1、BSI Standards PublicationBS EN ISO 3459:2015Plastic piping systems Mechanical joints betweenfittings and pressure pipes Test method for leaktightnessunder negative pressureBS EN ISO 3459:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 3459:2015.It super
2、sedes BS EN 911:1996 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/88/4, Test Methods - Plastic Piping.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include
3、all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 81755 7ICS 23.040.60Compliance with a British Standard cannot confer immunity from legal obligations.This Britis
4、h Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3459 March 2015 ICS 23.040.60 Supersedes EN 911:1995English
5、Version Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method for leaktightness under negative pressure (ISO 3459:2015) Systmes de canalisations en matires plastiques - Assemblages mcaniques entre raccords et tubes sous pression - Mthode dessai pour ltanchit so
6、us pression ngative (ISO 3459:2015) Kunststoff-Rohrleitungssysteme - Mechanische Verbindungen zwischen Fittings und Druckrohren - Prfung der Dichtheit bei Unterdruck (ISO 3459:2015) This European Standard was approved by CEN on 12 December 2014. CEN members are bound to comply with the CEN/CENELEC I
7、nternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to
8、any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official
9、 versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Nor
10、way, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of expl
11、oitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3459:2015 EBS EN ISO 3459:2015EN ISO 3459:2015 (E) 3 Foreword This document (EN ISO 3459:2015) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes,fittings and valves for the transport
12、of fluids“ in collaboration Technical Committee CEN/TC 155 “Plasticspiping systems and ducting systems” the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by Sept
13、ember 2015, and conflicting national standards shall bewithdrawn at the latest by September 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. CEN and/or CENELEC shall not be held responsible for identifying any or all such pate
14、nt rights. This document supersedes EN 911:1995. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, CzechRepublic, Denmark, Estonia, Finland, For
15、mer Yugoslav Republic of Macedonia, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 3459:20
16、15 has been approved by CEN as EN ISO 3459:2015 without any modification. BS EN ISO 3459:2015ISO 3459:2015(E)Contents PageForeword iv1 Scope . 12 Principle 13 Test parameters and requirements 14 Apparatus . 14.1 Apparatus for procedure A . 14.2 Apparatus for procedure B . 25 Test pieces . 36 Procedu
17、re A: Pressure outside 47 Procedure B: Vacuum inside 48 Test report . 4Annex A (normative) Test parameters . 6 ISO 2015 All rights reserved iiiBS EN ISO 3459:2015ISO 3459:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (I
18、SO 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, gov
19、ernmental 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.The procedures used to develop this document and those intended for its further mainte
20、nance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Atten
21、tion 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. Details of any patent rights identified during the development of the document will be in the Introduction
22、 and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformi
23、ty assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 138, Plastics pipes, fittings and valves for the transport of flu
24、ids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications.This second edition cancels and replaces the first edition (ISO 3459:1976), which has been technically revised. The reason for modification is for
25、 applicability to other plastics materials, other sizes and/or other test conditions and alignment with texts of other standards on test methods. This edition of ISO 3459 is prepared under Vienna Agreement, so that the content is also aligned with the EN 911:1995, which will be replaced.The modifica
26、tions are: no material is mentioned; test parameters are omitted, although the original test parameters can be found in Annex A; no requirements are given; an alternative test procedure is introduced; editorial changes have been introduced.iv ISO 2015 All rights reservedBS EN ISO 3459:2015Plastic pi
27、ping systems Mechanical joints between fittings and pressure pipes Test method for leaktightness under negative pressureWARNING Persons using this document should be familiar with normal laboratory practice, if applicable. The use of this International Standard may involve hazardous materials, opera
28、tions, and equipment. This International Standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of regul
29、atory limitations prior to use.1 ScopeThis International Standard specifies two methods of testing for checking the leaktightness of assembled joints between mechanical fittings and plastic pressure pipes up to and including 63 mm. The test applies regardless of the design and material of the fittin
30、g used for jointing plastics pipe.This test method is not applicable to fusion-welded joints.2 PrincipleChecking of the leaktightness of an assembled joint when submitted to external pressure greater than the pressure within the pipe.For measurements where the external hydraulic pressure is greater
31、than the atmospheric pressure within the pipe, procedure A shall be used.For measurements with vacuum inside the pipe segment and an atmospheric pressure outside the pipe, procedure B shall be used.3 Test parameters and requirementsThe test parameters of the standard which refers to this test standa
32、rd shall be used and the requirements shall be fulfilled. If one or more parameters are not given in the referring International Standard, the ones given in Annex A shall apply.The following test parameters should be given by the standard which refers to this test standard:a) test medium;b) test pre
33、ssure (bar or MPa);c) test duration (h);d) test temperature (C);e) free length (mm).4 Apparatus4.1 Apparatus for procedure A4.1.1 A suitable apparatus for procedure A is shown in Figure 1.INTERNATIONAL STANDARD ISO 3459:2015(E) ISO 2015 All rights reserved 1BS EN ISO 3459:2015ISO 3459:2015(E)4.1.2 E
34、nclosed tank, capable of being used at the appropriate test pressure and receiving the test specimen. The ends of the test specimen shall pass through the walls of the tank, so that the inside of the pipe is open to the atmosphere and the connecting pipes are in axial alignment. The assembly shall b
35、e arranged so as to enable any leakage to be detected within the test specimen.4.1.3 Pressure source, connected to the tank and capable of raising and maintaining the specified water pressure with an accuracy of 0,05 bar.4.1.4 Pressure measuring device, capable of checking conformity of the test pre
36、ssure.4.1.5 Temperature control system, capable of maintaining the temperature of the pressurized water in the tank at the specified temperature, T, with an accuracy of 2 C.*Key1 connection to hydraulic pump 6 cover flange2 valve 7 annular seal3 air release valve 8 fitting to be tested4 pressure mea
37、suring device 9 sealing collar5 enclosed tank l0pipe free length* The apparatus shall permit a clear view through the test pieceFigure 1 Typical apparatus4.2 Apparatus for procedure B4.2.1 A typical test arrangement for Procedure B is shown in Figure 2.4.2.2 Vacuum source (pump), capable of producin
38、g in the test piece the partial vacuum specified in the referring standard.2 ISO 2015 All rights reservedBS EN ISO 3459:2015ISO 3459:2015(E)4.2.3 Vacuum pressure measurement device, capable of measuring the pressure in the test piece with an accuracy of 0,01 bar.4.2.4 Shut-off valve, to isolate the
39、test piece from the vacuum source.4.2.5 Thermometer(s), capable of checking conformity to the specified test temperature.4.2.6 End-sealing device, of appropriate size and sealing method for sealing the non-jointed end of the test piece. The device shall be restrained in a manner that does not exert
40、longitudinal forces on the joints.Key1 end seal2 joint under test3 pressure measurement device4 to vacuum pumpl0pipe free lengthFigure 2 Typical test arrangement5 Test piecesThe test specimen shall consist of one or more fittings and two or more pieces of plastic pressure pipe of the size and qualit
41、y for which the fitting is designed. The fittings and pipes shall not be tested until 24 h after their production. For practical reasons, the manufacturer may wait for a shorter period of time before testing. In case of dispute, a duration of 24 h shall apply.In case of using procedure B, the test p
42、iece shall be connected to the vacuum source (pump) via a line with a shut-off valve. The vacuum pressure measurement device shall be connected between the shut-off valve and the test piece.The assembly of the joint should be carried out in accordance with the manufacturers instructions.The mean out
43、side diameter, dem, of the pipe should preferably conform to the minimum specified value, and the fitting dimensions (mean inside diameter, dim) should preferably conform to the maximum values stated by the manufacturer, in order to have dimensions as close as possible to the extreme limits of their
44、 relevant tolerances. ISO 2015 All rights reserved 3BS EN ISO 3459:2015ISO 3459:2015(E)6 Procedure A: Pressure outside6.1 Secure the test specimen in the water tank. Fill the tank with water at the specified temperature and that variations in the test temperature do not exceed 2 C. Minimum condition
45、ing times are given in Table 1.Table 1 Conditioning periodsNominal wall thickness of the pipe mmMinimum conditioning period mine 10 2010 e 20 6020 e 1206.2 Remove any condensation from the inside of the test specimen. Wait for 10 min and ensure that the inside of the test specimen is completely dry.
46、6.3 After conditioning, progressively and smoothly apply a first test pressure, p1, in the shortest time practicable for at least 1 h and then smoothly increase the pressure without shock to the second level, p2. Maintain the test pressure, p2, for a further period of at least 1 h. The test starts o
47、n achieving the required test pressures.6.4 Maintain a constant reading on the pressure measuring device. Inspect the inside surface of the test piece for leakage and record any signs of leakage observed, and the pressure at which leakage occurs, while the joint is subjected to external pressure.7 P
48、rocedure B: Vacuum inside7.1 Minimum conditioning times are given in Table 2.Table 2 Conditioning periodsNominal wall thickness of the pipe mmMinimum conditioning period mine 10 2010 e 20 6020 e 1207.2 Ensure that during the procedure, the test temperature is maintained at the specified temperature
49、and that variations in the test temperature do not exceed 2 C.7.3 Evacuate the test piece to the test pressure specified in the referring standard. Record the time when the test pressure is achieved and close the shut-off valve.7.4 Record the increase of pressure, if any, in the test piece until either the test period specified in the referring standard has elapsed or prior failure of the test piece as indicated be an increase of internal pressure.8 Test reportThe test report shall include the following informatio
