Total Shell Weight (including partition plates) (Corroded) St = Allowable Stress for Hydrostatic condition of Tank HL1 = Design Liquid LevelĬA = Corrosion Allowance Sd = Allowable Stress for Design Condition (Sd) (E) (St) (E) td = Design shell thickness, mm tt = Hydrostatic test shell thickness, mm G = Specific Gravity of Fluid to be Storedĭ = Nominal Dia. The required minimum thickness of shell plates shall be the greater of the values computed by the following formulas (As per Appendix S, clause S.3.2) Design Shell Thickness Modulus of Elasticity Design TemperatureĪs per chapter 3, clause 3.6.1.1, the shell thickness for tanks with nominal tank diameter less than 15 m shall not be less than 5 mm. (Nozzles, Insulation, Ladder & Partition Plates) Weight of Top Curb Angle Weight of Roof Attachments Nominal Tank Diameter = Di + Bottom Shell Thickness Material's Yield Strength Design TemperatureĪllowable Design Stress Design TemperatureĪllowable Hydrostatic Stress Ambient Temperature 4, 2005ĪPI STANDARD 650 TENTH EDITION, NOVEMBER 1998 ADDENDUM 4, DECEMBER 2005 APPENDICES: J, M & S 'Process Equipment Design'īy Lloyd E. TANK STABILITY AGAINST UPLIFT DUE TO INTERNAL PRESSUREĮVALUATION OF EXTERNAL LOADS ON TANK SHELL OPENINGS AS PER P.3 OF API 650, ADD. VERIFICATION OF UNSTIFFENED SHELL FOR EXTERNAL PRESSURE
