Material requirements for API Std 650 welded steel storage tanks

According to the structure type of floating roof, floating roof API Std 650 welded steel 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.

API 620 storage tanks relative standard for referenceASTM A106 Seamless Carbon Steel Pipe for High-Temperature ServiceASTM A131 Shipbuilding Structural Steel for API Std 650 welded steel storage tanksASTM A134 Welded Steel PipeASTM A182 Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature ServiceASTM A193 Alloy-Steel and Stainless Bolting MaterialsASTM A194 Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High-Temperature ServiceASTM A213 Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat Exchanger TubesASTM A240 Stainless Steel Plate, Sheet, and Strip for Pressure VesselsASTM A283 Low and Intermediate Tensile Strength Carbon Steel Plates

API 650 petroleum storage tanks are used for API Std 650 welded steel storage tanks storage. API 650 petroleum storage tanks can be made of carbon steel, austenitic stainless steel and nickel alloy (only for low temperature). Welding API Std 650 welded steel storage tanks certification is regulated by Section 10 of the American Society of Mechanical Engineers (ASME). For API 650 petroleum storage tanks, non-destructive inspections are required, but third-party inspections are not required.