Valve Leak Test procedures (& Criteria)

[VinAAA]

I am reviewing leak test procedures for some of our XXV's.

However I have failed to find a simple procedure for a liquid valve which will allow testing at opportune shutdowns (duration typically 1 - 4 hrs).

I've obtained some leak criteria from API procedures (0.1 and 1 kg/s for corrective action - immediate replacement), but other guides, or the background for these numbers would also be useful.

 

[jsummerfield]

Look at the API firesafe valve tests and the MMS ball valve tests. You could look into the ASTM helium leak detection methods too.

John