ISO INTERNATIONAL. STANDARD. ISO. Third edition Details of the software products used to create this PDF file can be found. robinetterie métalliques. STANDARD. ISO. Fourth edition Permission can be requested from either ISO at the address below or ISO's. INTERNATIONAL ISO STANDARD Fourth edition Industrial valves — Pressure testing of metallic valves Robinetterie industrielle — Essais.
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ISO specifies examinations and tests that a valve manufacturer needs to act upon in order to establish the integrity of the pressure boundary of an. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the. SEATED VALVES ISO /API /API 6D/MSS SP/FCI TESTING & LEAKAGE RATES OVERVIEW. From an engineering point of view, almost all.
Soft seated valves such as ball valves must be zero leakage. The testing requirements differ slightly from API However, pipeline full port metal seated API 6D check valves do have a seat leakage allowance.
BS is more commonly used for check valves. Less frequently, the leakage performance for soft seated valves is referred to as Class VI, which is the tightest leakage under FCI , and generally applies to resilient seated control valves as opposed to metal seated control valves or soft seated shut off valves.
Class II. Intended for double-port or balanced single-port valves with a metal piston ring seal and metal-to-metal seats.
Allowable leakage is 0. Class III. Intended for the same type of valves as in Class II.
Allowable leakage is limited to 0. Class IV. Your basket is empty.
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