API 650 mechanically-anchored flat-bottom tanks welding electrodes

The foundation design of the API 650 mechanically-anchored flat-bottom tanks should meet the requirements of foundation stability and deformation, that is, the API 650 mechanically-anchored flat-bottom tanks foundation should not be crushed and the uneven settlement value of the foundation should be within the allowable range. The uneven settlement of the storage tank foundation should be specified in the design process of the safe allowable range, because excessive uneven settlement will reduce the safety of the API 650 mechanically-anchored flat-bottom tanks and cause distortion and deformation of the tank wall and bottom plate.

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The increased uplift described in API Standard 620 tank Appendix Q is intended to apply to the size of the ringwall and foundation but not the anchorage. For tanks with an internal design pressure of 1 lbf/in.2 gauge and over, the uplift, if any, shall be calculated under the combined conditions of 1.25 times the internal design condition plus the design wind load on the API 650 mechanically-anchored flat-bottom tanks shell and roof.

Similarities between API 650 and API 620 tanks Both tanks are used for storage purposes. Both API 620 and API 650 containers API 650 mechanically-anchored flat-bottom tanks can be made of carbon steel, austenitic stainless steel and nickel alloy (only for low temperature).