ANSI B16.5 - 1968 edition HELP!
ANSI B16.5 - 1968 edition HELP!
(OP)
I am looking for someone who has the 1968 edition of B16.5 to let me know what requirements were included, if any, for valve closure or valve seat leakage hydrostatic testing. Would really appreciate a FAX of the applicable page(s). FAX is 205-992-5002. Thanks in advance.





RE: ANSI B16.5 - 1968 edition HELP!
ANSI B 16.5 is for pipe flanges and flanged fittings.
For testing of valves please refer API 598.
NRP
RE: ANSI B16.5 - 1968 edition HELP!
I have found a 1968 edition of B16.5 and am now looking for the addenda to it if anyone has them.
RE: ANSI B16.5 - 1968 edition HELP!
As part of the progression to bring better standarization (ANSI) of valves, 16.5-73 became the standard for flanged end valves and 16.34-73 was for buttwelding end valves. Both had seat test requirments, but left the closure tightness requirements to the user, although they did specify testing the seat at 1.1 100F rating. (This requirment and limitation is still in 16.34.) Hence the user could use SP-61 or API-598 mentioned above or whatever they wanted. I have seen specifications that invoked SP-61, but used 0.2 cc/hr per inch diameter. They were used for containment isolation valves at a nuclear plant where leakage needs to be optimally minimal.