Vessel hydrotesting
Vessel hydrotesting
(OP)
Hi Members
We have a situation where the Stainless steel pressure vessel having internals and built to ASME Sec VIII div 1.
is required to be hydrotested ( test pressure -12 bar)with all the internals fitted. is there any precaution which needs to be taken apart from proper bolting of internals?
Are internals normally designed to take hydrotest loads?
Thanks in advance
sree60
We have a situation where the Stainless steel pressure vessel having internals and built to ASME Sec VIII div 1.
is required to be hydrotested ( test pressure -12 bar)with all the internals fitted. is there any precaution which needs to be taken apart from proper bolting of internals?
Are internals normally designed to take hydrotest loads?
Thanks in advance
sree60





RE: Vessel hydrotesting
If internals can stop bleeding of air off, can make a hydrotest hard to carry out.
what kind of internals??
RE: Vessel hydrotesting
RE: Vessel hydrotesting
hydrotest with internals is a good "proof test" as there could be some reactions at the attachment points of internals , espescially if teh internals span the full diameter of the vessel, and proof that pre-existing weld cracks will not fail during service would be provided by such a test.
RE: Vessel hydrotesting
jt
RE: Vessel hydrotesting
RE: Vessel hydrotesting
What type of internals? After hydrotest, do you have access to dry out the water in the vessel and on all the internals?
RE: Vessel hydrotesting
Not mentioned in the above post is the importance of using low chloride water for testing. I don't know the current line of thinking is but our requirements were less than 20 ppm Chloride..
RE: Vessel hydrotesting
Thanks for the generous inputs
The vessel is a flare KO drum ( dia 6 meters)and we have inlet vane diffusers as internals. We do have CFD report
( computational fluid dynamic )However we are checking with vessel internal designers to confirm if the internals are designed to take hydrostatic test loads .
The vessel expansion during hydrotest , requirement of water to be drained and dried, are valid points to be considered. Chloride content in water is meeting the requirements.
Sree 60
RE: Vessel hydrotesting
Cheers,
John