1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 19892:2011Plastics piping systems Thermoplastics pipes andfittings for hot and coldwater Test method for theresistance of joints to pressurecyclingBS ISO 19892:2011 BRITIS
2、H STANDARDNational forewordThis British Standard is the UK implementation of ISO 19892:2011. The UK participation in its preparation was entrusted to TechnicalCommittee PRI/88/4, Test Methods - Plastic Piping.A list of organizations represented on this committee can be obtained on request to its sec
3、retary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 64382 8 ICS 23.040.60; 83.080.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British St
4、andard was published under the authority of the Standards Policy and Strategy Committee on 30 November2011.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 19892:2011Plastics piping systems Thermoplastics pipes and fittings for hot and cold water Test method for the resistance o
5、f joints to pressure cyclingSystmes de canalisations en plastiques Tubes en matires thermoplastiques et raccords pour leau chaude et froide Mthode dessai de la rsistance des assemblages aux cycles de pression ISO 2011Reference numberISO 19892:2011(E)First edition2011-11-01ISO19892INTERNATIONAL STAND
6、ARDBS ISO 19892:2011ISO 19892:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011All 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 writ
7、ing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerlandii ISO 2011 All rights reservedBS ISO 19892:2011F
8、orewordISO (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 through ISO technical committees. Each member body interested in a subject for which a tec
9、hnical 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters o
10、f 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 Standards. Draft International Standards adopted by the technical committees are circulated to
11、 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 this document may be the subject of patent rights. ISO shall not be held responsible for i
12、dentifying any or all such patent rights.ISO 19892 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic sp
13、ecifications .ISO 19892:2011(E) ISO 2011 All rights reserved iiiBS ISO 19892:2011BS ISO 19892:2011INTERNATIONAL STANDARD ISO 19892:2011(E)Plastics piping systems Thermoplastics pipes and fittings for hot and cold water Test method for the resistance of joints to pressure cycling1 ScopeThis Internati
14、onal Standard specifies a method for testing the resistance of joints to pressure cycling. It is applicable to piping systems based on thermoplastics pipes intended to be used in hot and cold water applications.2 PrincipleAn assembly of pipes and fittings is subjected to water pressure cycling betwe
15、en two positive pressure limits, while being maintained at a specified temperature and inspected for leakage.NOTE It is assumed that the following test parameters are set by the reference standard (i.e. the standard making reference to this International Standard), as applicable (see Clause 4):a) th
16、e test temperature;b) the number of test pieces;c) the test pressure limits;d) the duration of one cycle;e) the number of cycles.3 Apparatus3.1 Pressurizing device, capable of applying and regulating the water pressure in the test piece in a sinusoidal or trapezoidal form between pressure limits as
17、specified in the reference standard.3.2 Pressure measurement device, capable of measuring the water pressure in the test piece to an accuracy of 5 %. The device measurement shall be capable of producing a record of the sinusoidal or trapezoidal wave form.3.3 Test chamber, capable of maintaining the
18、specified test temperature (see Clause 4) to an accuracy of 2 C.3.4 Thermometer(s), capable of checking conformity to the specified test temperature (see 3.3).3.5 End-sealing device, of appropriate size and sealing method for sealing the non-joined end of the test piece. The device shall be restrain
19、ed in a manner which does not exert longitudinal forces on the joints.A typical test arrangement is shown in Figure 1. ISO 2011 All rights reserved 1BS ISO 19892:2011Key1 temperature controlled test chamber2 test assemblies3 water4 air5 pressure converter6 compressed air cylinder7 valve8 electric co
20、ntrolFigure 1 Schematic test arrangement4 Test parametersUnless specified otherwise in the reference standard, the test parameters given in Table 1 shall apply.Table 1 Test parametersParameter ValueNumber of test pieces 3Conditioning and test temperature (23 2) CTest pressure limits Shall conform to
21、 Table 3Cycle frequency (30 5) cycles per minuteNumber of cycles 10 0005 Test pieces5.1 NumberThe number of test pieces shall conform to Clause 4.ISO 19892:2011(E)2 ISO 2011 All rights reservedBS ISO 19892:20115.2 PreparationThe test piece shall comprise an assembly of pipes and at least one fitting
22、 joined in accordance with the manufacturers recommended practice.The free length on each side of the fitting under test shall be not less than either 1,5dnor 300 mm, whichever is the greater, where dnis the nominal outside diameter of the pipe.In order to include the required number of pipes and fi
23、tting(s), several test pieces may be tested simultaneously, provided the failure of one test piece does not affect the others under test.6 Conditioning6.1 Fill each test piece with water so that all the air is expelled.6.2 Bring the test piece and water therein to the specified temperature (see Clau
24、se 4).6.3 Condition the test piece at the applicable temperature (see Clause 4) in accordance with Table 2 before or after connecting the test piece(s) to the pressurizing device. If subsequent connection is necessary, ensure that all air is again expelled and that the conditioning has been complete
25、d immediately before connection to the pressurizing device.Table 2 Conditioning periodsPipe wall thicknessemmMinimum conditioning periodhe 33 e 88 e 1616 e 32136107 Procedure7.1 Unless specified otherwise in the reference standard, subject the test piece to the applicable pressure limits conforming
26、to Table 3 and for the number of cycles and cycle frequency conforming to Clause 4, while, for the duration of the test and on completiona) maintaining the test temperature,b) monitoring the test piece for any signs of leaks, andc) checking wave form at the start, at regular intervals and at the end
27、 of the test and recording them.ISO 19892:2011(E) ISO 2011 All rights reserved 3BS ISO 19892:2011Table 3 Test pressure limitsDesign pressurepDTest pressure limitsbarUpper limitbarLower limitbar468106912150,50,50,50,5NOTE 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2.7.2 If leakage occurs prior to complet
28、ion of the number of cycles, record the number of elapsed cycles and the position and nature of the leak.7.3 On completion of the number of cycles, inspect all joints for any sign of leakage.8 Test reportThe test report shall include the following information:a) a reference to this International Sta
29、ndard, i.e. ISO 19892:2011, and to the reference standard;b) the material and other identification and the number of the components under test, including their operating pressure;c) the test temperature;d) the test pressures comprising the lowest and the highest of the cycle;e) the cycle frequency;f
30、) the number of cycles;g) a record of the wave form at the start, at regular intervals and at the end of each test;h) the signs of leakage, if any, and where and when they occurred;i) any factors which can have affected the results, such as any incident or any operating detail not specified in this
31、International Standard;j) the date of test.ISO 19892:2011(E)4 ISO 2011 All rights reservedBS ISO 19892:2011BS ISO 19892:2011ISO 19892:2011(E) ISO 2011 All rights reservedICS 23.040.60; 83.080.20Price based on 4 pagesThis page deliberately left blankBSI is the independent national body responsible fo
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