CSA G40.21 Gr 50WT plates API 650 unanchored liquid-storage tanks
Welded steel API 650 unanchored liquid-storage tanks storage tanks that are designed, manufactured and installed on the ground are classified according to the API standard system. The three API standards API 650 unanchored liquid-storage tanks all adopt on-site production and installation of storage tanks.
In the petrochemical industry and other industries, large vertical API 650 unanchored liquid-storage tanks are often used to store various production raw materials. Usually, the medium with high melting point and easy to crystallize at room temperature can be exported and used after heating, which involves the heating of large vertical storage tanks. The heating system is an auxiliary facility for heating of large vertical storage tank. It is often necessary to design external heating coil or internal heating coil system.
API 650 unanchored liquid-storage tanks Visual InspectionUpon completion of all the foregoing tests, the pressure in the tank shall be released and a thorough visual inspection shall be made of both the inside and outside of the tank, giving particular attention to all internal ties, braces, trusses, and their attachments to the walls of the tank. Anchors shall be checked for snug tightness and adjusted if required. Anchor threads shall be fouled by peening or tack welding to prevent loosening. In lieu of thread fouling, double nuts may be used.Rate of Water Filling and Water TemperatureThe rate at which water is introduced into a tank for a hydrostatic test shall not exceed 3 ft of depth per hour. The foundation, venting equipment, or other conditions may limit the water filling to a lower rate. Pressure shall not be applied above the surface of the water before the tank and its contents are at about the same temperature.
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