Holding time for vessel hydro pressure test

[KevinNZ]

What is the required holding time for an ASME VIII vessel hydro pressure test? this information seens to be missing in the code.

Thanks
Kevin

 

[TGS4]

There is no minimum hold time. However, there are inspections that must be completed during the hold time - so that drives a certain minimum amount of time.

 

[metengr]

Because this is a process detail and must be addressed in your Quality Manual. In other words, work with your AIA to decide on a hold time to check for leaks.

 

[MJCronin]

The typical hold time is 0.5 to one hour.

But, of course it is controlled by the time necessary to conduct joint inspections.

More info here:

http://www.onetb.com/forum/hydrostatic-test-duration-to-ug-99-t2596.html

http://www.priorclavena.com/wbcntnt...aticTestingofPressureVessels_PriorclaveNA.pdf

http://syokellpefasme.blogspot.com/2009/11/on-hydrostatic-testing-heat-exchangers_14.html

 

[vesselfab]

we normally use 1 hour per inch of thickness with a 1 hour minimum.

but waiting for inspectors and AI it usually runs 5-6 hours.