BS EN 28659-1992 Thermoplastics valves - Fatigue strength - Test method《热塑性塑料阀门 疲劳强度 试验方法》.pdf

1、BRITISH STANDARD BS EN 28659:1992 BS2782-11: Method1132: 1992 ISO8659:1989 Thermoplastics valves Fatiguestrength Test method The European Standard EN28659:1990 has the status of a BritishStandard UDC621.646-036.073:620.169.1BSEN28659:1992 This BritishStandard, having been prepared under the directio

2、nof the Plastics and Rubber Standards Policy Committee, was published underthe authority of the Standards Board and comes intoeffect on 15October1992 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference PRM/61 Announced in BSI News, August1992 ISBN 0 580 2

3、1168 1 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisatio

4、n Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of I

5、reland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiserin

6、gskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom BritishStandards Institution Amendments issued since publication Amd. No. Date CommentsBSEN28659:1992 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text

7、of EN 28659 3 National annex NA (informative) Committees responsible Inside back coverBSEN28659:1992 ii BSI 01-2000 National foreword This BritishStandard has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is the English language version of EN28659:1990 T

8、hermoplastics valves Fatigue strength Test method, published by the European Committee for Standardization (CEN). EN28659:1990 is identical with ISO8659:1989 published by the International Organization for Standardization (ISO). A British Standard does not purport to include all the necessary provis

9、ions 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, pagesi andii, theEN title page, p

10、ages2 to4, an inside back cover 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN28659 December1990 UDC 621.646-0

11、36.073:620.169.1 Descriptors: Plastics, thermoplastics resins, cocks, torque, fatigue tests, fatigue life English version Thermoplastics valves Fatigue strength Test method (ISO8659:1989) Robinets en matriaux thermoplastiques Rsistance la fatigue Mthode dessai (ISO8659:1989) Armaturen aus Thermoplas

12、ten Ermdungsfestigkeit Prfverfahren (ISO8659:1989) This European Standard was approved by CEN on1990-11-08. 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 alterat

13、ion. 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, German). A version in any other language made by translat

14、ion 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,

15、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 1990 Copyright reserved to CEN members Ref.No.EN28659:1990EE

16、N28659:1990 BSI 01-2000 2 Foreword Based on the positive result of the Formal Vote procedure, the International Standard ISO8659:1989 “Thermoplastics valves Fatigue strength Test method” is adopted as a European Standard. In accordance with the Common CEN/CENELEC Rules, the following countries are b

17、ound to implement this standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 3.1 nominal pre

18、ssure (PN) 3 3.2 closing torque 3 3.3 fluid velocity 3 3.4 reference dimensions 3 4 Apparatus 3 5 Procedure 3 5.1 Test requirements to be taken from product standards 3 5.2 Endurance test 4 6 Test report 4EN28659:1990 BSI 01-2000 3 1 Scope This International Standard specifies the endurance test nec

19、essary to confirm the ability of hand-operated plastics valves to withstand prolonged use, with repeated opening and closure. It does not specify the ability of valves to withstand adverse conditions, in particular those of chemically agressive fluid media and/or environments, or excessive fluid vel

20、ocities and cavitation. This International Standard includes values of the parameters necessary for the proper performance of the endurance test, with the reservation that parameters may be different in particular product standards (see5.1). 2 Normative references The following standards contain pro

21、visions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the

22、possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO161-1:1978, Thermoplastics pipes for the transport of fluids Nominal outside diameters and nominal pressures Part1: Metric series.

23、ISO6708:1980, Pipe components Definition of nominal size. ISO7005-2:1988, Metallic flanges Part2: Cast iron flanges. ISO7005-3:1988, Metallic flanges Part3: Copper alloy and composite flanges. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 nominal

24、 pressure (PN) an alphanumerical designation of pressure, used for reference purposes, which is related to the mechanical strength of the valve. Usually it corresponds to the pressure of water at20 C, inbars, for which the valve is designed (seealsoISO161-1) 3.2 closing torque torque required to clo

25、se a valve to full tightness at the nominal pressure 3.3 fluid velocity the velocity of a fluid in a pipe connected to a valve of nominal size equivalent to the nominal diameter of the pipe 3.4 reference dimensions the following are considered to be the reference dimensions: nominal size DN (see ISO

26、6708) for flanged systems (see ISO7005-2 and ISO7005-3); nominal outside diameter D for tubes (seeISO 161-1). 4 Apparatus Test apparatus, capable of testing the whole valve assembly with its obturator mechanism. Furthermore, it shall include appropriate devices to perform each step separately, or co

27、ntinuously and automatically. The test apparatus shall include appropriate means to discontinue the test cycle during the pressure period and to maintain the pressure in the closed position. Pressure gauges shall be accurate to within1% of the full-scale reading. Temperature sensors shall be accurat

28、e to within 2 C. NOTEAttention is drawn to the need for adequate safety precautions when using compressed air or gas for this test. 5 Procedure 5.1 Test requirements to be taken from product standards The following specifications shall be taken from the particular product standard. a) any tests whic

29、h shall be performed before the endurance test, and those which shall be repeated after completion of the endurance test; b) whether tightening of the gland packing (if used) during the endurance test is allowed; c) acceptance criteria for tests; d) the number of specimens to be tested; e) the numbe

30、r of test cycles to be performed; f) the fluid used for the test, and its temperature, pressure and velocity; g) the ambient temperature.EN28659:1990 4 BSI 01-2000 5.2 Endurance test The endurance test, using water, air or gas as the fluid medium, at the temperature, pressure and velocity specified

31、in the particular product standard, shall be carried out, at the ambient temperature specified in the product standard, as follows. 5.2.1 Open multiple-turn valves to the fully open position at a hand-wheel speed of40r/min 10r/min for valves of nominal size up to DN50 and20r/min 10r/min for valves o

32、f nominal size greater than DN50. For quarter-turn valves, the opening time shall be not less than2s for valves of nominal size up to DN50 and not less than4s for valves of nominal size greater than DN50. The valve shall be left in the open position for at least5s, but not longer than20s. 5.2.2 Clos

33、e multiple-turn valves at a hand-wheel speed of40r/min 10r/min. For quarter-turn valves, the closing time shall be not less than1s. 5.2.3 Closing shall be performed using the torque specified in the particular product standard. During opening and closing, there shall be no visible leakage at any sea

34、l. 5.2.4 After the valve has been closed, an internal pressure shall be applied as specified in the particular product standard. The valve shall be left in the closed position for at least5s, but no longer than20s. 5.2.5 The valve shall be opened as described in5.2.1. 5.2.6 The test procedure descri

35、bed in5.2.1 to5.2.5 shall be repeated for as many cycles as required by the particular product standard. 6 Test report The test report shall include at least the following information: a) a reference to this International Standard and to the product standard; b) a complete identification of the valv

36、e, giving the following information: 1) the material of the valve body, 2) the nominal size (DN) and the socket diameter or spigot diameter, 3) the nominal pressure (PN) of the valve, 4) the manufacturers name or trade mark, 5) the type of pipe used, 6) if necessary, the flow direction, 7) the closi

37、ng torque; c) a description of the test conditions; d) the number of specimens tested; e) whether the valve complied with the test requirements if the valve failed (leakage or fracture) indicate under what conditions it failed; f) any operation not laid down in this International Standard, or other

38、occurrences which may have affected the test results; g) the date of the test.BSEN28659:1992 BSI 01-2000 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Plastics and Rubber Standards Policy Comm

39、ittee (PRM/-) to Technical Committee PRM/61, upon which the following bodies were represented: British Board of Agrment British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers Association British Valve and Actuator Manufacturers Association Department of the Environment (

40、Building Research Establishment) Department of the Environment (Construction Directorate) Department of the Environment (Property Services Agency) Department of Transport Electricity Association Engineering Equipment and Materials Users Association Federation of Civil Engineering Contractors Health

41、and Safety Executive Institute of Building Control 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 and Rubber Institute Plast

42、ics Land Drainage Manufacturers Association Royal Institute of Public Health and Hygiene Society of British Gas Industries Society of British Water Industries Water Companies Association Water Research Centre Water Services Association of England and WalesBS EN 28659:1992 BS2782-11: Method1132: 1992

43、 ISO8659:1989 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 standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British

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