Raulradin
Industrial
- Aug 30, 2022
- 3
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
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
