Buckled Areas Around Tank Inlet
Buckled Areas Around Tank Inlet
(OP)
Pls. help with solutions or ideas to recover buckled areas on a tank.
We have atmospheric storage tank, 46 feet Diameter X 48 feet high. The tank consisted of 6 courses. The tank 24” inlet, located on course No. 3, was subjected to external force which resulted in buckled areas around the inlet. The bucked areas vary from 0.2” to 1.4” on one side of the inlet and 0.4” to 1.6” on the other side.
We did completely fill the tank with water hoping that the static force will externally push the buckled areas out and return the tank to its original condition. Unfortunately, tank hydrotesting helped a little.
Pls. help with ideas to recover these buckled areas. Many thanks
We have atmospheric storage tank, 46 feet Diameter X 48 feet high. The tank consisted of 6 courses. The tank 24” inlet, located on course No. 3, was subjected to external force which resulted in buckled areas around the inlet. The bucked areas vary from 0.2” to 1.4” on one side of the inlet and 0.4” to 1.6” on the other side.
We did completely fill the tank with water hoping that the static force will externally push the buckled areas out and return the tank to its original condition. Unfortunately, tank hydrotesting helped a little.
Pls. help with ideas to recover these buckled areas. Many thanks





RE: Buckled Areas Around Tank Inlet
RE: Buckled Areas Around Tank Inlet
What about hammering the internal side (inside the tank) of the buckled areas so that they come back to their orignal positions
or Do you think pulling out the inlet nozzel could help?
Again many thanks
RE: Buckled Areas Around Tank Inlet
If you have access to the inside there is sveral possibilities to recover.
The buckling maybe ironed out.
It might be able to be dogged or jacked out.
It might also be able to recover with flame straightened.
RE: Buckled Areas Around Tank Inlet
trying to move metal back into place once it is stretched can be very tricky and can finish ruining the integrity of the metal
RE: Buckled Areas Around Tank Inlet
If I apply forces to move the metal back into place, is there a way or test to make sure that the metal integrity is not runied?
again thanks all!
RE: Buckled Areas Around Tank Inlet
1-determine the amount of external force
2-make proper design calculation of shell thickness
3-replace nozzle 24" with new one with thickness according to design calculation
rhg
RE: Buckled Areas Around Tank Inlet
The storage tank is / should be a major asset for you and your company and is not a tin of diced tomatoes, to push out the warped side with your thumb.. The buckled area has gone beyond the yield of the steel and is probably now work hardened. There is very little chance of "hammering it out" and increased likelyhood of loosing completely the strength of the plate. Even if you would somehow force the plate to yield in the opposite direction, the surface cracks will render your tank useless.
As above, don't waste time; -replace the nozzle and the plate around it with 10 mm plate or thicker if the inlet piping will continue to impinge on the nozzle.
gr2vessels
RE: Buckled Areas Around Tank Inlet
I agree to replace the nozzle and plate around it with a new one based on proper design calculations.
Again Thanks
RE: Buckled Areas Around Tank Inlet
A star for clear headed thinking. I've never been a fan of heating and beating on tanks or vessels. The tomato can analogy is excellent.
Joe Tank
RE: Buckled Areas Around Tank Inlet
The affected area as posted is very small and should be able to be address without a tank modification. The material in the tank should be unaffected by tugging, hammering or heating as anyone that has been around tank construction could attest to. Every tanker I know has an 8# maul and plenty of dogs, clips, bull pins, chainfalls along with a torch or two.