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IS : 636 1988Indian Standard ( Reaffirmed 2003 )

SPECIFICATION FORNON-PERCOLATING FLEXIBLE FIREFIGHTING DELIVERY HOSE( Third Revision )

Third Reprint NOVEMBER 1990unc 614'843'2: 621'643'3 [ 678"t'066 J

@ C "pJ ri gh t 1 98 8BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI] 10002Licensed To: TATA PROJECTS LlM ITEDAugust 1988

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(S I6:56. 1988Indian S tandard

SPECIFICATION FORNON-PERCOLATING FLEXIBLE FIREFIGHTING DELIVERY HOSE( Third Revision )

O. 1 " 0 R E W 0 RD0.1 This Indian Standard ( Third Revision ) wasadopted by the Bureau of Indian Standards on10 .July 1988, after the draft finalized by theRubber Products Sectional Committee had beenapproved by the Petroleum, Coal and RelatedProducts Division Council.0.2 This standard was originally published in1958 and subsequently revised in 1962and in1979. In the second revision, categoriaarion basedon construction was removed and the specificationmade performance-oriented with classificationunder two types, depending on differences in therequirements. The Rubber Products Committeetook cognizance of the continuous improvementachieved in the quality of fire hoses and feltthat uniformly high quality should be preferredfor all fire fighting applications to provide dura-bility and reliability. The Committee, therefore,decided to have only two types of fire hoses inthis standard. Type A is the rubber lined orrubberized fabric lined with or without elasto-meric coating/covering. Type B is the improvedquality, outer elastomeric coated/covered firehose which would take care of the more rigorousoperational uses and changing fire fightingenvironment. Type 2 hose ofl979 edition hasbeen covered under Type A of this third revision.0.3 In this revision, the requirements of massand coil diameter have been modified while therequirements for tensile strength and elongationat break of lining, flexibility and friction losshavc been deleted.

0.3.1 In the second revision, need forIinclusionof abrasion and heat resistance test was felt butin the absence of adequate data, they were notincluded. These requirements have now beenincluded. Further, requirements for water pickupmoisture absorption, ozone resistance and oilresistance test have been included lor Type Bhoses.0.3.2 In this third revision, tests have beenclassified as type, acceptance and routine tests,depending upon the criticality and time factorto facilitate speedy acceptance of lots. '

0.4 In the preparation of this standard, guidancehas been derived from BS 6391 : 1983 'Non-percolating lay flat delivery hoses and hoseassemblies for fire fighting purposes', issued bythe British Standards Institution ( BSI ).0.5 This standard contains clauses 3.1.1 5.3and 6.1 which call foragreement between th~ pur-chaser and the supplier.0.6 For the purpose of deciding whether a parti-cular requirement of this standard is compliedwith, the final value, observed 01' calculated ex-pressing the results of a test or analysis shall berounded off in accordance with IS; 2.1960*.The number of significant places retained in therounded off value should be the same as that ofthe specified value in this standard.

1. SCOPERules for rounding off numerical values ( r'" is ed ) .

1.1 This standard prescribes the requirementsaud methods of'sampling and test for non-perco-lating flexible fire fighting delivery hose of sizes38, 50, 63 and 70 mm.2. TERMINOLOGY2.0 For the purpose of this standar-d, the defin]-tious given in various parts of IS : 7503* andthe following shall apply.

2.1 Type Tests - Tests carried out to proveconformity with the specification. These areintended to prove the genera! qualities and rawmaterials of a given type offire hose.2.2 Acceptance Tests - Tests carried out onsamples taken from a lot for the purpose ofacceptance of the lot.2.3 Routine Tests - Tests carried out atmanufacturer's works on each fire hose to checkthe requirements which are likely to vary during

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IS : 636 19883. TYPES3.1 Hoses shall be of the following two types.

3.1.1 Type A - Normal fire hoses, rubberlined or rubberized fabric linedywoven-jacketedwith or without elastomeric coating/covering forapplication under normal fire conditions.3.1.2 TypB - Hose to which an elastomericOUler coating or covering has been applied orincorporated as reinforcement to give the hosesvery low absorption ofliquids such as oils, greases,acids and alkalis. etc, and has high resistance toabrasion and direct heat.

4. TESTS4.1 Classification of Tests

4.1.1 Type Tests - The following shall consti-tute the type tests:a) Workmanship (see 5.1.1.1 ),b) Rotproofing ( s e e 5.1.1.2 ),c) Internal diameter ( s e e 5.2 ).d) Mass ( s e e 5.4 ),e) Coil diameter ( se e 5.5 ),~) Hydrostatic burst pressure (see 5.6 ),g) Hydrostatic proof pressure ( see 5.7 ),h) Kink test ( se e 5.8 ),j) Change in length ( see 5.9 ),k) Change in diameter ( s e e 5.10 )m) Adhesion ( se e 5.11.1 ),n) Accelerated ageing ( s e e 5.11.2 ).p) Abrasion resistance ( see 5.12),q) Water pick up/moisture absorption ( forType B only) ( see 5.13 ).r) Heat resistance ( s e e 5.14 ),s) Oil resistance (for Type B only) ( s e 5.15), andt) Ozone resistance ( for Type B only) (ue5.16 ).4.1.1.1 C riteria fo r a pp ro va l - Three samplesfrom three different lots shall be submitted fortesting. The testing authority shall issue a typeapproval certificate if the hoses are found tocomply with the requirements of tests givenin 4.1.1.In case. of failure in one or more type tests,the testing authority may call for fresh samplesnot exceeding twice the number of original

samples and subject them to the test(s) in whichthe failure occurred. If in the repeat testfs) nofailure occurs, the tests may be considered toha vebeen satisfied.'4.1.2 Acceptance Tests - The following shallconstitute the acceptance tests:

c) Length ( s e e 5.3 ),d) Mass ( s e e 5.4 ),e) Coil diameter ( see 5.5 ),f) Hydrostatic burst pressure ( s e e 5.6 ),g) Kink test ( s e e 5.8 ),h) Change in length ( see 5.9 ),j) Change in diameter ( see 5.10 ),k} Adhesion ( s e e 5.11.1 ),m) Abrasion resistance ( s e e 5.12 ),n) Water pick up/moisture absorption (forType B only) ( sa 5.13 ), andp) Heat resistance ( s e e 5.14 ).4.1.2.1 A recommended sampling plan fordetermining the acceptability or otherwise of alot, is given in Appendix A.

4.1.3 Routine Testsa) Internal diameter ( S e e 5.2 ), andb) Hydrostatic proof pressure ( see 5.7 ),

5. REQ,UIREMENTSS.I General5.1.1 The hose shali.be constructed from acircular woven jacket having a waterproof rubberlining or rubberized fabric lining on the inside,facing the waterway and with or without elasto-meric coating/covering (Type A) and withelastorneric coating/covering (Type B). Thejacket shall be seamless and compactly wovenfrom good quality cotton yarn or from yarn madefrom suitable synthetic fibre of polyamide orpolyester type of good quality or from theircombinations. Fire hose with outer coating/covering shall be manufactured using syntheticyarn only.

5.1.1.1 Workm an sh ip - The jacket shall bepractically free from dirt, knots, lumps, irregula-rities of the yarn and other visible defects.5 .1 .1 .2 R otp ro ojin g - If cotton yarn is used inthe construction of jacket, this shall be 'treatedwith pentachlorophenyl laurate ( pePL ) to theextent of I' 5 percent minimum by mass as deter-mined by the method described in Appendix Cof IS: 11692-1986*. This test is to be carriedout on the jacket either before or after lining.NO'I'E - Other rotproofing materials may also be usedprovided when tested by pure culture, mixed culture,Aspergillus niglr and soil burial methods prescribed in

IS; 1389-1984t shall conform to the requirementsstipulated against each method.5.1.1.3 Inner lining shall either be of rubberor rubberized fabric and shall be generally smoothand practically free from pitting and otherimperfections.

a) Workmanship ( se e 5.1.1.1 ) Preservatil'c trca!ments for tcxtil~s,I . d'T TATA p!Itf'eth'odyo to'slmg Icorton-~bncs forb) Internal diamete .. AiHli'VJ" 0: aHac~ 1I

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5.1.1.4 Externally applied elastomeric coat-ing or covering of the reinforcement, if present,shall be generally smooth and practically freefrom pitting and other imperfections.5.2 Internal Diameter - 'The internal dia-meter of the hose shall be measured by a suitableconical plug gauge ami shall conform to thespecified diameter with a tolerance of plus 2 andminus 0'0 mill.5.3 Length - Unless specified otherwise, thestandard length shall be 30 metres. Unless other-wise specified, a tolerance of 2 percent shallbe permitted on the length prescribed for thehose b, y the purchaser but the total of all lengthsof hose supplied shall be not less than the totalquantity specified by the purchaser.5.4 Mass - The average mass of hose permetre or 5-metre le.qgth shall be not more thanthat prescribed in Table I. For the determina-tion of mass, sample of the hose shall be condi-tioned at 2 7 2C and 65 5 percent relativehumidity for a period of at least 48 hours andthen shall be weighed Undel' the same conditions.

TABLE 1 MAXIMUM MASSOF THE HOSESIZE Mxss OF Hose PER METRE LENGTH, Maxr- A__.'_-- ---")

Type A Type B(1) (2) (3)mm g g

2 7 5 3 2 03 5 0 425425 50 04 8 0 6 0 0

385 0tiS7 0

5.5 Coil DialDeter ( MaehiDe Coiled) - For30 m length of dry hose without couplings, thecoil diameter shall not exceed 45 ern for Type Aand 55 em for Type B.5.6 Hydrostatic Burst Pre ure Test - Atest length of hose, one metre clear of fittingswhen subjected to an internal hydraulic pressurein accordance with 8:Z of IS: 443-1975, in-creasing it at the rate not exceeding I MPa ( 10'2kgf/cm2) per minute shall not burst or showleakage before a pressure of 3'5 MPa ( 35'7 kgflcm2 ) is reached,5.7 Hydrostatic Proof Pressure Test-Each hose length shall be subjected to an internalhydraulic pressure of 2'1 MPa ( 21'4 kgf/cm2 )in accordance with 8.3 of IS : 443}975* increas-ing the pressure at the rate of not exceeding1MPa ( 10'2 kgf7cm~) per minute and maintain-ing it for one minute. Within this one minute,the hose shall not develop any leakage or sweat-tng nor any thread in the jacket shall break,5.8 Kink Test - Connect a 3 metre length ofhose to a suitable hydraulic pump. Blank thefree end of hose pipe with a suitable coupling

IS I636 1.88having arrangement to. bleed out entrapped airwith the help of suitable stop cock or pet cock.Fill the hose with water and raise the pressureto 70 kPa ( 07 kgf/cm~), Allow all air to escapethrough stop cock by raising the free end of thehose and again rebuild the pressure 10 70 kl'a,Xow kink the hose through 1800 at approxi-mately 50 COl from the free end by tying the hoseback against itself as close to the fitting as practi-cable. Increase the pressure at a rate not exceed-ing IMPa (10'2 kgf/cm2) per minute to 2'}MPa ( 21'4 kgf/cm2 ), When maximum pressurehas been attained, retain it for 30 seconds, re-lease the preSSUI"e,xamine it for sign of leakageand damage. There shall be no sign of leakage01' rupture and no thread in the jacket shallbreak.5.9 Change in Length - The increase in lengthshall not exceed 6 percent when measured inaccordance with 5.9.1.5.9.1 Connect the hose to a suitable pump andraise the pressure to 70 kPa ( 0'7 kgf/cm2 ) ensur-ing that all the entrapped air has been bled outand mark two points not less than 100 em apart,then raise the pressure to I MPa (10'2 kgf/cm8 )and maintain for minimum 2 minutes, andmeasure the distance between the two markingsagain.

5.10 Change in DialDeter - When subjectedto a pressure of 1 MPa ( 10'2 kgf/cm2) in accor-dance with 5.9.1, the increase in diameter shallnot be more than 10 percent.5.11 RequirelDents for Rubber Liaine .adthe Outer Coatine

5.11.1 A.dhesion- When tested according tothe method described in Appendix B, the rate ofseparation of the lining and the jacket, and forType B hoses, the rate of separation of th. coverand the jacket shall not exceed 25 mm/min.

5.11.2 Accelerated Ageing Test - Four numbersof test hose pieces each of I metre length shallbe conditioned for 120 h at 27 2e and 6 5 5percent relative humidity and shall then be agedfor 336 h at 70 2C, After ageing, there shallbe no tackiness on the surface of lining or thesurface of the cover. Three numbers of aged lestpieces each of 1 metre length shall then besubjected to burst pressure test in accordancewith the method described in IS : 443-1975 andshall meet the requirements. given in 5.6. Theremaining length of hose shall be used for anadhesion test in accordance with the methoddescribed in Appendix B using a load of 2 kg forthe lining and 3'5 kg for the cover, Rate ofseparation of the lining and the jacket, and forType B hoses, the rate of separation of the coverand the jacket shall not exceed 25 mm/min.

Methods of sampling and test, for rubber hose . s eeolltAT A M(et odO ' 0 Esampling,and I t e a t ]for-z;ubber hose ( IItMd~lUisi811', Licensed 0: .tqi~ID!"? C I 5 L IVI IE[)Email: tic@tataprojects.com

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IS I636 - 19885.12 Abrasion Resistance - When determinedby the method described in Appendix C, theaverage number of cycles completed beforebursting for five test pieces shall not be less t han100 for Type Aand 200 for Type B.5,13 Water Pick Up/Moisture Absorption(for Type B Only) - When determined bythe method described in Appendix D, theamount of water absorbed shall not exceed002 kgjrn".

NOTE -- Moisture- absorption res istance to fire hosesis related to their abil ity for acid alkali resistance.5:14 Heat Resistance - When tested by themethod described in Appendix E, none of thetest samples shall burst at less than 8.seconds ofthe application of hot cube for Type A and20 seconds for Type B.5.15 Oil Resistance Test (for Type BOnly) - Alest piece measuring 1metre in lengthshall be marked around the circumference at adistance of 60 mm from each end. The test pieceshall be kept immersed in an oil bath for70 hours containing oil No.3 specified in IS : 3400(Part 6 )-1983* and maintained at 50 20in such a manner that the both ends are soclamped that the marks are in level with thesurface of oil and the remaining entire length ofthe test piece within the marks remains comple-tely immersed in oil. At the end of this period,the test piece shall be taken out in such a mannerthat the portions beyond the marks do not comein' contact with the oil. The length shall be laidhorizontally and the central fully immersed por-tion of the hose shall be visually examined forany swelling of rubber, weathering and crackingin the rubber lining.

Test pieces taken from the central (fullyimmersed) portion of the hose shall then besubjected to an adhesion test in accordance withthe method described in Appendix B and shallmeet the requirements as given in 5.11.1 (forboth lining and cover ).5.16 Ozone Resistance (for Type B Only) -When tested by the method prescribed in Appen-dix F, the lining and cover of the hose shallneither develop cracking nor crazing, that is, fine

*Methods of test for vulcanized rubbers: Part 6 Resis-tance to liquids ( firs l r ev is io n ) .

flaws visible when seen under X2 magnification,except at the cut edges of the hose.6.PACKING AND MARKING6.1 Packing - The hoses may be dusted withFrench chalk ( sec IS : 380-1978* ) on the insideand also outside, in case of coated/covered hosesif required by the purchaser and shall be packedand delivered in specified lengths in neat, cleanand dry condition in polyethylene bags.6.2 Marking - Beginning at a point not lessthan one metre from each end, each length ofhose shall be marked with clear and indelibleletters at least 20 rnm in height indicating:

a) Type of the hose,b) Size of the hose,c) Length of the hose,d) Manufacturer's name or trade-mark orboth. ande) Month and year of manufacture.

6.2.t Each length of hose may also be markedwith the Standard Mark, NOTE - The use of the Standard Mark is governedby the provisions of the Bureau of Indian StandardsAct 1980 and the Rules and Regulations made there-under. The Standard Mark on products covered by anIndian Standard conveys the assurance that they havehee n produced to comply with the requirements of thatstandard under a well defined system of inspection,testing and quality control which is devised and SUPH-vised by BIS and operated by the producer. Standardmarked products are also continuously checked by BISfor coforrnity to that standard as a further safeguard.Details of conditions under which a licence for the usc'of the Standard Mark may be granted to manufacturersor producers may be obtained from the Bureau of IndianStandards.

7. TIME LAPSE BETWEEN RECEIPT OFMATERIAL AND TESTING7.1 For all test purposes, the minimum timebetween vulcanization and testing shall be 16 h.7.1.1 For product tests, whenever possible, thetime .lapse between vulcanization and testingshould not exceed 4 months In other cases,tests shall be made within 2 months from thereceipt of the product by the consumer.Specification for French chalk, technical (Jtcond

r evision ) .

APPENDIX A( C lau se 4.1.2.1 )SAMPLING OF FIRE FIGHTING HOSES

A-O. GENERAL be obtained from IS: 397 (Part 1 )-1972* andIS : 397 (Part 2 )-1985* for the purpose ofensuring the homogeneity of the lot.-O.l The object of testing hoses by thepurchaser is to ensure conformity to the speci-fication whereas testing by the manufacturer *1\6 h dr' . I lit tId' g.. hr.' b -,et 0 ror statrstrca qua I y con ro ur induring production IS to ensure t e conlOrmIty y . pfOduc~ion:reducing the quality fhki~~~~@ltojhT'@~niPA~A PRP.3}l!.ltEGl~IScbhMJ~.m@tes (fiTst reuisioll).and thus ensure the conformity ~f the .\ot tp the Part,2 Control chart for attributes and count ofspecified requirements. A useful: rgru , ff i~n jc teJQ@taJt~ .~ ' : i )nG1"~B}~~si~ \ ) )

4

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A-I. SCALE OF SAMPLINGA-t.l Lot - In a single consignment, all thelengths of fire fighting hoses of same type, sizeand produced under similar conditions of manu-facture, that is, fro m single batch of raw materialor from components obtained from single sourceof production or undergoing a single curingprocess, shall be separated to constitute a lot.A-I.2 For ascertaining the conformity of thematerial in the lot to the requirements of thespecification, tests shall be carried out on thesamples taken from each lot separately.A-l.3 The number of lengths of hoses to beselected from each lot, for this purpose, shalldepend on the size of the lot and shall be inaccordance with Table 2 .

TABLE 2 SCALE OF SAMPLINGLOT Slim

( IN LENGTIIS jS,IMPI,ESIZE FORVISUAl,

..~lJDIlIEN-SION.\L

REQUIRE-

Sun-SAMPLESIZE

PER)IISSI-BLE No.0'

DEFECTIVELENGTHS

~lENTS(I)

Up to 100101to 300301 to 500501 and above

(2)2 03 25 08 0

(3)1235 2

(4)

A ..I.3.1 The required number of lengths ofhoses shall be selected at random from the lot.In order to ensure the randomness of selection,procedure given in IS: 49051968* may befollowed.

*Methods for random sampling.

IS I636 - 1988A.2. NUMBER OF TESTS AND CRITERIAFOR CONFORMITYA-2.t The lengths of hose selected according tocol I and 2 of Table 2 shall be examined forvisual and dimensional requirements givenin 5.1.1, 5.1.1.1, 5.2, 5.3,5.4 and 5.5 of thespecification, A length of hose failing in an)one or more of these requirements shall be consi-dered as defective. The lot shall be consideredas satisfying these requirements if the number ofdefectives found in the sample is less than orequal to the corresponding permissible numberof defectives given in col 3 of Table 2 .A-2.2 The lot having been found satisfactoryaccording to A-2.1 shall be subjected to destructivetests given in 5.6, 5.8,5.9.5.10,5.11.1,5.12.5.13( for Type B only) and 5.14 . For this purpose,the number of lengths of hoses given in col 4 ofTable 2 shall be selected from the lot. Thesemay be selected from those already testedaccording to A-2.1 and found satisfactory, Thetest specimens of requisite dimensions shall becut from each sample hose thus selected.A-2.2.1 The lot shall be considered as con-

fanning to the requirements of these characteri-stics 'if all the lengths of hoses subjected tovarious destructive tests satisfy the relevantspecification requirements.

'NOTE - In case cutting up of the test pieces for anytests from a length of hose is found to be uneconomicalor impracticable. the required number of test piecesmay be produced by the same process by which thehoses in the lot have been manufactured and suppliedseparately along with the lot.A-2.3 The lot shall be declared as conformingto the requirements (If the specification if A-2.tand A-2.2 are satisfied.

APPEN'DIX B( C la us es 5.11.1,5.11.2 an d 5.15)

METHOD OF TEST FOR DETERMINATION OF ADHESION STRENGTHB-1. TEST PIECEB-1.1 The test piece shall be a cylindrical sectionof the hose, 25'0 0'5 mm Iong, cut perpendi-cular to the axis of the hose with a sharp tool.B-2. APPARATUSB-2.1 Mandrel - It is snug fit in the test piecewith a central shaft.

NOT!: - The material of mandrel may be teak woodand that of central shaft may be stainless steel.

B-2.3 Means of Applying a Load to the TestPiece - These shall incorporate a grip forattachment to the lining or cover and springfor supporting weights and to serve as a cushionso as to protect the test piece from receivingjerks and impulses.A typical layout of the test apparatus is given

in Fig. 1.B-~. PROCEDUREB-3.1 Lining/Reinfol'celDent Adhesion-Turn the test piece inside out, to expose thelining, and separate the lining and reinforcementLicensed To: TATA PROJECTS LIMITED

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B-2.2 Means of Supporting the Mandrel-So that it may rotate in an essentially friction-free manner on its shaft.

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IS I636 1988

SPRING

WEIGHTS

~ANORH

just sufficient to enable the grip to be attached.Slide the test piece on to the mandrel and insertin the apparatus. Attach the grip together withweights to give a total mass of 2'5 kg and thenmeasure the length of lining separated afterI minute.B-3.2 Cover;Reinforcement Adhesion .,- Fal'Type n hoses, repeat the procedure describedin B-3.1 using a separate test piece but test thecover adhesion without reversing the test pieceand apply a total mass of 4'5 kg.B-4. TEST REPORTB-4.1 The test report shall include the followinginformation:

a) The date of test;b) All details necessary for the completeidentification of the hose under test; andc) The length of separation, if any, afterI minute.

Fro. 1 TYPICAL ApPARATUS POR THE ADHESION TEST

APPENDIX C( C lause 5.12 )

ABRASION RESISTANCE TESTCO. OUTLINE OF THE METHODGoO. I In this test, capability of the hose towithstand the rough usage to ground which itis hound to be subjected to during fire operationis tested. The hose may be dragged on roughsurfaces or bent where it comes in contact withbuilding corners or where the first length frompump delivery touches the ground and is sub-jected to continuous chafing due to vibration ofpump.C-I. APPARATUS

number af cycles completed before the test piecebursts is to be termed as abrasion resistancecycles. Five test pieces shall be taken for suchtests and the average number of cyclesdetermined.C-J.2 Test Apparatus - A test apparatusshall be fabricated comprising the following:

a) A constant and uninterrupted source ofhydrostatic pressure with water as testmedium, capable of maintaining a steadypressure of 0'7 MPa or 700 kPa ( 7 kgflcm2 ) in the test piece and provisions tobleed out entrapped air.

b) A machine for abrading the test pieceP R O with ,a,\recipro[_catinglrmOi\'f)ment.typicalJt:v Io nvn Cu

C-l.l For determining a realistic value. ofabrasion re-istance of the hose, a special appa-ratus is used as c1escribeE.."e&rls2edT7eoa:vef,:_~erA

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layout of the tests apparatus is given inFig. 2.c) Abrasive material fixed on the testapparatus. The abrasive material shallbe a strip 25 mm wide and ::100 5 rnmlong; grit 50 'X ' weight, glue bondedaluminium oxide cloth in accordancewith IS: 715 (Part 2 )-1976. A newabrading strip shall be used for eachtest.

d) An electric air blower to blow away theabraded fluff.Specification for coated abrasives: Part 2 Special andmechanized applications (third revision).

STROKE COUNTERMETER - _,. ....

IS : 636 1988C-2. TEST SPECIMENSC-2.1 Test Piece - Cut pieces of 35 em lengthof hose.C-2.2 Nurnber of Test Pfeces - Three testpieces shall be subjected to abrasion resistancetest.C.3. PROCEDUREC~3.1 The abrading strip shall be mounted ina carrier and shall be set at an angle of 45 tothe horizontal axis of the test piece and at anangle of 20 to the direction of reciprocatingaction of the test machine. The apparatus shallbe adjusted to give a frequency of 50 to 60 cycles

76 2

6 mm THICKMS.TOP SHEET F L A T TIE

2S)(2S~6mmANGLE IRON lEG

2Sx6mm M SFLAT SUPPORT

ELEVATION

FIG. IAll dimensions in miilimetres.

G E N E R A L i ~ e n s e M c r t o :A Y A S r lAP ~ H U ~ ~ t 5 H I I~lR l f i 1 r E 0Email-ztic@tataprojects.com

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IS I636 - 1988(double strokes) of reciprocating movementper minute. The length of each single strokeshall be adjusted to 230 mm. The machine shallexert a downward force of 1'58 kgf ( 15'5 N) onthe lest piece.C-3.2 Connect the test piece to the pressuresource by suitable means.C-3.3 Fill up the test piece with water at alow pressure to expel all air. Apply a pressureof 0'7 MPa ( 700 kPa) raised gradually. Testpiece should be horizontal as any curved fixingmay lead to lower values/results.

Care shall be exercised to ensure that thehose test piece is fixed on the bed of the machinein such a manner that the free end may stretchfully, and maintain this pressure of 700 kPa forminimum two minutes before starting theabrasion. Care shall also be exei cised to ensurethat the abrading strip does not abrade the hose

test piece at the lap. joint otherwise false resultswill be obtained on the much higher side.C3.4 Switch on the air blower and start thetest machine. Record the number of cyclescompleted until the test piece bursts. The re-cording of cycles should be done by a meteringdevice such as stroke counter and it should beswitched off as soon as the hose bursts.C-3.5 Repeat the test with a new abrading stripfixed on the machine, and a new test piece, threetimes.C-3.6 Take the average value for three testpieces.C-3.7 Remove any dirt or debris from the planeof abrasion by using an ordinary air blowerworking at a low pressure of 100 kPa and thenozzle fixed to some firm object, directing theair jet at an angle from a distance not exceeding~O O mm

APPENDIX D( C la use 5.13 )

METHODS OF TEST FOR MOISTURE ABSORPTIONn-i. TEST PIECED-l.1 The test piece shall be 600 nun length ofhose marked around the circumference at dis-tance of 50 mm from each end.D.2. APPARATUSD-2.1 Forced circulation air oven capable ofbeing controlled at 50 1C.0-2.2 Water bath, filled with distilled water,capable of being controlled at 20 . 5C.03. CONDITIONINGD-3.1 Condition the test piece in the ovenat 50 1C for 3 hours, immediately prior

to testing.D-4.PROCEOURE0-4.1 Weigh the conditioned test piece to anaccuracy of O' \ g. Fold the test piece inside themarks so that the ends are vertical. Place the testpiece in the water bath, maintained at 20 5C,and clamp the ends of the piece so thatthe marks are in level with the surface of thewater and the entire length of test piece withinthe marks is immersed. After a period of 6 hours,remove the test piece from the water, wipe thesurface dry with an absorbent doth and allowit to dry by hanging vertically at 27 2Cfor 2 hours and then weigh.

APPENDIX E( C lau se 5.14 )

METHODS OF TEST FOR HEAT RESISTANCEs-r, TEST PIECEEl.1 Each test piece shall be I metre length ofhose freshly cut from the lot offered for inspection.There shall be 5 number of test pieces for thistest.B-2. APPARATUSI::-2.0 The following ~is ~f~~t'1s~fso:qoliA;c A

E-2.1 Laboratory furnace capable of being con-trolled at 600!~O'C.E-2.2 A number of steel cubes of uniform sizeeach side being of 13'0 0'1 mm.E-2.3 Source of steady hydrostatic pressure withwater as the test medium. The pressure shall bemaintained at 0'7 MPa ( 7 kgf'cm2 ) in the test

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K2.4 A stop watch with a least count of 0'2seconds.E-2.5 A pair of steel tongs of size 30 em.E-2.6 A stout guard made of steel wire mesh (0protecl the pcrsonts) conducting the test againstany injury.E-3. TEST PROCEDUREE-3_1 Place the steel cubes in the furnace at(jOO,!:~ooC and maintain this temperature for atleast 30 minutes immediately before use.E-3.2 Connect the hose test piece to the pressuresource and fil l the test piece with water at a lowpressu re not exceeding 70 kPa to expel all the airfro m inside the test piece with the help of a petcock. Place the test piece horizontally on somehard smooth surface like ReC or metalled table.Put the free end of the test piece inside the guard.Apply thc water pre ssu re gradually raising it up"to 0-7 MPa.

IS : 636 - 1988E-3.3 Take out the healed steel cube fromthe fUInacc \V ith the help of an iron tong asquickly as possible (maximum time lapse2 seconds) and place it immediately on top ofthe test piece. The steel cube shall be held inposition by means of light wire support. Recordthe time elapsed from the time of placing thesteel cube on the test piece until the test piecebursts. Repeat the test for all the 5 test pieces.Burst shall not occur within 8 seconds of theapplication of the steel cube, on any of the testpieces for Type A aud 20 seconds for Type H.

Care shall be exercised to ensure that the hotcube is not placed on lap joint otherwise falseresults will be obtained on much higher side.For each test, only new mild steel cubes freefrom rust, carbon particles and loose flakes shallbe used.NDTl

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BUREAU OF INDIAN STANDARDS

Regional Offices:Central. Manak Bhavan. 9 8ahadur Shah Zafar Marg.NEW DELHI 110002-Eastern : 1'/14 C. I. T. Scheme VII M, V. I. P. Road,Manikto!a . CALCUTTA 700054Northern : SCO 445-446, Sector 35-C,CHANDIGARH 160036

Headquarters:Manak Bhavan, 9 Bahadur Shah Zafar Marg. NEW DELHI 110002Telephones: 331 01 31, 331 13 75 Telegrams: Manaksanstha( Common to all Offices)

Telephone{331 01 31l331 13 7536 2499

Southern : C. I. T . Campus. MADRAS 600113tWestern : Manakalaya, E9 MJDC. Marol, Andheri ( East).BOMBAY 400093

~ 2 18 43{ 3 16 41{41 244241 25 1941 29 166 32 9295

Branch Offices:'Pushpak ', Nurmohamed Shaikh Marg, Khanpur, ( 2 63 48AHMADABAD 380001 1 263 49

tPeenya Industrial Area 1st Stage, Bangalore Tumkur Road {38 49 55BANGALORE 560058 l38 49 56Gangotri Complex. 5th Floor, Bhadbhada Road. T. T. Nagar, 6 67 16BHOPAL 462003Plot No. 82/83. Lewis Road. BHUBANESHWAR 751002 5 36 2763/5. Ward No'. 29, R.G. Barua Road. 6th Byelane, 3 31 77GUWAHATI7810036-8-56C L. N. Gupta Mar9 ( Nampally Station Road ), 231083HYDEAABAD 500001A14 Yudhister Marg. C Scheme. JAIPUR 302005117/418 B Sarvodaya Na9ar~ KANPUR 208005Patliputra Industrial Estate, PATNA 800013T.C. No. 14/1421. University P.C. PalayamTRIVANDRUM 695035

J 6 34 711 6 98 32{21 68 7621 829262305{621 04'\.621 17Inspection Offices ( With Sale Point):

Pushpaniail. First Floor, 205A West High Court Road, 2 51 71Shankar Nagar Square. NAGPUR 440010Institution of Engineers ( India) Building, 1332 Shivaji Nagar, 6 24 35PUNE 411005-Sales Office in Calcutta is al 5 Chowringhee Approach, P. 0, Princep 276800Street. Calcutta 700072tSales Office in Bombay is at Novelty Chambers. Grant Road, 89 65 28Bombay 400007:Sales Ottice in Bangalore is at Unity Building. Narasimharaj. Square. 223671Bangalore 5600Q2

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