EN S275J0 plates API 650 larger diameter tanks

The effect of air pressure on the API 650 larger diameter tanks tank walls of the API 650 tank must be considered when the design pressure is greater than 2 kPa.The fixed point method can be used to design the tank wall of atmospheric or micro internal pressure API 650 larger diameter tanks storage tank.

In order to prevent the deformation of the bottom of metal vertical storage tank, API 650 larger diameter tanks during welding, the number of welders should be reasonably distributed. When welding metal vertical API 650 larger diameter tanks, personnel and welding position shall be reasonably allocated according to the actual situation of welding personnel, and random welding is not allowed.

The inner and outer tanks may be decoupled for seismic design of the tank and anchorage and assumed to act independently. However, if the inner and outer tanks API 650 larger diameter tanks are supported by a common foundation, the seismic foundation loading shall be calculated using the lesser response modification values for either the inner tank or outer tank for both tanks and a dynamic analysis shall be performed to determine the combined effect.
Allowable Stresses: For Appendix R tanks, design allowable stresses shall be per API 620 large low pressure storage tank, Section R.3.3.

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