IS 15720: Road vehicles - Compressed natural gas (CNG) fuel system components - Compartments/sub-compartments

2008·3.9 MB·English

by  Bureau of Indian Standards

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 15720 (2008): Road vehicles - Compressed natural gas
(CNG) fuel system components -
Compartments/sub-compartments [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”

IS 15720 :2008

-rrn
~ ~ ~ (~)
qw:r -
~~ ~OllcYlT cB- E1ccp - ~/BLr-~
Indian Standard
ROAD VEHICLES - COMPRESSED NATURAL GAS
(CNG) FUEL SYSTEM COMPONENTS
COMPARTMENTS/SUB-COMPARTMENTS
ICS 43.060.40
© SIS 2008
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002
JUlie 2008 PriceGroup2
Automotive Vehicles Runningon Non-conventional Energy SourcesSectional Committee,TED26
FOREWORD
ThisIndianStandardwasadoptedby the Bureauof Indian Standards. afterthe draft finalized bytheAutomotive
VehiclesRunning onNon-conventionalEnergy SourcesSectionalCommittee had beenapprovedbytheTransport
EngineeringDivisionCouncil.
Inthe formulation ofthisstandardconsiderable assistance has beenderived from the following AIS Standards
issued bytheAutomotive ResearchAssociationofIndia:
AIS024(Arndt4toVersion3)Safetyandproceduralrequirementsfor type approvalofCNGoperatedvehicles
AIS028 (Version 3)Codeofpracticefor useofCNG fuel in internalcombustion engine vehicles
Thisstandard isoneoftheseriesofIndianStandardspublishedon CNGonboardfuel systemcomponents.Other
standardsinthis seriesare:
ISNo. Title
15710:2006 Road vehicles - Compressed natural gas (CNG) fuel system components - General
requirementsand definitions
15711:2006 Road vehicles- Compressed natural gas (CNG)fuel systemcomponents- Performanceand
general test methods
15712:2006 Road vehicles - Compressed natural gas (CNG)fuel systemcomponents- Automatic valve
15713:2006 Roadvehicles- Compressednatural gas (CNG)fuelsystemcomponents- Pressureregulator
15714:2006 Road vehicles- Compressed natural gas (CNG)fuelsystemcomponents- Gas/Airmixer
15715:2008 Roadvehicles- Compressednaturalgas(CNG)fuelsystemcomponents- Conduit(ventilation
hose)
15716:2006 Roadvehicles- Compressednatural gas(CNG)fuelsystemcomponents- CNGhighpressure
fuel line(rigid) withend connections(having pressure exceeding2.15 MPa)
15717:2006 Road vehicles- Compressed natural gas (CNG) fuel system components - Petrol solenoid
valve
15718: 2006 Roadvehicles- Compressednaturalgas(CNG)fuelsystemcomponents- CNGhighpressure
fuel line(flexible hose) with endconnections(having pressure exceeding2.15 MPa)
15719:2006 Road vehicles- Compressednaturalgas (CNG)fuel systemcomponents- Electrical wiring
kit
15721:2006 Road vehicles - Compressed natural gas (CNG) fuel system components - Fire retardant
material for seat, upholstery, roofand side lining
15722:2006 Road vehicles - Compressednatural gas(CNG)fuelsystemcomponents- CNGlowpressure
flexible fuel line with or withoutend connections(having pressure not exceeding 2.15 MPa)
15723:2006 Road vehicles- Compressednatural gas (CNG)fuel system components- Current limiting
devices
Thecompositionof the Committeeresponsiblefor the formulation of this standard isgiven inAnnex B.
Forthe purposeofdeciding whethera particularrequirementofthisstandard iscomplied with, the final value.
observedorcalculated.expressingtheresultofatestoranalysis,shall beroundedoffinaccordancewithIS2 :1960
'Rulesforroundingoffnumericalvalues(revised)'.Thenumberofsignificantplacesretained inthe roundedoff
valueshould bethesame as that ofthe specifiedvalue inthis standard.
AMENDMENT NO. 1 JUNE 2012

TO

IS 15720 : 2008 ROAD VEHICLES — COMPRESSED

NATURAL GAS (CNG) FUEL SYSTEM COMPONENTS —

COMPARTMENTS / SUB-COMPARTMENTS

(First cover page and page 1) — Substitute the following for the existing
title:

‘भारतीय मानक

सड़क वाहन – संपी(cid:465)डत (cid:292)ाकृितक गैस (सीएनजी) तथा (cid:289)(cid:466)वत पे(cid:282)ोिलयम गैस

(एलपीजी) (cid:579)धन (cid:292)ाणाली के घटक — को(cid:437)/उप-को(cid:437)

Indian Standard

ROAD VEHICLES — COMPRESSED NATURAL GAS (CNG) AND
LIQUEFIED PETROLEUM GAS (LPG) FUEL SYSTEM
COMPONENTS – COMPARTMENTS/SUB-COMPARTMENTS’

(Second cover page, Foreword) — Add the following at the end of second
para:

‘AIS 025: Safety and procedural requirements for type approval of LPG
operated vehicles

AIS 026: Code of practice for the use of LPG fuel in internal combustion engine
to power 4 wheeled vehicles and heavy motor vehicles

AIS 027: Code of practice for the use of LPG fuel in internal combustion engine
to power 2 and 3 wheeled vehicles’

(Page 1, clause 1.1) — Substitute ‘CNG/LPG’ for ‘CNG’

(Page 1, clause 1.1.1) — Substitute ‘CNG/LPG’ for ‘CNG’ and
‘compressed natural gas/liquefied petroleum gas’ for ‘compressed natural gas’.

1
Amend No. 1 IS 15720 : 2008

[Page 1, clause 1.1.2(d)] — Substitute ‘CNG/LPG’ for ‘CNG’.

(Page 1, clause 1.1.3) — Substitute the following for the existing:

‘This standard is based upon a service pressure for compressed natural gas as a
fuel at 20 MPa (200 bar) and liquefied petroleum gas as a fuel at 1 MPa (10
bar) settled at 15oC.’

(Page 1 clause 4.2) — Substitute ‘pliable material (non-metallic material)’
for ‘pliable material’.

(Page 2, clause 5.1) — Substitute the following for the existing:

‘5.1 Each compartment/sub-compartment shall be legibly and indelibly marked
with the following:

a) Manufacturer’s name or trade-mark or symbol;
b) Part No. or unique identification mark; and
c) Date of manufacturer or Batch No.

NOTE — Marking for compartment/sub-compartment shall be applicable if it is a
separate component.’

(Page 2 clause 5.2) — Substitute ‘CNG/LPG’ for ‘CNG’.

[Page 2 clause 6(d)] — Substitute the following for the existing:

‘Drawings with relevant dimensions and materials.’

(TE D 26)
Reprography Unit, BIS, New Delhi, India

2
IS 15720 :2008
Indian Standard
ROAD VEHICLES - COMPRESSED NATURAL GAS
(CNG) FUEL SYSTEM COMPONENTS
COMPARTMENTS/SUB-COMPARTMENTS
1SCOPE 3DEFINITIONS
1.1 This standard specifies definitions, test methods For the purposeof thisstandard. following definition
andrequirementsofcompartments/sub-compartments inadditionto thosegiven in IS 15710shallapply.
ofCNGonboardfuelsystemcomponentsintendedfor
3.1Self-Extinguishing/NoBumRate(SF/NBR)-The
useon motor vehiclesdefined inIS14272 (Part 1).
materialstopsburning before ithasburnt for60sfrom
1.1.1This standard is applicable to CNG fuel system thestartoftiming andhasnotburnt morethan50.8mm
components intended to be used on vehicles using (2in)fromthepointwhere thetiming wasstarted.
compressed natural gas (mono-fuel or bi-fuel
4TYPETESTS(TYPEAPPROVAL)
applications).
1.1.2It isnot applicable to the following: 4.1 Construction
a) Liquefied Natural Gas (LNG) fuel system 4.1.1Hatches,coversorconstructionjoints,whichmay
components located upstream of, and need tobeopened or dismantled during maintenance
including, the vaporizer; orinspection,shall becapableofbeing openedatleast
b) Fuel containers; 10times withoutadverse effects on durability.
c) Stationarygas engines;and
4.1.2 Hingesand lockingdevicesofhatches andcovers
d) CNG fuel systems components for the
shall be designed to prevent the dislodgment of the
propulsion ofmarinecraft.
hatch orcoverwhen intheclosedand locked position.
1.1.3This standard isbased upon aservice pressure for
4.1.3 The construction of compartments/sub
compressed natural gas as a fuel at 20 MPa (200 bar)
compartments shall be such that when subjected toa
settled at 15°C. Other service pressures could be
pushing force of60 kgf applied at any point on any
accommodated by adjusting the pressure by the
external face of the sub-compartment, any resultant
appropriate factor (ratio). Forexample, a 25 MPa (250
damageshall not be of a natureto permitgas leakage
bar)servicepressuresystemwillrequire pressurestobe
intheeventofpressuretestingasper4.3.The pushing
multiplied by 1.25.All references to pressure are tobe
forceshallbeapplied byameasuringinstrument having
considered gauge pressures unlessotherwisespecified. a flatcircularface of20 mm diameter.
2REFERENCES
4.2 Material
The following standards contain provisions which, Thepliablematerialofcompartments/sub-compartments
through reference in this text constitute provisions of shallbesufficientlystrongtoresistmechanical damage,
this standard. At the time of publication the editions preserveventing integrity,shall notsupportcombustion
indicatedwerevalid.Allstandardsaresubject torevision and shall meet the following minimumcriteria.
and parties to agreements based on this standard are
4.2.1 ResistancetvColdCracking
encouragedtoinvestigatethepossibilityofapplyingthe
mostrecenteditionsof thestandardsindicated below: The material shall withstand a bend of 1800 applied
within 0.5 s around a 6 mm diameter former at
ISNo. Title
temperature-35°C withoutcracking.
14272 Automotive vehicles - Types
(Part I) : 1995 Terminology :Part IThreeand four 4.2.2 Flammability Test
wheelers When tested for Horizontal Burning Rate as per
15061:2002 Automotive vehicles Annex A of IS 15061, the material shall be
Flammabilityrequirements Self-Extinguishing/NoBurn Rate (SElNBR).
15710:2006 Road vehicles - Compressed
NOTE-Ifthesizeofcomponentisinsufficientfordrawalof
natural gas (CNG) fuel system
sampleasper standard, then the samplesizeshallbeselected
components Genera l
as per mutual agreement between the lest agency and lhe
requirementsand definitions manufacturer.
IS15720 :2008
4.2.3Resistance 10UltravioletDegradation 6TECR."UCALINFORMA1l0NTOBESU8MITfED
BYTHECOMPONENTMANUFACTURER
WhentestedasperAnnexA.presenceofstabilizerfor
Technical informationtobesubmittedbythecomponent
ultraviolet degradation shall be confirmed.
manufacturer for component type approval/type test
4.3HydrostaticTest shallcontain atleastthefollowingtechnicalinformation:
a) Manufacturer'sname, trade-markorsymbol;
When a compartment/sub-compartment has been
subjected to hydrostatic internal pressure of 30 kPa b) Part No. or unique identification mark;
(0.3bar)appliedfor5min,sealingmaterialsorgaskets c) Model/Type No: and
shallnotbedisplacedorotherwiseloseintegrity during d) Drawings:Detailed dimensional drawing of
thetest. thecompartment/sub-compartmentinA3size
in duplicate shall contain information like
5MARKING drawing No.. Rev. No..part numbers,billof
material (comprising part numbers of
5.1 The compartment/sub-compartment shall be
individualitems,genericname and compound
permanently marked with:
number for non-metallic parts). and details
a) Manufacturer'sname,trade-markorsymbol; ofthe markingonthe componentwithproper
authentication.
b) Part No. or Unique Identification Mark;
c) Date of manufactureor batchnumber;and 7NUMBEROFSAMPLESFORTESTING
d) ISNumberof this standard. Minimum two numbers of compartments/sub
compartmentsshall beprovidedwith suitableadaptors/
5.2BISCertificationMarking
plugs for itsopeningto the test agency for testing.
Eachcompartment/sub-compartmentofeNGvehicles
8CHANGESINTECHNICALSPECIFICATIONS
mayalso bemarked with the Standard Mark.
OF A TYPE APPROVED COMPONENT AND
EXTENSIONOFAPPROVAL
5.2.1The useoftheStandardMarkisgovernedby the
provisionsoftheBureauofIndian StandardsAct,1986 Any modification intechnical specificationofalready
and the Rules and Regulations made thereunder. The type approved component shall require re-type test/
details of conditions under which the licence for the extension ofapproval at the discretionoftest agency,
useofStandardMarkmaybegrantedtomanufacturers based on the justification provided by the component
or producers may be obtained from the Bureau of manufacturerand reviewed by the test agency, which
Indian Standards. has granted type approval.
ANNEXA
(Clause 4.2.3)
TESTMETHODTO DETERMINETHEPRESENCEOFULTRAVIOLET
DEGRADATIONAGENT(UVSTABILIZER)
A-I SCOPE Additives Library such as Saddtler, FDM, Nicolet,
RAPRA or any otherlibrary spectra.
This test method is intended to provide a general
technique to determine the presence of ultraviolet
A-3APPARATUS
degradation agent (UY stabilizer) present in the
samples. This method is useful in performing a Fourier transform infrared spectrometer, with wave
qualitative analysis.
numberrange of7 800to 350crn".
A-2SUMMARY OFTHETESTPROCEDURE
A-4 REAGENTS
This test method consists of a method in which the
Acetone.
acetone extractof.thesampleundertest ispreparedin
theformofthinfilmorcapillaryfilmand itsspectrum
A-5 PROCEDURE
iscollected over IR range of 4 000 to 400em". The
spectrum is then compared with any internationally The representativetestquantityofsampleisextracted

available library, such as Atlas of Hummel Polymer with acetonesolventfor 16h.Theextractisdried and
Library spectra or with the Enhanced Polymer then subjectedto FfIRspectrometertest.
2
IS15720 :2008
The sample prepared from the above techniques is d) Backgroundspectrum iscollectedwithoutthe
mounted to a suitable sample holder and kept inside sample inthe compartment.
sample compartment of optical bench of IR e) The sample spectrum is collected with the
spectrometer and its infrared spectrum is collected prepared sample in the compartment after
keeping the following instrumental parameters collecting backgroundspectrum.
according tothe nature of the sample:
f) The sample spectrum collected is baseline
a) Theenvironmentalconditionsforequipment correctedandnormalizedtocomparewiththe
aremaintained.They areasfollows: standard spectrum from the library using
search commands.
I) Room temperature:O°Cto35°C,and
2) Relative humidity: 20 percent to 80 A-6REPORT
percent.
The obtained FTIR spectrum is searched in any
b) The optical bench is switched on and is internationally available library, such as Atlas of
allowed toinitialize. HummelPolymerLibraryspectraorwiththeEnhanced
c) Theresolution isset to4.0ern", No.ofscans Polymer Additives Library such as Saddtler, FDM,
to40,ApodizationtoHapp-Ganzelandwave Nicolet, RAPRA or any otherlibrary spectra for best
numberrange from 4 000 to400 ern". matching spectrum ofultravioletstabilizer.
ANNEX B
(Foreword)
COMMITTEECOMPOSITION
Automotive VehiclesRunningon Non-conventional Energy Sources Sectional Committee,TED 26
Organization Representativetst
Automotive Research Association of India. Pune SHRI SHRIKANT R. MARATHE (Chairman)
Ashok Leyland Ltd. Chennai SHRI NIRMAL KUMAR
SHRI G. VISWANATHAN (Altemate)
Automotive Research Association ofIndia. Pune SHRI M. K. CHOUDHARI
SHRI A. B. KOMAWAR (Alternate)
Bajaj Auto Ltd. Pune SHRJTAPAN BASU
SHRI T.M. BALARAMAN (Alternate)
Batra Associates Limited. Faridabad SHRI N. K. SAWHNEY
Bharat Heavy Electicals Ltd. Bangalore SHRI J. B. D'SOI'ZA
SHRI P.S. CHOPRA (Alternate)
Bharat Petroleum Corporation Ltd. Mumbai SHRI R. N. DAS
SHRI N. DASGUPTA (Alternate)
Bombay Environmental Action Group. Mumbai SHRI DEBI GOENKA
Central Institute of Road Transport. Pune SHRJG. K. SHARMA
SHRI D. P.SASTE (Alternate)
Central Pollution Control Board. Delhi SHRI T. VENL'GOPAL
SHRI Ro\JESHDEBROY(Alternate)
Centre for Science and Environment. New Delhi SHRIMATI A!'lUMITA Roy
SHRI CHIRAG SHAH (Alternate)
Force Motors Ltd, Pune SHRI S. B. PEnlE
SHRI S. V.VIDHW~NS (Alternate)
GAIL (India) Limited, New Delhi SHRI S. P.SHARMA
SHRI RANVEER SINGH (Alternate)
GujaratGas Company Limited. Surat SHRI M. I. VAKHARWALA
SHRI B. D. JOSHI (Alternate)

Hindustan Motors ltd, Sagore SHRI S.Y. RAO
RTV-ENGINEERING (GENERAL) (Alternate)
3