1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-20749-6 SANS 4427-3:2008Edition 1ISO 4427-3:2007Edition 1SOUTH AFRICAN NATIONAL STANDARD Plastics piping systems Polyethylene (PE) pipes a
4、nd fittings for water supply Part 3: Fittings This national standard is the identical implementation of ISO 4427-3:2007 and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria
5、 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 4427-3:2008 Edition 1 ISO: 4427-3:2007 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA SC 5120.12
6、K, Water and sanitation Equipment and systems Plastics pipes and fittings, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in July 2008. Reference numberISO 4427-3:2007(E)ISO 2007INTERNATIONAL STANDARD ISO
7、4427-3First 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 SANS 4427-3:2008This s tandard may only be used and p
8、rinted by approved subscription and freemailing clients of the SABS .ISO 4427-3:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are lice
9、nsed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of t
10、he software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating
11、to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All 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 photocop
12、ying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzer
13、land ii ISO 2007 All rights reservedSANS 4427-3:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-3:2007(E) ISO 2007 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 2 3 Terms, de
14、finitions, 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 Electrical characteristics for electrofusion fittings.5 5.5 Appearance of factory-made joints. 5 5.6 Effec
15、t 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 fusion fittings 8 6.5 Dimensions of fabricated fittings 8 6.6 Dimensions of electrofusion saddle fittings 10
16、 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 7.4 Retest in case of failure at 80 C . 13 7.5 Performance requirements 14 8 Physical characteristics.
17、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 marking 15 11.3 Fusion system recognition 16 12 Packaging 16 Annex A (normative) Socket fusion fittings 17 An
18、nex 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 E (normative) Tensile test for fitting/pipe assemblies 30 Bibliography . 31 SANS 4427-3:2008This s tan
19、dard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-3:2007(E) iv ISO 2007 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
20、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 organizations, governmental and non-governmental,
21、 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main t
22、ask 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 as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attent
23、ion 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 4427-3 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the tran
24、sport of fluids, Subcommittee SC 2, Plastics pipes 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 purp
25、ose of the system SANS 4427-3:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-3:2007(E) ISO 2007 All rights reserved vIntroduction ISO 4427, the system standard, specifies the requirements for a piping system and its components w
26、hen 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 for general purposes. In respect of potential adverse effects on the quality of water intended for hum
27、an 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 the use and/or the characteristics of these products are in force. NOTE Guidance for assessment of co
28、nformity can be found in Bibliographical references 8 and 9. SANS 4427-3:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 4427-3:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the S
29、ABS .INTERNATIONAL STANDARD ISO 4427-3:2007(E) ISO 2007 All rights reserved 1Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 3: Fittings 1 Scope This part of ISO 4427 specifies the general aspects of fittings made from polyethylene (PE) for piping systems intended
30、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 refers. In conjunction with the other parts of ISO 4427, it is applicable to PE fittings, their joints, to
31、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 including 25 bar1); b) an operating temperature of 20 C as the reference temperature. NOTE 1 For applications op
32、erating 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 colours and additives. It is the responsibility of the purchaser or specifier to make the appropriate selec
33、tions 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 of the following types: fusion fittings electrofusion fittings, butt fusion fittings and socket fusion fitti
34、ngs (see Annex A); fabricated fittings (see Annex B); mechanical fittings; flanged fittings. 1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. SANS 4427-3:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-3:2007(E) 2 ISO 2007 All rights
35、 reserved2 Normative references The following 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, Pl
36、astics Determination of the melt mass-flow 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
37、pipes, fittings and assemblies for the conveyance 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 fi
38、ttings for water supply Part 1: General ISO 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, Thermop
39、lastics pipes Resistance to liquid chemicals 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 ba
40、cking flanges ISO 11357-6, Plastics Differential 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
41、fusion ISO 13951, Plastics piping systems Test 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, Plas
42、tics pipes and fittings Peel decohesion test 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
43、 Polyethylene (PE) tapping tees Test method for impact resistance 2) Under revision. 3) To be published. (Revision of ISO 11357-6:2002) SANS 4427-3:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-3:2007(E) ISO 2007 All rights res
44、erved 3ISO 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 requirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber EN 681-2
45、: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 For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 4427
46、-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 electrical energy into heat to realize a fusion joint with a spigot end or pipe 3.2 electrofusion saddle
47、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 tee electrofusion saddle fitting (top-loading or wraparound) which contains an integral cutter used for cu
48、tting 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 requires an ancillary cutting tool for drilling the hole in the adjoining main pipe 3.3 spigot end fitting polye
49、thylene (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 where 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 o
