UG-99 of VIII-1 does not specify a minimum hold time for hydrostatic
test pressure. It all depends on the time needed to fully inspect the
vessel to ensure no leaks are present.
You have to also check the client specifications; they often specify
minimum hydrotest duration. For vessels I recommend 1 hour stabilization
at maximum pressure.
Regards
Somesh
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Nick
Sent: January 31, 2009 3:17 PM
To: Materials & Welding
Subject: [MW:1485] HYDRO TEST OF VESSELS
Does ASME define the HOLD time required for holding pressure during
HYDROTESTING of vessels?
If yes does change in vessel length affect the HOLD time?
Regards
Rushabh C. Kapadia
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