1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58for water supply Part 3: FittingsICS 23.040.20; 23.040.45; 91.140.60; 93.025Plastics piping systems
2、 Polyethylene (PE) pipes and fittings BRITISH STANDARDBS ISO 4427-3:2007BS ISO 4427-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 September 2007 BSI 2007ISBN 978 0 580 55176 5Amendments issued since publicationAmd. No. Date Comment
3、scontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard is the UK implementation of ISO 4427-3:2007.The UK participation in its preparation was entrusted by Technical Committ
4、ee PRI/88, Plastics piping systems, to Subcommittee PRI/88/2, Plastics piping for pressure applications.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 Reference numberISO
5、 4427-3:2007(E)INTERNATIONAL STANDARD ISO4427-3First edition2007-08-01Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 3: Fittings Systmes de canalisations en plastique Tubes et raccords en polythylne (PE) destins lalimentation en eau Partie 3: Raccords BS ISO 4427-
6、3:2007ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 2 3 Terms, definitions, symbols and abbreviated terms. 3 4 Material 4 4.1 PE compound 4 4.2 Material for non-polyethylene parts 4 5 General characteristics 5 5.1 Appearance . 5 5.2 Design 5 5.3 Colour 5 5.4 Ele
7、ctrical characteristics for electrofusion fittings.5 5.5 Appearance of factory-made joints. 5 5.6 Effect on water quality 5 6 Geometrical characteristics. 6 6.1 Measurement of dimensions . 6 6.2 Dimensions of electrofusion sockets. 6 6.3 Dimensions of spigot fittings 8 6.4 Dimensions of socket fusio
8、n fittings 8 6.5 Dimensions of fabricated fittings 8 6.6 Dimensions of electrofusion saddle fittings 10 6.7 Dimensions of mechanical fittings . 11 6.8 Dimensions of loose backing flanges and flange adapters . 11 7 Mechanical characteristics 11 7.1 General. 11 7.2 Conditioning 11 7.3 Requirements 12
9、7.4 Retest in case of failure at 80 C . 13 7.5 Performance requirements 14 8 Physical characteristics. 14 8.1 Conditioning 14 8.2 Requirements 14 9 Chemical resistance of fittings in contact with chemicals. 15 10 Performance requirements 15 11 Marking 15 11.1 General. 15 11.2 Minimum required markin
10、g 15 11.3 Fusion system recognition 16 12 Packaging 16 Annex A (normative) Socket fusion fittings 17 Annex B (normative) Fabricated fittings 19 Annex C (informative) Examples of typical terminal connections for electrofusion fittings . 26 Annex D (normative) Short-term pressure test method. 28 Annex
11、 E (normative) Tensile test for fitting/pipe assemblies 30 Bibliography . 31 BS ISO 4427-3:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally ca
12、rried 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 organizations, governmental and non-governmental, in liaison with ISO, also take part in the work
13、. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International 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 Intern
14、ational Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as 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
15、 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 4427-3 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 2, Plastics pip
16、es and fittings for water supplies. ISO 4427 consists of the following parts, under the general title Plastics piping systems Polyethylene (PE) pipes and fittings for water supply: Part 1: General Part 2: Pipes Part 3: Fittings Part 5: Fitness for purpose of the system BS ISO 4427-3:2007vIntroductio
17、n ISO 4427, the system standard, specifies the requirements for a piping system and its components when made from polyethylene (PE). The piping system is intended to be used for water supply intended for human consumption, including the conveyance of raw water prior to treatment and that of water fo
18、r general purposes. In respect of potential adverse effects on the quality of water intended for human consumption caused by the products covered by ISO 4427: a) ISO 4427 provides no information as to whether the products may be used without restriction; b) existing national regulations concerning t
19、he use and/or the characteristics of these products are in force. NOTE Guidance for assessment of conformity can be found in Bibliographical references 8 and 9. BS ISO 4427-3:2007blank1Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 3: Fittings 1 Scope This part of
20、 ISO 4427 specifies the general aspects of fittings made from polyethylene (PE) for piping systems intended for the conveyance of water for human consumption, including raw water prior to treatment and water for general purposes. It also specifies the test parameters for the test methods to which it
21、 refers. In conjunction with the other parts of ISO 4427, it is applicable to PE fittings, their joints, to joints with components of PE and to joints with mechanical fittings of other materials, intended to be used under the following conditions: a) a maximum operating pressure (MOP) up to and incl
22、uding 25 bar1); b) an operating temperature of 20 C as the reference temperature. NOTE 1 For applications operating at constant temperatures greater than 20 C and up to 40 C, see ISO 4427-1:2007, Annex A. NOTE 2 ISO 4427 covers a range of maximum operating pressures and gives requirements concerning
23、 colours and additives. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes. It is applicable to fittings
24、of the following types: fusion fittings electrofusion fittings, butt fusion fittings and socket fusion fittings (see Annex A); fabricated fittings (see Annex B); mechanical fittings; flanged fittings. 1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. BS ISO 4427-3:20072 2 Normative references The followi
25、ng referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1133:2005, Plastics Determination of the melt mass-flow
26、rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics 2)ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method ISO 1167-3, Thermoplastics pipes, fittings and assemblies for the conv
27、eyance of fluids Determination of the resistance to internal pressure Part 3: Preparation of components ISO 3126, Plastics piping systems Plastics components Determination of dimensions ISO 4427-1:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 1: General ISO
28、 4427-2:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 2: Pipes ISO 4427-5, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 5: Fitness for purpose of the system ISO 4433-1, Thermoplastics pipes Resistance to liquid chemical
29、s Classification Part 1: Immersion test method ISO 4433-2, Thermoplastics pipes Resistance to liquid chemicals Classification Part 2: Polyolefin pipes ISO 9624, Thermoplastics pipes for fluids under pressure Mating dimensions of flange adapters and loose backing flanges ISO 11357-6, Plastics Differe
30、ntial scanning calorimetry (DSC) Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) 3)ISO 12176-1, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 1: Butt fusion ISO 13951, Plastics piping systems T
31、est method for the resistance of polyolefin pipe/pipe or pipe/fitting assemblies to tensile loading ISO 13953, Polyethylene (PE) pipes and fittings Determination of the tensile strength and failure mode of test pieces from a butt-fused joint ISO 13954, Plastics pipes and fittings Peel decohesion tes
32、t for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm ISO 13955, Plastics pipes and fittings Crushing decohesion test for polyethylene (PE) electrofusion assemblies ISO 13957, Plastics pipes and fittings Polyethylene (PE) tapping tees Test method
33、 for impact resistance 2) Under revision. 3) To be published. (Revision of ISO 11357-6:2002) BS ISO 4427-3:20073ISO 14236, Plastics pipes and fittings Mechanical-joint compression fittings for use with polyethylene pressure pipes in water supply systems EN 681-1:1996, Elastomeric seals Materials req
34、uirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber EN 681-2:2000, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 2: Thermoplastic elastomers 3 Terms, definitions, symbols and abbreviated terms F
35、or the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 4427-1 and the following terms and definitions apply. 3.1 electrofusion socket fitting polyethylene (PE) fitting which contains one or more integral heating elements that are capable of transforming
36、electrical energy into heat to realize a fusion joint with a spigot end or pipe 3.2 electrofusion saddle fitting polyethylene (PE) fitting which contains one or more integral heating elements that are capable of transforming electrical energy into heat to produce a fusion onto a pipe 3.2.1 tapping t
37、ee electrofusion saddle fitting (top-loading or wraparound) which contains an integral cutter used for cutting through the wall of the main pipe, which remains in the body of the tapping tee after installation 3.2.2 branch saddle electrofusion saddle fitting (top-loading or wraparound) which require
38、s an ancillary cutting tool for drilling the hole in the adjoining main pipe 3.3 spigot end fitting polyethylene (PE) fitting where the outside diameter of the spigot length is equal to the nominal outside diameter, dn, of the corresponding pipe 3.4 socket fusion fitting polyethylene (PE) fitting wh
39、ere the socket mouth is designed to be fusion-jointed with a spigot end or a pipe using heated tools 3.5 fabricated fitting fitting produced from pipe conforming to ISO 4427-2 and/or from injection-moulded fittings in accordance with this part of ISO 4427 3.6 mechanical fitting fitting used for asse
40、mbling a polyethylene (PE) pipe to another PE pipe or any other element of the piping system NOTE 1 The mechanical fitting can be supplied for field assembly or pre-assembled by the manufacturer and generally includes a compression part to provide pressure integrity, leaktightness and resistance to
41、end loads. A support sleeve inserted into the pipe bore provides a permanent support for the PE pipe to prevent creep in the pipe wall under radial compressive forces. BS ISO 4427-3:20074 NOTE 2 The metallic parts of the fitting can be assembled to metallic pipes by using screw threads, compression
42、joints, welded or flanged connections including PE flanges. The fitting can allow either a dismountable or permanently assembled joint. In some cases, the supporting ring can also act as a grip ring. 3.7 voltage regulation control of energy supplied during the fusion process of an electrofusion fitt
43、ing by means of the voltage parameter 3.8 intensity regulation control of energy supplied during the fusion process of an electrofusion fitting by means of the current parameter 4 Material 4.1 PE compound The PE compound from which the fittings are made shall be in accordance with ISO 4427-1. 4.2 Ma
44、terial for non-polyethylene parts 4.2.1 General The materials and constituent elements used in making the fitting (including elastomers, greases and any metal parts) shall be as resistant to the external and internal environments as the other elements of the piping system and shall have a life expec
45、tancy under the following conditions at least equal to that of the PE pipe conforming to ISO 4427-2 with which they are intended to be used: a) during storage; b) under the effect of the fluids being conveyed; c) taking account of the service environment and operating conditions. The requirements fo
46、r the level of material performance for non-polyethylene parts shall be at least as stringent as that of the PE compound for the piping system. Other materials used in fittings and in contact with the PE pipe shall not adversely affect the pipe performance or initiate stress cracking. 4.2.2 Metal pa
47、rts All parts susceptible to corrosion shall be adequately protected. When dissimilar metallic materials are used which may be in contact with moisture, steps shall be taken to avoid galvanic corrosion. 4.2.3 Elastomers Elastomeric materials used for the manufacture of seals shall conform to EN 681-
48、1 or EN 681-2, as applicable. 4.2.4 Other materials Greases or lubricants shall not exude on to the fusion areas and shall not affect the long-term performance of the fitting nor have any adverse effect on the quality of the water. BS ISO 4427-3:200755 General characteristics 5.1 Appearance When vie
49、wed without magnification, the internal and external surfaces of the fitting shall be smooth, clean and free from scoring, cavities and other surface defects such as would prevent conformity of the fitting to this part of ISO 4427. 5.2 Design The design of the fitting shall be such that, when assembling the fitting onto the pipe or other components in accordance with the manufacturers recommendations, the electrical coils and/or seals are
