A537 class 1 plates API Std 650 mechanically-anchored steel tanks
Compared with the fixed roof API 650 oil storage tank without API Std 650 mechanically-anchored steel tanks floating roof, there is no evaporation space. In principle, this eliminates the so-called "large breathing loss". Evaporation not only causes the loss of product quantity, but also affects the quality of API Std 650 mechanically-anchored steel tanks product and pollutes the environment.
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Allowable Design StressesThe maximum allowable design stresses for the API Std 650 mechanically-anchored steel 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.
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