API standard 650 aboveground steel oil storage tanks finish of plate edges
The most popular standards for API standard 650 aboveground steel oil storage tanks are API Std 650, JIS B8501, BS2654, GB50341, etc. The formulas used in each standard are derived from the hoop stress calculation formula of membrane theory. Combined with the stress characteristics of API standard 650 aboveground steel oil storage tanks, plus the allowable stress, weld coefficient and additional wall thickness, the wall thickness calculation formula is complete. The allowable stress and weld coefficient are determined according to the material performance characteristics and construction technology level of each country. According to different API standard 650 aboveground steel oil storage tanks standards, the calculation results of tank wall thickness are sometimes quite different.
Allowable compressive stresses shall be in accordance with 5.5.4 except that for aluminum alloy plate the allowable compressive stresses shall be reduced by the ratio of the modulus of compressive elasticity to 29,000 for values of (t – c)/R less than 0.0175 and by the ratio of the minimum yield strength for the aluminum alloy in question to 30,000 for values of (t – c)/R equal to or greater than 0.0175 (see 5.5.2 for definitions). In all other equations in this standard API standard 650 aboveground steel oil storage tanks where yield strength or modulus of elasticity is used, such as Equations 27 and 28, similar corrections shall be made for aluminum alloys.
Application scope of API 650 petroleum storage tank:1. API standard 650 aboveground steel oil storage tanks Working pressure: atmospheric storage tank;2. API 650 petroleum storage tank working temperature: -30℃～150℃;3. API 650 petroleum storage tank liquid medium: various oil products, including naphtha, gasoline, diesel, kerosene, crude oil, fuel oil, heavy oil, benzene, xylene, methanol, ethanol;4. API 650 petroleum storage tank volume: current design considerations generally do not exceed 10,000 cubic meters.
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