1100 aluminum tube API Std 650 mechanically-anchored flat-bottom tanks

Before pressure testing, thoroughly flush the API 650 tank floating roof primary drain hose system. Supply API Std 650 mechanically-anchored flat-bottom tanks blind flanges, gaskets, and bolting (for other types of blanking covers as may be required) necessary for testing.

The head of API Std 650 mechanically-anchored flat-bottom tanks etc. vertical oil tank is the end cover on the top of vertical oil tank. It is used to separate the oil stored in the tank and the medium outside the tank, and also used to bear the pressure on the top of the vertical oil tank. The quality of the head is closely related to the long-term safety of the API Std 650 mechanically-anchored flat-bottom tanks. The head surface can be divided into convex shape, cone shape and flat shape according to its shape. The oil tank head can not be disassembled after welding.

The thickness of the API Std 650 mechanically-anchored flat-bottom tanks wall plate, t, required by 5.10.3 for the latitudinal unit forces, T2, acting at this level is 0.57 in. The nozzle neck is seamless steel pipe and conforms to ASTM A53, Grade A; the materials in the tank wall and reinforcing pad conform to ASTM A442 Grade 55. The main joints in the tank walls are fully radiographed, double-welded butt joints. The adequacy of the reinforcement and attachment welds shown in Figure F-7 shall be determined.
To determine the length of the nozzle neck within the limits of reinforcement, the smaller of the following calculated values shall be used:(2.5)(0.625) = 1.56 in.
(2.5)(0.375) + 0.75 = 1.69 in.

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