![]() Appendix E of API 650 addresses this aspect of design. California and Japan are seismically active areas, and the accelerations to which the tank may be subjected must be built into the tank at the design stage before construction. Storage Tanks may have to withstand seismic disturbances in the normal course of their service life. ![]() If you check Use PVP-1279, TANK uses an alternate method to compute the nozzle stiffnesses.When the tank temperature value in General Tank Data is changed, the software updates the Modulus of Elasticity and Expansion Coefficient values automatically.When you select API 650 as the API Design Code in General Tank Data, the software uses the data acquired from this dialog box to implement the rules of API 650, Appendix P.The data specification can include external piping loads from a pipe stress analysis, if available. Intergraph Tank Allows you to specify up to fifteen tank nozzles.Where nozzles are subjected to mechanical loadings and temperatures that differ from the shell temperature where differential expansion takes place, Tank will evaluate the stresses in the nozzle to shell junction.Storage Tank Nozzle Stiffness- Appendix P: ![]() So with the help of this parameter how we can evaluate the external pressure capacity of the tank. ![]() Here we provide minimum requirements for tanks that are designed to operate with external pressure (vacuum). Design of Storage Tanks for External Pressure– Appendix V ![]()
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