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IS 15722: Road vehicles - Compressed natural gas (CNG) fuel system components - CNG Low-pressure flexible fuel line with end connections, CNG Fuel line having pressure not exceeding 2.15 Mpa (21.5 bar) PDF

2006·1.6 MB·English
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Preview IS 15722: Road vehicles - Compressed natural gas (CNG) fuel system components - CNG Low-pressure flexible fuel line with end connections, CNG Fuel line having pressure not exceeding 2.15 Mpa (21.5 bar)

इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 15722 (2006): Road vehicles - Compressed natural gas (CNG) fuel system components - CNG Low-pressure flexible fuel line with end connections, CNG Fuel line having pressure not exceeding 2.15 Mpa (21.5 bar) [TED 26: Automotive vehicles on NCES] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” l!!!!!! ,. IS 15722:2006 !$ ,, ,1 ., Indian Standard * I ROAD VEHICLES — COMPRESSED NATURAL GAS (CNG) FUEL SYSTEM COMPONENTS — CNG LOW-PRESSURE FLEXIBLE FUEL LINE WITH END CONNECTIONS [CNG FUEL LINE HAVING PRESSURE NOT EXCEEDING 2.15 MPa (21.5 BAR)] ICS 43.060.40 @ BIS2006 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 December 2006 Price Group 5 ~,. l!?!!!! Automotive VehiclesRunning onNon-conventional Energy Sources Sectional Committee, TED 26 &‘ ., FOREWORD This Indian Standard was adopted bythe Bureau ofIndian Standards, after the dratl finalized bytheAutomotive VehiclesRunning onNon-conventional Energy Sources Sectional Committee hadbeen approved bytheTransport Engineering Division Council. Inthe formulation ofthis standard considerable assistance hasbeen derived from the following standards issued bytheAutomotive Research Association of India and SAE International respectively: AIS 024 (Amd 4 to version 3) — Safety and procedural requirements for type approval of CNG operated vehicles AIS 028 (Version 3)— Code ofpractice foruseofCNG fuel ininternal combustion engine vehicles SAE J30 :1998 — Fuel and oil hoses This standard isoneofthe series ofIndian Standards published onCNG onboard fuelsystemcomponents. Other standards inthis series are: ISNo. lltle 15710:2006 Road vehicles — Compressed natural gas (CNG) fuel system components — General requirements anddefinitions 15711:2006 Roadvehicles—Compressednaturalgas(CNG)fuelsystemcomponents—Performance and general testmethods 15712:2006 Road vehicles — Compressed natural gas (CNG) t%elsystem components —Automatic valve (solenoid valve) 15713:2006 Road vehicles — Compressed natural gas (CNG) fiel system components — Pressure regulator 15714:2006 Roadvehicles—Compressednaturalgas(CNG)fuelsystemcomponents—Gas/airmixer 15715:2006 Road vehicles — Compressed natural gas (CNG) fuel system components — Conduit (ventilation hose) 15716:2006 Road veh i cles — Compressed natural gas (CNG) fuel system components — CNGhigh pressure fue l line (rigid) with end connections [having pressure exceeding 2.15 MPa (21.5 bar)] 15717:2006 Road vehicles—Compressed natural gas(CNG) fuelsystemcomponents —Petrol valve (automatic/manual) 15718:2006 Road vehicles — Compressed natural gas(CNG) fuel system components — CNGhigh pressure fuelline(flexible hose)withendconnections [having servicepressure exceeding 2.15 MPa (21.5 bar)] 15719 :200.6 Road vehicles — Compressed natural gas (CNG) fuel system components — Electrical wiring kit 15720:2006 Roadvehicles—Compressednaturalgas(CNG)fuelsystemcomponents—Compartments/ sub-compartments 15721:2006 Road vehicles — Compressed natural gas (CNG) — Fire retardant material for seat, upholstery, roof andside lining 15723:2006 Road vehicles — Compressed natural gas (CNG) fuel system components — Current limiting devices The composition ofthe Committee responsible forthe formulation ofthis standard isgiven inAnnexA. For the purpose of deciding whether aparticular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS2:1960 ‘Rules for rounding offnumerical values (revised)’. The number of significant places retained inthe rounded offvalue should be the same asthat ofthe specified value inthis standard. 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(cid:8216)(cid:104)(cid:41)(cid:68)(cid:114)(cid:97)(cid:119)(cid:105)(cid:110)(cid:103)(cid:115)(cid:32)(cid:119)(cid:105)(cid:116)(cid:104)(cid:32)(cid:114)(cid:101)(cid:108)(cid:101)(cid:118)(cid:97)(cid:110)(cid:116)(cid:32)(cid:100)(cid:105)(cid:109)(cid:101)(cid:110)(cid:115)(cid:105)(cid:111)(cid:110)(cid:115)(cid:32)(cid:97)(cid:110)(cid:100)(cid:32)(cid:109)(cid:97)(cid:116)(cid:101)(cid:114)(cid:105)(cid:97)(cid:108)(cid:115)(cid:8217) (cid:40)(cid:84)(cid:69)(cid:68)(cid:50)(cid:54)(cid:41) (cid:82)(cid:101)(cid:112)(cid:114)(cid:111)(cid:103)(cid:114)(cid:97)(cid:112)(cid:104)(cid:121)(cid:32)(cid:85)(cid:110)(cid:105)(cid:116)(cid:44)(cid:32)(cid:66)(cid:73)(cid:83)(cid:44)(cid:32)(cid:78)(cid:101)(cid:119)(cid:32)(cid:68)(cid:101)(cid:108)(cid:104)(cid:105)(cid:44)(cid:32)(cid:73)(cid:110)(cid:100)(cid:105)(cid:97) (cid:50) IS 15722:2006 Indian Standard ROAD VEHICLES — COMPRESSED NATURAL GAS (CNG) FUEL SYSTEM COMPONENTS — CNG LOW-PRESSURE FLEXIBLE FUEL LINE WITH END CONNECTIONS [CNG FUEL LINE HAVING PRESSURE NOT EXCEEDING 2.15 MPa (21.5 BAR)] 1 SCOPE of applying the most recent editions of the standards indicated below: 1.1 This standard specifies definitions, test methods and requirements of CNG low-pressure flexible fhel IS No. Z’7tle linewithendcomections ofCNGonboard fuelsystem 3400 Methods of test for vulcanized component having service pressure not exceeding rubbers: 2.15 MPa (21.5 Bar), intended for use on motor (Part 1): 1987 Tensile stress strain properties vehicles defined in IS 14272 (Part 1), two wheelers (second revision) andconstruction equipment vehicles (CEV). (Part 4): 1987 Acceleratedageing(secondrevision) 1.1.1 This standard isapplicable to CNG fuel system (Part 6): 2005/ Determination of the effect of components intended to use on vehicles using ISO 1817:1999 liquids (second revision) compressed natural gas (mono-fuel or hi-fuel (Part 20) : 1994/ Resistance to ozone cracking — applications). ISO1431-1:1989 Static strain test 1.1.2 Itisnot applicable to the following: 14272 Automotive vehicles — Types — (Part 1): 1995 Terminology: Part 1Threeandfour a) Liquefied natural gas (LNG) fuel system wheelers components located upstream of, and including, the vaporizer; 15710:2006 Road vehicles — Compressed natural gas (CNG) fuel system b) Fuel containers; components—Generalrequirements c) Stationary gasengines; and and definitions d) CNG fuel systems components for the 15711:2006 Road vehicles — Compressed propulsion ofmarine craft. natural gas (CNG) fuel system components — Performance and 1.1.3 This standard isbased upon a service pressure general test methods for compressed natural gas as a fuel at 20 MPa (200Bar)settledat 15”C.Otherservicepressurescould 3 DEFINITIONS be accommodated by adjusting the pressure by the For the purpose of this standard the definitions those appropriate factor (ratio). For example, a 25 MPa given inIS 15710shall apply. (250Bar)servicepressuresystemwillrequirepressures tobemultiplied by 1.25.Allreferences topressure are 4 CLASSIFICATION to be considered gauge pressures unless otherwise 4.1 CNGlow-pressure flexible fhellinesareclassified specified. into following three classes: 2 REFERENCES a) Class 1—Hosesuitableforuseintemperature The following standards contain provisions, which, upto 1Oo”c, through reference inthis text, constitute provisions of b) Class2—Hosesuitableforuseintemperature this standard. At the time of publication the editions upto 125°C, and indicated were valid. All standards are subject to c) Class 3— Hosesuitableforuseintemperature revision and parties to agreements based on this up to 150”C intermittently and 135°C standard are encouraged to investigate the po ssibility continuously. 1 IS 15722:2006 .. 4.2 Depending uponthe service pressure thepipes are 5h inanunrestrained loop positioned between2jaws classified into following two types: 50.8 mm wide and 63.5 mm apart. The aged samples shallbeconditioned for5hat requiredcoldtemperature a) Type 1— Hose having service pressure not (see Tables I to 3) inan unrestrained loop positioned exceeding 100kpa (1bar), and between twojaws 50.8 mm wide and 63.5nun apart. b) Type 2 — Hose having service pressure exceeding 100 kPa (1 bar) and less than While still incold chamber, thejaws shallbe brought N 2.15 MPa (21.5 bar). together as rapidly as possible until 25.40 mm apart. The specimens shallnot fracture nor showanycracks, 5 REQUIREMENTS Ol? CNG LOW PRESSURE checks, or breaks. FUEL LINE 5.5 Tensile Strength and Elongation 5.1 All CNG fuel lines of Type 1 (see 4.2) shall withstand 5 times the working pressure and shall When tested as per IS 3400 (Part 1)tensile strength complywiththerequirements giveninTables1,2and31 andelongation atbreak ontube andcoverofhoseshall beasgiven below: 5.2 All CNG fuel lines of Type 2 (see 4.2) shall withstand a minimum burst pressure of 4.8 MPa and Tensile strength ofcover :7.0 MPa, Min shallcomply with the requirements given inTables 1, Tensile strength of tube :8.0 MPa, Min 2and3. Elongation atbreak of tube :200 percent, Min andcover 5.3 Vacuum Collapse Test 5.6 Dry Heat Resistance Hoses having sizes less than 12.70 mm ID shall be subjected to 81 kPa vacuum. Size 12.70 mm to Whentested forresistance to dryheat oftube (lining) 25.40 mmIDshallbesubjectedto34kpavacuum.Thk andcover asper IS 3400 (Part 4) withconditi~s and requirement shall not apply to sizes larger than requirements specified in Tables 1to 3 for 70 h, the 25.40 mm ID. During the vacuum test a 1mlength of reduction in tensile strength and elongation of hose assembly shall be held in a straight line, and specimens taken from the tube and cover shall not diameter shall not decrease by more than 20 percent exceed the values asshown inTables 1to3. during application of vacuum for aminimum of 15s andnotmorethan 60s. The vacuum collapse testshall 5.7 Fuel Resistance be performed onthe finished parts. After 48 h immersion at room temperature, 23 &2°C inreference fuelC(50Toluene–50 iso-octane percent 5.4 Cold Flexibility by volume), physical values of specimens taken from Forstraighthose 19.05mmIDan d under,twosamples thetube shallnot exceed the change invalueslistedin of whole hose shall be used. One sample shall be Tables 1to 3. immersed inOilNo. 3 [see IS 3400 (Part 6)] for 70h 5.8 Oil Resistance at required temperature (see Tables 1to 3) and one shall be used as unaged. The unaged sample shall be Whentested asperIS3400(Part 6)for70himmersion conditionedat–40+2°C for5handthenflexedincold at the required temperature (see Tables 1to 3) in Oil chamberthrough 180°from centreline toadiameter of No.3,physicalvaluesofspecimenstakenfromthetube 10times the maximum OD of hose. The aged sample andcover shallnotexceedthevalueslistedinTables 1 shall be conditioned at required temperature (see to3. Tables 1to 3) for 5h and then shall be flexed incold 5.9 Test for Extractable in Hose chamberthrough 180°from centreline toadiameter of 10times the maximum OD of hose. The flexing shall 5.9.1 Apparatus and Reagents takeplace within 4 sandthe hose shall not fracture or a) Reference Fuel C (50 Toluene –50 iso- showany cracks, checks, and breaks intube or cover. octane percent by volume), Proof pressure of 0.68 IvlPa may be applied to b) Methanol 99percent minimum purity, determine tube damage. c) Gooch crucible, Forstraighthoseabove 19.05mmIDandallpreformed d) Glassfibre filter, Grade 934AH, hose, six specimens of 100 x 6 mm from whole hose e) Beaker, wall shall be prepared. One set of 3 shall be unaged andothershallbeagedinOilNo.3[seeIS3400(Part6)] f) Heating unit, and for 70h at required temperature (see Tables 1to 3). g) Metal control rod and end plugs (see Fig. 1 The unaged set shall be conditioned at–40 &2°Cfor andTable4} 2 IS 15722:2006 $+ Table 1 Requirements for CNG Low-Pressure Fuel Lines (Class 1) (Clauses 5.1 and 5.2) Specification ColdFlex DryHeat Fuel Oil T Resistance Resistance Resistance I (1) (2) (3) (4) (5) — Ageingtemperature“,C 100 I 100 23 I 100 —— I — Coldtemperature“,C -34 — — . — Tube — — Tensilechange,percent — -20 -45 -40 —— I — Elongationchange,percent — -50 -45 -40 Volumechange,percent — — oto+50 –5to+25 I Cover Tensilechange,percent — -20 — l— — Elongationchange,percent — -50 —— I —— Volumechange,percent — — Extractable — — 7.75 I Permeation—FuelC,8Daystotal,g/m2 . I — fi —, 600 Table 2 Requirements for CNG Low-Pressure Fuel Lines (Class 2) (Clauses 5.1 and 5.2) Specification ColdFlex Dry Heat Fuel Oil Extractable Permeation Resistance Resistance Resistance #m’ Max Rate/24h (1) (2) (3) (4) (5) (6) (7) AgeingTemperature,‘C 125 125 23 125 . . ColdTemperature,“C -34 — . — — — Tube Tensilechange,percent — -20 -45 –50 — — Elongationchange,percent — -60 -45 -50 — Volumechange,percent — — oto+50 -5 to+30 : . Cover Tensilechange,percent — 20 — — — — Elongationchange,percent — 60 — — — — Volumechange,percent — — — oto+75 — Extractable — — — 5;0 Permeation—FuelC,8Daystotal,#m2 — — — — — 550 Table 3 Requirements for CNG Low-Pressure Fuel Lines (Class 3) (Clauses 5.1 and 5.2) Speeitlcation ColdFlex DryHeat Fuel 011 Extractable Permeation Resistance Resistance Resis@nce gfm’ Max Rate/24h (1) (2) (3) (4) (5) (6) (7) Ageingtemperature,‘C 150 150 23 150 — — Coldtemperature,‘C -40 — — — — — Tube Tensilechange,percent — -25 -35 -20 — — Elongationchange,percent — -50 -35 -50 — — Volumechange,percent — — oto+35 –5to+15 — — Cover Tensilechange,percent — -25 — — — — Elongationchange,percent — -50 — — — — Volumechange,percent — — — oto+15 — — Extractable — — — — 2.50 — Permeation—FuelC,8Daystotal,g/m2 — — — — . 200 3

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