dry air humidity when pneumatic test 2

[erkuts]

Hello,

What dry air humidity value must be before pneumatic test after hydrostatic test ? In which API, ASME standart i can look ?

Thanks,

 

[SnTMan]

erkuts, I doubt you will find any such specified. How much moisture can your vessel tolerate?

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[EdStainless]

I always took the route to calculate the min temp possible (from expansion) and then made sure that the air was dry enough to prevent condensation from forming.

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P.E. Metallurgy, Plymouth Tube