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Seismic Minimum Thickness per API 650 Section

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FranklinCY

Petroleum
Joined
Aug 26, 2022
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2
Location
PE
Dear All,
Please help me with the following query:

Is the following equation valid? It is being compared:

ts = ((S_T+ * (t - CA)) / Membrane_Stress) + CA

Where:
Membrane_Stress = Maximum Allowable Hoop Tension Membrane Stress per API 650 Section E.6.2.4 (MPa)
S_T+ = Total Combined Hoop Stress per API 650 Section E.6.1.4 (MPa)
t = Installed Thickness (mm)
CA = Corrosion allowance per API-650 5.3.2 (mm))

I found this analysis in a calculation memory, where the thickness in the cylinder is being calculated by means of the previously shown equation

I will appreciate your comments.

Regards.
 
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