1、BSI Standards PublicationBS ISO 4437-3:2014Plastics piping systems forthe supply of gaseous fuels Polyethylene (PE)Part 3: FittingsBS ISO 4437-3:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 4437-3:2014.T o g e t h e r w i t h B S I S O 4 4 3 7 - 1 : 201
2、4, BS ISO 4437-2:2014 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4437-5:2014, it supersedes BS ISO 4437:2007, BS ISO 8085-1:2001, BS ISO 8085-2:2001 and BS ISO 8085-3:2001, which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/88/2, Plastics piping for pressure applications.A list of
3、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 2014.Published by BSI Standards Limite
4、d 2014ISBN 978 0 580 77408 9ICS 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 publicationDa
5、te T e x t a f f e c t e dBS ISO 4437-3:2014 ISO 2014Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: FittingsSystmes de canalisations en matires plastiques pour la distribution de combustibles gazeux Polythylne (PE) Partie 3: RaccordsINTERNATIONAL STANDARDISO4437-3F
6、irst edition2014-01-15Reference numberISO 4437-3:2014(E)BS ISO 4437-3:2014ISO 4437-3:2014(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 m
7、eans, electronic or mechanical, 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 officeCase postale 56 CH-1211 Geneva
8、 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 4437-3:2014ISO 4437-3:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions, symbols, and abbreviation
9、s . 34 Materials . 44.1 PE compound . 44.2 Material for non-polyethylene parts 45 General characteristics 55.1 Appearance 55.2 Colour 55.3 Design . 55.4 Appearance of factory made joints 55.5 Electrical characteristics for electrofusion fittings 56 Geometrical characteristics 66.1 Measurement of dim
10、ensions . 66.2 Dimensions of electrofusion socket fittings . 66.3 Dimensions of electrofusion saddle fittings 86.4 Dimensions of spigot end fittings . 96.5 Dimensions of socket fusion fittings . 126.6 Dimensions of mechanical fittings 127 Mechanical characteristics .127.1 General 127.2 Requirements
11、137.3 Performance requirements . 137.4 Modifications of the fitting 138 Physical characteristics 168.1 Conditioning . 168.2 Requirements 169 Performance requirements 1710 Technical file 1711 Marking .1811.1 General 1811.2 Minimum required marking of fittings . 1811.3 Additional marking 1911.4 Fusion
12、 system recognition . 1912 Delivery conditions .19Annex A (normative) Socket fusion fittings .20Annex B (informative) Examples of typical terminal connection for electrofusion fittings 22Annex C (normative) Short-term pressure test method .25Annex D (normative) Tensile test for fitting/pipe assembli
13、es .27Annex E (informative) Formulae for calculating the equivalent dimensions of non-metric electrofusion socket fitting series .29Bibliography .31BS ISO 4437-3:2014ISO 4437-3:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bod
14、ies (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 that committee. International organization
15、s, 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 document and those intended for its further
16、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 Directives, Part 2 (see www.iso.org/directives).
17、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 development of the document will be in the Introdu
18、ction 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 specific terms and expressions related to conf
19、ormity 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 138, Plastics pipes, fittings and valves for the transport of
20、 fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.This first edition of ISO 4437-3 together with the first editions of ISO 4437-1, ISO 4437-2 and ISO 4437-5 cancel and replace ISO 4437:2007, ISO 8085-1:2001, ISO 8085-2:2001 and ISO 8085-3:2001, of which they con
21、stitute 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: Fittings Part 4: Valves Part 5: Fitness for purpose of the systemiv ISO 2014 All rights res
22、ervedBS ISO 4437-3:2014ISO 4437-3:2014(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 the supply of gaseous fuels.Requirements and test methods for material and components, other
23、than fittings, are specified in ISO 4437-1, ISO 4437-2, 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 10839.1This part of ISO 4437 covers the characteristics of fittings. ISO 2014 All rights res
24、erved vBS ISO 4437-3:2014BS ISO 4437-3:2014Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings1 ScopeThis part of ISO 4437 specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the f
25、ield of the supply of gaseous fuels.It also specifies the test parameters for the test methods referred to in this part of ISO 4437.In conjunction with ISO 4437-1, ISO 4437-2, ISO 4437-4, and ISO 4437-5, it is applicable to PE pipes, fittings and valves, their joints, and joints with components of P
26、E 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 account rapid crack propagation (RCP) requirements;b)
27、a temperature of 20 C as reference temperature for the design basis.NOTE 1 For other operating temperatures, derating coefficients are given in ISO 4437-5:2014.NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account the
28、ir particular requirements and any relevant national regulations and installation practices or codes.This part of ISO 4437 is applicable for fittings of the following types: electrofusion socket fittings; electrofusion saddle fittings; spigot end fittings (for butt fusion using heated tools and elec
29、trofusion socket fusion); socket fusion fittings; mechanical fittings.The fittings can for example be in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends, or end caps.NOTE 3 Fabricated fittings are normally not used for gas applications except for larger dimensions or i
30、n the absence of other solutions. Guidance can be found in ISO 4427-3:2007, Annex B.22 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 un
31、dated references, the latest edition of the referenced document (including any amendments) applies.ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designationINTERNATIONAL STANDARD ISO 4437-3:2014(E) ISO 2014 All rights reserved 1BS ISO 44
32、37-3:2014ISO 4437-3:2014(E)ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designationISO 1133-1, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics Part 1: Standard methodIS
33、O 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General methodISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pres
34、sure Part 4: Preparation of assembliesISO 3126, Plastics piping systems Plastics components Determination of dimensionsISO 4437-1:2014, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 1: GeneralISO 4437-2:2014, Plastics piping systems for the supply of gaseous fuels Po
35、lyethylene (PE) Part 2: PipesISO 4437-5:2014, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 5: Fitness for purpose of the systemISO 10838-1 1), Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels Part 1: Metal fittings for pipes of nom
36、inal outside diameter less than or equal to 63 mmISO 10838-2 1), Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels Part 2: Metal fittings for pipes of nominal outside diameter greater than 63 mmISO 10838-3 1), Mechanical fittings for polyethylene piping systems for
37、the supply of gaseous fuels Part 3: Thermoplastics fittings for pipes of nominal outside diameter less than or equal to 63 mmISO 11357-6, Plastics Differential scanning calorimetry (DSC) Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic O
38、IT)ISO 12176-4, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 4: Traceability codingISO 13950, Plastics pipes and fittings Automatic recognition systems for electrofusion jointsISO 13951, Plastics piping systems Test method for the resistance of polyolefin pipe/
39、pipe or pipe/fitting assemblies to tensile loadingISO 13953, Polyethylene (PE) pipes and fittings Determination of the tensile strength and failure mode of test pieces from a butt-fused jointISO 13954, Plastics pipes and fittings Peel decohesion test for polyethylene (PE) electrofusion assemblies of
40、 nominal outside diameter greater than or equal to 90 mmISO 13955, Plastics pipes and fittings Crushing decohesion test for polyethylene (PE) electrofusion assembliesISO 13956, Plastics pipes and fittings Decohesion test of polyethylene (PE) saddle fusion joints Evaluation of ductility of fusion joi
41、nt interface by tear testISO 13957, Plastics pipes and fittings Polyethylene (PE) tapping tees Test method for impact resistanceISO 16010, Elastomeric seals Material requirements for seals used in pipes and fittings carrying gaseous fuels and hydrocarbon fluidsISO 21751, Plastics pipes and fittings
42、Decohesion test of electrofusion assemblies Strip-bend test1) These International Standards are under revision and will be replaced by ISO 17885.2 ISO 2014 All rights reservedBS ISO 4437-3:2014ISO 4437-3:2014(E)EN 12117, Plastics piping systems Fittings, valves and ancillaries Determination of gaseo
43、us flow rate/pressure drop relationships3 Terms and definitions, symbols, and abbreviationsFor the purposes of this document, the terms and definitions, symbols, and abbreviations given in ISO 4437-1:2014 and the following apply.3.1electrofusion socket fittingpolyethylene (PE) fitting which contains
44、 one or more integral heating elements that are capable of transforming electrical energy into heat to realize a fusion joint with a spigot end or a pipe3.2electrofusion saddle fittingpolyethylene (PE) fitting which contains one or more integral heating elements that are capable of transforming elec
45、trical energy into heat to realize a fusion joint onto a pipe3.2.1electrofusion tapping teeelectrofusion saddle fitting (top loading or wrap round) which contains an integral cutter to cut through the wall of the main pipe, which remains in the body of the tapping tee after installation3.2.2electrof
46、usion branch saddleelectrofusion saddle fitting (top loading or wrap round) which requires an ancillary cutting tool for drilling a hole in the adjoining main pipe3.3spigot end fittingpolyethylene (PE) fitting where the outside diameter of the spigot end is equal to the nominal outside diameter, dn,
47、 of the corresponding pipe3.4socket fusion fittingpolyethylene (PE) fitting heated by a purpose-made heating tool to realize a fusion joint with a spigot end or a pipe3.5mechanical fittingfitting that generally includes a compression part to provide pressure integrity, leak tightness, and resistance
48、 to end loads for assembling polyethylene (PE) pipe to another PE pipe or any other element of the piping systemNote 1 to entry: A pipe-supporting sleeve providing a permanent support for a polyethylene (PE) pipe to prevent creep in the pipe wall under radial compressive forces is applicable. The me
49、tallic parts of the fitting can be assembled to metallic pipes by screw-threads, compression joints, and welded or flanged connections, including PE flanges. In some cases, the supporting sleeve at the same time constitutes a grip ring.Note 2 to entry: The fitting can allow either a dismountable or permanently assembled joint.Note 3 to entry: The mechanical fitting can be supplied for field assembly or pre-assembled by the manufacturer.3.6voltage regulationcontr
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