BS EN 60534-4-2006 Industrial-process control valves - Inspection and routine testing《工业过程控制阀 检验和常规测试》.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58The European Standard EN 60534-4:2006 has the status of a British StandardICS 17.120; 19.020; 23.10

2、0 Industrial-process control valves Part 4: Inspection and routine testingBRITISH STANDARDBS EN 60534-4:2006BS EN 60534-4:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006ISBN 0 580 49324 5Amendments issued since pu

3、blicationAmd. No. Date Commentsits secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Stan

4、dard was published by BSI. It is the UK implementation of EN 60534-4:2006. It is identical with IEC 60534-4:2006. It supersedes BS 5793-4:1987 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/2, El

5、ements of systems.A list of organizations represented on GEL/65/2 can be obtained on request to EUROPEAN STANDARD EN 60534-4 NORME EUROPENNE EUROPISCHE NORM September 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komi

6、tee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60534-4:2006 E ICS 17.120; 19.020; 23.100 English version Industrial-process control

7、valves Part 4: Inspection and routine testing (IEC 60534-4:2006) Vannes de rgulation des processus industriels Partie 4: Inspection et essais individuels (CEI 60534-4:2006) Stellventile fr die Prozessregelung Teil 4: Abnahme und Prfungen (IEC 60534-4:2006) This European Standard was approved by CENE

8、LEC on 2006-09-01. CENELEC 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 standar

9、ds may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notifi

10、ed to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembour

11、g, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 65B/588/FDIS, future edition 3 of IEC 60534-4, prepared by SC 65B, Devices, of IEC TC 65, Industrial-process measurement and control, was

12、 submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60534-4 on 2006-09-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-06-01 latest date by

13、which the national standards conflicting with the EN have to be withdrawn (dow) 2009-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60534-4:2006 was approved by CENELEC as a European Standard without any modification. _ EN 60534-4:2006 2 3 E

14、N 60534-4:2006 CONTENTS 1 Scope 4 2 Normative references .4 3 Terms and definitions .4 4 Requirements.6 4.1 Hydrostatic test .6 4.2 Seat leakage test.6 4.3 Packing test 7 4.4 Rated valve travel test .7 4.5 Dead band tests 7 4.6 Additional tests7 5 Tests procedures7 5.1 Measuring instruments.7 5.2 Te

15、st medium8 5.3 Test fixtures 8 5.4 Hydrostatic test .8 5.5 Seat leak test 10 5.6 Packing test 12 5.7 Rated valve travel test .12 5.8 Dead band tests 13 Annex A (informative) Example calculations of seat leakage .15 Annex B (informative) Inspection and routine testing checklist (per IEC 60534-4) .19

16、Annex ZA (normative) Normative references to international publications with their corresponding European publications20 Figure 1 Hysteresis and dead band 5 Table 1 Tests.6 Table 2 Minimum duration of hydrostatic tests of shell 9 Table 3 Maximum seat leakage for each leakage class .11 Table 4 Maximu

17、m recommended values of dead band error. .14 Table A.1 Maximum seat leakage for each leakage class18 EN 60534-4:2006 4 INDUSTRIAL-PROCESS CONTROL VALVES Part 4: Inspection and routine testing 1 Scope This part of IEC 60534 specifies the requirements for the inspection and routine testing of control

18、valves manufactured in conformity with the other parts of IEC 60534. This standard is applicable to valves with pressure ratings not exceeding Class 2500. The requirements for actuators apply only to pneumatic actuators. This standard does not apply to the types of control valves where radioactive s

19、ervice, fire safety testing, or other hazardous service conditions are encountered. If a standard for hazardous service conflicts with the requirements of this standard, the standard for hazardous service should take precedence. NOTE This standard can be extended to higher pressure ratings by agreem

20、ent between purchaser and manufacturer. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendme

21、nts) applies. IEC 60534 (all parts), Industrial-process control valves IEC 61298 (all parts), Process measurement and control devices General methods and procedures for evaluating performance 3 Terms and definitions For the purposes of this document, the following definitions, as well as those given

22、 in IEC 60534-1 and other parts of IEC 60534, apply. 3.1 bench range range of pressures to the actuator within which the nominal travel is performed in both directions, with no pressure in the valve, but including friction forces NOTE The actuator operating range, i.e. when the valve is installed un

23、der actual process conditions, will be different from the bench range. 3.2 dead band finite range of values within which reversal of the input variable does not produce any noticeable change in the output variable (see Figure 1) 5 EN 60534-4:2006 Dead banderror x2x1Hysteresiserror y 100 % Figure 1a

24、Hysteresis 100 %Output Output Output Hysteresis error with dead bandy2y1y1y2x x Input Input Input Dead banderror 100 %100Dead band % Figure 1b Dead band Figure 1d Hysteresis with dead band IEC 1060/06 IEC 1061/06 IEC 1062/06 Figure 1 Hysteresis and dead band 3.3 dead band error maximum value of the

25、span of the dead band (over the measuring range) 3.4 hysteresis property of a device or instrument whereby it gives different output values in relation to its input values depending on the directional sequence in which the input values have been applied (see Figure 1) 3.5 hysteresis error maximum de

26、viation between the two calibration curves of the measured variable as obtained by an upscale going traverse and a downscale going traverse over the full range and subtracting the value of the dead band EN 60534-4:2006 6 3.6 type inspection and testing inspection and testing carried out by the manuf

27、acturer in accordance with its own procedures to assess whether products made by the same manufacturing process meet the requirements of the purchase order. The products inspected and tested need not necessarily be the products actually supplied 3.7 actual inspection and testing inspection and testi

28、ng carried out, before delivery, according to the technical requirements of the purchase order, on the products to be supplied or on test units of which the product supplied is part, in order to verify whether these products comply with the requirements of the purchase order 4 Requirements Each valv

29、e shall be submitted to the mandatory tests specified in Table 1. Supplementary tests given are subject to agreement between manufacturer and purchaser. Table 1 Tests Test Category Reference Shell hydrostatic test M 4.1 and 5.4 Seat leakage test M 4.2 and 5.5 Packing test S 4.3 and 5.6 Rated valve t

30、ravel (note 1) M 4.4 and 5.7 Dead band (note 1) S 4.5 and 5.8 Flow capacity S 4.6 and IEC 60534-2-3 Flow characteristic S 4.6 and IEC 60534-2-4 M = Mandatory S= Supplementary NOTE 1 The results of tests of a valve under static conditions in a factory generally do not correspond to performance under

31、working conditions. This standard is intended only to provide guidance for negotiations between manufacturer and purchaser relative to tests of a specific valve. 4.1 Hydrostatic test All control valve assemblies, excluding welded on fittings (see 5.4.5), with or without the actuator fitted, shall be

32、 subject to a hydrostatic test at the pressure stated in 5.4. 4.2 Seat leakage test The manufacturer shall advise the minimum achievable leak rate. Leakage shall be specified by the following code : X X X Leakage class as shown in Table 3: I to VI Test fluid G: air or nitrogen L: water Test procedur

33、e 1 or 2 7 EN 60534-4:2006 Example: III L 1 The seat leakage test as described in 5.5 shall be performed on each valve These seat leakage provisions do not apply to control valves with rated flow coefficients less than the following: Kv= 0,086; Cv= 0,1 Class VI is intended to apply to resilient seat

34、ed valves only. NOTE This part of the standard cannot be used as a basis for predicting leakage when the control valve is installed under actual operating conditions 4.3 Packing test This test as described in 5.6 applies to the main valve packing, secondary packing of bellows is excluded from this t

35、est. 4.4 Rated valve travel test Travel adjustment of control valves shall be verified by test in the factory as described in 5.7 4.5 Dead band tests The purpose of the dead band test is to measure the change in operating signal required to produce a reversal of stem (or shaft) movement at approxima

36、tely 25 %, 50 % and 75 % of the rated travel of the valve actuator. This test as described in 5.8 may be performed on the valve and actuator assembly (with or without positioner) or the actuator only (with or without positioner). 4.6 Additional tests Additional tests such as flow capacity, flow char

37、acteristic, stroking time, hysteresis, etc. (which are outside the scope of this standard), if required, shall be the subject of agreement between manufacturer and purchaser. 5 Tests procedures 5.1 Measuring instruments 5.1.1 General Performance of measuring instruments is based on IEC 61298. The in

38、stallation of all instruments shall be capable of meeting the requested accuracy. 5.1.2 Pressure measuring instruments The analogue or digital pressure measuring instruments used in testing shall be of the indicating or recording type but shall be installed in such a manner that they represent the a

39、ctual pressure in the component under test. The measuring equipment shall be capable of measuring the test pressure with a limit deviation of 5 % of the required test pressure. For dead band testing, the inaccuracy of the instruments shall not exceed 0,5 % of full range, and the maximum signal shall

40、 be not less than 50 % of the instrument range. EN 60534-4:2006 8 5.1.3 Flow measuring instruments The accuracy of the instruments used for measuring seat leakage shall be within 10 % of full scale and shall be used within 20 % to 80 % of the scale range. 5.1.4 Travel measuring instruments The accur

41、acy of the instruments used to measure travel shall be within 0,5 % of the rated travel. 5.1.5 Calibration It shall be the valve manufacturers responsibility to maintain the accuracy of the measuring instruments. Calibration records shall be made available upon request. 5.2 Test medium The test medi

42、um may be liquid or gas at ambient temperature as specified in each test description. a) Liquid: water at a temperature between 5 C and 50 C . The water may contain soluble oil or a rust inhibitor. b) Gas: air or nitrogen in clean condition, at a temperature between 5 C and 50 C. 5.3 Test fixtures T

43、est fixtures shall not subject the valve to externally applied stresses that may affect the results of the tests. NOTE The test equipment can apply external loads sufficient to react the forces resulting from the test pressure. When using different test equipment and procedures to that detailed in t

44、his standard, the manufacturer shall be able to demonstrate the equivalence of his test procedures and acceptance criteria with the requirements of this standard. For butt welding end valves when end plugs are used, the seal point shall be as close to the weld end as practical without over-stressing

45、 the weld preparation. 5.4 Hydrostatic test 5.4.1 Removal of internal components Components such as bellows, diaphragms, backseats or stem packing which may be damaged by the hydrostatic test pressure may be temporarily removed. 5.4.2 Test pressure Hydrostatic shell test pressure shall be according

46、to the design code or standard for the valve body or, alternatively, shall be not less than 1,5 times the 20 C rated pressure, whichever is appropriate. If a valve is dual pressure rated (inlet rating higher than outlet rating), it may be necessary to separate the high pressure portion of the valve

47、from the low pressure portion with a temporary barrier and test each portion with its respective pressure. 9 EN 60534-4:2006 5.4.3 Test procedure The test liquid shall meet the specifications of 5.2 a). The body ends shall be sealed in such a way that all cavities pressurised in service shall be sim

48、ultaneously subjected to the test pressure for not less than the duration stated in Table 2. Table 2 Minimum duration of hydrostatic tests of shell Nominal size Test duration s Up to and including DN 50 / NPS 2 15 DN 65 / NPS 2,5 to DN 200 / NPS 8 60 DN 250 / NPS 10 and over 180 During this test, th

49、e control valve shall be in the partially or fully open position. Precautions shall be taken to first purge the valve of any residual air. By agreement with the purchaser, hydrostatic tests may be conducted on components. If hydrostatic tests are conducted on the individual components, the full assembled valve shall be subjected to an air test at a pressure not to exceed 6 bar. Tightening torques applied to the body bolting shall be as intend