1、* rn * STD*BSI BS EN 1bAO-ENGL 1777 M LbZibb7 Ob22821 237 D BRITISH STANDARD Plastics piping systems - Valves for polyethylene (PE) piping systems - Test method for leaktightness under and after bending applied to the operating mechanism The European Standasd EN 1680 : 1997 has the status of a Briti
2、sh Standard ICs 23.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW KTd- ,u II - BS EN 1680 : 1997 BS 2782 : Part 11 : Method 1133A : 1997 I BS EN 1680 : 1997 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Techn
3、ical Committee PRY61, Plastics piping systems and components, upon which the following bodies were represented: British Gas pic British Plastics Federation British Plumbing Fittmgs Manufacturers Association British Valve and Acuator Manufaturers Association Chartered Institution of Water and Environ
4、ment Management Department of the Environment (British Board of Agrment) Department of the Environment (Building Research Establishment) Department of hnsport Electricity Association Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers insti
5、tution of Gas Engineers National Association of Plumbing, Heating and Mechanical Services Contractors Pipeline industries Guild Plastics Land Drainage Manufacturers Association Society of British Gas Indusries Society of British Water Industries Water Companies Association Water Services Association
6、 of England and Wales The following bodies were also represented in the drafting of this standard, through subcommittees and panek ERA Technology Ltd. Engineering Equipment and Materials Users Association RApRATechnology Ltd. This British Standard, having been prepared under the direction of the Sec
7、tor Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 July 1997 O BSI 1997 Amendments issued since publication I Text affected I Date Amd. No. The following BSI references relate to the work on this standard Committee reference PR
8、I/61 Draft for cornent 95/121246 DC ISBN O 580 27394 6 STD-BSI BS EN LbAO-ENGL 1997 e 3b24bb9 Ob22833 TUL = BS EN 1680 : 1997 Contents Committees responsible Inside hnt cover National foreword ii Foreword 2 Method 1 Scope 2 Normative references 3 principle 6 Testpieces 6 Procedure 4 Apparatus 7 Test
9、report 5 figure 1 Point of application of the bending force 4 O BSI 1997 i STD*BSI BS EN LbBII-ENGL 1997 U lb29bb9 Ob22819 998 BS EN 1680 : 1997 National foreword This British Standard has been prepared by Technical Committee PW61 and is the English language version of EN 1680 : 1997 plastics piping
10、 systems - Values for polyethylene (PE) piping systems - Test method for leaktightness under and elfter beruling applied to Uze operating rnechanisrn, published by the European Committee for standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics : Part 11 : Thmmplastics p
11、ipes, fittings and vulves as Method 1133A : 1997, for association with related test methods for plastics materiais and plastics piping components. This test method has been prepared for reference by other standards under preparation by CEN for specification of plastics piping and ducting systems and
12、 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 other national standards as practicable, but it should not be presumed to apply to any existing standard or specification
13、 which contains or makes reference to a different test method until that standardspecification has been amended or revised to make reference to this method and adjust any requirements as appropriate. Cross-references Publication referred to Corresponding British Standard BS EN 837 Fressure gauges -
14、Part 1 : 1997 Bourdon tube prwsure gauges - Dimensions, metrology, requirements and tests BS IS0 4065 : 1997 7wrrmphtics pipes - Universal wd thiclmess table BS 2782 Methods of testing pmtics - Part 11: Thmnophtics pipes, fittings and vaives - Method 1150E : 1997 Plastics pipes and fittings - Prepam
15、tion of test piece assemblies between a polyethylene (PE) pipe and an eiectrof - no materiaidependent requirements are given; - editorial changes have been introduced. The materiaidependent parameters andor performance requirements are incorporated in the System Standard(s) concerned. This standasd
16、is one of a series of standards on test methods which support System Standards for plastics piping systems and ducting systems. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standara Austsia, Bei
17、gium, Denmark, Finland, France, Gem Greece, Iceland, Ireland, I*, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 1997 STD-BSI BS EN LhO-ENGL 1777 U Lb2ibbS Ob22817 b57 1 scope This standard specifies a method for testing the ability of a valve, in
18、tended for use in polyethylene (PE) piping systems for gas supplx to maintain its pressureretaining capabilities under and after being subject to a bending moment applied to the operating mechanism (cap). 2 Normative references This standard incorporates by dated or undated reference, provisions fro
19、m other publications. These nomative references are cited at the appropriate places in the text and the publications are listed hereaftei: For dated references, subsequent amendments to or revisions of any of these publications apply to this standard oniy when incorporated in it by amendment or revi
20、sion. For undated references the latest edition of the publication referred to applies. EN 837-1 : 1994 Pressure gauges - Part 1: Bourcm Is0 4065 IS0 11413 IS0 11414 bbe pressure gauges - Dimensions, metmlogy, requirements and testing Thermoplastics pipes - Universal Wau th,i.chs table Plastics pipe
21、s and fittings - Preparation of test piece assemblies between a polyethylen (PE) pipe and an electmfusion fitting Plastics pipes a b) the number of test pieces (see 6.3). Page 3 EN 1680 : 1997 4 Apparatus 4.1 Temperature-controlled tank 4.1.1 A watertight tu) N.m on the top of the operating cap. The
22、 plane of bending shall also be perpendicular to the axis of the valve. 4.3 Ancillary equipment a) MameW, O mbarl), to 50 mbar, conforming to class 0,6 or better, in accordance with EN 837-1:1994; b) Pressure measurement davice(, capable of checking conformity to the specified pressure(s) (see 6.2);
23、 c) Tmpemture measurement We, 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 ailowing sealing and connecting to the pressurizing equipmen$ e) Loading apparatus (see 4.2); f) A davice for checking conformity t
24、o the bending rmmmt on the valve (see 4.2). 1) 1 bar = lo5 N/m2 = 0,1 MPa O BSI 1997 Page 4 I EN 1680 : 1997 I rF A Position of support F Bending force Figure 1. Point of application of the bending force 6 Bst pieces 6.1 Sampling The sampling requirements shall be as specified in the referring stand
25、ard 6.2 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 vaive, as dened in IS0 4065. The ) “C (4.1) so that the depth of immersion from the top of the ) Nem using the following equalion: F=MIL wher
26、e: F M L is the force required, in newtons, is the bending moment, in newton metses; is the distance to the Valve support, in mem. 6.1.3 Apply this force to the operating cap in the plane of the operating stem of the test piece. Keep the test piece under the bending force at specified temperature fo
27、r a minimum duration of 1 h. 6.1.4 During testing in accordance with 6.2, record any evidence of intrnal (seat) or external (stem) leakage. 6.2 Leaktightness tests 6.2.1 Pressurize the test piece pneumaticaily to a pressure of 25 mbar over and above the hydrostatic head produced by the water at the
28、top of the We spigot for at least 1 h and monitor for external leaktightness. 6.2.2 Repressurize the test piece pneumaticaily to a pressure of 6 bar or (1,5 X MOP) bar, whichever is the greater, for at least 1 h and monitor for externai lt? b) fuli identification of the product, including manufactur
29、er and production date, c) the test temperatures; d) the duration of each test; e) the test pressures applied; f) the force applied to the stem and the distance to the supports; g) the test results; h) any factors which may have afected the results, such as any incidents or any operating details not
30、 specified in this standare i) the date of test. O BSI 1997 STD-BSI BS EN 1bBO-ENGL 1777 Lb24bb9 0622820 LLiL BS EN 1680 : 1997 List of references See nalional foreword O BSI 1997 STD.BS1 BS EN LbO-ENGL 1797 W Lb24bb7 b2282L 088 M BS EN 1680 : 1997 BS 2782 : Part 11 : Method 1133A : 1997 BSI 389 Chi
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