Alclad 3003 aluminum tube API Std 650 welded aluminum storage tanks
This API 650 tank standard is designed to provide industry with tanks of adequate safety and reasonable economy for use in the API Std 650 welded aluminum storage tanks storage of petroleum, petroleum products. and other liquid products.
According to the structure type of floating roof, floating roof API Std 650 welded aluminum storage tanks 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.
All API Std 650 welded aluminum storage tanks fillet welds shall consist of a minimum of two passes. The ends of the fillet welds shall be 2 in. from the rat hole, and these welds shall be deposited by starting 2 in. from the rat hole and welding away from the rat hole. An acceptable alternative to stopping fillet welds 2 in. short of the rat hole would be to weld continuously through the rat hole from one side of the stiffener to the opposite side. All craters in fillet welds shall be repaired by back welding.
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