Safe use of 50 cubic LPG storage tanks

4) When there is corrosion on the inner and outer surfaces of the tank, multiple wall thickness measurements should be taken at the suspected parts. If the measured wall thickness is less than the designed minimum wall thickness, the strength should be re-evaluated and recommendations on whether it can continue to be used and the allowable working pressure should be made.

5) When there are defects such as decarburization, stress corrosion, intergranular corrosion and fatigue cracks on the inner wall of the tank, metallographic inspection and surface hardness measurement should be carried out, and an inspection report should be submitted.