Leakage Acceptance Rates Comparison Metal & Soft Seated …

ADELAIDE BRISBANE PERTH. Leakage Acceptance Rates Comparison Metal & SOFT. Seated valves ISO 5208/API 598/API 6D/MSS SP-61/FCI 70-2. TESTING & Leakage Rates OVERVIEW. From an engineering point of view, almost all valves leak by some measure. valves may be said to be bubble tight' or zero Leakage ', but in actuality that is just a term that speci es the allowable Leakage of that classi cation. In the past many products were rated with Cold Working Pressure (CWP) ( 800 psi WOG which meant 800 psi working pressure for water, oil or gas service), instead of the ASME/ANSI pressure classes used today for most steel valves . Of course many commodity', low pressure screwed end valves up to 2000 psi are still produced in CWP WOG.

Valve type Common test standard Steel ball, gate, globe and check valves API 598/ ISO 5208 Steel ball, gate, globe and check valves BS 6755*, ISO 5208 (EN12266-1) Cast Iron gate valves API 598/ ISO 5208, MSS SP-70 Bronze gate, globe and check valves MSS SP-80 Steel gate, globe and check valves larger than NPS 24” ASME B16.34

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  Steel, Cast, Valves, Check, Gate, Globe, Steel gate

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