SANS 10508-2008 Plastics piping systems for hot and cold water installations - Guidance for classification and design《冷热水装置塑料管道系统 分类及设计指南》.pdf

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 978-0-626-21938-3 SANS 10508:2008Edition 2ISO 10508:2006Edition 2SOUTH AFRICAN NATIONAL STANDARD Plastics piping systems for hot and cold water inst

4、allations Guidance for classification and design This national standard is the identical implementation of ISO 10508:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Preto

5、ria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 10508:2008 Edition 2 ISO 10508:2006 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 134H, Water and sanitation Equipment and systems Pl

6、astics pipes and fittings, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in September 2008. This SANS document supersedes SABS ISO 10508:1995 (edition 1). Reference numberISO 10508:2006(E)ISO 2006INTERNA

7、TIONAL STANDARD ISO10508Second edition2006-03-15Plastics piping systems for hot and cold water installations Guidance for classification and design Systmes de canalisations en plastique destins aux installations deau chaude et froide Lignes directrices pour la classification et la conception SANS 10

8、508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 10508:2006(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 unle

9、ss the typefaces which are embedded are licensed 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

10、 of Adobe Systems Incorporated. Details of the 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

11、 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 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, inc

12、luding photocopying 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 Publi

13、shed in Switzerland ii ISO 2006 All rights reservedSANS 10508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 10508:2006(E) ISO 2006 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references .

14、1 3 Terms and definitions. 2 4 Classification of service conditions . 2 5 Design 4 5.1 Classification. 4 5.2 Dimensions 4 Annex A (informative) Derivation of temperature-time profiles 5 Annex B (informative) Product standards for plastics piping systems for hot and cold water installations 7 Bibliog

15、raphy . 9 SANS 10508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 10508:2006(E) iv ISO 2006 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

16、 (ISO member bodies). The work of 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,

17、governmental and non-governmental, 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/

18、IEC Directives, Part 2. The main task 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 me

19、mber bodies casting a vote. Attention 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 10508 was prepared by Technical Committee ISO/TC 138, Plastics pipes,

20、 fittings and valves for the transport of fluids, Subcommittee SC 2, Plastics pipes and fittings for water supplies. This second edition cancels and replaces the first edition (ISO 10508:1995), which has been technically revised. In particular, Clauses 6 to 10 have been deleted, and all product test

21、ing and fitness-for-purpose requirements have been referenced to the relevant product or system standards. SANS 10508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 10508:2006(E) ISO 2006 All rights reserved vIntroduction This Intern

22、ational Standard gives guidance for the classification and design of plastics piping systems for hot and cold water installations Performance requirements are specified in the relevant product or systems standards. A list of current product or systems standards is given in Annex B. SANS 10508:2008Th

23、is s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 10508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 10508:2006(E) ISO 2006 All rights reserved 1Plas

24、tics piping systems for hot and cold water installations Guidance for classification and design 1 Scope This International Standard gives guidance for the classification and design of hot and cold water pressure systems which use plastics pipes and plastics or metal fittings. It establishes a classi

25、fication system for common service conditions for pressurized hot and cold water systems. It gives a basis for evaluation and design of thermoplastics pipes and fittings in relation to the system performance requirements. It applies to plastics piping systems used to carry water a) in distribution s

26、ystems of hot and cold water, including potable water, and b) in transportation systems of hot water for heating, under design pressures up to at least 10 bar 1)at 20 C and up to 10 bar at temperatures according to the class of application (see Table 1). For values of TD, Tmaxand Tmalin excess of th

27、ose in Table 1, this International Standard is not applicable. Acceptance of any pipe(s) and/or fitting(s) made from a specific grade of material is subject to the relevant product or systems standard and the requirements detailed there. 2 Normative references The following referenced documents are

28、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 7686, Plastics pipes and fittings Determination of opacity ISO 9080, Plastics piping

29、 and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications Classification and designation Overall service (design) coefficient ISO 13760, Plast

30、ics pipes for the conveyance of fluids under pressure Miners rule Calculation method for cumulative damage 1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2. SANS 10508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 10508:2006(E) 2 ISO 20

31、06 All rights reserved3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 design temperature TDtemperature or a combination of temperatures of the conveyed water related to the circumstances for which the system has been designed 3.2 maximum desi

32、gn temperature Tmaxhighest design temperature, TD, occurring for short periods only 3.3 malfunction temperature Tmalhighest temperature that can be reached when the control limits are exceeded NOTE This can occur up to a total of 100 h over a period of 50 years. 3.4 cold water temperature Tcoldtempe

33、rature of conveyed cold water of up to approximately 25 C NOTE For design purposes, 20 C is used. 3.5 design pressure pDhighest pressure related to the circumstances for which the system has been designed 3.6 treated water for heating installations water intended for heating installations which cont

34、ains additives which have no detrimental effect on the system 4 Classification of service conditions The performance requirements are formulated for five different classes and are shown in Table 1. Each class relates to a field of application and for a design period of 50 years. The derivation of th

35、e temperature-time profiles is given in Annex A. These applications are given as guidance and are not requirements. In countries with extreme weather conditions other classes may be preferred. For applications not given in Table 1, the choice of the proper classification shall be agreed by the parti

36、es concerned. All materials coming into contact with water intended for human consumption, up to a temperature of 80 C shall not present any health risk. All systems of components for use and in contact with potable water shall meet the water quality and health regulations operating in the country o

37、f use. SANS 10508:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 10508:2006(E) ISO 2006 All rights reserved 3Table 1 Classification of service conditions TDTmaxTmalTime aTime Time Application class C years C years C h Typical field o

38、f application 1 b60 49 80 1 95 100 Hot water supply (60 C) 2 b70 49 80 1 95 100 Hot water supply (70 C) 3 c20 30 40 0,5 20 25 50 4,5 65 100 Low-temperature under-floor heating 4 20 40 60 2,5 20 25 70 2,5 100 100 Under-floor heating and low-temperature radiators 5 20 60 80 14 25 10 90 1 100 100 High

39、temperature radiators NOTE This International Standard is only applicable to sealed systems which do not have values of TD, Tmaxand Tmalin excess of those stated for class 5.aWhere more than one design temperature appears for any class, the times should be aggregated (e.g. the design temperature pro

40、file for 50 years for class 5 is 20 C for 14 years, followed by 60 C for 25 years, 80 C for 10 years, 90 C for 1 year and 100 C for 100 h). bDepending upon international, national or local regulations. cOnly allowed when the malfunction temperature cannot rise above 65 C. All systems which satisfy t

41、he conditions specified in Table 1 for one of the five classes shall also be suitable for the transportation of cold water for a period of 50 years at a temperature of 20 C and a design pressure of 10 bar. This shall be demonstrated by using the standard extrapolation method specified in ISO 9080, o

42、r another appropriate extrapolation method. When the specified service life is less than 50 years, all the times given in Table 1 shall be reduced by a proportionate amount, except for the time for malfunction, which shall remain at 100 h. All heating installations should only use water or treated w

43、ater as the transfer fluid. When considering problems of material compatibility such as oxygen permeation, advice should be sought from the manufacturer. The thermal stability of the material used for the pipes or fittings shall conform to the requirements of the relevant product standard, for the i

44、ntended application. When the pipes are stated to be opaque they shall meet the minimum recommended requirement given in ISO 7686 or the relevant product standard. Not all plastics formulations allow for extended outside storage of pipes or fittings. The user shall contact the manufacturer of the pi

45、pe or fitting before considering long-term external storage. Plastics pipes and plastics fittings shall only be directly connected to a heat-generating source when recommended by the pipes or fittings manufacturer. SANS 10508:2008This s tandard may only be used and printed by approved subscription a

46、nd freemailing clients of the SABS .ISO 10508:2006(E) 4 ISO 2006 All rights reserved5 Design 5.1 Classification The appropriate class from Table 1 shall be selected for each intended application. The maximum allowable stress to a design period of 50 years shall be calculated using the stress values

47、taken from the reference curves in the relevant product standards and applying Miners Rule according to ISO 13760 with the appropriate overall service (design) coefficients given in the relevant product standard. In the absence of reference curves the maximum allowable stress shall be calculated usi

48、ng stress values obtained by an evaluation according to the extrapolation method according to ISO 9080 and using the same method as described above. 5.2 Dimensions Calculate Dp(1) and 11p(2) where is the design stress of the particular class; pDis the design pressure. 1is the design stress incorpora

49、ting an overall service (design) coefficient for the material used according to ISO 12162 at 20 C relative to a design period of 50 years; p1is the design pressure at 20 C. The lower value shall then be used to determine the minimum design wall thickness by solving the following equation: 2dep e = (3) where pis taken from Equation (1) or (2); d is the nominal outside diameter; e is the minimum design wall thickness. SANS 10508:2008This s tandard may only be used and printed by approved subscr