BS ISO 16964-2015 Gas cylinders Flexible hoses assemblies Specification and testing《气瓶 柔性软管组件 规格和试验》.pdf

1、BSI Standards PublicationBS ISO 16964:2015Gas cylinders Flexible hosesassemblies Specification andtestingBS ISO 16964:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16964:2015.The UK participation in its preparation was entrusted to TechnicalCommittee PVE

2、/3/1, Gas containers - Valve fittings for gas containers.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The Brit

3、ish Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 75508 8ICS 23.020.30; 83.140.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee o

4、n 31 October 2015.Amendments/corrigenda issued since publicationDate Text affectedBS ISO 16964:2015 ISO 2015Gas cylinders Flexible hoses assemblies Specification and testingBouteilles gaz Flexibles Spcifications et essaisINTERNATIONAL STANDARDISO16964First edition2015-09-15Reference numberISO 16964:

5、2015(E)BS ISO 16964:2015ISO 16964:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mecha

6、nical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, Swit

7、zerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 16964:2015ISO 16964:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Requirements 24.1 Production pressure tests . 24.1.1 Strength test . 24.1.2 Leak test 24.2 Type tests

8、. 24.2.1 General 24.2.2 Burst pressure test (3 samples per type) . 24.2.3 Pressure cycle test (3 samples per type) 34.2.4 Oxygen compatibility test (3 samples per type). 44.2.5 Acetylene compatibility test (3 samples) . 44.2.6 Gas material compatibility 44.2.7 Test of the safety cable (2 samples) 44

9、.2.8 Additional tests (see Annex A) . 45 Marking 6Annex A (normative) Examples of kink test, side impact test and torsion test . 7Bibliography .13 ISO 2015 All rights reserved iiiContents PageBS ISO 16964:2015ISO 16964:2015(E)ForewordISO (the International Organization for Standardization) is a worl

10、dwide 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 the right to be represented on

11、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.The procedures used to develop this do

12、cument and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Direct

13、ives, Part 2 (see www.iso.org/directives).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. Details of any patent rights identified during the developm

14、ent of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO spec

15、ific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 58, Gas cylinders,

16、Subcommittee SC 2, Cylinder fittings.iv ISO 2015 All rights reservedBS ISO 16964:2015ISO 16964:2015(E)IntroductionFlexible hose assemblies are used to transfer industrial and medical gases into cylinders, bundles and trailers and also to supply such gases to user equipment.There is a range of existi

17、ng International Standards to be used for specific applications or hose construction: ISO 14113 which covers hoses made with internal rubber or plastics tubing and used to supply gases to customers for welding applications; ISO 21969 which covers hoses with an internal corrugated metallic liner and

18、used to supply medical gases to customers; ISO 10380 which covers hoses with internal corrugated metallic liner for all applications including non-industrial and medical gases.ISO 14113 and ISO 21969 cover only specific customer applications and are intended to be used accordingly, while ISO 10380 i

19、s general in its approach.The purposes of this International Standard are: to provide the specification and testing requirements for high pressure flexible hose assemblies intended to be connected at filling pressure to cylinders, cylinder bundles or trailers for use when filling and emptying gas at

20、 production sites and also where the customer is connecting directly to the cylinder valve, e.g. a cylinder to manifold connection to cover the applications not described by the above International Standards, (flexible hose assemblies for filling centres, flexible hose assemblies for all customer ap

21、plications), to specify a new range of testing requirements which will more effectively evaluate the ability of flexible hose assemblies to remain safe in operation. These test requirements replace the traditional reliance on having a high ratio between rated pressure and burst pressure. ISO 2015 Al

22、l rights reserved vBS ISO 16964:2015BS ISO 16964:2015Gas cylinders Flexible hoses assemblies Specification and testing1 ScopeThis International Standard provides specification and testing requirements for high pressure flexible hose assemblies intended to be connected to gas cylinders, bundles of cy

23、linders or trailers for use when filling and emptying gas at production sites and also for customer use. This International Standard applies to flexible hose assemblies with rated pressures up to 1 000 bar for use in the temperature range of 40 C to +65 C.This International Standard is not applicabl

24、e to: rubber and plastics flexible hose assemblies for welding, cutting and related processes up to 45 MPa (450 bar) for customer use (see ISO 14113); high pressure flexible hose assemblies for use with medical gas systems for customer use (see ISO 21969); low pressure hose assemblies for use with m

25、edical gases, for customer use (see ISO 5359); rubber and thermoplastic low pressure hose assemblies for welding, cutting and related processes for customer use (see ISO 3821 or ISO 12170); flexible hose assemblies for cryogenic applications (see ISO 21012); flexible hose assemblies for liquid petro

26、leum gas (LPG).NOTE Flexible hose assembly designs which pass the type test approval test described in this International Standard can have a lower ratio of burst pressure to rated pressure than stated in other standards.2 Normative referencesThe following documents, in whole or in part, are normati

27、vely 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 document (including any amendments) applies.ISO 148-1, Metallic materials Charpy pendulum impact test Part 1:

28、 Test methodISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testingISO 10286, Gas cylinders TerminologyISO 10380, Pipework Corrugated metal hoses and hose assembliesISO 14113:2013, Gas welding equipment Rubber and plastics hose and hose assemblies for use with industrial gases up

29、 to 450 bar (45 MPa)ISO 21969:2009, High-pressure flexible connections for use with medical gas systems3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 10286, ISO 1402, ISO 14113, ISO 10380, ISO 21969 and the following apply.INTERNATIONAL STANDARD ISO

30、16964:2015(E) ISO 2015 All rights reserved 1BS ISO 16964:2015ISO 16964:2015(E)3.1rated pressurePRrated pressure of a hose assembly is equal to: PR = 1,25 PW, PW being the working pressure of the cylinder as defined in ISO 10286Note 1 to entry: National and international design codes for pressure sys

31、tems can specify a higher value of rated pressure.Note 2 to entry: When cylinders are filled or emptied, the gas temperature could be higher than 15 C. This is the reason why the rated pressure is higher than the cylinder working pressure.3.2burst pressurehighest pressure reached in a flexible hose

32、assembly during a burst test4 Requirements4.1 Production pressure tests4.1.1 Strength testEach flexible hose assembly shall first be subjected to a strength test using oil-free water at a pressure at least equal to 1,5 times the rated pressure, PR, for a minimum of 3 min. There shall be no visible s

33、ign of leakage, permanent deformation or other sign of failure. Where hydraulic testing would result in unacceptable contamination of the flexible hose assembly, the hydraulic test may be replaced by a pneumatic test using a compatible medium such as dry oil-free air or nitrogen. Appropriate safety

34、measures shall be taken to protect personnel and equipment during testing.4.1.2 Leak testThe flexible hose assembly shall be leak tested by pressurizing at PR with compressed dry oil-free air, nitrogen or other test gases. The leak rate shall be less than 6 cm3/h.4.2 Type tests4.2.1 GeneralAll test

35、samples shall be manufactured to the same design, material specification and from the same batch of raw material. Records of the tests performed are to be retained by the flexible hose assembly manufacturer.To carry out the tests described in this International Standard, it is recommended that the n

36、ominal length of hose between end fittings be 1 000 mm unless otherwise specified.Before being type tested, all sample flexible hose assemblies shall be subjected to production pressure tests as specified in 4.1.For hoses to be used in hydrogen or helium service, the leak test in 4.1.2 shall be carr

37、ied out using helium.Tests shall be performed at ambient temperature.4.2.2 Burst pressure test (3 samples per type)The flexible hose assembly complete with safety cable and clamps (if applicable), is to be hydraulically pressurized until burst occurs. The pressurization rate shall be adjusted at the

38、 beginning of the test to be approximately constant and to reach the burst pressure in not less than 1 min.2 ISO 2015 All rights reservedBS ISO 16964:2015ISO 16964:2015(E)The burst pressure of the flexible hoses assemblies shall not be less than 3 PR for a value of PR less than 480 bar and (2 PR) +

39、480 bar for a value of PR greater than or equal to 480 bar.If compliance is required with ISO 21969:2009, 6.2.3, a 5 min hold step at 3 PW, where PW is the working pressure, should be performed.NOTE For acetylene service, hose with a higher burst pressure can be necessary in order to pass the decomp

40、osition test described in 4.2.5 for acetylene flexible hose assemblies. The minimum burst pressure for this type of hose is to be stated by the hose manufacturer.4.2.3 Pressure cycle test (3 samples per type)4.2.3.1 GeneralThe flexible hose assembly complete with safety cable and clamps (if applicab

41、le) shall be submitted to a hydraulic pressurization endurance test from a nominal atmospheric pressure (5 bar maximum) to the PR at a frequency of no more than 30 cycles per minute.A pressure cycle consists of a pressure increase starting from a pressure not more than 5 bar to PR and a pressure dec

42、rease from PR back to the start condition.This endurance test shall not apply to acetylene flexible hose assemblies because the construction of these hoses is designed to resist extremely high pressure and stress compared to acetylenes low working pressure PW.4.2.3.2 General requirementIt shall be c

43、hecked that the entire flexible hose assembly is exposed to a pressure cycle where the maximum pressure is the rated pressure (PR) and the minimum of each pressure cycle is no more than 5 bar. The flexible hose assemblies shall not leak or burst during the test: Category A: 5 000 pressure cycles for

44、 flexible hose assemblies dedicated to non-filling applications such as customer installations. This applies to flexible hose assemblies with metallic and non-metallic liners. Category B: 50 000 pressure cycles for flexible hose assemblies with non-metallic liners dedicated to filling centres.4.2.3.

45、3 Specific requirements for metallic hoses used in filling centresThe pressure cycle test shall be performed on hose assemblies with a maximum of 50 000 cycles. No failure should occur before 10 000 cycles.A simple leak is accepted above 10 000 cycles, but in such cases the life of the hose shall be

46、 limited proportionally to its performance in this hydraulic pressure cycling test.Hoses not able to pass the 10 000 pressure cycles minimum requirement, but demonstrating by this test a non-hazardous failure mode, can be used in service following risk assessment provided that the risk assessment in

47、cludes as a minimum: the definition of a specific application; the mode of failure of the hose and any mitigation; the associated risk created by the escape of gas; the protection of personnel.Following such risk assessment the life span for the hose can be determined (e.g. use for a given time or u

48、ntil the flexible hose assembly leaks). ISO 2015 All rights reserved 3BS ISO 16964:2015ISO 16964:2015(E)If the test has been completed before any leak has been detected (e.g. after 50 000 cycles) then the flexible hose assembly shall be pressurized at PR with compressed dry oil-free air or nitrogen

49、to check for leaks. The leak rate shall be less than 6 cm3/h. For hoses to be used in hydrogen or helium service, the leak test shall be carried out using helium.4.2.4 Oxygen compatibility test (3 samples per type)This test shall be performed for all oxygen applications. Follow the procedure given in ISO 21969:2009, 6.2.4.4.2.5 Acetylene compatibility test (3 samples)This test shall be performed for all acetylene applications. Follow the procedure given in ISO 14113:2013, 7.1.2.Flexible hose assemblie