1、 Reference number ISO 4427-1:2007(E) ISO 2007INTERNATIONAL STANDARD ISO 4427-1 First edition 2007-08-01 Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 1: General Systmes de canalisations en plastique Tubes et raccords en polythylne (PE) destins lalimentation en ea
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5、ariat 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 writin
6、g 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 ISO 2007 All rights reservedISO 4427-1:2
7、007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms, definitions, symbols and abbreviated terms. 3 3.1 Terms and definitions. 3 3.2 Symbols . 6 3.3 Abbreviated terms 6 4 Material 7 4.1 Compound . 7 4.2 Colour 7 4.3 Use of re
8、processable and recyclable material 7 4.4 Physical characteristics of the compound 7 4.5 Fusion compatibility. 9 4.6 Classification and designation 10 5 Effect on water quality of pipes intended for conveyance of water for human consumption . 10 Annex A (informative) Pressure reduction coefficients
9、. 11 Annex B (informative) Resistance to rapid crack propagation 12 Bibliography . 14 ISO 4427-1:2007(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
10、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 liaiso
11、n 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 tec
12、hnical 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 dra
13、wn 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 4427-1 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of f
14、luids, Subcommittee SC 2, Plastics pipes and fittings for water supplies. This first edition, together with ISO 4427-2, 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 Polyethy
15、lene (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 4427-1:2007(E) ISO 2007 All rights reserved v Introduction ISO 4427, the system standard, specifies the requirements for a piping system and its components when
16、 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 human
17、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 confo
18、rmity can be found in Bibliographical references 9 and 10. INTERNATIONAL STANDARD ISO 4427-1:2007(E) ISO 2007 All rights reserved 1 Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 1: General 1 Scope This part of ISO 4427 specifies the general aspects of polyethylen
19、e (PE) piping systems (mains and service pipes) 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
20、 4427, it is applicable to PE pipes, fittings, their joints 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 bar 1) ; b) an operating temperature of 20 C as the reference temp
21、erature. NOTE 1 For applications operating at constant temperatures greater than 20 C and up to 40 C, see 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
22、 appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes. 2 Normative references The following referenced documents are indispensable for the application of this document. For d
23、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3:1973, Preferred numbers Series of preferred numbers ISO 472, Plastics Vocabulary ISO 1043-1, Plastics Symbols and abbreviated terms Part 1:
24、 Basic polymers and their special characteristics ISO 1133:2005, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics 1) 1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm 2 . ISO 4427-1:2007(E) 2 ISO 2007 All rights reservedISO 1167-1, Thermoplastics
25、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 assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of p
26、ipe test pieces ISO 1183-2, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column method ISO 4065:1996, Thermoplastics pipes Universal wall thickness table ISO 4427-2:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply P
27、art 2: Pipes ISO 4427-3:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 3: Fittings ISO 4427-5:2007, Plastics piping systems Polyethylene (PE) pipes and fittings for water supply Part 5: Fitness for purpose of the system ISO 6259-1:1997, Thermoplastics pipes
28、Determination of tensile properties Part 1: General test method ISO 6259-3:1997, Thermoplastics pipes Determination of tensile properties Part 3: Polyolefin pipes ISO 6964:1986, Polyolefin pipes and fittings Determination of carbon black content by calcination and pyrolysis Test method and basic spe
29、cification ISO 9080, Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 11357-6:2002, Plastics Differential scanning calorimetry (DSC) Part 6: Determination of oxidation induction time ISO 11414, Plast
30、ics pipes and fittings Preparation of polyethylene (PE) pipe/pipe or pipe/fitting test piece assemblies by butt fusion ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications Classification and designation Overall service (design) coefficient ISO 13479:1997, Polyolefin p
31、ipes for the conveyance of fluids Determination of resistance to crack propagation Test method for slow crack growth on notched pipes (notch test) ISO 13761:1996, Plastics pipes and fittings Pressure reduction factors for polyethylene pipeline systems for use at temperatures above 20 C ISO 13953:200
32、1, 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 test for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm
33、ISO 16871, Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weathering ISO 18553, Method for the assessment of the degree of pigment or carbon black dispersion in polyolefin pipes, fittings and compounds EN 12099, Plastics piping systems Polyeth
34、ylene piping materials and components Determination of volatile content ISO 4427-1:2007(E) ISO 2007 All rights reserved 3 ISO 15512, Plastics Determination of water content Guidelines for drinking water quality, Volume 1: Recommendations, WHO, Geneva, 1984 EC Council Directive 98/83/EC of 3 November
35、 1998 on the quality of water intended for human consumption, Official Journal of the European Communities 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 3, ISO 472 and ISO 1043-1, and the follow
36、ing, apply. 3.1.1 Geometrical characteristics 3.1.1.1 nominal size DN numerical designation of the size of a component, other than a component designated by a thread size, which is a convenient round number approximately equal to the manufacturing dimension in millimetres (mm) 3.1.1.2 nominal size D
37、N/OD nominal size, related to the outside diameter 3.1.1.3 nominal outside diameter d nspecified outside diameter, in millimetres, assigned to a nominal size DN/OD 3.1.1.4 outside diameter at any point d evalue of the measurement of the outside diameter through its cross-section at any point of the
38、pipe rounded to the next greater 0,1 mm 3.1.1.5 mean outside diameter d emvalue of the measurement of the outer circumference of the pipe or spigot end of a fitting in any cross-section divided by ( = 3,142), rounded to the next greater 0,1 mm 3.1.1.6 minimum mean outside diameter d em min minimum v
39、alue of the outside diameter as specified for a given nominal size 3.1.1.7 maximum mean outside diameter d em max maximum value of the outside diameter as specified for a given nominal size ISO 4427-1:2007(E) 4 ISO 2007 All rights reserved3.1.1.8 out-of-roundness ovality difference between the measu
40、red maximum outside diameter and the measured minimum outside diameter in the same cross-section of the pipe or spigot end of a fitting 3.1.1.9 nominal wall thickness e nnumerical designation of the wall thickness of a component, which is a convenient round number approximately equal to the manufact
41、uring dimension in millimetres 3.1.1.10 wall thickness at any point e value of the measurement of the wall thickness at any point around the circumference of a component 3.1.1.11 minimum wall thickness at any point e minminimum value of the wall thickness at any point around the circumference of a c
42、omponent as specified 3.1.1.12 maximum wall thickness at any point e maxmaximum value of the wall thickness at any point around the circumference of a component as specified 3.1.1.13 mean wall thickness e marithmetic mean of a number of measurements regularly spaced around the circumference of the c
43、omponent in the same cross-section of the component, including the measured minimum and the measured maximum values of the wall thickness 3.1.1.14 pipe series S dimensionless number for pipe designation conforming to ISO 4065 NOTE The relationship between the pipe series, S, and the standard dimensi
44、on ratio, SDR, is given by the following equation from ISO 4065: SDR 1 S 2 = 3.1.1.15 standard dimension ratio SDR ratio of the nominal outside diameter, d n , of a pipe to its nominal wall thickness, e n3.1.1.16 tolerance permissible variation of the specified value of a quantity expressed as the d
45、ifference between the permissible maximum and permissible minimum values ISO 4427-1:2007(E) ISO 2007 All rights reserved 5 3.1.2 Related to service conditions 3.1.2.1 nominal pressure PN numerical designation used for reference purposes related to the mechanical characteristics of the component of a
46、 piping system NOTE For plastic piping systems conveying water, it corresponds to the maximum continuous operating pressure, expressed in bar, which can be sustained with water at 20 C, based on the minimum design coefficient. 3.1.2.2 maximum operating pressure MOP maximum effective pressure of the
47、fluid in the piping system, expressed in bar, which is allowed in continuous use It takes into account the physical and the mechanical characteristics of the components of a piping system NOTE It is calculated using the following equation: () () 20 MRS MOP SDR 1 C = 3.1.2.3 allowable operating press
48、ure PFA maximum hydrostatic pressure that a component is capable of withstanding continuously in service 3.1.3 Related to material characteristics 3.1.3.1 lower confidence limit of the predicted hydrostatic strength at 20 C for 50 years LPLquantity, with the dimensions of stress expressed in megapas
49、cals, which can be considered as a property of the material, and which represents the 97,5 % lower confidence limit of the predicted hydrostatic strength at 20 C for 50 years with internal water pressure 3.1.3.2 minimum required strength MRS value of LPLrounded down to the next smaller value of the R10 series or R20 series, depending on the value of LPLNOTE R10 and R20 series are the Renard number series accord
