API standard 650 unanchored liquid-storage tanks roof load
In API 650 oil storage tank, when the mixing ratio of combustible medium and air reaches a certain limit, it is easy to cause explosion. Therefore, it is necessary to add API standard 650 unanchored liquid-storage tanks external floating roof to open cylindrical steel API standard 650 unanchored liquid-storage tanks tank. At present, the external floating roof is most suitable for large-scale API 650 oil storage tank in China, ranging from 20000, 30000, 50000 cubic meters to 100000 cubic meters.
In this project, a cylindrical tank 62 ft 6 in. in diameter is designed for an internal pressure of 4 lbf/in.2 gauge in the vapor space. The plate material is ASTM A131 steel with appropriate grades for different plate thicknesses in accordance with Table 4-1 for a design metal temperature less than 65°F but not less than 25°F. No corrosion allowance is required for any portion of the tank. The top course of the butt-welded cylindrical sidewall is 1/4 in. thick. The roof is a single lap-welded spherical dome with an internal radius of 50 ft and a thickness of 1/4 in. The maximum design liquid level is 6 in. below the plane of the juncture of the tank API standard 650 unanchored liquid-storage tanks roof and sidewall.
During heavy rain, closely observe the change of the water level in the storage area of the API standard 650 unanchored liquid-storage tanks. If the water level rises to the dangerous range, drain the water immediately. There are more thunderstorms in heavy rain, and lightning protection devices should be installed in the API standard 650 unanchored liquid-storage tanks area to avoid lightning accidents. Observe the groundwater level of the API standard 650 unanchored liquid-storage tanks area at any time, clean and dredge the drainage ditch in time to ensure unobstructed drainage, and prevent the bottom of the API standard 650 unanchored liquid-storage tanks from leaking and rusting due to untimely drainage.
Group consciousness is an important psychological factor for the formation of enterprise internal cohesion. The formation of API standard 650 unanchored liquid-storage tanks enterprise group consciousness makes every employee of the enterprise regard their work and behavior as an integral part of the realization of enterprise goals, make them feel proud of themselves as a member of the enterprise, have a sense of honor for the achievements of the enterprise, and thus regard the API standard 650 unanchored liquid-storage tanks enterprise as the community and belonging of their own interests.
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