ASTM A27 grade 415-205 floating roofs API 650 self-anchored tank

The vent pipe mouth should be 4m or more above the ground. The nominal diameter of the API 650 self-anchored tank API 650 petroleum storage tank vent pipe should be no less than 50mm and a flame arrestor should be installed.

For the welding of API 650 self-anchored tank bottom, attention should be paid to the slag removal and drying of the welding joint before welding, and there is no sediment and oil contamination in the lap joint of steel plate. The manufacturing quality and production efficiency of the central plate can be obviously improved by adopting the rolling central plate. The butt joint is used between the rolling plates to improve the installation conditions of the central plate at the bottom of the API 650 self-anchored tank. The welding sequence of the central plate is from the center of the central plate to the surrounding.

Structural shapes of 9% and 5% nickel steel may be furnished to the chemical and physical requirements of ASTM A353, A553, or A645. Physical tests shall be in accordance with the requirements of ASTM A6.
API 650 self-anchored tank used Piping, Tubing, and Forgings
Material used for piping, tubing, and forgings shall be compatible in welding strength, and thermal expansion coefficient with the tank shell material. In addition to the specific requirements of this appendix, all piping within the limitations of 1.3.2 shall fulfill the minimum requirements of ASME B31.3.

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