API standard 650 horizontal tank plates

API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API standard 650 horizontal tank 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.

The internal floating plate of internal floating roof tank of API 650 tank is different from that of open floating plate of API standard 650 horizontal tank External floating roof tank of API 650 tank, so it is impossible to have rain and snow load.

According to the structure type of floating roof, floating roof API standard 650 horizontal tank can be divided into internal floating roof tank and external floating roof storage tank. The internal floating roof tank is a floating roof tank with tank roof. The top is the combination of dome roof and floating roof, the external is dome roof, and the internal is floating roof. There is no vault on the top of the external floating roof tank, only a top plate floating with the storage liquid. The common feature of the inner floating roof tank and the outer floating roof tank is that both of them can reduce the evaporation loss of the storage liquid.