BS EN 713-1995 塑料管道系统.配件和聚烯烃压力管的机械接合.弯曲时组件内部压力密封性的试验方法.pdf

BRITISH STANDARD BS EN 7131995 BS 2782-11 1123B1995 Incorporating Amendment No. 1 Plastics piping systems Mechanical joints between fittings and polyolefin pressure pipes Test for leaktightness under internal pressure of assemblies subjected to bending The European Standard EN 7131993 has the status of a British Standard UDC 621.643.4-036621.643.2.06620.165.29 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI BS EN 7131995 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1995 BSI 11-1999 The following BSI references relate to the work on this standard Committee reference PRI/61 Draft for comment 92/41353 DC ISBN 0 580 23966 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/61, Plastics piping systems and components, upon which the following bodies were represented British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers’ Association British Valve and Actuator Manufacturers’ Association Department of the Environment British Board of Agrment Department of the Environment Building Research Establishment Department of the Environment Property and Buildings Directorate Department of Transport Electricity Association Federation of Civil Engineering Contractors Health and Safety cutive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers Institution of Water and Environmental Management National Association of Plumbing, Heating and Mechanical Services Contractors Pipeline Industries Guild Plastics Land Drainage Manufacturers’ Association Society of British Gas Industries Society of British Water Industries Water Companies Association Water Services Association of England and Wales The following bodies were also represented in the drafting of the standard, through subcommittees and panels ERA Technology Ltd. Engineering Equipment and Materials Users’ Association RAPRA Technology Ltd. Amendments issued since publication Amd. No.DateComments 8876October 1995Indicated by a sideline in the margin Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI BS EN 7131995 BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Principle3 4Apparatus3 5Test piece3 6Procedure5 7Test report5 Figure 1 Diagram of typical apparatus4 Table 1 Bending radius, R, as a function of the nominal pressure of the pipe4 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI BS EN 7131995 ii BSI 11-1999 National foreword This British Standard has been prepared by Technical Committee PRI/61 and is the English language version of EN 7131993 Plastics piping systems Mechanical joints between fittings and polyolefin pressure pipes Test for leaktightness under internal pressure of assemblies subjected to bending, published by the European Committee for Standardization CEN. It is incorporated into BS 2782 s of testing plastics Part 11 Thermoplastics pipes, fittings and valves, as 1123B1995, for association with related test s for plastics materials and plastics piping components. This test has been prepared for reference by other standards under preparation by CEN for specification of plastics piping systems and components. It has been implemented to enable experience of the to be gained and for use for other fresh applications. It is also for use for the revision or amendment of other national standards as practicable, but it should not be presumed to apply to any existing standard or specification which contains or makes reference to a different test until that standard/specification has been amended or revised to make reference to this and adjust any requirements as appropriate. WARNING. This British Standard which is the English language version of EN 7131993 does not necessarily detail all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and the should be operated only by trained personnel. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 5 and a back cover. This standard has been updated see copyright date and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 713 November 1993 UDC 621.643.4-036621.643.2.06620.165.29 Descriptors Pipelines, pressure pipes, plastics pipes, polyolefins, pipe fittings, joints, watertightness, pressure tests English version Plastics piping systems Mechanical joints between fittings and polyolefin pressure pipes Test for leaktightness under internal pressure of assemblies subjected to bending Systmes de canalisations plastiques Assemblages mcaniques entre raccords et tubes en polyolefine avec pression Essai d’tanchit sous pression interne des assemblages soumis une courbure Kunststoff-Rohrleitungssysteme Mechanische Verbindungen zwischen stcken und Druckrohren aus Polyolefinen Prfverfahren fr die Dichtheit unter Innendruck und Biegung This European Standard was approved by CEN on 1993-11-25. CEN members are bound to comply with the CEN/CENELEC Internal 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions English, French and 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 7131993 E Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 7131993 BSI 11-1999 2 Foreword This standard was prepared by CEN/TC 155, Plastics piping systems and ducting systems. This standard is based on the International Standard ISO 35031976 Assembled joints between fittings and polyethylene PE pressure pipes Test of leakproofness under internal pressure when subjected to bending, published by the International Organization for Standardization ISO. It is a modification of ISO 35031976 for reasons of applicability to other plastics materials and/or other test conditions and alignment with texts of other standards on test s. The modifications are no specific polyolefins are mentioned; test parameters, except those common to all polyolefins, are omitted; no diameter limit is included; no material-dependent requirements are given; editorial changes have been introduced. The material-dependent parameters and/or perance requirements are incorporated in the System Standards concerned. No existing European Standard is superseded by this standard. This standard is one of a series of standards on test s which support System Standards for plastics piping systems and ducting systems. This standard has been prepared under a mandate given to CEN by the Commission of the European Communities and the European Free Trade Association, and supports essential requirements of the EC Directives. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 1994, and conflicting national standards shall be withdrawn at the latest by May 1994. The Standard was approved and in accordance with the CEN/CENELEC Internal Regulations the following countries are bound to implement this European Standard Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 7131993 BSI 11-19993 1 Scope This European Standard specifies a for checking the leaktightness under internal hydrostatic pressure of assembled mechanical joints excluding fusion-welded joints between fittings and polyolefin pressure pipes while subjected to bending. It details a calculation for the average bending radius and the procedure for achieving this bending see note. Checking of the leaktightness under internal pressure is carried out in accordance with the given in EN 715. The test is applicable regardless of the design and material of the fitting used for jointing pipes. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 715, Plastics piping systems Mechanical joints between pressure pipes and fittings Test for leaktightness under internal pressure. 3 Principle The leaktightness of the joint is checked for an assembly comprising a pipe onto at least one end of which is mounted a fitting characteristic of the type under test and through which the necessary forces are applied for bending the pipe throughout its free length. The bend has an average radius calculated as a function of the nominal diameter of the pipe and its nominal pressure. The bent test piece and its joint are subjected at a specified temperature to a specified internal hydrostatic pressure for a specified period and by increasing pressure until the joint fails by leakage or the pipe bursts. NOTEIt is assumed that the following test parameters are set by the standard making reference to this standard a if applicable, the bending radius, R, in millimetres see 4.1; b the test pressure, p, in bars; c the time under pressure, t, in minutes; d the test temperature, T, in degrees Celsius; e the maximum diameter for which this test is applicable. 4 Apparatus WARNING. It is necessary to take account of consequences of failure of the components under pressure and to contain the test piece or apparatus accordingly, e.g. immersed in water or caged. 4.1 Bending-gauge, having a bearing length, l, equal to three-quarters of the free length, L, between fittings, i.e. equal to 7,5 times the nominal outside diameter of the pipe, dn see clause 5 and Figure 1, where a typical apparatus is shown. This bearing length, l, shall have a bending radius, R, equal to that specified for the pipe under test, as given in Table 1, unless otherwise specified in the referring standard. NOTE4.1 applies unless otherwise specified in the referring standard. 4.2 Hydrostatic pressurizing system, coning to EN 715. 5 Test piece The test piece shall be constructed using a pipe of a type and size to suit the design of the fitting to be tested. Pipes and fittings to be assembled shall be at least 24 h old. The assembly of the joint shall be carried out in accordance with the manufacturer’s instructions such that testing can be conducted in accordance with EN 715, except that after assembly the free length, L, of the pipe between the fittings shall be 10 times the nominal outside diameter of the pipe. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 7131993 4 BSI 11-1999 Table 1 Bending radius, R, as a function of the nominal pressure of the pipe * The end fitting is only used for closing the test piece. Figure 1 Diagram of typical apparatus Nominal pressureR k 10 bara15 dn 10 bar20 dn a 1 bar 105 N/m2. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Sun Dec 24 042946 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 7131993 BSI 11-19995 6 Procedure WARNING. All necessary precautions should be taken when testing using components under pressure. Carry out the test with an average bending radius, R, complying with Table 1, unless otherwise specified in the referring standard. Set up the test piece on the bending-gauge in conance with both the following conditions a the bending stresses shall be supported by the fittings; b the pipe shall be applied to the entire length of the bending-gauge so that, beyond the ends of the supported portion, two free pipe sections equal in length are available, each equivalent to about one-eighth of the free length. Apply the specified internal hydrostatic pressure for the specified period and at the specified temperature to the mounted test piece in accordance with EN 715. Inspect the test piece for leaks under internal pressure, for at least the specified period, in accordance with EN 715. Unless a joint fails by leakage, continue the test by increasing the pressure at the rate used to establish the specified pressure until the pipe bursts. 7 Test report The test report shall include the following ination a a reference to this standard and to the referring standard; b the identities of the components e.g. fittings, pipe c