Td =td / tt = 2.6(D)(H-1)/(St) = td = Miniumum shell thickness =ĭ = Normal tank diameter, in feet H = depth of tank, in feet G = design Specific gravity of liquid Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress 516-60 Hydro Test CA = Corrosion Allowance Td =td / tt = 2.6(D)(H-1)/(St) td = Miniumum shell thickness, in inches D = Normal tank diameter, in feet H = depth of tank, in feet G = design Specific gravity of liquid Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress 516-60 Hydro TestįileName: 58389297.xls WorkSheet: Steel DesignĪPI 650 Design Calculations Shell Design : td = 2.6(D)(H -1)(G)/Sd= Td =td / tt = 2.6(D)(H-1)/(St) = td = Miniumum shell thickness, in inches =ĭ = Normal tank diameter, in feet = H = depth of tank, in feet = G = design Specific gravity of liquid = Sd = allowable Stress for Design condition E = joint efficiency St = allowable stress516-60 Hydro Test DATA GIVEN: Seismic Zone Zone Coefficient Importance Factor Diameter of Tank Height of Liquid Content (Design) Shell Height Design Specific Gravity Td =td / tt = 2.6(D)(H-1)/(St) td = Miniumum shell thickness, in inchesĪnnular Bottom Plate Thickness D = Diameter in Feet H = Height in Feet V = Volume in Cubic FeetįOUNDATION DESIGN: Per API 650 (Appendix E) Tank is unanchored, use equations pertaining to unanchored tanks, for seismic loading.
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