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60 cubic liquefied petroleum gas underground storage tank piping, tubing, and forgings

60 cubic liquefied petroleum gas underground storage tank piping, tubing, and forgings

60 cubic liquefied petroleum gas underground storage tank piping, tubing, and forgings

The normal operation of 60 cubic liquefied petroleum gas underground storage tank includes receiving oil, storing oil, sending oil and measuring oil. The correct use and operation of oil storage tank is directly related to the production safety and oil loss of oil tank. In order to use and operate the 60 cubic liquefied petroleum gas underground storage tank correctly, it is necessary to be familiar with and master the structure and performance of the 60 cubic liquefied petroleum gas underground storage tank and its accessories, such as the maximum storage capacity of the oil tank, the pressure range that can bear and the safety fabrication specification.

In this project, an area of tank wall is constructed of ASTM A285, Grade C, steel plate that is 5/8-in. thick and has spot-radiographed, double-welded butt joints. The wall is subject to tension in a meridional direction and to compression in a latitudinal direction. The values of R1 and R2 at the point under consideration are 75 in. and 300 in. respectively. A corrosion allowance of 1/16 in. is required. The computed (meridional) tensile stress, stc, in the net thickness after deduction of the corrosion allowance is 6000 lbf/in.2.
The problem in this example is to find the maximum allowable (latitudinal) compressive stress value for the given conditions, in conformance with the provisions of API 620 tank standard 5.5.4.5.

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