Yes there was a procedure - including all of this - and yes it was followed. It was a case of this being the largest vessel we have built and putting too much trust in a an inexperienced Heat Treater.
Thanks for your helpful input guys. I agree that there were several factor contributing to the problem (heat, support, Burner location/control, TC placement). I'm just wondering - if there is sufficient creep at this temperature and since this is commonly done, how do others do it? Like you...
The vessel was only partially stress relieved. It was a 60' section that was internally fired through two radial manyways and fully insulated (one near the center of the 60' section, the other near the end). The distortion was in a 40' section between a head and a transition cone. The manyways...
This case was very similar to the one in Saudi Arabia (I only wish I would have seen the post before it happened to us!). We repaired it using four 200 ton jacks spaced apart, moving them along the vessel and making many jacking cycles with small displacements. This required an intricate setup...
We have just finished repairing a pressure vessel that was distorted due to PWHT. The direct cause of the distorition is not clear (support, overheat, or flame impingement problem) and I was wondering if there is a someone who has dealt with this (I'm sure there are a few) and what kind of...
