Where requirements in a product or performance standard differ from those given in this European Standard, the requirements of the product or performance standard apply. The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document including any amendments applies. For the purposes of this document, the terms and definitions given in EN , EN , EN and the following apply. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? BS en PDF. Uploaded by Kaushik Sengupta. Did you find this document useful? Is this content inappropriate? Report this Document. Flag for inappropriate content.
Download now. Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. EN E Introduction The purpose of this European Standard is to establish certain basic requirements for production pressure testing of industrial valves in order to ensure uniform tests and test procedures.
EN E Scope This European Standard specifies requirements for tests, test procedures and acceptance criteria for production testing of industrial valves made of metallic materials. Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. Related searches Bs en En 1. Josip-Jenny Zrile. Prescriptions obligatoires Industriearmaturen. Turkey and United Kingdom. EN contains supplementary testing requirements for tests.
This European Standard shall be given the status of a national standard. The main changes compared to the previous edition are: a the scope was specified and editorially revised.
Turkey and the United Kingdom. This document supersedes EN EN EN E Introduction The purpose of this European Standard is to establish certain basic requirements for production pressure testing of industrial valves in order to ensure uniform tests and test procedures.
Tests and procedures given in this European Standard may also be used. Details should be included in the appropriate standard. Safety devices are not covered by EN Fill the upstream valve cavity with the test fluid.
Diaphragm valve 1. Fill the valve cavity with the test fluid. See NOTE 6. Butterfly valve 1. Test double disc butterfly valves either in both directions with the body vent plug removed, or test by introducing the test pressure between the discs via a shell tapping and measuring leakage either side of the disc.
Check valve 1. Fill the downstream valve cavity including, if appropriate, the cover cavity with the test fluid. NOTE 1 The procedure described may not ensure pressurization of the integrate space of double seated valves and may not therefore permit verification of the leakage rate of the downstream seat. When such pressurization is a requirement of the product or performance standard, or is required by the purchaser, it may be necessary to carry out step 3 before step 2.
NOTE 2 Valves which incorporate "double block and bleed" design feature have the bleed plug removed prior to the test in order to prove the "double block and bleed" capability. NOTE 3 Valves with independent double seating such as two-piece obturator or double-seated valves may be tested by applying the test pressure between the seats and checking each side of the closed valve. NOTE 4 Soft seated ball valves previously subjected to a liquid seat test pressure may have a reduced performance capability in some subsequent services at low differential pressures.
If a liquid seat test pressure is specified and is carried out before a low pressure gas seat test, it may be necessary to allow time for the seat material to recover.
NOTE 5 With plug valves relying on a sealing compound to effect a seal, it is possible to charge with sealing compound prior to testing. NOTE 6 Valves with symmetrical seating may be tested in either direction. Leakage rates are given in Table A. NOTE 2 "No visually detectable leakage" means no visible weeping or formation of drops or bubbles and is a lower leakage rate than Rate B.
Compliance with the clauses of this standard given in Table ZA. Table ZA. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision.
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