Pneumatic testing (Cryogenic)

[GemmellG]

Currently working on a LNG piping installation the pipe service is Cryogenic design MDMT is -321F. Materials are SA312-TP316L. Client has requested the completed lines be Pneumatic tested due to moisture concerns. Code is ASME B31.3. Can anyone recommend a minimum metal & test medium (Nitrogen) test temperature.

 

[mk3223]

My experience of the piping pneumatic test was to use the test fluid and metal temperature around 40F to 120F, which is not less than 30F above the pipe MDMT.

 

[metengr]

All of the information is present in 345.5 Pneumatic Leak Test.

 

[DekDee]

Again, as I have noted previously, there are too many lazy and/or unqualified people on this forum wanting someone else to do their work.
Are you seriously going to pneumatically test pipework based on what someone has told you on the internet ?

Before you pneumatically test anything you should be submitting a testing procedure to your client for review and acceptance.
Look a bit stupid if you put under references -

http://www.eng-tips.com

?