1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1680 : 1997 BS 2782
2、 : Part 11 : Method 1133A : 1997 The European Standard EN 1680 : 1997 has the status of a British Standard ICS 23.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Plastics piping systems Valves for polyethylene (PE) piping systems Test method for leaktightness under and
3、after bending applied to the operating mechanismBS EN 1680 : 1997 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 July 1997 BSI 1997 The following BSI
4、 references relate to the work on this standard: Committee reference PRI/61 Draft for comment 95/121246 DC ISBN 0 580 27394 6 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Tec
5、hnical 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 Acuator Manufacturers Association Chartered Institution of Water and En
6、vironment Management Department of the Environment (British Board of Agre ment) Department of the Environment (Building Research Establishment) Department of Transport Electricity Association Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engine
7、ers Institution of Gas Engineers 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 A
8、ssociation of England and Wales The following bodies were also represented in the drafting of this standard, through subcommittees and panels: ERA Technology Ltd. Engineering Equipment and Materials Users Association RAPRA Technology Ltd.BS EN 1680 : 1997 BSI 1997 i Contents Page Committees responsi
9、ble Inside front cover National foreword ii Foreword 2 Method 1 Scope 3 2 Normative references 3 3 Principle 3 4 Apparatus 3 5 Test pieces 4 6 Procedure 4 7 Test report 5 Figure 1 Point of application of the bending force 4ii BSI 1997 BS EN 1680 : 1997 1) Under preparation. National foreword This Br
10、itish Standard has been prepared by Technical Committee PRI/61 and is the English language version of EN 1680 : 1997 Plastics piping systems Valves for polyethylene (PE) piping systems Test method for leaktightness under and after bending applied to the operating mechanism, published by the European
11、 Committee for Standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics : Part 11 : Thermoplastics pipes, fittings and valves as Method 1133A : 1997, for association with related test methods for plastics materials and plastics piping components. This test method has been p
12、repared for reference by other standards under preparation by CEN for specification of plastics piping and ducting 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 amendmen
13、t 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 method until that standard/specification has been amended or revised to make reference to this method and adjust any re
14、quirements as appropriate. Cross-references Publication referred to Corresponding British Standard EN 837-1 : 1996 (see note 2) BS EN 837 Pressure gauges Part 1 : 1997 Bourdon tube pressure gauges Dimensions, metrology, requirements and tests ISO 4065 BS ISO 4065 : 1997 Thermoplastics pipes Universa
15、l wall thickness table ISO 11413 BS 2782 Methods of testing plastics Part 11: Thermoplastics pipes, fittings and valves Method 1150E : 1997 Plastics pipes and fittings Preparation of test piece assemblies between a polyethylene (PE) pipe and an electrofusion fitting ISO 11414 Method 1130B : 1997 1)
16、Plastics pipes and fittings Preparation of test piece assemblies between pipe/pipe or pipe/fitting in polyethylene (PE) by butt fusion NOTE 1. In the descriptors, the term driving squares is irrelevant: it appears to be a mistranslation of a French descriptor for closing torque. The term cocks shoul
17、d be read as valves. NOTE 2. In clause 2, for EN 837-1 the reference to 1994 appears to correspond to the issue of prEN 837-1. NOTE 3. In 5.2, reference has been introduced to the same classification system of the pipes and the valve, without reference to the basis thereof. Technical Committee PRI/6
18、1 considers this to be a reference to the material classification number according to EN ISO 12162 : 1995 (” BS EN ISO 12162 : 1996 and BS 2782 : Part 11 : Method 1121 : 1996) NOTE 4. In 6.2.2, reference has been introduced to the acronym MOP, without reference to the basis thereof. Technical Commit
19、tee PRI/61 considers this to be a reference to maximum operating pressure (MOP) according to prEN 12008-1 Specific functional recommendations for PE systems MOP#10 bar and that otherwise the relevant MOP has to be identified by the standard making reference to this standard as though this was a furt
20、her item in the list in the note which follows clause 3, to support 6.2.2. Warning note. This British Standard, which is identical with EN 1680 : 1997, does not necessarily detail all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should
21、be paid to any appropriate safety precautions and the method should be operated only by trained personnel. 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
22、EN title page, pages 2 to 6, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members Ref. No. EN 1680 : 1997 E
23、 EUROPEAN STANDARD EN 1680 NORME EUROPE ENNE EUROPA ISCHE NORM January 1997 ICS Descriptors: Plastic tubes, gas pipelines, cocks, driving squares, pressure tests, leak tests, bend tests, verification English version Plastics piping systems Valves for polyethylene (PE) piping systems Test method for
24、leaktightness under and after bending applied to the operating mechanism Syste mes de canalisations en plastique Robinets pour les syste mes de canalisations en polye thyle ne (PE) Me thode dessai de tanche ite sous et apre s une flexion applique ea um e canisme dentra nement Kunststoff-Rohrleitungs
25、systeme Armaturen fu r systeme aus Polyethylen (PE) Pru fverfahren fu r die Dichtheit wa hrend und nach der Aufbringung eines Biegemomentes auf den Beta tigungsmechanismus This European Standard was approved by CEN on 1996-11-07. CEN members are bound to comply with the CEN/CENELEC Internal Regulati
26、ons 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 any CEN member. This European
27、 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 Central Secretariat has the same status as the official versions. CEN members are the national
28、 standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1680 : 1997 BSI 1997 Foreword This European Standard has been prepared by Technical Committee
29、CEN/TC 155, Plastics piping systems and ducting systems, the secretariat of which is held by NNI. 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 July 1997, and conflicting national standards shal
30、l be withdrawn at the latest by July 1997. This standard is based on the International Standard ISO/DIS 10933 Polyethylene (PE) valves for gas distribution systems, published by the International Organization for Standardization (ISO). It is a modification of ISO/DIS 10933 for reasons of applicabili
31、ty to other plastics materials and/or other test conditions and alignment with texts of other standards on test methods. The modifications are: test parameters are omitted; no material-dependent requirements are given; editorial changes have been introduced. The material-dependent parameters and/or
32、performance requirements are incorporated in the System Standard(s) concerned. This standard is one of a series of standards on test methods which support System Standards for plastics piping systems and ducting systems. According to the CEN/CENELEC Internal Regulations, the national standards organ
33、izations of 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 and the United Kingdom.Page 3 EN 1680 : 1997 BSI 1997 1) 1 ba
34、r = 10 5 N/m 2 = 0,1 MPa 1 Scope This standard specifies a method for testing the ability of a valve, intended for use in polyethylene (PE) piping systems for gas supply, to maintain its pressure-retaining capabilities under and after being subject to a bending moment applied to the operating mechan
35、ism (cap). 2 Normative references This 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 revi
36、sions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 837-1 : 1994 Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements
37、and testing ISO 4065 Thermoplastics pipes Universal wall thickness table ISO 11413 Plastics pipes and fittings Preparation of test piece assemblies between a polyethylene (PE) pipe and an electrofusion fitting ISO 11414 Plastics pipes and fittings Preparation of test piece assemblies between pipe/pi
38、pe or pipe/fitting in polyethylene (PE) by butt fusion 3 Principle A bending moment is applied to the operating mechanism of a valve in the plane of its operating stem and at the position of its operating cap. The valve, in a half-open pressurized condition in an assembly with PE pipes, is then test
39、ed for external leaktightness. Following removal of the bending moment the valve is tested for internal and external leaktightness when subjected to pressure testing. NOTE. It is assumed that the following test parameters are set by the standard making reference to this standard: a) the sampling req
40、uirements (see 5.1); b) the number of test pieces (see 5.3). 4 Apparatus 4.1 Temperature-controlled tank 4.1.1 A watertight tank, capable of accommodating a valve test assembly (5.1) and loading apparatus (4.2). 4.1.2 Thermostatic control, capable of maintaining the water within the tank (4.1.1), ar
41、ound the test assembly at C ( 20 21 +3 ) 4.2 Apparatus A steel frame or other similar member capable of supporting the valve during the test, as shown in figure 1. The supports shall be applied to the spigot ends of the valve or to the pipework adjacent to the fused sockets, as applicable. The frame
42、 shall be constructed so that a bending moment can be applied directly onto the operating stem with the force being generated by weights or other loading apparatus. The bending force shall be applied in the plane of the operating stem to create a bending moment of Nm on the top of the operating cap.
43、 The plane ( 55 25 +0 ) of bending shall also be perpendicular to the axis of the valve. 4.3 Ancillary equipment a) Manometer, 0 mbar 1) , to 50 mbar, conforming to class 0,6 or better, in accordance with EN 837-1:1994; b) Pressure measurement device(s), capable of checking conformity to the specifi
44、ed pressure(s) (see 6.2); c) Temperature measurement device, capable of checking conformity to 4.1.2 and 6.1; d) End closures, connected to the ends of the valve by means of an appropriate system and allowing sealing and connecting to the pressurizing equipment; e) Loading apparatus (see 4.2); f) A
45、device for checking conformity to the bending moment on the valve (see 4.2).Page 4 EN 1680 : 1997 BSI 1997 A Position of support F Bending force Figure 1. Point of application of the bending force 5 Test pieces 5.1 Sampling The sampling requirements shall be as specified in the referring standard. 5
46、.2 Preparation of test pieces The test pieces shall comprise a test assembly having PE pipes of the same classification system and/or the same SDR as the valve, as defined in ISO 4065. The test piece assembly shall be made in accordance with ISO 11413 or ISO 11414, as applicable, so that each pipe i
47、s fused to an end of the valve and fitted with a pressure test enclosure. The valve shall be in the half-open position. The test assembly shall be positioned into the loading apparatus (4.2) with the operating stem centrally located beneath the loading mechanism. 5.3 Number of test pieces The number
48、 of test pieces shall be as specified in the referring standard. 6 Procedure 6.1 General 6.1.1 Application of bending force Connect the air supply to the test piece. Place the test piece in the water tank maintained at C (4.1) ( 20 21 +3 ) so that the depth of immersion from the top of the valve spi
49、got end to the surface of the water does not exceed 550 mm. Measure and record the immersion depth to the top of the valve spigot. 6.1.2 Calculate the applied force to create a bending moment of Nm using the following equation: ( 55 25 +0 ) F=M/L where: F is the force required, in newtons; M is the bending moment, in newton metres; L is the distance to the valve support, in metres. 6.1.3 Apply this force to the operating cap in the plane of the operating stem of
