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Using jacks for reducing out-of-roundness

Using jacks for reducing out-of-roundness

Using jacks for reducing out-of-roundness

(OP)
Dear members,
Hope you are all well

What would happen if a contractor uses hydraulic jacks for reducing out-of-roundness and fit up circumferential weld joints under the pressure of jacks (shell to shell & shell to head joints)?

- Longitudinal weld of shells has been welded after rolling
-Maximum out-of-roundness is limited to 0.3% according to spec. Currently, out-of-roundness of shell is over 1.2% and contractor uses hydraulic jacks to fit up joints.

Literally, my concern is that the pressure vessel will be under cyclic pressure during service and service is hydrogen gas.
I would appreciate any reference in codes and standards related to this problem.

Appreciating your time and help,
Thanks and regards


RE: Using jacks for reducing out-of-roundness

No problem.

Regards

RE: Using jacks for reducing out-of-roundness

Done often. No real problem.

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