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1、 Reference number ISO 4427-2:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 4427-2 First edition 2007-08-01 Plastics 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
2、 Partie 2: Tubes 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 and installed on the computer performing the
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5、t 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 microfilm, without permission in writing fr
6、om 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 ISO 2007 All rights reserved ISO 4427-2:2007
7、(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 2 3 Terms, definitions, 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
8、 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 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 cas
9、e of failure at 80 C. 12 8 Physical characteristics. 12 8.1 Conditioning 12 8.2 Requirements 12 9 Chemical characteristics of pipes in 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.
10、 15 Annex B (informative) Relationship between PN, MRS, S and SDR . 17 Bibliography. 18 ISO 4427-2:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepari
11、ng 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, in lia
12、ison 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 task of
13、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. Attention is
14、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 4427-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport o
15、f fluids, Subcommittee 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 Polye
16、thylene (PE) pipes and fittings for water supply: Part 1: General Part 2: Pipes Part 3: Fittings Part 5: Fitness for purpose of the system -,-,- ISO 4427-2:2007(E) ISO 2007 All rights reserved v Introduction ISO 4427, the system standard, specifies the requirements for a piping system and its compon
17、ents 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 for general purposes. In respect of potential adverse effects on the quality of water intended f
18、or 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 the use and/or the characteristics of these products are in force. NOTE Guidance for assessment
19、 of conformity can be found in Bibliographical references 5 and 6. -,-,- -,-,- INTERNATIONAL STANDARD ISO 4427-2:2007(E) ISO 2007 All rights reserved 1 Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 2: Pipes 1 Scope This part of ISO 4427 specifies the pipes made f
20、rom 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 parts of ISO 4427, it is applicable to
21、 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 of 20 C as the reference temperatu
22、re. 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 responsibility of the purchaser or specifier
23、 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), including any identification stripes; PE
24、 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 additional layer on the outside of the
25、pipe (“coated pipe”), see Annex A. 1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2. -,-,- ISO 4427-2:2007(E) 2 ISO 2007 All rights reserved 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appl
26、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1133:2005, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics ISO 1167-1, Thermoplastics pipes, fittings and assemblies for th
27、e conveyance of fluids Determination of the resistance to internal pressure Part 1: General method 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 pieces ISO 2505, Thermoplast
28、ics pipes Longitudinal reversion Test method and parameters ISO 3126, Plastics piping systems Plastics components Determination of dimensions ISO 4065, Thermoplastics pipes Universal wall thickness table ISO 4427-1:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply P
29、art 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 ISO 4433-1:1997, Thermoplastics pipes Resistance to liquid chemicals Classification Part 1: Immersion test method ISO 4433-2:1997, Thermoplastics pi
30、pes Resistance to liquid chemicals Classification Part 2: Polyolefin pipes ISO 6259-1:1997, Thermoplastics pipes Determination of tensile properties Part 1: General test method ISO 6259-3:1997, Thermoplastics pipes Determination of tensile properties Part 3: Polyolefin pipes ISO 11357-6:2002, Plasti
31、cs Differential scanning calorimetry (DSC) Part 6: Determination of oxidation induction time ISO 11922-1:1997, Thermoplastics pipes for the conveyance of fluids Dimensions and tolerances Part 1: Metric series 3 Terms, definitions, symbols and abbreviated terms For the purposes of this document, the
32、terms, definitions, symbols and abbreviated terms given in ISO 4427-1 apply. -,-,- ISO 4427-2:2007(E) ISO 2007 All rights reserved 3 4 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 u
33、sed for identification stripes and co-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
34、 Appearance When viewed without magnification, 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
35、 of the pipe. 5.2 Colour The pipes shall 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 component
36、s and components with non-black layers 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
37、 pipe shall be measured in accordance 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, an
38、d the out-of-roundness (ovality) shall be in accordance with Table 1. ISO 4427-2:2007(E) 4 ISO 2007 All rights reserved Table 1 Mean outside diameters and out-of-roundness Dimensions in millimetres Mean outside diameter a Nominal size DN/OD Nominal outside diameter dn dem min dem max Maximum out-of-
39、roundness (ovality) b 16 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 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 18
40、0 180 180,0 181,1 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
41、 710,0 716,4 800 800 800,0 807,2 900 900 900,0 908,1 1 000 1 000 1 000,0 1 009,0 1 200 1 200 1 200,0 1 210,8 c 1 400 1 400 1 400,0 1 412,6 c 1 600 1 600 1 600,0 1 614,4 c 1 800 1 800 1 800,0 1 816,2 c 2 000 2 000 2 000,0 2 018,0 c For coiled pipe and for straight lengths with diameters W 710, the ma
42、ximum out-of-roundness shall be agreed between manufacturer and purchaser. a In accordance with ISO 11922-1:1997, grade B, for sizes u 630 and grade A for sizes W 710. b In accordance with ISO 11922-1:1997, grade N, for sizes u 630, is measured at the point of manufacture. c Tolerance calculated as
43、0,009 dem and does not conform to grade A in ISO 11922-1:1997. ISO 4427-2:2007(E) ISO 2007 All rights reserved 5 NOTE Tolerance bands in accordance with ISO 11922-1 are calculated as follows, as applicable. a) Grade A: 0,009dn rounded to the next greater 0,1 mm with a minimum value of 0,3 mm and a m
44、aximum value of 10,0 mm. b) Grade B: 0,006dn rounded up to the next greater 0,1 mm with a minimum value of 0,3 mm and a maximum value of 4,0 mm. c) Grade N: for diameters u 75 mm (0,008 dn + 1) mm, for diameters W 90 mm and u 250 mm (0,02 dn) mm, for diameters 250 mm (0,035 dn) mm, rounded up to the
45、 next 0,1 mm. 6.3 Wall thicknesses and their tolerances The wall thickness shall be in accordance with Table 2. NOTE The relationship between PN, MRS, S and SDR is given in Annex B. -,-,- ISO 4427-2:2007(E) 6 ISO 2007 All rights reserved Table 2 Wall thicknesses Pipe series SDR 6 SDR 7,4 SDR 9 SDR 1
46、1 SDR 13,6 SDR 17 S 2,5 S 3,2 S 4 S 5 S 6,3 S 8 Nominal pressure (PN) a bar PE 40 PN 10 PN 8 PN 5 PN 4 PE 63 PN 10 PN 8 PE 80 PN 25 PN 20 PN 16 PN 12,5 PN 10 PN 8 PE 100 PN 25 PN 20 PN 16 PN 12,5 PN 10 Wall thicknesses b mm Nominal size emin emax emin emax emin emax emin emax emin emax emin emax 16
47、3,0 3,4 2,3 c 2,7 2,0 c 2,3 20 3,4 3,9 3,0 3,4 2,3 c 2,7 2,0 c 2,3 25 4,2 4,8 3,5 4,0 3,0 3,4 2,3 c 2,7 2,0 c 2,3 32 5,4 6,1 4,4 5,0 3,6 4,1 3,0 3,4 2,4 2,8 2,0 c 2,3 40 6,7 7,5 5,5 6,2 4,5 5,1 3,7 4,2 3,0 3,5 2,4 2,8 50 8,3 9,3 6,9 7,7 5,6 6,3 4,6 5,2 3,7 4,2 3,0 3,4 63 10,5 11,7 8,6 9,6 7,1 8,0 5,
48、8 6,5 4,7 5,3 3,8 4,3 75 12,5 13,9 10,3 11,5 8,4 9,4 6,8 7,6 5,6 6,3 4,5 5,1 90 15,0 16,7 12,3 13,7 10,1 11,3 8,2 9,2 6,7 7,5 5,4 6,1 110 18,3 20,3 15,1 16,8 12,3 13,7 10,0 11,1 8,1 9,1 6,6 7,4 125 20,8 23,0 17,1 19,0 14,0 15,6 11,4 12,7 9,2 10,3 7,4 8,3 140 23,3 25,8 19,2 21,3 15,7 17,4 12,7 14,1 10,3 11,5 8,3 9,3 160 26,6 29,4 21,9 24,2 17,9 19,8 14,6 16,2 11,8 13,1 9,5 10,6 180 29,9 33,0 24,6 27,2 20,1 22,3 16