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 978-0-626-20748-9 SANS 4427-2:2008Edition 1ISO 4427-2:2007Edition 1SOUTH AFRICAN NATIONAL STANDARD Plastics piping systems Polyethylene (PE) pipes a
4、nd fittings for water supply Part 2: Pipes This national standard is the identical implementation of ISO 4427-2:2007 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 00
5、01 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 4427-2:2008 Edition 1 ISO: 4427-2:2007 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA SC 5120.12K,
6、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 4427-2:2007(E)ISO 2007INTERNATIONAL STANDARD ISO442
7、7-2First edition2007-08-01Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 2: Pipes Systmes de canalisations en plastique Tubes et raccords en polythylne (PE) destins lalimentation en eau Partie 2: Tubes SANS 4427-2:2008This s tandard may only be used and printed by
8、 approved subscription and freemailing clients of the SABS .ISO 4427-2:2007(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 licensed to a
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11、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 photocopying and
12、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 Switzerland ii I
13、SO 2007 All rights reservedSANS 4427-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-2:2007(E) ISO 2007 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 2 3 Terms, definitions
14、, symbols and abbreviated terms. 2 4 Material 3 4.1 Compound . 3 4.2 Identification compound 3 5 General characteristics 3 5.1 Appearance . 3 5.2 Colour 3 5.3 Effect on water quality 3 6 Geometrical characteristics. 3 6.1 Measurements. 3 6.2 Mean outside diameter and out-of-roundness (ovality) 3 6.3
15、 Wall thicknesses and their tolerances 5 6.4 Coiled pipe. 10 6.5 Lengths 10 7 Mechanical characteristics 10 7.1 Conditioning 10 7.2 Requirements 10 7.3 Retest in case of failure at 80 C . 12 8 Physical characteristics. 12 8.1 Conditioning 12 8.2 Requirements 12 9 Chemical characteristics of pipes in
16、 contact with chemicals 14 10 Performance requirements 14 11 Marking 14 11.1 General. 14 11.2 Minimum required marking of pipes. 14 Annex A (normative) Layered pipes. 15 Annex B (informative) Relationship between PN, MRS, S and SDR . 17 Bibliography . 18 SANS 4427-2:2008This s tandard may only be us
17、ed and printed by approved subscription and freemailing clients of the SABS .ISO 4427-2:2007(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 preparing Internati
18、onal 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, in liaison with IS
19、O, 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 task of technical co
20、mmittees 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. Attention is drawn to the
21、 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 4427-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Su
22、bcommittee SC 2, Plastics pipes and fittings for water supplies. This first edition, together with ISO 4427-1, cancels and replaces ISO 4427:1996, of which it constitutes a technical revision. ISO 4427 consists of the following parts, under the general title Plastics piping systems Polyethylene (PE)
23、 pipes and fittings for water supply: Part 1: General Part 2: Pipes Part 3: Fittings Part 5: Fitness for purpose of the system SANS 4427-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-2:2007(E) ISO 2007 All rights reserved vIn
24、troduction 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
25、 water for 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 con
26、cerning the use and/or the characteristics of these products are in force. NOTE Guidance for assessment of conformity can be found in Bibliographical references 5 and 6. SANS 4427-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 442
27、7-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 4427-2:2007(E) ISO 2007 All rights reserved 1Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 2: Pipes 1 Scope This part of I
28、SO 4427 specifies the pipes made from polyethylene (PE) 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 refers. In conjunction with the other part
29、s of ISO 4427, it is applicable to PE pipes, their joints, to joints with components of PE and to mechanical joints with components 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
30、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 colours and additives. It is the responsibi
31、lity 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. Three types of pipe are specified: PE pipes (outside diameter dn), includ
32、ing any identification stripes; PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter dn), as specified in Annex A, where all layers have the same MRS rating. PE pipes (outside diameter dn) having a peelable, contiguous, thermoplastics addit
33、ional layer on the outside of the pipe (“coated pipe”), see Annex A. 1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. SANS 4427-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-2:2007(E) 2 ISO 2007 All rights reserved2 Normative ref
34、erences 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, Plastics Determination of
35、the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics 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 1167-2, Thermoplastics pipes, fittings and assemb
36、lies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test pieces ISO 2505, Thermoplastics pipes Longitudinal reversion Test method and parameters ISO 3126, Plastics piping systems Plastics components Determination of dimensions ISO 4065,
37、Thermoplastics pipes Universal wall thickness table ISO 4427-1:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 1: General ISO 4427-5:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 5: Fitness for purpose of the system
38、ISO 4433-1:1997, Thermoplastics pipes Resistance to liquid chemicals Classification Part 1: Immersion test method ISO 4433-2:1997, Thermoplastics pipes Resistance to liquid chemicals Classification Part 2: Polyolefin pipes ISO 6259-1:1997, Thermoplastics pipes Determination of tensile properties Par
39、t 1: General test method ISO 6259-3:1997, Thermoplastics pipes Determination of tensile properties Part 3: Polyolefin pipes ISO 11357-6:2002, Plastics Differential scanning calorimetry (DSC) Part 6: Determination of oxidation induction time ISO 11922-1:1997, Thermoplastics pipes for the conveyance o
40、f fluids Dimensions and tolerances Part 1: Metric series 3 Terms, definitions, symbols and abbreviated terms For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 4427-1 apply. SANS 4427-2:2008This s tandard may only be used and printed by approved sub
41、scription and freemailing clients of the SABS .ISO 4427-2:2007(E) ISO 2007 All rights reserved 34 Material 4.1 Compound The material from which the pipes are made shall be in accordance with ISO 4427-1. 4.2 Identification compound Where applicable, the compound used for identification stripes and co
42、-extruded layers (see 5.2) shall be manufactured from a PE polymer manufactured from the same type of base polymer as used in the compound for pipe production. For co-extruded layers used for identification purposes, Annex A applies. 5 General characteristics 5.1 Appearance When viewed without magni
43、fication, the internal and external surfaces of pipes shall be smooth, clean and free from scoring, cavities and other surface defects such as would prevent conformity of the pipe to this part of ISO 4427. The pipe ends shall be cut cleanly and square to the axis of the pipe. 5.2 Colour The pipes sh
44、all be either blue or black, or black with blue stripes. For coated pipes in accordance with Annex A, this applies to the coating. Blue pipes or black pipes with blue stripes are intended for drinking water only. For above-ground installations, all blue components and components with non-black layer
45、s should be protected from direct UV light. 5.3 Effect on water quality Attention is drawn to the requirements of national regulations (see also the Introduction). See ISO 4427-1:2007, Clause 5. 6 Geometrical characteristics 6.1 Measurements The dimensions of the pipe shall be measured in accordance
46、 with ISO 3126. In case of dispute, the measurements of dimensions shall be made not less than 24 h after manufacture and after conditioning for at least 4 h at (23 2) C. 6.2 Mean outside diameter and out-of-roundness (ovality) The mean outside diameters, dem, and the out-of-roundness (ovality) shal
47、l be in accordance with Table 1. SANS 4427-2:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4427-2:2007(E) 4 ISO 2007 All rights reservedTable 1 Mean outside diameters and out-of-roundness Dimensions in millimetres Mean outside diame
48、ter aNominal size DN/OD Nominal outside diameter dndem mindem maxMaximum out-of-roundness (ovality) b16 16 16,0 16,3 1,2 20 20 20,0 20,3 1,2 25 25 25,0 25,3 1,2 32 32 32,0 32,3 1,3 40 40 40,0 40,4 1,4 50 50 50,0 50,4 1,4 63 63 63,0 63,4 1,5 75 75 75,0 75,5 1,6 90 90 90,0 90,6 1,8 110 110 110,0 110,7
49、 2,2 125 125 125,0 125,8 2,5 140 140 140,0 140,9 2,8 160 160 160,0 161,0 3,2 180 180 180,0 181,1 3,6 200 200 200,0 201,2 4,0 225 225 225,0 226,4 4,5 250 250 250,0 251,5 5,0 280 280 280,0 281,7 9,8 315 315 315,0 316,9 11,1 355 355 355,0 357,2 12,5 400 400 400,0 402,4 14,0 450 450 450,0 452,7 15,6 500 500 500,0 503,0 17,5 560 560 560,0 563,4 19,6 630 630 630,0 633,8 22,1 710 710 710,0 716,4 800 800 800,0 807,2 900 900 900,0 908,1 1 000 1 000
