BS-5793-4-1987 IEC-60534-4-1982.pdf
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1、BRITISH STANDARD BS 5793-4: 1987 IEC 534-4: 1982 (including Amendment No. 1 August 1986) Industrial-process control valves Part 4: Specification for inspection and routine testing UDC 66.025:621.646.3:681.533.3:004.58:620.1 BS 5793-4:1987 This British Standard, having been prepared under the directi
2、on of the Industrial-process Measurement and Control Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 October 1987 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PCL/1 Draft for comment 80/21854
3、DC ISBN 0 580 16246 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Industrial-process Measurement and Control Standards Committee (PCL/-) to Technical Committee PCL/1, upon which the following bodies were represented: British Coal Bri
4、tish Gas Corporation British Pressure Gauge Manufacturers Association Department of Energy (Gas and Oil Measurement Branch) Department of Trade and Industry (National Weights and Measures Laboratory) Energy Industries Council Engineering Equipment and Materials Users Association GAMBICA (BEAMA Ltd.)
5、 Health and Safety Executive Institution of Gas Engineers The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Chemical Engineering Contractors Association British Valve Manufacturers Association Ltd. Electricity Supply Industry in Eng
6、land and Wales Amendments issued since publication Amd. No.Date of issueComments BS 5793-4:1987 BSI 08-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Information supplied by the purchaser1 3Inspection1 4Pressure and leak tests2 5Performance tests5 Table 1 H
7、ydrostatic test pressure3 Table 2 Duration of hydrostatic tests of shell3 Table 3 Maximum seat leakage for each leakage class5 Table 4 Class VI: Leakage factors6 Publication referred toInside back cover BS 5793-4:1987 ii BSI 08-1999 National foreword This Part of BS 5793 has been prepared under the
8、direction of the Industrial-process Measurement and Control Standards Committee. It is identical with IEC Publication 534-4:1985 “Industrial-process control valves Part 4: Inspection and routine testing ” including Amendment No. 1 published by the International Electrotechnical Commission (IEC). Ter
9、minology and conventions. The text of the international standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. In
10、British Standards it is current practice to use the symbol “mL” for millilitres rather than “ml”. The reference to “other parts of IEC Publication 534” in clause 1 should be read as “other Parts of BS 5793”. Cross-reference. The Technical Committee has reviewed the provisions of IEC Publication 534-
11、1, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. 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. Complian
12、ce 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, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have h
13、ad amendments incorporated. This will be indicated in the amendment table on the inside front cover. BS 5793-4:1987 BSI 08-19991 1 Scope This standard specifies the requirements for the inspection and routine testing of control valves manufactured in conformity with the other parts of IEC Publicatio
14、n 534. When specified, the inspection and test requirements shall be taken from this part in conjunction with any additional information required by Sub-clause 2.1 or a code of practice stated by the purchaser. This standard does not apply to the types of control valves where radioactive service, fi
15、re 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 shall take precedence. This standard is applicable only to valves with pressure ratings not exceeding PN
16、100 (Class 600). 2 Information supplied by the purchaser 2.1 If test conditions outside the requirements of this standard are required, they shall be the subject of agreement between manufacturer and purchaser. 2.2 Certain clauses in this standard permit alternative test requirements. The purchaser
17、shall inform the manufacturer, preferably at the time of enquiry, and certainly in the purchase order, of the following: whether inspection by the purchaser at the manufacturers plant is required; whether any special performance tests are required; whether any special material tests are required; wh
18、ether any supplementary inspection requirements for castings, forgings or welded assemblies and associated test certificates are required; whether repair of defects is prohibited, or whether records of such repairs are required; whether a test fluid other than water at ambient temperature is require
19、d and, if so, the precise details of any alternative method and/or fluid; whether or not control valve test certificates are required. 3 Inspection 3.1 Inspection at manufacturers plant If specified in the purchase order, the control valve shall be inspected by the purchasers inspector (or his appoi
20、nted representative) accompanied by an authorized representative of the manufacturer at the place of manufacture. This inspection shall be so conducted as not to interfere unnecessarily with the manufacturers programme. The inspector shall be allowed access at all reasonable times, but only to those
21、 parts of the manufacturers plant which are concerned with the assembly and testing of the control valves. The inspector shall be afforded all reasonable facilities for checking that the control valves are manufactured in accordance with the requirements of this standard and the purchase order. When
22、 inspection by the purchaser has been stipulated, the control valve manufacturer shall normally give notice of the availability of the control valves for inspection or test as agreed with the purchaser. 3.1.1 Scope of inspection by the purchaser Normal inspection by the purchaser shall be limited to
23、: a) visual examination of any finished component at the assembly stage; b) visual and dimensional check of the finished control valve to ensure compliance with purchase order specifications of those dimensions which will affect installation of the control valve in the purchasers facility; c) witnes
24、sing of shell pressure tests, as specified in Clause 4 and, where applicable, seat pressure tests as referenced in Sub-clause 5.4; d) witnessing of performance tests, where applicable, as specified in Clause 5. NOTE Any part of the inspection procedure may be waived by the inspector. 3.1.2 Inspectio
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