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**Standard approval announcement issued

2009-03-23View Original

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**Announcement No. 21 of 2008 issued by the Standardization Management Committee introduced a series of **standards, among which those related to valves are as follows: Serial Number Standard Code Standard Name Replaced Standard Implementation Date 1 GB/T 12238-2008 Flanged and butt-welded elastic-sealed butterfly valves GB/T 12238-1989 2009-07-01 2 GB/T 12239-2008 Industrial valves – Metal diaphragm valves GB/T 12239-1989 2009-07-01 3 GB/T 13927-2008 Industrial valves – Pressure testing GB/T 13927-1992 2009-07-01 4 GB/T 8464-2008 Threaded valves made of iron and copper GB/T 8464-1998; partially replaces GB/T 15185-1994 2009-07-01 5 GB/T 22652-2008 Process qualification for surfacing of valve sealing surfaces 2009-07-01 6 GB/T 22653-2008 Emergency shut-off valves for liquefied gas equipment 2009-07-01 7 GB/T 22654-2008 Technical requirements for steam traps 2009-07-01

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