API Std 650 cylindrical welded storage tanks erection requirements
The API 650 specification provides guidelines for the API Std 650 cylindrical welded storage tanks design, manufacturing, materials, installation and inspection of welded vertical and cylindrical tanks. Such containers must be on the ground and have a closed or open top.
Generally speaking, the duration of the "exhalation" of the API Std 650 cylindrical welded storage tanks is longer than that of the "inhalation" of the API Std 650 cylindrical welded storage tanks every day. There are many factors affecting the "small breathing" loss, mainly including the following points: the change of temperature difference between day and night, sunshine time of the API Std 650 cylindrical welded storage tanks location, open area of the API Std 650 cylindrical welded storage tanks, atmospheric pressure, filling degree of API Std 650 cylindrical welded storage tanks, etc. When the API Std 650 cylindrical welded storage tanks is full of gas, the space volume is small, and the "small breathing" loss is less; if the space volume is large, the loss is also large.
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 Std 650 cylindrical welded storage tanks used Piping, Tubing, and ForgingsMaterial 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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