One of the diesel tanks in our factory is deformed; how can it be repaired?
Thread Content
Our factory’s diesel tanks are atmospheric pressure storage tanks, but a fuel supply line is connected to them for other purposes. When this line is not in use, it is purged with nitrogen at 0.7 MPa. During this purging process, the diesel tanks deformed and leaks occurred. Please suggest ways to repair these tanks. A bottom layer was formed at the bottom of the oil tank.
Vertical or horizontal, what are the structural parameters?
Vertical type, 200 cubic meters, material is Q235C, wall thickness 6mm, bottom plate thickness 10mm, diameter 6600mm, height 7088mm
This post was last edited by SDHZZXM on 2017-10-25 at 16:10. Blowing with 0.7MPa nitrogen is likely to have caused the diesel tank to deform due to internal pressure, resulting in a leak. I don’t understand what it means that “a bottom like that of a pot has formed at the bottom of the oil tank” It is recommended to upload a picture so that everyone can offer some suggestions...
The design pressure of atmospheric storage tanks is only a slight positive pressure, meaning they can withstand very little pressure; using a pressure of 0.7 MPa for purging will definitely lead to problems. The fact that the bottom of the can has been blown into a ball indicates that the manufacturing quality is quite good. As for repair, it depends on the specific situation; the deformation is certainly not limited to the bottom of the tank.
Yes, current inspections have shown deformation on the top of the tank as well; it’s planned to carry out repairs. The deformation at the bottom of the tank caused all the oil to leak out
It is estimated that the original bottom plate was a flat cover, which became a head after being under pressure. . . Reverse-check the stress on the cylinder. .
These are photos from the scene; it has changed from a flat bottom to a pot bottom
Determine whether the tank bottom needs to be replaced based on the degree of deformation and the diameter of the tank.
I was wondering how everyone uploads photos; I can’t do it