API standard 650 vertical welded storage tanks seismic use group ii
Sand blasting and derusting of API standard 650 vertical welded storage tanks uses compressed air as power and SiC, pomegranate sand and quartz sand as spraying materials to form high-speed jet beam, which is used to remove rust and dirt on the surface of metal storage tank and improve the binding force of workpiece with coating and plating material. Sand blasting is often used in API standard 650 vertical welded storage tanks construction.
API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API standard 650 vertical welded storage tanks design metal temperatures no lower than the impact test temperature required by the ASTM specification for the applicable material grade without additional impact tests. For temperatures below those allowed by the ASTM specification, the following paragraph shall apply.
For floating roof API 650 tanks, the net working capacity is the liquid volume contained between the API standard 650 vertical welded storage tanks maximum operating level (300 mm below rim for metallic type seals and 600 mm below rim for fabric type seals) and the minimum operating level (API 650 tanks roof supports clearing the tank bottom by 25 mm while set at the operating position).
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