Cone bottom Tank applicable code
Cone bottom Tank applicable code
(OP)
Hi
WE found while hydrotest of two cone bottom tanks deformation of the skirt holding the cone bottom. The code API620 which is applicable to these tanks doesnt spell out clearly the acceptance limit of the skirt out of roundness.
API650 states the limits of the "out of roundness".
Comment on this issue whether API650 limitts will be applicable??
These tanks are atmospheric and desalter tanks
WE found while hydrotest of two cone bottom tanks deformation of the skirt holding the cone bottom. The code API620 which is applicable to these tanks doesnt spell out clearly the acceptance limit of the skirt out of roundness.
API650 states the limits of the "out of roundness".
Comment on this issue whether API650 limitts will be applicable??
These tanks are atmospheric and desalter tanks
RE: Cone bottom Tank applicable code
RE: Cone bottom Tank applicable code
RE: Cone bottom Tank applicable code
Of course it is good practice to build any tank within the roundness tolerances to reduce the deformation as described by JStephen.
If your skirt is round pre-hydro and goes out of round during hydro you have a problem.
RE: Cone bottom Tank applicable code
This tank atmospheric ,cone roof and bottom cone type supported by skirt and internal supporting structure. The incident happened during the hudrotest. As a preventive measure two stiffner rings welded on skirt externaly approximately 1.5 meters distance. Rehydrotested. that time the deformation noted again only above second stiffner ring and bottom cone to skirt welding.
Now I am looking for the code/ sections describing the tolerance levels of the deformations noted.
RE: Cone bottom Tank applicable code
Consider posting pictures or sketches showing details of the problem
What is the height of the shell ?