Whats Different in B31.1.pdf.ppt

7/23/2019 Whats Different in B31.1.pdf.ppt

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ASME B31.3 Process Piping


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Whats Different in B31.1

ScopeOrganization of the Code

F!id Ser"ice #e$!ire%ents

Bases for Ao&a'e StressesMateria #e$!ire%ents

Press!re Design #e$!ire%ents

(a"e #e$!ire%entsFa'rication and )nstaation

)nspection* E+a%ination and ,esting


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B31.1 Scope

#!es for this Code Section ha"e 'een

de"eoped considering the needs for

appications &hich inc!de piping t-pica-

fo!nd in eectric po&er generating

stations* ind!stria and instit!tiona pants*

geother%a heating s-ste%s and centra

and district heating and cooing s-ste%s.1//.10


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B31.1 Scope

Po&er piping s-ste%s as co"ered '- this Code

app- to a piping and their co%ponent parts

,he- inc!de '!t are not i%ited to

2 Stea%2 Water

2 Oi

2 as2Air

41//.1.56


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Boier E+terna Piping BEP0

7 enera- defined as piping 'et&een the

'oier and the first 'oc8 "a"e.


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Boier E+terna Piping

,echnica re$!ire%ents are in accordance&ith B31.1

Ad%inistrati"e re$!ire%ents are defined inASME B9P( Code Section ) and inc!dere$!ire%ents for2 B9P( Code sta%p

2 Data reports2 :!ait- contro

2 )nspection


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Organization of the Code

) Scope and Definitions

)) Design

))) Materias)( Di%ensiona #e$!ire%ents

( Fa'rication* Asse%'-* and Erection

() )nspection* E+a%ination and ,esting


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7 Appendices si%iar to B31.3 e+cept

7 )) #!es for Design of Safet- (a"e

)nstaations7 )( Corrosion Contro

7 ( #eco%%ended Practice for Operation*

Maintenance and Modification7 ()) Design of #estrained ;ndergro!nd

Piping


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7 B31.1 pro"ides specific re$!ire%ents for

2 Boier E+terna Piping Stea%* Feed&ater*Bo&off* Bo&do&n and Drains0

2 Bo&off and Bo&do&n Piping


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7 B31.1 pro"ides specific re$!ire%ents for2 Piping for Fa%%a'e or Co%'!sti'e >i$!ids

2 Piping for Fa%%a'e ases and ,o+ic F!ids

2 Piping for Corrosi"e F!ids

2 ,e%porar- Piping

2 Stea% ,rap Piping

2 P!%p S!ction and Discharge Piping2 District ?eating and Stea% Distri'!tion

S-ste%s


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F!id Ser"ice #e$!ire%ents

B31.1 does not define specific f!id

ser"ices* '!t does ha"e i%itations for

piping s-ste%s handing certain f!ids

Specific re$!ire%ents for co%ponents and

@oints are descri'ed in paras. 1/=11.


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Pipe F!id Ser"ice #e$!ire%ents

F!rnace '!tt &eded pipe is not per%itted

for fa%%a'e* co%'!sti'e or to+ic f!ids


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oint F!id Ser"ice #e$!ire%ents

Soc8et &eding size i%ited for BEP and to+ic

f!ids

,hreaded @oints size i%ited '- te%perat!re and

press!re e+a%pe %a+i%!% press!re for


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More oint F!id Ser"ice #e$!ire%ents

OD t!'ing co%pression and fared t!'ingi%ited to 5 in. / %%0

Brazed @oint %a- not 'e !sed for

fa%%a'e or to+ic f!ids in fire hazardareas

Sodered @oints %a- not 'e !sed for

fa%%a'e or to+ic f!idsSodered @oints %a- not 'e !sed in piping

s!'@ect to "i'ration


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Fanged oint #e$!ire%ents

7 B31.1 has detaied re$!ire%ents for

fanged @oints. #e$!ire%ents inc!deH

2 Cass 1/ stee fanges 'oted to Cass 15

cast iron fanges are re$!ired to 'e fat

facedgas8et re$!ired to 'e f! face

2 Boting di%ensions for 'oth ;S c!sto%ar-

and %etric 'oting2 Bot %ateria re$!ire%ents as a f!nction of

fanges and gas8ets


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Bases for Design Stresses

Most Materials2 %aterias other than gra-

iron* %aea'e iron and 'oting0 'eo& the creep

range* the o&est of

2 the specified %ini%!% tensie strength di"ided '- 3.2 1I3 of tensie strength at te%perat!re

2 5I3 of specified %ini%!% -ied strength

2 5I3 of -ied strength at te%perat!re e+cept for

a!stenitic stainess stees and nic8e ao-s &ithsi%iar 'eha"ior* J/K of -ied strength at te%perat!re


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Bases for Design Stresses

AS,M A1/L rade B Car'on Stee ;S C!sto%ar- ;nits0


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B31.1 Materia #e$!ire%ents

Materias for BEP %!st %eet ASME

B9P( Code re$!ire%ents !nisted%aterias %a- not 'e !sed

;nisted %aterias %a- 'e !sed for ODt!'ing co%pression and fared t!'e fittings

;se at te%perat!res a'o"e %a+i%!% in

stress ta'es genera- not per%itted


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Press!re Design

,he r!es for press!re design are

essentia- the sa%e as for B31.3* '!t the-

are not identica.

,he t&o Section Co%%ittees are &or8ing

to %a8e the re$!ire%ents the sa%e.


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Design Press!re 9 ,e%perat!re

allowance for pressure and

temperature variation: ,he Code ao&s

the design press!re to 'e set 'eo& the

%ost se"ere coincident press!re andte%perat!re for the foo&ing "ariationsH

2 Can e+ceed ao&a'e '- 5/K for no %ore

than 1 hrIe"ent and no %ore than / hrI-ear2 Can e+ceed ao&a'e '- 1K for no %ore

than hrIe"ent and nor %ore than // hrI-ear


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Design Press!re 9 ,e%perat!re

allowance for pressure and temperature

variation = conditionsH

2 E+cept as i%ited '- co%ponent standards

2 E+cept as i%ited '- %an!fact!rers2


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(a"e #e$!ire%ents

Standard Valves Can 'e !sed &ithin their

press!re=te%perat!re ratings and an-

additiona i%itations descri'ed in the

Code

Nonstandard Valves Sha 'e of a

design &hich the %an!fact!rer

reco%%ends for the ser"ice


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(a"e #e$!ire%ents

All Valves

7 %!st ha"e 'o&=o!t proofN ste%s

7 OS9 re$!ired for


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Fa'rication and )nstaation

Weder 9 'razer $!aification and 'ending 9

for%ing re$!ire%ents are "er- si%iar '!t not

identica

Preheating and heat treat%ent re$!ire%ents aredifferent

2 B31.3 re$!ires neither preheating or heat treat%ent

for car'on stee &ith thic8ness ess than or e$!a to

3I in. 1J./ %%02 B31.1 re$!ires preheating to 5//GF JGC0 or

2 heat treat%ent for the sa%e thic8ness range


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Fa'rication and )nstaation

Mini%!% soc8et &ed size is 1./J ti%es

no%ina &a thic8ness "ers!s B31.3

re$!ire%ent for 1.5 ti%e press!re design

thic8ness

Fange faces are re$!ired to 'e fitted so

that gas8et contact s!rfaces 'ear

!nifor%- on the gas8et

Bots %!st 'e threaded tro!gh the n!t


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Si%iar distinction 'et&een inspection ande+a%ination* '!t no specific o&nersinspectorN

A!thorized inspector re$!ired for 'oiere+terna piping* ASME B9P( Code*Section )

B31.1 does not inc!de the concept ofrando% &ith progressi"e e+a%inationeither 1//K or none


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)nspection* E+a%ination and

,esting

7 E+a%ination is as re$!ired '- ,a'e 13L.H

Over 750F

(400C)

Over 1025 psig(70 bar)

and 350 to 750F(175 to 400C)

All Others

(is!a p!s

For P

For


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(is!a e+a%ination is re$!ired for a &eds

&ith para. 13L..5 acceptance criteria

2


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BEP re$!ires h-drotest in accordance &ithASME B9P( Code* Section )

ines open to the at%osphere do not re$!iretesting

oints %!st 'e e+posed for e+a%ination d!ringea8 testing* e+cept that ins!ated s-ste%s %a-'e tested '- f!id oss o"er ti%e %ethod


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Press!re %!st 'e hed a %ini%!% of 1/%in!tes* and then %a- 'e red!ced to designpress!re for ea8 e+a%ination period

Stress d!ring h-drotest is i%ited to J/K S*rather than 1//K S

?-drotest press!re is 1. ti%es the designpress!reno te%perat!re correction

Pne!%atic testing re$!ires o&ners appro"aPne!%atic test press!re is 1.5 to 1. ti%es the

design press!re

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Whats Different in B31.1.pdf.ppt