API standard 650 aboveground steel oil storage tanks flush-stacked on the inside

X-ray inspection is mainly applicable to the internal inspection of pressure bearing parts and materials of metal oil tanks such as API standard 650 aboveground steel oil storage tanks. It can clearly find the blocky defects inside the welded joints. However, the cost and resource consumption of radiographic testing are large. Magnetic particle testing can effectively detect the surface and near surface defects of API standard 650 aboveground steel oil storage tanks etc. metal oil tanks, but magnetic particle testing can not effectively identify the internal defects of oil tanks.

Allowable Design Stresses
The maximum allowable design stresses for the API standard 650 aboveground steel oil storage tanks materials outlined in Q.2.1 shall be in accordance with Table Q-3.The values for the allowable design tensile stress given in Table Q-3 for materials other than bolting steel are the lesser of (a) 331/3% of the specified minimum ultimate tensile strength for the material or (b) 662/3% of the specified minimum yield strength, but they are 75% of the specified minimum yield strength for the stainless steel, nickel alloy, and aluminum materials. Allowable test stresses are based on the limitation of API 620 oil tank storage standard Q.8.1.3.

Determination of API 650 oil tank container: The total volume should be determined according to factors such as transportation mode and API standard 650 aboveground steel oil storage tanks fuel supply cycle. For train and ship transportation, the maximum consumption is not less than 20-30 days; the maximum consumption for automobile transportation is not less than 5-10 days.

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