1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 19078:2013Gas cylinders Inspection ofthe cylinder installation, andrequalification of high pressurecylinders for the on-boardstorage of natural gas as a fuelfor automotive
2、 vehiclesBS ISO 19078:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 19078:2013. It supersedes BS ISO 19078:2006 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PVE/3/7, Gas containers - Gas cylinder (recept
3、acle) operations.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Publi
4、shed by BSI Standards Limited 2013ISBN 978 0 580 66707 7 ICS 23.020.30; 43.060.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2013.Amendments issu
5、ed since publicationDate T e x t a f f e c t e dBS ISO 19078:2013 ISO 2013Gas cylinders Inspection of the cylinder installation, and requalification of high pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehiclesBouteilles gaz Inspection de linstallation des bout
6、eilles, et requalification des bouteilles haute pression pour le stockage du gaz naturel, utilis comme carburant, bord des vhicules automobilesINTERNATIONAL STANDARDISO19078Second edition2013-01-15Reference numberISO 19078:2013(E)BS ISO 19078:2013ISO 19078:2013(E)ii ISO 2013 All rights reservedCOPYR
7、IGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below o
8、r ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 19078:2013ISO 19078:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv
9、Introduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Background information 44.1 General . 44.2 Cylinder types and descriptions 44.3 Required marking information . 55 Inspection body and inspectors 56 Inspection equipment . 67 Cylinder, valve and pressure relief device inspe
10、ction 67.1 Inspection interval . 67.2 Conditions requiring immediate inspection 67.3 Preparation for inspection 77.4 Cylinder inspection . 87.5 Additional inspection of metal cylinders CNG-1 and metallic areas of CNG-2, CNG-3 and the metal bosses of CNG-4 137.6 Additional inspection requirements for
11、 composite cylinders (CNG-2, CNG-3 and CNG-4) 157.7 Valve and pressure relief device inspection 167.8 Cylinder marking 177.9 Cylinder inspection record/checklist . 187.10 Cylinder final acceptance/rejection . 187.11 Component final acceptance/rejection . 198 Installation and mounting inspection .208
12、.1 Installation and mounting of Natural Gas Vehicle fuel cylinders .208.2 Cylinder installation inspection 209 Condemned cylinders .229.1 General 229.2 Condemned cylinders 229.3 Destruction process . 22Annex A (informative) Depressurization and purging of CNG fuel cylinders 24Annex B (informative) C
13、onditions and usage that may warrant more frequent inspections .26Annex C (informative) Inspection checklist example .27Annex D (informative) Considerations for hydrostatic test and internal inspection .29Bibliography .31BS ISO 19078:2013ISO 19078:2013(E)ForewordISO (the International Organization f
14、or Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has th
15、e right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.Internati
16、onal Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication a
17、s an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO
18、 19078 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4, Operational requirements for gas cylinders.This second edition cancels and replaces the first edition (ISO 19078:2006), with the following main technical revisions:a) The scope clarifies the rework of some types
19、of rejected cylinders;b) The periodicity of inspection has been removed from this International Standard. The user is referred to the requirements of ISO 11439 for this information;c) Damage levels and criteria are more clearly defined and better align with ISO 11439;d) Clause 7.11 was renamed to be
20、tter clarify its intent;e) Table 2 includes acceptance and rejection conditions for gas tight housing;f) Reference to ISO 25760 for valve removal has been added; andg) Annex A, Inspector qualifications (informative), and Annex F, Composite matrix (informative), were removed.iv ISO 2013 All rights re
21、servedBS ISO 19078:2013ISO 19078:2013(E)IntroductionThis International Standard sets out requirements regarding the periodic visual examination and inspection of natural gas fuel cylinders installed in vehicles and the condition of their installation. These cylinders are designed to store natural ga
22、s at high pressures.Where there is any conflict between this International Standard and any applicable regulation, the regulation always takes precedence. ISO 2013 All rights reserved vBS ISO 19078:2013BS ISO 19078:2013Gas cylinders Inspection of the cylinder installation, and requalification of hig
23、h pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles1 ScopeThis International Standard specifies the requirements for the inspection, installation and requalification of high pressure cylinders, designed and manufactured in accordance with the requirements o
24、f ISO 11439, for the on-board storage of natural gas as a fuel for automotive vehicles.It provides criteria, in the absence of guidance from the cylinder or vehicle manufacturer, for the acceptance (including any allowed rework) or rejection (including any allowed rework or destruction) of a cylinde
25、r and its installation.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen
26、t (including any amendments) applies.ISO 11439, Gas cylinders High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehiclesISO 15500-13, Road vehicles Compressed natural gas (CNG) fuel system components Part 13: Pressure relief device (PRD)ISO 15500-15, Road vehic
27、les Compressed natural gas (CNG) fuel system components Part 15: Gas-tight housing and ventilation hoseISO 15501-1, Road vehicles Compressed natural gas (CNG) fuel systems Part 1: Safety requirementsISO 15501-2, Road vehicles Compressed natural gas (CNG) fuel systems Part 2: Test methodsISO 25760, G
28、as cylinders Operational procedures for the safe removal of valves from gas cylinders3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1abrasiondamage to an area of the cylinder or its installation equipment caused by scraping, wearing, vibration o
29、r rubbing away of the material by frictionNote 1 to entry: Abrasion can be the result of many cycles of something rubbing lightly on the surface of the cylinder or its installation equipment, or due to a few cycles, perhaps only one, of heavy rubbing.3.2impactblow to the surface of the cylinder that
30、 can significantly damage and/or indent the surface (e.g. cutting, gouging)Note 1 to entry: Impact can also induce such damage as delaminations, which are not readily apparent through visual examination.INTERNATIONAL STANDARD ISO 19078:2013(E) ISO 2013 All rights reserved 1BS ISO 19078:2013ISO 19078
31、:2013(E)3.3componentparts that are used directly in conjunction with the installation of the fuel container to include the cylinder, valve, pressure relief device (PRD), vent and mounting3.4condemnedcylinder or piece of its installation equipment no longer fit for service and for which repair is not
32、 allowed3.5crazinghairline cracking of the resin, giving it an opaque, frosty appearance3.6cutdamage caused by a sharp object coming into contact with the cylinders surface3.7delaminationform of composite damage, in which a separation develops between layers of the composite3.8destroyedcylinder or p
33、iece of its installation equipment in a state that makes it physically unusable for its purpose3.9domecurved end portion of the cylinder3.10external coatingsurface treatment applied to the cylinder for environmental protection and/or improved appearance3.11gas tight housingenclosure fitted at any po
34、tential leakage points (e.g. cylinder/valve connection or PRD) to collect and vent any leaked gas to outside the vehicle3.12helicalwinding in the longitudinal and circumferential direction on both the cylindrical and dome regions of the cylinderNote 1 to entry: The strands of reinforcing fibres are
35、oriented at an angle to the longitudinal axis of the cylinder.3.13hoop directionhoop patternwinding along the cylindrical portion of the cylinderNote 1 to entry: The strands of reinforcing fibres are oriented at an angle of nearly 90 degrees to the longitudinal axis of the cylinder.3.14inspection bo
36、dyorganization that performs the visual inspection of compressed natural gas (CNG) cylinders used in natural gas vehicles (NGVs)3.15inspectorindividual who is authorized by an inspection body to perform the visual inspection2 ISO 2013 All rights reservedBS ISO 19078:2013ISO 19078:2013(E)3.16inspecti
37、on markstamp, label or tag placed by an inspector on the cylinder indicating acceptance of the cylinder3.17Level 1 damage/conditionminor damage that can occur during normal useNote 1 to entry: Such damage normally has no adverse effects on the safety of the cylinder and its continued use. Scratched
38、paint or nicks that have no appreciable depth in metal, or similar damage in the composite cylinder paint or resin where there are no visible frayed fibres, are considered to be of this level of damage.Note 2 to entry: See Table 1.3.18Level 2 damage/conditiondamage that is more severe than Level 1,
39、but where after repair the cylinder is authorized to return to service, or based upon the recommendations of the manufacturer may be classified as Level 1 or Level 3Note 1 to entry: See 7.4.3 and Table 1.3.19Level 3 damage/conditiondamage that requires a cylinder be condemnedNote 1 to entry: A Level
40、 3 condition is such that the cylinder must be rendered unfit for continued service and cannot be repaired.Note 2 to entry: See Table 1.3.20linerinternal container of the cylinder, which sometimes carries pressure, that prevents leakage of gas through the composite cylinder structure3.21manufacturer
41、cylinder maker, unless otherwise stated3.22markinginformation permanently applied to an item (e.g. stamping and permanent labelling)3.23mounting brackets and/or strapsdevices used to secure cylinders in a vehicle3.24overpressurizationpressurization of the cylinder, which at 15 C results in a settled
42、 pressure that is higher than the working pressure marked on the cylinder, or pressurization of a cylinder to a pressure that is above 26 MPa independent of temperature conditions (for a 20 MPa working pressure cylinder)3.25pressure relief devicePRDdevice that releases the contained gas in specific
43、emergency conditions in accordance with ISO 15500-133.26reinforcing fibrescontinuous fibrous strands in the composite, such as carbon, aramid, glass or combinations thereof, which withstand loads caused by pressurization ISO 2013 All rights reserved 3BS ISO 19078:2013ISO 19078:2013(E)3.27rejected cy
44、linder or installation equipmentcylinder or its installation equipment that needs to be removed from service, i.e. disassembled from the vehicleNote 1 to entry: For Level 2 damage, the cylinder is evaluated further before repairing or condemning. For Level 3 damage, the cylinder or equipment is subs
45、equently condemned.3.28repairaction, including rework, to return a cylinder to an acceptable Level 1 condition3.29resinmaterial that is used to bind and hold the fibres in place3.30working pressuresettled pressure, at a uniform temperature of 15 C3.31stress corrosion crackingSCCphenomenon resulting
46、in a split or rift in the materials, caused by a combination of load and aggressive environmentNote 1 to entry: Such cracks in composite materials are typically sharply defined and can appear as a family of cracks or as a single crack.3.32valvedevice installed in one of the threaded openings of the
47、cylinder used to allow gas flow into or from the cylinderNote 1 to entry: A manual valve is turned on or off with a handle. A solenoid valve is turned on or off automatically. Some solenoid valves can be operated manually with special tools.3.33vent linehigh-pressure line used to conduct gas from a
48、PRD to a location outside the vehicle, where gas can be discharged safely4 Background information4.1 GeneralNGV cylinders inspected in accordance with this International Standard are designed and qualified in accordance with ISO 11439. These cylinders have markings that identify the ISO 11439 type o
49、f construction.An inspection body shall perform all inspection work. Trained and qualified personnel shall perform installations or other service required by this International Standard.4.2 Cylinder types and descriptions4.2.1 CNG-1 metalCNG-1 cylinders are all metal and can be made of any alloy of steel or aluminium that meets the qualification requirements outlined in ISO 11439.4 ISO 2013 All rights reservedBS ISO 19078:2013ISO 19078:2013(E)4.2.2 CNG-2 metal liner partially reinforced with resin-impregnated continuou
