ASTM A131 structural shapes API Std 650 tanks
After using for a certain period of time, it is necessary to check the corrosion protection of the metal oil tank and paint the outer wall of the API Std 650 tanks with anti-corrosion paint. The inlet and outlet valves of API Std 650 tanks shall be inspected and maintained regularly to ensure they are in good condition. Oil tank will produce a lot of dirt when it is stored for a long time. Usually, the cleaning cycle of metal oil tank is about three to five years.
When the API Std 650 tanks top shell course is the minimum thickness indicated in 5.10.4, Table 5-6 and Figure 5-6, details a – e, h and i, the minimum anchorage shall be designed for normal loads as specified by the Purchaser and by this standard. See 5.11.2.3 for the allowable stress. When the top shell course is thickened beyond the minimum thickness provided in Table 5-6 or as in Figure 5-6, details f and g, or a knuckle is used, the minimum anchorage shall be designed for three times the internal design pressure. The allowable stress for this loading is 90% of the minimum specified yield strength of anchorage material.
There is a gap of 100 mm to 500 mm between the shell of API 650 crude oil storage API Std 650 tanks tank and the floating plate of external floating roof to ensure that there is no chuck during operation. Use API Std 650 tanks edge sealing system to reduce edge evaporation. The support legs of API 650 crude oil tank floating roof are usually movable and retractable and suspended in liquid.
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