BS EN 802-1995 Plastics piping and ducting systems Injection-moulded thermoplastics fittings for pressure piping systems Test method for maximum deformation by crushing《塑料管和管道系统 压力.pdf

1、BRITISH STANDARD BS EN 802:1995 BS 2782-11: Method 1114F:1995 Plastics piping and ducting systems Injection-moulded thermoplastics fittings for pressure piping systems Test method for maximum deformation by crushing The European Standard EN 802:1994 has the status of a British Standard UDC 621.643.0

2、6-986:678-073:620.173BSEN802:1995 This British Standard, having been prepared under the directionof the Sector BoardforMaterials and Chemicals, waspublished underthe authorityof the Standards Boardand comesintoeffect on 15July 1995 BSI 12-1999 The following BSI references relate to the work on this

3、standard: Committee reference PRI/61 Draft for comment 92/45389 DC ISBN 0 580 24227 7 Committees responsible for this BritishStandard The preparation of this British Standard was entrusted to Technical Committee PRI/61, Plastics piping systems and components, upon which the following bodies were rep

4、resented: 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 En

5、vironment (Property and Buildings Directorate) Department of Transport Electricity Association Federation of Civil Engineering Contractors Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers Institution of Water

6、 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 Asso

7、ciation 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. Date CommentsBSEN802

8、:1995 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Introduction 3 1 Scope 3 2 Principle 3 3 Apparatus 3 4 Test pieces 3 5 Conditioning 3 6 Procedure 3 7 Test report 4BSEN802:1995 ii BSI 12-1999 National foreword This British Standard has been

9、prepared under the direction of the Sector Board for Materials and Chemicals and is the English language version of EN 802:1994 Plastics piping and ducting systems Injection-moulded thermoplastics fittings for pressure piping systems Test method for maximum deformation by crushing, published by the

10、European Committee for Standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics Part 11: Thermoplastics pipes, fittings and valves, as Method 1114F:1995, for association with related test methods for plastics materials and plastics piping components. This test method has be

11、en 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 method to be gained and for use for other fresh applications. It is also for use for the revision or amendment of oth

12、er 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 method until that standard/specification has been amended or revised to make reference to this method and adjust any requiremen

13、ts as appropriate. WARNING NOTE. This British Standard, which is identical with EN 802:1994, 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 metho

14、d should be operated by trained personnel only. 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 obliga

15、tions. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2to4 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 insid

16、e front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 802 April 1994 UDC 621.643.06-986:678.073:620.173 Descriptors: Plastics, thermoplastics, piping, fitting, injection-moulding, pressure, crushing, test English version Plastics piping and ducting systems Injection-moulded thermoplasti

17、cs fittings for pressure piping systems Test method for maximum deformation by crushing Systmes de canalisations et de gaines en plastiques Raccords thermoplastiques mouls par injection pour canalisations avec pression Mthode dessai de dformation maximale par crasement Kunstsoff-Rohrleitungs- und Sc

18、hutzrohrsysteme Spritzgu-Formstcke aus Thermoplasten fr Druckrohrleitungen Prfverfahren fr die Verformung durch Quetschen This European Standard was approved by CEN on 1994-04-11. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

19、 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 (En

20、glish, 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark,

21、 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-10

22、50 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 802:1994 EEN802:1994 BSI 12-1999 2 Foreword This standard was prepared by CEN/TC 155, Plastics piping systems and ducting systems. This standard is based on ISO/DIS 9853:1989 Injection-moulded unplasticized poly(vinyl chloride) (PVC-U) f

23、ittings for pressure pipe systems Crushing test and basic specification, prepared by the International Organization for Standardization (ISO). It is a modification of ISO/DIS 9853:1989 for reasons of applicability to other plastics materials and/or other test conditions and alignment with texts of o

24、ther standards on test methods. The modifications are: no material is mentioned; test parameters, except those common to all plastics, are omitted; no material-dependent requirements are given; editorial changes have been introduced. The material-dependent parameters and/or performance requirements

25、are incorporated in the System Standard(s) concerned. No existing European Standard is superseded by this standard. This standard is one of a series of standards on test methods which support System Standards for plastics piping systems and ducting systems. This European Standard shall be given the

26、status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 1994, and conflicting national standards shall be withdrawn at the latest by October 1994. According to the CEN/CENELEC Internal Regulations, the following countries are bound to imp

27、lement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN802:1994 BSI 12-1999 3 Introduction This method of test was initially developed for use with

28、 unplasticized poly(vinyl chloride) (PVC-U) fittings, which can be crushed without failure if they contain little residual stress as a result of the moulding process. However, if these stresses are too great, such fittings will break while a crushing force is applied. The selection of a given percen

29、tage deformation of a fitting, in relation to its initial diameter, constitutes a simple criterion for selecting PVC-U fittings which have an acceptable level of internal stresses. The method is particularly applicable to PVC-U fittings for pressure pipelines, with solvent sockets or with sockets wi

30、th elastic sealing rings, but may be applicable to fittings of other materials, through reference by the relevant System Standard. 1 Scope This standard specifies a method for applying a crushing test to injection-moulded thermoplastics fittings intended for pressure piping systems to determine whet

31、her or not fracture will occur at a specified deformation. 2 Principle The fitting to be tested is placed between two plates of a press and subjected at a constant speed to the necessary force to give a specified percentage deformation (see6.5). The fitting is monitored for fracture before or when t

32、he specified deformation has been reached and, if applicable, the type of fracture is determined. NOTEIt is assumed that the following test parameters are set by the standard making reference to this standard: a) the speed of closure of the press plates (see3.1 and6.5); b) the minimum period, t 1 ,

33、between manufacture and testing (see5.1); c) the conditioning period, t 2(see5.2); d) the percentage deformation, X, to be attained (see6.4). 3 Apparatus 3.1 Press, capable of applying sufficient force to carry out the test, with a closing speed of the plates that can be controlled to 10% of the spe

34、cified closing speed. 3.2 Non-deformable supports, if applicable (see6.2), to permit the application of the force between the seal ring housing(s) of a fitting, or to a fitting where the shape adjacent to the socket under test is complicated. 3.3 Deformation control or measurement device, capable of

35、 setting and/or measuring the amount of deformation applied to the test piece see6.4 and item d) of the note to clause2. 4 Test pieces 4.1 Each test piece shall be a fitting in its condition as manufactured, i.e.without having been subjected to any subsequent process. 4.2 In the case of fittings con

36、taining sealing rings, the rings shall be removed before testing. 4.3 Unless otherwise specified in the referring standard, test at least three test pieces for each fitting pattern or feature, e.g. socket, cap, reducer, to be tested. If there are weld lines, provide three test pieces for testing in

37、position1 and another three for testing in position 2 (see6.2). 5 Conditioning 5.1 The fittings shall not be tested until at least t 1h after their manufacture see item b) of the note to clause2. 5.2 Before testing, condition the test pieces at(23 2) C for at least t 2h see itemc) of the note to cla

38、use2. 6 Procedure 6.1 Carry out the following procedure for at least three test pieces (see4.3) using any ambient temperature in the range of15 C to25 C providing that for each test piece the temperature does not vary by more than 2 C. 6.2 Place the fitting flat on the centre of the lower plate of t

39、he press, in such a way that the axis of the socket(s) is (are) parallel to the plane of the plate, using, if necessary, supports conforming to3.2. If there is a weld line in the fitting and if the shape of the fitting allows it, position the weld line in either position 1 or position 2, as follows,

40、 so that at least three test pieces are tested in position 1 and at least three others in position 2: a) position 1: weld line at 90 to the contact lines between the fitting and the plates of the press; b) position 2: weld line in contact with the plates. 6.3 Adjust the mobile plate until both plate

41、s, or supports (see3.2), are in contact with the fitting, without the application of force. Measure and record the distance h 0 , in millimetres, between the plates.EN802:1994 4 BSI 12-1999 6.4 For a specified percentage deformation, X, calculate the limiting distance h 1 , in millimetres, between t

42、he plates, or supports, using the following equation: where 6.5 Set the closing speed of the plates at the specified speed see item a) of the note to clause2 and start the compression. 6.6 Stop the compression when the distance between the plates, or supports, reaches h 1mm (see6.4), or when the tes

43、t piece fractures, whichever occurs first. If the test piece has fractured, record a description of the type (i.e.brittle or ductile) and position of the fracture. 7 Test report The test report shall include the following information: a) a reference to this standard and to the referring standard; b)

44、 the type of fitting and the material of which it is made; c) the nominal diameter of the fitting and any other sizes and identification; d) the type of socket(s) on the fitting; e) the number of test pieces tested; f) the conditioning period, t 2 , in hours and conditioning temperature, in degrees

45、Celsius; g) whether supports were used or not; h) if applicable, the position of the weld line in relation to the plates; i) the speed of closure of the test plates, in millimetres per minute; j) the values of h 0and h 1 , in millimetres, and X, as a percentage; k) the result of the test and, if app

46、licable, the type and position of the fracture; l) any factors which may have affected the results, such as any incidents or any operating details not specified in this standard; m) the date of test. h 0 is the distance, in millimetres, between the plates, or supports, when in contact with the test

47、piece, without applying any force (see6.3). h 1 h 0 100X () 100 - =blankBS EN 802:1995 BS 2782-11: Method 1114F:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on sta

48、ndards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality

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