API 620 polyethylene storage tank pipe, tubing, forgings, and bolting
API 620 polyethylene storage tank pipe, tubing, forgings, and bolting
For open top and fixed roof API 650 tanks, the net working capacity is the liquid volume contained between the minimum operating level (top of API 650 tanks API 620 polyethylene storage tank outlet connection) and the maximum operating level [limited to the bottom of overflow connection, 75 mm below foam chamber connection, or 150 mm below rim, whichever is greater.
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The specifications used in the design of large oil tanks, API 620 polyethylene storage tank mainly include American Petroleum Institute Standard API 650, Japanese Industrial Standard JIS B8501, British Industrial Standard BS2654 and Chinese National Standard GB50341 from a global perspective. The formulas used in each specification are based on the hoop stress in the membrane theory. Each specification is based on the performance characteristics of materials and the construction technology level of their respective countries to determine the allowable stresses and weld coefficients. Therefore, the calculation results of tank wall thickness of API 620 polyethylene storage tank with the same volume are sometimes quite different according to different specifications.
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