1、BSI Standards PublicationBS ISO 4437-2:2014Plastics piping systems forthe supply of gaseous fuels Polyethylene (PE)Part 2: PipesBS ISO 4437-2:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 4437-2:2014.Together with BS ISO 4437-1:2014, BS ISO 4437-3:2014,
2、and BS ISO 4437-5:2014, it supersedes BS ISO 4437:2007, BS ISO 8085-1:2001, BS ISO 8085-2:2001 and BS ISO 8085-3:2001, which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/88/2, Plastics piping for pressure applications.A list of organizations represen
3、ted 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 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 7
4、7407 2ICS 75.200; 83.140.30Compliance 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 2014.Amendments/corrigenda issued since publicationDate Text affectedBS ISO
5、 4437-2:2014 ISO 2014Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) Part 2: PipesSystmesdecanalisationsenmatiresplastiquespourladistributiondecombustiblesgazeux Polythylne(PE) Partie 2: TuyauxINTERNATIONAL STANDARDISO4437-2First edition2014-01-15Reference numberISO 4437-
6、2:2014(E)BS ISO 4437-2:2014ISO 4437-2:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All 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 mechanical, including photo
7、copying, 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 officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E
8、-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 4437-2:2014ISO 4437-2:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions, symbols, and abbreviations . 24 Material 24.1 Compound for pipes . 24.2
9、Compound for identification stripes 34.3 Recyclable material . 35 General characteristics 35.1 Appearance 35.2 Colour 36 Geometrical characteristics 36.1 Measurement of dimensions . 36.2 Mean outside diameters, out-of-roundness (ovality), and tolerances 36.3 Wall thicknesses and related tolerances .
10、 46.4 Circumferential reversion of pipes with dnequal to or greater than 250 mm 66.5 Coiled pipe 76.6 Lengths 77 Mechanical characteristics 77.1 Conditioning 77.2 Requirements . 77.3 Retest in case of failure at 80 C . 98 Physical characteristics . 98.1 Conditioning 98.2 Requirements 109 Performance
11、 requirements 1010 Marking .1010.1 General 1010.2 Minimum required marking . 11Annex A (normative) Pipes with co-extruded layers 12Annex B (normative) Pipes with peelable layer 14Annex C (normative) Squeeze-off technique .16Bibliography .17BS ISO 4437-2:2014ISO 4437-2:2014(E)ForewordISO (the Interna
12、tional Organization for 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 be
13、en established has the 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 stan
14、dardization.The procedures used to develop this document 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 accorda
15、nce with the editorial rules of the ISO/IEC Directives, 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 o
16、f any patent rights identified during the development 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 endorse
17、ment.For an explanation on the meaning of ISO specific 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 responsib
18、le for this document is ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.This first edition of ISO 4437-2 together with the first editions of ISO 4437-1, ISO 4437-3 and ISO 4437-5 cancel and re
19、place ISO 4437:2007, ISO 8085-1:2001, ISO 8085-2:2001 and ISO 8085-3:2001, of which they constitute a technical revision.ISO 4437 consists of the following parts, under the general title Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) : Part 1: General Part 2: Pipes Part 3:
20、 Fittings Part 4: Valves Part 5: Fitness for purpose of the systemiv ISO 2014 All rights reservedBS ISO 4437-2:2014ISO 4437-2:2014(E)IntroductionThis part of ISO 4437 specifies the requirements for a piping system and its components made from polyethylene (PE), and which is intended to be used for t
21、he supply of gaseous fuels.Requirements and test methods for material and components, other than pipes, are specified in ISO 4437-1, ISO 4437-3, and ISO 4437-4.Characteristics for fitness for purpose of the system are covered in ISO 4437-5.Recommended practice for installation is given in ISO/TS 108
22、39.1This part of ISO 4437 covers the characteristics of pipes. ISO 2014 All rights reserved vBS ISO 4437-2:2014BS ISO 4437-2:2014Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) Part 2: Pipes1 ScopeThis part of ISO 4437 specifies the characteristics of pipes made from poly
23、ethylene (PE) for piping systems in the field of the supply of gaseous fuels.It also specifies the test parameters for the test methods referred to in this International Standard.In conjunction with part of ISO 4437-1, ISO 4437-3, ISO 4437-4, and ISO 4437-5, it is applicable to PE pipes, fittings an
24、d valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions:a) the maximum operating pressure (MOP) is based on the design stress determined from the compound minimum required strength (MRS) divided by the C factor, and taking into
25、account rapid crack propagation (RCP) requirements;b) a temperature of 20 C as reference temperature for the design basis.NOTE 1 For other operating temperatures, guidance is given in ISO 4437-5:2014.For above ground application of pipes conforming to this International Standard, the pipes should be
26、 protected by a casing pipe, taking into account any relevant national regulations and installation practices or codes.This part of ISO 4437 covers three types of pipes: PE pipes (outside diameter dn) including any identification stripes; PE pipes with co-extruded layers on either or both the outsid
27、e and/or inside of the pipe (total outside diameter dn) as specified in Annex A, where all PE layers have the same MRS rating; PE pipes (outside diameter dn) with a peelable and contiguous thermoplastics additional layer on the outside (coated pipe) as specified in Annex B.NOTE 2 It is the responsib
28、ility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.2 Normative referencesThe following documents, in whole or in part, are normatively r
29、eferenced 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 1133-1, Plastics Determination of the melt mass-flow rate (MFR) and
30、 melt volume-flow rate (MVR) of thermoplastics Part 1: Standard methodISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General methodINTERNATIONAL STANDARD ISO 4437-2:2014(E) ISO 2014 All rights r
31、eserved 1BS ISO 4437-2:2014ISO 4437-2:2014(E)ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test piecesISO 2505, Thermoplastics pipes Longitudinal reversion Test method and parame
32、tersISO 3126, Plastics piping systems Plastics components Determination of dimensionsISO 4065, Thermoplastics pipes Universal wall thickness tableISO 4437-1:2014, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 1: GeneralISO 4437-5:2014, Plastics piping systems for the
33、 supply of gaseous fuels Polyethylene (PE) Part 5: Fitness for purpose of the systemISO 6259-1, Thermoplastics pipes Determination of tensile properties Part 1: General test methodISO 6259-3, Thermoplastics pipes Determination of tensile properties Part 3: Polyolefin pipesISO 9969, Thermoplastics pi
34、pes Determination of ring stiffnessISO 11922-1:1997, Thermoplastics pipes for the conveyance of fluids Dimensions and tolerances Part 1: Metric seriesISO 11357-6, Plastics Differential scanning calorimetry (DSC) Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation inducti
35、on temperature (dynamic OIT)ISO 13477, Thermoplastics pipes for the conveyance of fluids Determination of resistance to rapid crack propagation (RCP) Small-scale steady-state test (S4 test)ISO 13478, Thermoplastics pipes for the conveyance of fluids Determination of resistance to rapid crack propaga
36、tion (RCP) Full-scale test (FST)ISO 13479:2009, Polyolefin pipes for the conveyance of fluids Determination of resistance to crack propagation Test method for slow crack growth on notched pipesISO 13968, Plastics piping and ducting systems Thermoplastics pipes Determination of ring flexibilityISO 13
37、480, Polyethylene pipes Resistance to slow crack growth Cone test methodEN 12106, Plastics piping systems Polyethylene (PE) pipes Test method for the resistance to internal pressure after application of squeeze-off3 Terms and definitions, symbols, and abbreviationsFor the purposes of this document,
38、the terms and definitions in ISO 4437-1:2014 and the following apply.4 Material4.1 Compound for pipesThe pipes shall be made from virgin material or own reprocessible material from the same PE compound or a mixture of both materials. Reprocessible material from co-extruded pipes or from pipes reproc
39、essed with the peelable layer attached shall not be used. Own reprocessible material from the base pipe of peelable-layer pipes can be used.The compound(s) from which the pipes are made shall conform to ISO 4437-1:2014.2 ISO 2014 All rights reservedBS ISO 4437-2:2014ISO 4437-2:2014(E)4.2 Compound fo
40、r identification stripesFor pipes with identifications stripes, the compound used for these identification stripes shall be made from the same base polymer (PE) as one of the pipe compounds for which fusion compatibility has been proven.4.3 Recyclable materialRecyclable material including reprocessa
41、ble material obtained from external sources shall not be used.5 General characteristics5.1 AppearanceWhen viewed without magnification, the internal and external surfaces of pipes shall be smooth and clean and shall have no scoring, cavities, and other surface defects to an extent that would prevent
42、 conformity to this part of ISO 4437.The ends of the pipes shall be cut cleanly and square to the axis of the pipes.5.2 ColourPipes shall be black (PE 80 or PE 100), yellow (PE 80), or orange (PE 100). In addition, black PE 80 pipes can be identified by yellow stripes and black PE 100 pipes can be i
43、dentified by yellow or orange stripes, according to national preference.The outer co-extruded layer of co-extruded pipes (see Annex A) or the outer peelable layer of peelable-layer pipes (see Annex B) shall be either black, yellow, or orange. In addition, identification stripes can be used according
44、 to national preference.6 Geometrical characteristics6.1 Measurement of dimensionsThe dimensions of the pipes shall be measured in accordance with ISO 3126 and rounded to the next 0,1 mm. In case of dispute, the measurement shall not be made less than 24 h after manufacture and after being condition
45、ed for at least 4 h at (23 2) C.Indirect measurement at the stage of production is allowed at shorter time periods, provided that evidence is shown of correlation.6.2 Mean outside diameters, out-of-roundness (ovality), and tolerancesThe mean outside diameters of the pipes, dem, shall conform to Tabl
46、e 1.For straight pipes, the maximum out-of-roundness shall conform to Table 1. For coiled pipes, the maximum out-of-roundness shall be specified by an agreement between the manufacturer and the end-user. ISO 2014 All rights reserved 3BS ISO 4437-2:2014ISO 4437-2:2014(E)Table 1 Mean outside diameters
47、 and out-of-roundnessDimensions in millimetresNominal size DN/ODNominal outside diameter dnMean outside diameter Maximum out-of-roundness for straight pipesb cdem,mindem,maxa16 16 16,0 16,3 1,220 20 20,0 20,3 1,225 25 25,0 25,3 1,232 32 32,0 32,3 1,340 40 40,0 40,4 1,450 50 50,0 50,4 1,463 63 63,0 6
48、3,4 1,575 75 75,0 75,5 1,690 90 90,0 90,6 1,8110 110 110,0 110,7 2,2125 125 125,0 125,8 2,5140 140 140,0 140,9 2,8160 160 160,0 161,0 3,2180 180 180,0 181,1 3,6200 200 200,0 201,2 4,0225 225 225,0 226,4 4,5250 250 250,0 251,5 5,0280 280 280,0 281,7 9,8315 315 315,0 316,9 11,1355 355 355,0 357,2 12,5
49、400 400 400,0 402,4 14,0450 450 450,0 452,7 15,6500 500 500,0 503,0 17,5560 560 560,0 563,4 19,6630 630 630,0 633,8 22,1aGrade B according to ISO 11922-1:1997.bMeasurement of out-of-roundness shall be made at the point of manufacturing.cIf other values for the out-of-roundness than those given in Table 1 are necessary (e.g. coiled pipes), they shall be agreed between the manufacturer and the end-user.6.3 Wall thicknesses and related tolerances6.3.1
