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 978-0-626-21575-0 SANS 22391-2:2008 Edition 1 ISO 22391-2:2007 Edition 1SOUTH AFRICAN NATIONAL STANDARD Plastics piping systems for hot and cold wat
4、er installations Polyethylene of raised temperature resistance (PE-RT) Part 2: Pipes This national standard is the identical implementation of ISO 22391-2:2007 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan
5、Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 22391-2: 2008 Edition 1 ISO 22391-2: 2007 Edition 1 Table of changes Change No. Da
6、te Scope National foreword This South African standard was approved by National Committee SABS SC 138H, Water and sanitation Equipment and systems Plastics pipes and fittings, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS
7、 document was published in December 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. Reference number ISO 22391-2:2007(E) ISO 2007INTERNATIONAL STANDARD ISO 22391-2 First edition 2007-01-15 Plastics piping systems for hot and cold water i
8、nstallations Polyethylene of raised temperature resistance (PE-RT) Part 2: Pipes Systmes de canalisations en plastique pour les installations deau chaude et froide Polythylne de meilleure rsistance la temprature (PE-RT) Partie 2: Tubes SANS 22391-2:2008This standard may only be used and printed by a
9、pproved subscription and freemailing clients of the SABS.ISO 22391-2:2007(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
10、 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 the software
11、 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 to it is fo
12、und, please inform the Central Secretariat at the address given below. 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 i
13、n 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 ISO 2007 All rights reservedSANS
14、 22391-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 22391-2:2007(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 term
15、s. 2 4 Material 2 4.1 Pipe material 2 4.2 Evaluation of LPLvalues 2 4.3 Influence on water intended for human consumption 4 5 General characteristics 4 5.1 Appearance . 4 5.2 Opacity. 4 6 Geometrical characteristics. 5 6.1 General. 5 6.2 Dimensions of pipe. 5 7 Mechanical characteristics 8 8 Physica
16、l and chemical characteristics. 9 9 System performance requirements 9 10 Marking 9 10.1 General requirements. 9 10.2 Minimum required marking 10 Annex A (informative) Derivation of S calc,max11 Bibliography . 13 SANS 22391-2:2008This standard may only be used and printed by approved subscription and
17、 freemailing clients of the SABS.ISO 22391-2:2007(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 International Standards is normally carried out thro
18、ugh 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. ISO collabor
19、ates 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 International Standa
20、rds. 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 elements of t
21、his document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 22391-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 2, Plastics pipes and fittin
22、gs for water supplies. ISO 22391 consists of the following parts, under the general title Plastics piping systems for hot and cold water installations Polyethylene of raised temperature resistance (PE-RT): Part 1: General Part 2: Pipes Part 3: Fittings Part 5: Fitness for purpose of the system SANS
23、22391-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 22391-2:2007(E) ISO 2007 All rights reserved v Introduction ISO 22391, the system standard, specifies the requirements for a piping system and its components when made from polyeth
24、ylene of raised temperature resistance (PE-RT). The piping system is intended to be used for hot and cold water installations. In respect of potential adverse effects on the quality of water intended for human consumption caused by the products covered by ISO 22391: a) no information is provided as
25、to whether the products may be used without restriction; b) existing national regulations concerning the use and/or characteristics of the products remain in force. This part of ISO 22391 specifies the characteristics of pipes. At the time of its publication, system standards for piping systems of o
26、ther plastics materials used for the same application are ISO 15874:2003, Plastics piping systems for hot and cold water installations Polypropylene (PP), ISO 15875:2003, Plastics piping systems for hot and cold water installations Crosslinked polyethylene (PE-X), ISO 15876:2003, Plastics piping sys
27、tems for hot and cold water installations Polybutylene (PB), and ISO 15877:2003, Plastics piping systems for hot and cold water installations Chlorinated poly(vinyl chloride) (PVC-C). SANS 22391-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the
28、SABS.SANS 22391-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.INTERNATIONAL STANDARD ISO 22391-2:2007(E) ISO 2007 All rights reserved 1 Plastics piping systems for hot and cold water installations Polyethylene of raised temperature resi
29、stance (PE-RT) Part 2: Pipes 1 Scope This part of ISO 22391 specifies the characteristics of pipe made from polyethylene of raised temperature resistance (PE-RT), intended to be used for hot and cold water installations within buildings for the conveyance of water whether or not the water is intende
30、d for human consumption (domestic systems) or heating systems under the design pressures and temperatures appropriate to the class of application according to ISO 22391-1. It covers a range of service conditions (classes of application), design pressures and pipe dimension classes, and also specifie
31、s test parameters and test methods. When used in conjunction with the other parts of ISO 22391, it is respectively applicable to PE-RT pipes, fittings, their joints, and to joints having components of PE-RT as well as of other plastics and non-plastics materials, used for hot and cold water installa
32、tions. It is applicable to pipes with or without a barrier layer or layers. It is not applicable for values of design temperature, maximum design temperature or malfunction temperature in excess of those specified in ISO 22391-1. NOTE It is the responsibility of the purchaser or specifier to make th
33、e appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refere
34、nces, 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 rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics ISO 1167-1:2006, Thermoplastics
35、 pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method ISO 1167-2:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparatio
36、n of pipe test pieces ISO 2505:2005, Thermoplastics pipes Longitudinal reversion Test method and parameters ISO 3126:2005, Plastics piping systems Plastics components Determination of dimensions ISO 7686:2005, Plastics pipes and fittings Determination of opacity SANS 22391-2:2008This standard may on
37、ly be used and printed by approved subscription and freemailing clients of the SABS.ISO 22391-2:2007(E) 2 ISO 2007 All rights reservedISO 9080, Plastics piping and ducting systems Determination of long-term hydrostatic strength of thermoplastic materials in pipe form by extrapolation ISO 13760, Plas
38、tics pipes for the conveyance of fluids under pressure Miners rule Calculation method for cumulative damage ISO 22391-1:2006, Plastics piping systems for hot and cold water installations Polyethylene of raised temperature resistance (PE-RT) Part 1: General ISO 22391-3, Plastics piping systems for ho
39、t and cold water installations Polyethylene of raised temperature resistance (PE-RT) Part 3: Fittings ISO 22391-5, Plastics piping systems for hot and cold water installations Polyethylene of raised temperature resistance (PE-RT) Part 5: Fitness for purpose of the system 3 Terms, definitions, symbol
40、s and abbreviated terms For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 22391-1 apply. 4 Material 4.1 Pipe material The material of which the pipe is made shall be polyethylene of raised temperature resistance (PE-RT). 4.2 Evaluation of LPLvalues
41、 The pipe material shall be evaluated in accordance with ISO 9080 or equivalent, with internal pressure tests being carried out in accordance with ISO 1167-1 and ISO 1167-2, in order to determine the LPLvalues. The LPLvalue thus determined shall be at least as high as the corresponding values of the
42、 reference curves given in Figure 1 (taken from ISO 24033) over the complete range of times. SANS 22391-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 22391-2:2007(E) ISO 2007 All rights reserved 3Key X1 time, t, to fracture, h X2 ye
43、ars Y hoop stress, , MPa Figure 1 Expected strength of PE-RT pipes SANS 22391-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 22391-2:2007(E) 4 ISO 2007 All rights reservedNOTE 1 One equivalent way of evaluation is to calculate the LP
44、Lvalue for each temperature (for example 20 C, 60 C and 95 C), individually. NOTE 2 The reference curves in Figure 1 in the temperature range of 10 C to 95 C are derived from Equations (1) and (2). First branch (i.e. the left-hand portion of the lines shown in Figure 1): 58219,035 log 78763,07 log19
45、0,481 119,877log t T T = + + (1) Second branch (i.e. the right-hand portion of the lines shown in Figure 1): 11150,56 1723,318 log log 23,7954 + t TT = (2) In order to demonstrate conformance to the reference lines, pipe samples should be tested in accordance with ISO 1167-1 and ISO 1167-2 at the fo
46、llowing temperatures and at various hoop stresses such that, at each of the temperatures, at least three failure times fall in each of the following time intervals. Temperatures: 20 C; 60 C to 70 C; 95 C. Time intervals: 10 h to 100 h; 100 h to 1 000 h; 1 000 h to 8 760 h and over. In tests lasting
47、more than 8 760 h without failure, any test time after 8 760 h can be considered as the failure time. Conformance to the reference lines should be demonstrated by plotting the individual experimental results on the graph. At least 97,5 % of them should lie on or above the reference line. 4.3 Influen
48、ce on water intended for human consumption The material shall be in accordance with ISO 22391-1. 5 General characteristics 5.1 Appearance When viewed without magnification, the internal and external surfaces of pipes shall be smooth, clean and free from an extent of scoring, cavities and other surfa
49、ce defects that would prevent conformance with this part of ISO 22391. The material shall not contain visible impurities. Slight variations in the appearance of the colour shall be permitted. The ends of the pipe shall be cut cleanly and square to the axis of the pipe. 5.2 Opacity PE-RT pipes that are declared to be opaque shall not transmit more than 0,2 % of visible light when tested in accordance with ISO 7686. SANS 22
