ocat ed on t he same hori zont al l i nes.

Boi l er s not over 36 i n. i n di amet er i n whi ch t he heat i ngsur f ace does not exceed 100 sq. f t . need have but t wo gagecocks.

The gage cock connect i ons shal l be not l ess t han 1/ 2 i n. pi pesi ze.

EBO-11 Pressure Gages

Each boi l er shal l have a pr essur e gage so l ocat ed t hat i t i seasi l y r eadabl e. The pr essur e gage shal l be i nst al l ed so t hati t shal l at al l t i mes i ndi cat e t he pr essur e i n t he boi l er .Each st eam boi l er shal l have t he pr essure gage connect ed t ot he steam space or t o the wat er col umn or i t s st eamconnect i on. A val ve or cock shal l be pl aced i n t he gageconnect i on adj acent t o t he gage. An addi t i onal val ve or cockmay be l ocat ed near t he boi l er pr ovi di ng i t i s l ocked orseal ed i n t he open posi t i on. No other shut of f val ves shal l bel ocat ed bet ween t he gage and t he boi l er . The pi pe connect i onshal l be of ampl e si ze and arr anged so that i t may be cl ear edby bl owi ng out . For a st eamboi l er t he gage or connect i onshal l cont ai n a si phon or equi val ent devi ce whi ch wi l l devel opand mai nt ai n a wat er seal t hat wi l l pr event st eam f r oment er i ng t he gage t ube. Pressur e gage connect i ons shal l besui t abl e f or t he maxi mum al l owabl e worki ng pr essur e andt emper ature, but i f t he t emper ature exceeds 406 degreesFahr enhei t , br ass or copper pi pe or t ubi ng shal l not be used.

The connect i ons t o t he boi l er , except t he si phon, i f used,shal l not be l ess t han 1/ 4 i n. i nsi de di amet er st andar d pi pesi ze but wher e st eel or wr ought - i r on pi pe or t ubi ng i s usedt hey shal l not be l ess t han 1/ 2 i n. The mi ni mum si ze of asi phon, i f used, shal l be 1/ 4 i n. i nsi de di amet er . Thedi al of t he pr essure gage shal l be gr aduat ed t o appr oxi matel ydoubl e t he pr essur e at whi ch t he saf et y val ve i s set , but i nno case t o l ess t han 1- 1/ 2 t i mes t hi s pr essure.

Each f orced- f l ow st eam gener ator wi t h no f i xed st eam and wat erl i ne shal l be equi pped wi t h pr essure gages or ot her pr essuremeasuri ng devi ces l ocat ed as f ol l ows:

( a) At t he boi l er or super - heat er out l et (f ol l owi ng t he l astsect i on whi ch i nvol ves absor pt i on of heat ) , and

( b) At t he boi l er or economi zer i nl et ( pr ecedi ng any sect i onwhi ch i nvol ves absor pt i on of heat ) , and



33

( c) Upst r eam of any shut of f val ve whi ch may be used bet weenany t wo sect i ons of t he heat absor bi ng sur f ace.

Each hi gh- t emper ature water boi l er shal l have a t emperat ur egage so l ocat ed and connect ed t hat i t shal l be easi l yr eadabl e. The t emper at ur e gage shal l be i nst al l ed so t hat i tat al l t i mes i ndi cat es t he t emper at ur e i n degr ees Fahr enhei tof t he wat er i n t he boi l er , at or near t he out l et connect i on.

EBO-12 Stop Valves

Each st eam out l et f r om a boi l er ( except saf et y val ve and wat ercol umn connect i ons) shal l be f i t t ed wi t h a st op val ve l ocat edas cl ose as pr act i cabl e t o t he boi l er .

When a st op val ve i s so l ocated t hat water can accumul ate,ampl e dr ai ns shal l be pr ovi ded. The dr ai nage shal l be pi pedt o a saf e l ocat i on and shal l not be di schar ged on t he t op of t he boi l er or i t s set t i ng.

When boi l ers provi ded wi t h manhol es are connect ed t o a commonst eam mai n, t he st eam connect ed f r om each boi l er shal l bef i t t ed wi t h t wo st op val ves havi ng an ampl e f r ee bl ow dr ai nbet ween t hem. The di schar ge of t he dr ai n shal l be vi si bl e t ot he oper ator whi l e mani pul at i ng t he val ves and shal l be pi pedcl ear of t he boi l er set t i ng. The st op val ves shal l consi stpr ef erabl y of one aut omat i c non- r et ur n val ve ( set next t o t heboi l er) and a second val ve of t he out si descr ew- and- yoke t ype.

EBO-13 Blow-off Piping

A bl ow- of f as requi r ed her ei n i s def i ned as a pi pe connect i onpr ovi ded wi t h val ves l ocat ed i n t he external pi pi ng t hr oughwhi ch the water i n t he boi l er may be bl own out under pressure,except i ng drai ns such as are used on water col umns, gagegl asses, or pi pi ng t o f eed- wat er r egul at or s, et c. , used f ort he pur pose of det er mi ni ng t he oper at i ng condi t i on of suchequi pment . Pi pi ng connect i ons used pr i mar i l y f or cont i nuousoperat i on, such as de- concent r ators on cont i nuous bl ow- downsyst ems, are not cl assed as bl ow- of f ’ s but t he pi pe connect i onsand al l f i t t i ngs up t o and i ncl udi ng t he f i r st shut of f val veshal l be equal at l east t o t he pr essur e r equi r ement s f or t hel owest set pressure of any saf et y val ve on t he boi l er dr um andwi t h t he cor r espondi ng sat ur ated- st eam t emperat ur e.

A sur f ace bl ow- of f shal l not exceed 2- 1/ 2 i n. pi pe si ze, andt he i nt er nal pi pe and t he t er mi nal connect i on f or t he externalpi pe, when used, shal l f orm a cont i nuos passage, but wi t h

cl ear ance bet ween t hei r ends and arr anged so t hat t he r emovalof ei t her wi l l not di st ur b t he ot her . A pr oper l y desi gnedst eel bushi ng, si mi l ar t o or t he equi val ent of t hose shown i nFi g. PG- 59. 1 of Sect i on I of t he ASME Code or a f l angedconnect i on shal l be used.

Each boi l er except f or ced- f l ow st eam gener at or s wi t h no f i xedst eam and wat erl i ne and hi gh- t emper at ur e water boi l ers shal lhave a bot t om bl ow- of f out l et i n di r ect connect i on wi t h t hel owest water space pr act i cabl e f or ext er nal pi pi ng conf ormi ng



34

t o PG- 58. 3. 6 of Sect i on I of t he ASME Code.

Al l wat er wal l s and wat er scr eens whi ch do not dr ai n back i nt ot he boi l er , and al l i nt egr al economi zer s, shal l be equi ppedwi t h out l et connect i ons f or a bl ow- of f or dr ai n l i ne andconf orm t o t he requi r ement s of PG- 58. 3. 7 of t he ASME Code.

Except as per mi t t ed f or mi ni at ur e boi l er s, t he mi ni mum si zeof pi pe and f i t t i ngs shal l be 1 i n. , and t he maxi mum si zeshal l be 2- 1/ 2 i n. , except t hat f or boi l er s wi t h 100 sq. f t .of heat i ng sur f ace or l ess, t he mi ni mum si ze of pi pe andf i t t i ngs may be 3/ 4 i n.

Condensat e r etur n connect i ons of t he same si ze or l arger t hant he si ze her ei n speci f i ed may be used, and t he bl ow- of f may beconnect ed t o t hem. I n such case t he bl ow- of f shal l be sol ocat ed t hat t he connect i on may be compl etel y dr ai ned.

A bot t om bl ow- of f pi pe when exposed t o di r ect f ur nace heatshal l be pr ot ect ed by f i r ebr i ck or ot her heat r esi st i ng

mater i al whi ch i s so ar r anged t hat t he pi pe may be i nspected.

An openi ng i n t he boi l er set t i ng f or a bl ow- of f pi pe shal l bear r anged t o pr ovi de f r ee expansi on and cont r act i on.

EBO-14 Repairs and Renewals of Boiler Fittings and Appliances

Whenever r epai r s are made t o f i t t i ngs or appl i ances or i tbecomes necessar y t o r epl ace t hem, t he work shal l compl y wi t ht he r equi r ement s f or new i nst al l at i ons.

EBO-15 Conditions Not Covered By These Requirements

Al l cases not speci f i cal l y cover ed by t hese requi r ement s shal lbe t r eat ed as new i nst al l at i ons or may be r ef er r ed t o t heChi ef I nspect or f or i nst r uct i ons concer ni ng t he r equi r ement s.

SECTION 2 - HEATING BOILERS

EHB-1 Standard Boilers

The maxi mum al l owabl e wor ki ng pressure of st andard boi l er sshal l i n no case exceed the pr essure i ndi cat ed by t hemanuf act ur er ' s i dent i f i cat i on st amped or cast on t he boi l er oron a pl at e secur ed t o i t .

EHB-2 Nonstandard Riveted Boilers

The maxi mum al l owabl e wor ki ng pressure on t he shel l of anonst andar d r i vet ed heat i ng boi l er shal l be det er mi ned i naccor dance wi t h EBO- 3 of Par t I I I , Power Boi l er s, exceptt hat i n no case shal l t he maxi mum al l owabl e worki ng pr essur eof a st eam heat i ng boi l er exceed 15 psi , or a hot wat erboi l er exceed 160 psi or 250 degr ees Fahr enhei t t emperatur e.

EHB-3 Nonstandard Welded Boilers



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The maxi mum al l owabl e wor ki ng pressure of a nonst andard st eelor wr ought i r on heat i ng boi l er of wel ded const r uct i on shal lnot exceed 15 psi f or st eam. For ot her than st eam servi ce,t he maxi mum al l owabl e worki ng pr essur e shal l be cal cul at ed i naccordance wi t h Sect i on I V of t he ASME Code, but i n no caseshal l i t exceed 30 psi .

EHB-4 Nonstandard Cast Iron Boilers

The maxi mum al l owabl e wor ki ng pressure of a nonst andar d boi l ercomposed pr i nci pal l y of cast i r on shal l not exceed 15 psi f orst eam ser vi ce of 30 psi f or hot wat er ser vi ce.

The maxi mum al l owabl e wor ki ng pressure of a nonst andar d boi l erhavi ng cast i r on shel l or heads and st eel or wr ought i r ont ubes shal l not exceed 15 psi f or st eam ser vi ce of 30 psi f orhot wat er servi ce.

EHB-5 Potable Water Heaters

A potabl e wat er heat er shal l not be i nst al l ed or used as a

heat i ng boi l er .

EHB-6 Safety Valves ( a) Each st eam boi l er shal l have one or more ASME/ Nat i onalBoar d cer t i f i ed and st amped saf et y val ves of t he spr i ngpop- t ype adj ust ed and seal ed t o di schar ge at a pr essure not t oexceed 15 psi . Seal s shal l be at t ached i n a manner t o pr eventt he val ve f r ombei ng t aken apar t wi t hout br eaki ng t he seal .

The saf et y val ves shal l be ar r anged so t hat t hey cannot ber eset t o r el i eve at a hi gher pr essur e t han t he maxi mumal l owabl e worki ng pr essure on t he boi l er . A body dr ai nconnect i on bel ow seat l evel shal l be pr ovi ded by t hemanuf act ur er and t hi s dr ai n shal l not be pl ugged dur i ng oraf t er f i el d i nspect i on. For val ves exceedi ng 2 i n. pi pesi ze, t he dr ai n hol e or hol es shal l be t apped not l ess t han3/ 8 i n. pi pe si ze. For val ves l ess t han 2 i n. , t he dr ai nhol e shal l not be l ess t han 1/ 4 i n. i n di amet er .

( b) No saf et y val ve f or a st eam boi l er shal l be smal l er t han1/ 2 i n. No saf et y val ve shal l be l ar ger t han 4- 1/ 2 i n. Thei nl et openi ng shal l have an i nsi de di amet er equal t o, orgr eat er t han, t he seat di ameter .

( c) The mi ni mum r el i evi ng capaci t y of t he val ve or val vesshal l be gover ned by t he capaci t y marki ng on t he boi l er.

( d) The mi ni mum val ve capaci t y i n pounds per hour shal l be the

great er of t hat det ermi ned by di vi di ng t he maxi mumBTU out putat t he boi l er nozzl e obt ai ned by t he f i r i ng of any f uel f orwhi ch t he uni t i s i nst al l ed by 1000, or shal l be det er mi nedon t he basi s of t he pounds of st eam generat ed per hour persquar e f oot of boi l er heat i ng sur f ace as gi ven i n Tabl e EHB- 6i n t ext. I n many cases a gr eat er r el i evi ng capaci t y of val vest han t he mi ni mum speci f i ed by t hese r ul es wi l l have t o bepr ovi ded. I n ever y case, t he r equi r ement s shal l be met .

TABLE EHB-6



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MI NI MUM POUNDS OF STEAM PER HOUR

PER SQUARE FOOT OF HEATI NG SURFACE

Fi r etube Watert ubeBoi l ers Boi l ers

Boi l er Heat i ng Sur f ace:Hand Fi r ed 5 6St oker f i r ed 7 8Oi l , gas or pul ver i zed f uelf i r ed 8 10

Waterwal l Heat i ng Surf ace:Hand f i r ed 8 8St oker f i r ed 10 12Oi l , gas or pul ver i zed f uelf i r ed 14 16

( 1) When a boi l er i s f i r ed onl y by a gas gi vi ng a heat val uenot i n excess of 200 BTU per cu. f t . , t he mi ni mum saf et yval ve or saf et y r el i ef val ve r el i evi ng capaci t y may be basedon the val ue gi ven f or hand- f i r ed boi l er s above.

( 2) The mi ni mum saf et y val ve or saf et y r el i ef val ve r el i evi ngcapaci t y f or el ect r i c boi l er s shal l be 3- 1/ 2 pounds per hourper ki l owat t i nput .

( 3) For heat i ng sur f ace determi nat i on see ASME Code Sect i onI V. par agr aph HG- 403.

( e) The saf et y val ve capaci t y f or each st eam boi l er shal l besuch t hat wi t h t he f uel bur ni ng equi pment i nst al l ed, andoperat i ng at maxi mumcapaci t y, t he pr essur e cannot ri se moret han 5 psi above t he maxi mumal l owabl e worki ng pressure.

( f ) When oper at i ng condi t i ons are changed, or addi t i onalboi l er heat i ng sur f ace i s i nst al l ed, t he val ve capaci t y shal lbe i ncr eased, i f necessary, t o meet the new condi t i ons andbe i n accordance wi t h EHB- 6( e) i n t ext . When addi t i onalval ves ar e r equi r ed, t hey may be i nst al l ed on t he out l etpi pi ng pr ovi ded t her e i s no i nt er veni ng val ve.

( g) I f t her e i s any doubt as t o t he capaci t y of t he saf et yval ve, an accumul at i on t est shal l be r un. ( See ASME Code,Sect i on VI , Recommended Rul es f or Care and Oper at i on of

Heat i ng Boi l er s. )

( h) No val ve of any descri pt i on shal l be pl aced bet ween t hesaf et y val ve and t he boi l er , nor on t he di schar ge pi pebetween t he saf et y val ve and t he at mosphere. THE DI SCHARGEPI PE SHALL BE AT LEAST FULL SI ZE AND BE FI TTED WI TH AN OPENDRAI N TO PREVENT WATER LODGI NG I N THE UPPER PART OF THE SAFETYVALVE OR I N THE DI SCHARGE PI PE. When an el bow i s pl aced ont he saf et y val ve di schar ge pi pe, i t shal l be l ocat ed cl ose t ot he saf et y val ve out l et or t he di schar ge pi pe shal l be



37

secur el y anchored and support ed. Al l saf et y val ve di schargesshal l be so l ocat ed or pi ped as not t o endanger personsworki ng i n t he ar ea.

EHB-7 Safety Relief Valve Requirements for Hot Water Heatingand Hot Water Supply Boilers

( a) Each hot wat er heat i ng and hot wat er suppl y boi l er shal lhave at l east one ASME/ Nat i onal Boar d st amped and cert i f i edsaf et y r el i ef val ve set t o r el i eve at or bel ow t he maxi mumal l owabl e worki ng pressure of t he boi l er . Each hot wat ersuppl y boi l er shal l have at l east one ASME/ Nat i onal Boar dst amped and cer t i f i ed saf et y r el i ef val ve of t he aut omat i cr eseat i ng t ype set t o r el i eve at or bel ow maxi mum al l owabl ewor ki ng pr essur e of t he boi l er . Saf et y r el i ef val vesASME/ Nat i onal Boar d st amped and cert i f i ed as to capaci t y shal lhave pop act i on when t est ed by st eam. When mor e t han onesaf et y rel i ef val ve i s used on ei t her hot wat er heat i ng or hotwat er suppl y boi l er , t he addi t i onal val ve or val ves shal l beASME r at ed and may be set wi t hi n a r ange not t o exceed 6 psi

above t he maxi mum al l owabl e worki ng pr essur e of t he boi l er upt o and i ncl udi ng 60 psi and 5 per cent f or t hose havi ng amaxi mum al l owabl e worki ng pr essur e exceedi ng 60 psi . Saf etyr el i ef val ves shal l be spr i ng l oaded. Saf et y r el i ef val vesshal l be so arr anged t hat t hey cannot be r eset at a hi gherpressure t han t he maxi mumper mi t t ed by t hi s par agr aph.

( b) No mat er i al s l i abl e t o f ai l due t o det er i or at i on orvul cani zat i on when subj ect t o satur ated st eam t emper atur ecor r espondi ng t o capaci t y t est pr essure shal l be used f or anypart.

( c) No saf et y r el i ef val ve shal l be smal l er t han 3/ 4 i n. norl ar ger t han 4- 1/ 2 i n. st andar d pi pe si ze, except t hatboi l ers havi ng a heat i nput not gr eat er t han 15, 000 BTU perhour may be equi pped wi t h a saf ety r el i ef val ve of 1/ 2 i n.

st andar d pi pe si ze. The i nl et openi ng shal l have an i nsi dedi ameter appr oxi mat el y equal t o, or gr eat er t han, t he seatdi ameter. I n no case shal l t he mi ni mum openi ng t hr ough anypar t of t he val ve be l ess t han 1/ 4 i n. i n di amet er or i t sequi val ent ar ea.

( d) The r equi r ed st eam r el i evi ng capaci t y, i n pounds perhour , of t he pr essur e r el i evi ng devi ce or devi ces on a boi l ershal l be t he gr eat er of t hat det er mi ned by di vi di ng t he

maxi mum out put i n BTU at t he boi l er nozzl e obt ai ned by t hef i r i ng of any f uel f or whi ch t he uni t i s i nst al l ed by 1, 000 orshal l be determi ned on t he basi s of pounds of st eam generatedper hour per squar e f oot of boi l er heat i ng sur f ace as gi ven i n

Tabl e EHB- 6. I n many cases a greater r el i evi ng capaci t y of val ves wi l l have t o be pr ovi ded t han t he mi ni mum speci f i ed byt hese r ul es. I n ever y case, t he r equi r ement s of EHB- 7 ( f )shal l be met .

( e) When oper at i ng condi t i ons are changed, or addi t i onal



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boi l er heat i ng sur f ace i s i nst al l ed, t he val ve capaci t y shal lbe i ncr eased, i f necessary, t o meet the new condi t i ons andshal l be i n accor dance wi t h EHB- 7 ( f ) . The addi t i onal val vesr equi r ed, on account of changed condi t i ons, may be i nst al l edon t he out l et pi pi ng pr ovi ded t her e i s no i nt er veni ng val ve.

( f ) Saf et y rel i ef val ve capaci t y f or each boi l er shal l be sucht hat , wi t h t he f uel bur ni ng equi pment i nst al l ed and oper at edat maxi mum capaci t y, t he pressur e cannot r i se more t han 10per cent above t he maxi mumal l owabl e worki ng pressure f orpr essur e. When more t han one saf ety r el i ef val ve i s used,t he over pr essure shal l be l i mi t ed to 10 per cent above the setpr essure of t he hi ghest set val ve al l owed by EHB- 6( a) i n t ext .

( g) I f t her e i s any doubt as t o t he capaci t y of t he saf et yr el i ef val ve, an accumul at i on t est shal l be r un. ( See ASMECode, Sect i on VI , Recommended Rul es f or Care and Oper at i onof Heat i ng Boi l er s. )

( h) No val ve of any descri pt i on shal l be pl aced bet ween t he

saf et y r el i ef val ve and t he boi l er , nor on t he di schar ge pi pebetween t he saf ety r el i ef val ve and t he atmosphere. THE

DISCHARGE PIPE SHALL BE NOT LESS THAN THE DIAMETER OF THE

SAFETY RELIEF VALVE AND FITTED WITH AN OPEN DRAIN TO PREVENT

WATER LODGING IN THE UPPER PART OF THE SAFETY RELIEF VALVE OR

IN THE DISCHARGE PIPE. When an el bow i s pl aced on t he saf etyr el i ef val ve di schar ge pi pe, i t shal l be l ocat ed cl ose t o t hesaf et y r el i ef val ve out l et or t he di schar ge pi pe shal l besecur el y anchored and suppor t ed. Al l saf et y r el i ef val vedi schar ges shal l be so l ocat ed or pi ped as not t o endangerpersons worki ng i n t he ar ea.

EHB-8 Steam Gages

Each st eam boi l er shal l have a st eam gage or a compound st eamgage connect ed to i t s st eam space or t o i t s wat er col umn or t oi t s st eam connect i on. The gage or connect i on shal l cont ai n a

si phon or equi val ent devi ce whi ch wi l l devel op and mai nt ai n awat er seal t hat wi l l pr event st eam f r om ent er i ng t he gaget ube. The connect i on shal l be so arr anged t hat t he gagecannot be shut of f f r om t he boi l er except by a cock pl aced i nt he pi pe at t he gage and pr ovi ded wi t h a t ee or l ever handl ear r anged t o be par al l el t o t he pi pe i n whi ch i t i s l ocat edwhen t he cock i s open. The connect i ons t o t he boi l er shal l benot l ess t han 1/ 4 i n. st andar d pi pe si ze, but wher e st eel orwr ought i r on pi pe or t ubi ng i s used, t hey shal l be not l ess

t han 1/ 2 i n. st andar d pi pe si ze. The mi ni mum si ze of asi phon, i f used, shal l be 1/ 4 i n. i n i nsi de di amet er .Fer r ous and nonf er r ous t ubi ng havi ng i nsi de di ameter s at l eastequal t o t hat of st andar d pi pe si zes l i st ed above may besubst i t ut ed f or pi pe.

The scal e on t he di al of a st eam boi l er gage shal l begr aduat ed t o not l ess t han 30 psi nor more t han 60 psi . Thet r avel of t he poi nt er f r om 0 t o 30 psi pr essur e shal l be atl east 3 i n.



39

EHB-9 Pressure or Altitude Gages and Thermometers

Each hot wat er boi l er shal l have a pr essur e or al t i t ude gageconnect ed t o i t or to i t s f l ow connect i on i n such a mannert hat i t cannot be shut of f f r om t he boi l er except by a cockwi t h t ee or l ever handl e, pl aced on t he pi pe near t he gage.

The handl e of t he cock shal l be paral l el t o t he pi pe i n whi chi t i s l ocated when t he cock i s open.

The scal e on t he di al of t he pressure or al t i t ude gage shal lbe graduated appr oxi matel y t o not l ess t han 1- 1/ 2 nor moret han three t i mes t he pr essur e at whi ch t he saf et y rel i ef val vei s set .

Pi pi ng or t ubi ng f or pr essur e- or al t i t ude- gage connect i onsshal l be of nonf er r ous met al when smal l er t han 1 i n. pi pesi ze.

Each hot water boi l er shal l have a t hermometer so l ocat ed and

connect ed t hat i t shal l be easi l y r eadabl e when observi ng t hewat er pr essur e or al t i t ude. The t hermometer shal l be sol ocat ed t hat i t shal l at al l t i mes i ndi cat e t he t emper at ur e i ndegr ees Fahr enhei t of t he water i n t he boi l er at or near t heout l et .

EHB-10 Water Gage Glasses

Each st eam boi l er shal l have one or more water gage gl assesat t ached t o t he water col umn or boi l er by means of val vedf i t t i ngs not l ess t hat 1/ 2 i n. pi pe si ze, wi t h t he l owerf i t t i ng provi ded wi t h a dr ai n val ve of a t ype havi ng anunr est r i ct ed dr ai n openi ng not l ess t han 1/ 4 i n. i n di amet ert o f aci l i t at e cl eani ng. Gage gl ass repl acement shal l bepossi bl e under pr essur e. Wat er gl ass f i t t i ngs may beat t ached di r ectl y to a boi l er .

Boi l er s havi ng an i nt er nal ver t i cal hei ght of l ess t han 10 i n.may be equi pped wi t h a water l evel i ndi cator of t he Gl assBul l ' s- Eye t ype pr ovi ded t he i ndi cat or i s of suf f i ci ent si zet o show t he water at bot h nor mal operat i ng and l ow watercut of f l evel s.

The l owest vi si bl e part of t he wat er gage gl ass shal l be atl east 1 i n. above t he l owest permi ssi bl e wat er l evelr ecommended by t he boi l er manuf act urer . Wi t h t he boi l eroper at i ng at t hi s l owest per mi ssi bl e wat er l evel , t her e shal l

be no danger of over heat i ng any part of t he boi l er .

Each boi l er shal l be pr ovi ded at t he t i me of t he manuf act ur ewi t h a per manent marker i ndi cat i ng t he l owest permi ssi bl ewater l evel . The marker shal l be st amped, etched, or casti n met al ; or i t shal l be a met al l i c pl at e at t ached by r i vet s,scr ews, or wel di ng; or i t shal l consi st of mat er i al wi t hdocument ed t est s showi ng i t s sui t abi l i t y as a permanentmar ki ng f or the appl i cat i on. Thi s mar ker shal l be vi si bl e atal l t i mes. Wher e t he boi l er i s shi pped wi t h a j acket , t hi s



40

marker may be l ocat ed on t he j acket .

I n el ect r i c boi l er s of t he submer ged el ect r ode t ype, t hewat er gage shal l be so l ocated t o i ndi cat e t he wat er l evel sboth at st art up and under maxi mumst eal l oad condi t i ons asest abl i shed by t he manuf actur er.

I n el ect r i c boi l er s of t he r esi st ance heat i ng el ement t ype thel owest vi si bl e par t of t he wat er gage gl ass shal l not be bel owt he t op of t he el ect r i c r esi st ance heat i ng el ement . Eachboi l er of t hi s t ype shal l al so be equi pped wi t h an aut omat i cl ow- wat er el ect r i cal power cut of f so l ocat ed as t oaut omat i cal l y cut of f t he power suppl y bef ore t he surf ace of t he wat er f al l s bel ow t he t op of t he el ect r i cal r esi st anceheat i ng el ement s.

Tubul ar wat er gl asses on el ect r i c boi l er s havi ng a normalwater cont ent not exceedi ng 100 gal . shal l be equi pped wi t h apr ot ecti ve shi el d.

EHB-11 Stop Valves

When a st op val ve i s used i n t he suppl y pi pe connect i on of asi ngl e st eam boi l er , t her e shal l be one used i n t he r et ur npi pe connect i on.

St op val ves i n si ngl e hot wat er heat i ng boi l er s shal l bel ocat ed at an accessi bl e poi nt i n t he suppl y and r et ur n pi peconnect i ons as near t he boi l er nozzl e as i s conveni ent andpr act i cabl e, of a si ngl e hot wat er heat i ng boi l eri nst al l at i on t o per mi t dr ai ni ng t he boi l er wi t hout empt yi ngt he syst em.

When t he boi l er i s l ocat ed above the syst emand can be dr ai nedwi t hout dr ai ni ng t he syst em, st op val ves may be el i mi nated.A st op val ve shal l be used i n each suppl y and r eturn pi peconnect i on of t wo or more boi l ers connect ed t o a commonsyst em.

Al l val ves or cocks shal l conf or m wi t h t he appl i cabl e por t i onsof HF- 203 of Sect i on I V of t he ASME Code and may be f er r ous ornonf err ous.

The mi ni mum pressure r at i ng of al l val ves or cocks shal l be atl east equal t o t he pr essur e st amped upon t he boi l er, and t het emper at ur e r at i ng of such val ves or cocks, i ncl udi ng al li nt ernal component s shal l be not l ess t han 250 degr ees

Fahr enhei t .

Val ves or cocks shal l be f l anged, t hr eaded or have endssui t abl e f or wel di ng or br azi ng.

Al l val ves or cocks wi t h st ems or spi ndl es shal l haveadj ust abl e pr essur e t ype packi ng gl ands and, i n addi t i on,al l pl ug t ype cocks shal l be equi pped wi t h a guar d or gl and.

The pl ug or ot her operat i ng mechani sm shal l be di st i nct l ymar ked i n l i ne wi t h t he passage t o i ndi cat e whet her i t i s



41

opened or cl osed.

Al l val ves or cocks shal l have t i ght cl osur e when under boi l erhydr ost at i c t est pr essur e.

When st op val ves are used, t hey shal l be proper l y desi gnat edsubst ant i al l y by t ags of met al or other dur abl e mat er i alf ast ened t o t hem as f ol l ows:

Suppl y Val ve - Number ( )

Do Not Cl ose Wi t hout Al so Cl osi ng Retur n Val ve -Number ( )

Ret urn Val ve - Number ( )

Do Not Cl ose Wi t hout Al so Cl osi ng Suppl y Val ve -Number ( )

EHB-12 Feed-water Connections

Feed- water , makeup water, or water t r eat ment shal l bei nt r oduced i nt o a boi l er t hr ough t he r et ur n pi pi ng system.Al t ernat i vel y, makeup water or wat er t r eat ment may bei nt r oduced t hr ough an i ndependent connect i on. The water f l owf r om t he i ndependent connect i on shal l not di schar ge di r ect l yagai nst par t s of t he boi l er exposed t o di r ect r adi ant heatf r om t he f i r e. Makeup wat er or wat er t r eat ment shal l not bei nt r oduced t hr ough openi ngs or connect i ons pr ovi ded f ori nspecti on or cl eani ng, saf et y val ve, saf et y r el i ef val ve,bl ow- of f , wat er col umn, wat er gage gl ass, pr essur e gage, ort emperat ure gage.

The makeup wat er pi pe shal l be provi ded wi t h a check val venear t he boi l er and a st op val ve or cock bet ween t he checkval ve and the boi l er or between t he check val ve and t he ret ur npi pe syst em.

EHB-13 Water Column and Water Level Control Pipes

The mi ni mum si ze of f er r ous or nonf er r ous pi pes connect i ng awat er col umn t o a st eam boi l er shal l be 1 i n. No out l etconnect i ons, except f or damper r egul at or, f eed- wat err egul at or, st eam gages, or apparat us whi ch does not permi tt he escape of any st eam or water except f or manual l y operatedbl ow- downs, shal l be at t ached t o a water col umn or t he pi pi ngconnect i ng a water col umn t o a boi l er ( see HG- 705 of Sect i on

I V of t he ASME Code f or i nt r oduct i on of f eed- wat er i nt o aboi l er ) . I f t he wat er col umn, gage gl ass, l ow- wat er f uelcut of f , or ot her wat er l evel cont r ol devi ce i s connect ed t ot he boi l er by pi pe and f i t t i ngs, no shut of f val ves of anyt ype shal l be pl aced i n such pi pe, and a cr oss or equi val entf i t t i ng t o whi ch a dr ai n val ve and pi pi ng may be at t achedshal l be pl aced i n t he wat er pi pi ng connect i on at ever y r i ghtangl e t ur n t o f aci l i t at e cl eani ng. The wat er col umn dr ai npi pe and val ve shal l be not l ess t han 3/ 4 i n. pi pe si ze.



42

The st eam connect i ons t o t he wat er col umn of a hor i zont alFi r e- t ube wr ought boi l er shal l be t aken f r om t he t op of t heshel l or t he upper par t of t he head, and t he water connect i onshal l be t aken f r om a poi nt not above t he cent er l i ne of t heshel l . For a cast i r on boi l er , t he st eam connecti on t o t hewater col umn shal l be t aken f r om t he t op of an end sect i on ort he t op of t he st eamheader , and t he wat er connect i on shal lbe made on an end sect i on not l ess t han 6 i n. bel ow t hebott omconnect i on t o t he wat er gage gl ass.

EHB-14 Return Pump

Each boi l er equi pped wi t h a condensat e r etur n pump shal l bepr ovi ded wi t h a wat er l evel cont r ol ar r anged t o aut omat i cal l ymai nt ai n t he wat er l evel i n t he boi l er wi t hi n t he r ange of t hegage gl ass.

EHB-15 Repairs and Renewals of Fittings and Appliances

Whenever r epai r s ar e made t o f i t t i ngs or appl i ances, or i t

becomes necessar y t o r epl ace t hem, t he r epai r s must compl ywi t h Sect i on I V of t he ASME Code f or new const r uct i on.

SECTION 3 - PRESSURE VESSELS

EPV-1 Maximum Allowable Working Pressure for Standard Pressure Vessels

The maxi mum al l owabl e wor ki ng pressure f or st andard pressurevessel s shal l be deter mi ned i n accor dance wi t h t he appl i cabl epr ovi si ons of t he edi t i on of t he ASME Code or t he API - ASMECode under whi ch t hey wer e const r uct ed and st amped.

EPV-2 Maximum Allowable Working Pressure for Nonstandard Pressure Vessels, Except as Provided in EPV-3

( a) The maxi mumal l owabl e worki ng pressure of a nonst andar dpr essure vessel shal l be deter mi ned by t he st r engt h of t heweakest cour se comput ed f r omt he t hi ckness of t he pl at e, t het ensi l e st r engt h of t he pl at e, t he ef f i ci ency of t hel ongi t udi nal j oi nt , t he i nsi de di amet er of t he cour se and t hef act or of saf et y set by these r ul es.

TStE = maxi mum al l owabl e wor ki ng pressure, psiDDDDRFS

wher e:

TS = speci f i ed mi ni mum t ensi l e st r engt h of shel l pl at emat er i al , psi . ( When t he t ensi l e st r engt h of car bon st eelpl ate i s not known, i t may be t aken as 55, 000 psi f ort emper atures not exceedi ng 650 degrees Fahr enhei t . For ot hermat er i al s use t he l owest st r ess val ues f or t hat mat er i al f r omSect i on VI I I . )t = mi ni mum t hi ckness of shel l pl at e of weakest cour se,i nches



43

E = ef f i ci ency of l ongi t udi nal j oi nt dependi ng uponconst r uct i on.

Use t he f ol l owi ng val ues:

f or r i vet ed j oi nt s - cal cul at ed r i vet ed ef f i c i ency; f orf usi on- wel ded and br azed j oi nt s - t he f ol l owi ng per cent agesappl y:

PERCENTSi ngl e l ap wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40%

Doubl e l ap wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50%

Si ngl e but t wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60%

Doubl e but t wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70%

For ge wel d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70%

Br azed st eel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80% R = i nsi de r adi us of weakest cour se of shel l , ( i nches)pr ovi ded t he t hi ckness does not exceed 10 percent of t her adi us. I f t he t hi ckness i s over 10 per cent of the r adi us,t he out er r adi us shal l be used.

FS = f act or of saf et y al l owed by these rul es.

( b) The mi ni mum f act or of saf et y i n no case be l ess t han 5 f orexi st i ng i nst al l at i ons. The wor ki ng pr essur e shal l bedecr eased when deemed necessar y by the i nspect or t o i nsur e t heoper at i on of t he vessel wi t hi n saf e l i mi t s. The condi t i on of t he vessel and t he par t i cul ar ser vi ce t o whi ch i t i s subj ectwi l l be t he det er mi ni ng f act ors.

( c) The maxi mum al l owabl e worki ng pressur e permi t t ed f orf ormed heads under pressure shal l be det ermi ned by usi ng t heappr opr i at e f or mul as f r omASME Code Sect i on VI I I , Di vi si on 1,and t he t ensi l e st r engt h and f act or s of saf et y gi ven i npar agr aphs EPV- 1 and EPV- 2(a) ( b) .

( d) The maxi mum al l owabl e worki ng pr essur e f or nonst andardpr essur e vessel s subj ect ed t o external pr essur e shal l bedet er mi ned by t he r ul es of Sect i on VI I I , Di vi si on 1, of t heASME Code.

EPV-3 Nonstandard Pressure Vessels - Use of Other Formulas

Pressure vessel s t hat were not ASME Code st amped but whi chwere const r uct ed of known mat er i al s and were desi gned andconst r uct ed i n accor dance wi t h sound engi neeri ng st andards,f or mul as, and pr act i ces that pr ovi de saf et y equi val ent t o t hei nt ent of t he Code shal l be cal cul at ed on t he same basi s asused i n t he or i gi nal desi gn.

EPV-4 Inspection of Inaccessible Parts



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Wher e, i n t he opi ni on of t he i nspect or , as t he r esul t of condi t i ons di scl osed at t he t i me of i nspect i on, i t may benecessar y t o r emove i nt er i or or ext er i or l i ni ng, cover i ng orbr i ckwork t o expose cer t ai n par t s of t he vessel not normal l yvi si bl e, t he owner or user shal l r emove such mat er i al t opermi t pr oper i nspect i on and t o determi ne r emai ni ng t hi ckness.

EPV-5 Overpressure Protection

Each pr essure vessel shal l be pr ovi ded wi t h pr essure r el i ef devi ces i ndi cat i ng and cont r ol l i ng devi ces as necessar y t opr otect agai nst over pr essure. These devi ces shal l be soconst r uct ed, l ocat ed and i nst al l ed t hat t hey cannot r eadi l ybe render ed i noper at i ve. The r el i evi ng capaci t y of suchpr essur e r el i ef devi ce shal l be adequat e t o pr event a r i se i npr essur e i n t he vessel of more t han 10 percent or 3 psi ,whi chever i s gr eat er, above t he maxi mum al l owabl e worki ngpr essure except when mul t i pl e r el i evi ng devi ces ar e pr ovi ded,t hey shal l pr event t he pr essur e f r om r i si ng mor e t han 16

percent or 4 psi , whi chever i s gr eat er above t he maxi mumal l owabl e worki ng pr essure. When mul t i pl e pr essure r el i evi ngdevi ces ar e pr ovi ded, at l east one devi ce shal l be set at orbel ow t he maxi mum al l owabl e worki ng pressure and t headdi t i onal devi ces shal l be set no hi gher t hen 105% of t hemaxi mum al l owabl e worki ng pressure. Wher e an addi t i onalhazard i s i nvol ved due t o f i r e or other unexpect ed sour ces of exter nal heat , t he pr essur e r el i ef devi ces shal l meet t her equi r ement s of ASME Code Sect i on VI I I , Di vi si on 1,par agr aph UG- 125 or Di vi si on 2, par agr aph AR- 130, whi cheveri s appl i cabl e.EPV-6 Repairs and Renewals of Fittings and Appliances

Whenever r epai r s ar e made t o f i t t i ngs and appur t enances or i tbecomes necessary t o r epl ace t hem, t he work must compl y wi t ht he r equi r ement s f or new i nst al l at i ons.

PART IV

GENERAL REQUIREMENTS

GR-1 Inspection of Boilers and Pressure Vessels

Al l boi l ers and pr essur e vessel s not exempt ed by t he Act or byr ul es and r egul at i ons pr omul gated under t he Act and whi ch aresubj ect t o r egul ar i nspect i ons, shal l be pr epar ed f or suchi nspect i ons as r equi r ed i n GR- 2.

GR-2 Preparation for Inspection The owner or user shal l prepar e each boi l er or pressure vesself or i nspect i on, and shal l pr epar e f or and appl y a hydr ost at i cor pressur e t est , whenever necessar y, on t he date arr angedby t he i nspect or whi ch shal l not be l ess t han seven ( 7) daysaf t er t he dat e of not i f i cat i on.

( a) Boi l er s - The owner or user shal l pr epar e a boi l er f or



45

i nt er nal i nspect i on i n t he f ol l owi ng manner :

( 1) Water shal l be drawn of f and t he boi l er washed t hor oughl y;

( 2) Manhol e and handhol e pl ates, washout pl ugs and i nspect i onpl ugs i n water col umn connect i ons shal l be removed as r equi r edby t he i nspect or . The f urnace and combust i on chamber s shal lbe cool ed and t hor oughl y cl eaned;

( 3) Al l gr at es of i nt er nal l y f i r ed boi l er s shal l be r emoved;

( 4) I nsul at i on or br i ckwork shal l be r emoved as r equi r ed byt he i nspect or i n or der t o det er mi ne t he condi t i on of t heboi l er , header s, f ur nace, suppor t s or ot her par t s;

( 5) Pr i or t o t he i nspect i on, t he owner / user shal l make anyand al l pr epar at i ons wi t h r egar ds t o asbest os cont ai ni ngmat er i al s whi ch ar e necessary t o pr ovi de pr oper access t oequi pment and t o cont r ol exposur e t o asbest os f i ber s dur i ngt he i nspect i on. The r equi r ed pr eparat ory work shal l be

conducted i n accor dance wi t h t he pr ovi si ons of t he RhodeI sl and Rul es and Regul at i ons f or Asbest os Cont r ol ;

( 6) The pr essure gage shal l be removed f or t est i ng as r equi r edby t he i nspect or;

( 7) Any l eakage of st eam or hot wat er i nt o t he boi l er shal l bepr event ed by di sconnect i ng t he pi pe or val ve at t he mostconveni ent poi nt or any appropr i ate means approved by t hei nspect or ;

( 8) Bef ore openi ng t he manhol e or handhol e cover s and ent eri ngany par t s of t he st eam gener at i ng uni t connect ed t o a commonheader wi t h ot her boi l er s, t he non- r et ur n and st eam st opval ves must be cl osed, t agged, and padl ocked, and drai nval ves or cocks bet ween t he t wo val ves opened. The f eedval ves must be cl osed, t agged, and padl ocked, and drai nval ves or cocks l ocat ed between t he t wo val ves opened. Af t erdr ai ni ng t he boi l er , t he bl ow- of f val ves shal l be cl osed,t agged and padl ocked. Bl ow- of f l i nes, wher e pr act i cabl e,shal l be di sconnected bet ween pr essur e part s and val ves. Al ldr ai ns and vent l i nes shal l be opened.

( b) Pr essur e Vessel s - Pr essur e vessel s shal l be pr epar ed f ori nspect i on t o t he ext ent deemed necessar y by t he i nspect or andt he appl i cabl e pr ocedur es out l i ned i n ( a) above.

GR-3 Boilers and Pressure Vessels Improperly Prepared forInspection

I f a boi l er or pr essur e vessel has not been pr oper l y pr epar edf or an i nt er nal i nspecti on, or i f t he owner or user f ai l s t ocompl y wi t h t he r equi r ement s f or a pr essur e t est as set f ort hi n t hese rul es, t he i nspect or may decl i ne to make t hei nspecti on or t est and t he i nspecti on cer t i f i cat e shal l bewi t hhel d or r i ght t o operat e r evoked, unt i l t he owner or usercompl i es wi t h the requi r ement s.



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GR-4 Removal of Covering to Permit Inspection

I f t he boi l er or pr essur e vessel i s j acket ed so t hat t hel ongi t udi nal seams of shel l s, dr ums or domes cannot be seen,suf f i c i ent j acket i ng, set t i ng wal l , or ot her f orm of casi ngor housi ng shal l be removed t o permi t r easonabl e i nspect i on of t he seams and ot her areas necessary t o determi ne t he condi t i onand saf et y of the boi l er or pr essur e vessel , pr ovi ded suchi nf ormat i on cannot be det ermi ned by ot her means.

GR-5 Lap Seam Crack

The shel l or drum of a boi l er or pressure vessel , i n whi ch al ap seam crack i s di scover ed al ong a l ongi t udi nal r i vet ed

j oi nt , shal l be i mmedi at el y di scont i nued f r om use. Pat chi ngi s pr ohi bi t ed. ( By l ap seam crack i s meant a cr ack f ound i nl ap seams, extendi ng par al l el t o t he l ongi t udi nal j oi nt andl ocat ed ei t her bet ween or adj acent t o r i vet hol es. )

GR-6 Pressure Test

A hydr ost at i c pressur e t est , when appl i ed t o boi l er s orpr essur e vessel s, shal l not exceed 1- 1/ 2 t i mes t he maxi mumal l owabl e worki ng pr essur e. The pr essur e shal l be underpr oper cont r ol so t hat i n no case shal l t he r equi r ed t estpressure be exceeded by more t han 2 percent .

Dur i ng a hydr ostat i c t est t he saf et y val ve or val ves shal l ber emoved or each val ve di sc shal l be hel d t o i t s seat by meansof a t est i ng cl amp and not by scr ewi ng down t he compressi onscr ew upon the spri ng. A pl ug devi ce desi gned f or t hi spurpose may be used.

I t i s suggest ed t hat t he mi ni mum t emperatur e of t he water usedt o appl y a hydr ostat i c t est shal l be not l ess t han 70 degr eesFahr enhei t , but t he maxi mumt emperat ur e dur i ng i nspect i onshal l not exceed 120 degr ees Fahr enhei t .

When a hydr ost at i c t est i s appl i ed t o det er mi ne t i ght ness,t he pr essure shal l be equal t o t he normal oper at i ng pr essurebut need not exceed t he r el ease pressur e of t he saf ety val vehavi ng the l owest r el ease set t i ng.

When t he cont ent s of t he vessel prohi bi t cont ami nat i on by anyother medi um or when a hydr ostat i c t est i s not possi bl e,other t est i ng medi a may be used pr ovi di ng t he pr ecaut i onary

r equi r ement s of t he appl i cabl e sect i on of t he ASME Code aref ol l owed. I n such cases, t here shal l be agr eement betweent he owner and t he i nspect or .

GR-7 Automatic Low Water Fuel Cutoff and/or Water Feeding

Device



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Each aut omat i cal l y f i r ed st eam or vapor syst em boi l er shal l beequi pped wi t h an aut omat i c l ow wat er f uel cut of f so l ocat ed ast o aut omat i cal l y cut of f t he f uel suppl y when t he sur f ace of t he wat er f al l s t o t he l owest saf e wat er l i ne. I f a wat erf eedi ng devi ce i s i nst al l ed, i t shal l be so const r uct ed t hatt he wat er i nl et val ve cannot f eed wat er i nt o t he boi l ert hr ough t he f l oat chamber and so l ocat ed as t o suppl yr equi si t e f eed- wat er . The l owest saf e wat er l i ne shoul d not bel ower t han t he l owest vi si bl e par t of t he wat er gl ass.

Such f uel or f eed- water cont r ol devi ce may be at t ached di r ectt o a boi l er or f or l ow pr essur e boi l er s t o the t apped openi ngspr ovi ded f or at t achi ng a wat er gl ass di r ect t o a boi l er ,pr ovi ded t hat such connect i ons f r om t he boi l er are nonf er r oust ees or Y' s not l ess t han 1/ 2 i n, pi pe si ze bet ween t heboi l er and t he wat er gl ass, so t hat t he wat er gl ass i sat t ached di r ect and as cl ose as possi bl e t o t he boi l er ; t hest r ai ght way t appi ng of t he Y or t ee t o t ake t he wat er gl assf i t t i ngs, t he si de out l et of t he Y or t ee t o t ake t he f uel

cut of f or wat er f eedi ng devi ce. The ends of al l ni ppl es shal lbe reamed to f ul l si ze di amet er .

Desi gns embodyi ng a f l oat and f l oat bowl shal l have a ver t i calst r ai ght away val ve dr ai n pi pe at t he l owest poi nt i n t hewater equal i zi ng pi pe connect i ons by whi ch t he bowl and t heequal i zi ng pi pe can be f l ushed and the devi ce tested.

GR-8 Pressure Reducing Valves

Wher e pressure r educi ng val ves are used, one or more saf etyor saf et y r el i ef val ves shal l be pr ovi ded on t he l ow pr essur esi de of t he r educi ng val ve when the pi pi ng or equi pment on t hel ow pr essur e si de does not meet t he r equi r ement s f or t he f ul li ni t i al pr essur e. The saf et y or saf et y r el i ef val ves shal l bel ocat ed adj oi ni ng or as cl ose as possi bl e t o t he r educi ngval ve. Proper pr ot ect i on shal l be pr ovi ded t o pr event i nj ur yor damage caused by t he escapi ng f l ui d f r om t he di schar ge of saf et y or saf et y r el i ef val ves i f vent ed t o t he at mospher e.

The combi ned di scharge capaci t y of t he saf et y or saf et y r el i ef val ves shal l be such t hat t he pr essure r at i ng of t he l owerpr essur e pi pi ng or equi pment shal l not be exceeded i n case t her educi ng val ve f ai l s i n t he open posi t i on.

The use of hand cont r ol l ed bypasses ar ound r educi ng val ves i sper mi ssi bl e. I f a bypass i s used ar ound t he r educt i on val ve,t he saf et y val ve r equi r ed on t he l ow pr essure si de shal l be of

suf f i ci ent capaci t y t o r el i eve al l the f l ui d t hat can passt hr ough t he bypass wi t hout over - pr essuri ng t he l ow pr essur esi de.

A pr essur e gage shal l be i nst al l ed on t he l ow pr essure si de of a r educi ng val ve.

GR-9 Boiler Blow-off Equipment



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The bl ow- down f r om a boi l er or boi l er s t hat enter s a sani t arysewer syst em or bl ow- down whi ch i s consi der ed a hazard t o l i f eor pr oper t y shal l pass t hr ough some f orm of bl ow- of f equi pmentt hat wi l l r educe pr essur e and t emper atur e as r equi r edher ei naf t er .

The t emperat ure of t he wat er l eavi ng t he bl ow- of f equi pmentshal l not exceed 150 degr ees Fahr enhei t .

The pressure of t he bl ow- down l eavi ng any t ype of bl ow- of f equi pment shal l not exceed 5 psi .

Al l bl ow- of f equi pment shal l be f i t t ed wi t h openi ngs t of aci l i t at e cl eani ng i nspecti on.

Bl ow- of f equi pment shal l conf or m t o t he pr ovi si ons set f or t h i nt he recommended r ul es f or Nat i onal Boar d Boi l er Bl ow- of f Equi pment .

GR-10 Location of Discharge Piping Outlets

The di scharge of saf et y val ves, bl ow- of f pi pes and ot herout l et s shal l be l ocat ed and support ed as t o pr event i nj ur y topersonnel .

GR-11 Supports

Each boi l er and pr essur e vessel shal l be support ed by masonr yor st r uctural suppor t s of suf f i ci ent st r engt h and r i gi di t y t osaf el y suppor t t he boi l er or pr essur e vessel and i t s cont ent s.

Ther e shal l be no excess i ve vi brat i on i n ei t her t he boi l er ,pr essur e vessel or i t s connect i ng pi pi ng.

GR-12 Boiler Door Latches

A wat er - t ube boi l er shal l have t he f i r i ng door s of t he i nwar dopeni ng t ype, unl ess such door s ar e pr ovi ded wi t h subst ant i aland ef f ect i ve l at chi ng or f ast eni ng devi ces or ot her wi se soconst r uct ed as t o pr event t hem, when cl osed, f r om bei ngbl own open by pr essure on the f urnace si de.

These l at ches or f ast eni ngs shal l be of t he posi t i ve sel f l ocki ng t ype. Fr i cti on cont acts, l at ches, or bol t s actuat edby spri ngs shal l not be used. The f oregoi ng r equi r ement s f orl at ches or f ast eni ngs shal l not appl y t o coal openi ngs of downdr af t or si mi l ar f ur naces.

Al l ot her doors, except expl osi on door s, not used i n t hef i r i ng of t he boi l er , may be pr ovi ded wi t h bol t s orf ast eni ngs i n l i eu of sel f l ocki ng l at chi ng devi ces.

Expl osi on door s, i f used and i f l ocat ed i n t he set t i ng wal l swi t hi n 7 f t . of t he f i r i ng f l oor or oper at i ng pl at f or m,shal l be pr ovi ded wi t h subst ant i al def l ect or s t o di ver t t hebl ast.GR-13 Clearance



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When boi l er s ar e r epl aced or new boi l er s ar e i nst al l ed i nei t her exi st i ng or new bui l di ngs, a mi ni mum hei ght of at l east3 f t . shal l be pr ovi ded bet ween t he t op of t he boi l er pr operand t he cei l i ng and at l east 3 f t . bet ween al l si des of t heboi l er and adj acent wal l s or ot her st r uct ur es. Boi l er s andpr essure vessel s havi ng manhol es shal l have 5 f t . cl ear ancef r omt he manhol e openi ng and any wal l , cei l i ng or pi pi ng t hatwi l l pr event a per son f r om ent er i ng t he boi l er or vessel . Al lboi l ers and pr essur e vessel s shal l be so l ocat ed t hat adequat espace wi l l be pr ovi ded f or t he pr oper oper at i on of t he boi l er sand pr essure vessel s and t hei r appur t enances, f or t hei nspect i on of al l sur f aces, t ubes, wat er - wal l s, economi zer s,pi pi ng, val ves and other equi pment , and f or t hei r necessarymai ntenance and repai r and repl acement of t ubes.

GR-14 Ladders and Runways

When necessar y f or saf ety, t here shal l be a st eel r unway orpl at f or m of st andar d const r uct i on i nst al l ed across the t ops of adj acent boi l ers or pr essure vessel s or at some other

conveni ent l evel f or t he pur pose of af f or di ng saf e access.Al l wal kways shal l have at l east t wo means of exi t , each t obe r emotel y l ocat ed f r omt he other .

GR-15 Exit from Boiler Room

Al l boi l er r ooms exceedi ng 500 squar e f eet f l oor ar ea andcont ai ni ng one or more boi l ers havi ng a f uel bur ni ng capaci t yof 1, 000, 000 BTU, or equi val ent el ect r i cal heat i nput , shal lhave at l east t wo means of exi t . Each exi t shal l be r emotel yl ocat ed f r om t he ot her . Each el evat i on i n such boi l er r oomshal l have t wo means of exi t , each r emotel y l ocat ed f r omt heot her .

GR-16 Suggestions for Operations

I t i s suggest ed t hat t he Recommended Rul es f or Care of PowerBoi l ers, Sect i on VI I and t he Recommended Rul es f or Care andOper at i on of Heat i ng Boi l er s, Sect i on VI of t he ASME Code,be used as a gui de f or pr oper and saf e operat i ng pr act i ces.

GR-17 Air and Ventilation Requirements - Combustion Air Supply

and Ventilation of Boiler Room

A permanent sour ce of out si de ai r shal l be pr ovi ded f or eachboi l er r oom t o per mi t sat i sf act or y combust i on of t he f uel aswel l as pr oper vent i l at i on of t he boi l er r oom under normal

oper at i ng condi t i ons.

( a) The t ot al r equi r ement s of t he bur ner s f or al l f i r edpr essure vessel s i n t he boi l er r oom must be used t o det er mi net he l ouver si zes whet her f i r ed by coal , oi l or gas; however ,t he mi ni mumnet f r ee l ouver ed area must not be l ess t han onesquar e f oot . The f ol l owi ng t abl e or f or mul a shal l be used t odetermi ne the net l ouver ed area i n square f eet :



I NPUT REQUI RED AI R MI N. NET LOUVERED

BTU/ HOUR CU/ FT/ MI N. AREA SQ. FT.500, 000 125 1. 0

1, 000, 000 250 1. 0

2, 000, 000 500 1. 6

3, 000, 000 750 2. 5

4, 000, 000 1, 000 3. 3

5, 000, 000 1, 250 4. 1

6, 000, 000 1, 500 5. 0

7, 000, 000 1, 750 5. 8

8, 000, 000 2, 000 6. 6

9, 000, 000 2, 250 7. 5

10, 000, 000 2, 500 8. 3

( BTU/ 10, 000) x 2. 5 = CFM 500CFM per sq. f t . of net r eq. ar ea

( b) When mechani cal vent i l at i on i s used i n l i eu of par agr aph( a) t he suppl y of combust i on and vent i l at i on ai r t o t he boi l err oom and t he f i r i ng devi ce wi l l not oper at e wi t h t he f an of f .

The vel oci t y of t he ai r t hrough t he vent i l at i ng f an shal l notexceed 500 f eet per mi nut e and t he t otal ai r del i ver ed shal lbe equal t o or great er t han shown i n par agr aph ( a) above.

GR-18 Gas Burners

For i nst al l at i ons whi ch ar e gas f i r ed, t he bur ner s used shal lconf orm t o t he appl i cabl e r equi r ement s of t he Amer i can GasAssoci at i on or ot her nat i onal l y recogni zed st andar ds.

GR-19 Conditions Not Covered by These Rules and Regulations

For any condi t i ons not covered by these r equi r ement s, t heappl i cabl e pr ovi si ons of t he ASME Code or t he NATI ONAL BOARDI NSPECTI ON CODE shal l appl y.

Documents

Boiler and Pressure Vessel Inspection_USA