Following link is link of a new calculator of this site which calculates minimum required wall thickness for a offshore gas pipeline based on requirements of ASME B31.8.
It calculates minimum required wall thickness against internal pressure based on maximum hoop stress in the pipeline. So, longitudinal and combined stresses due to axial loads and bending moments shall be checked separately.
Besides, It uses the formulas of BS8010 to calculate minimum required thickness of the pipeline against buckle propagation and external pressure collapse.
Since this a the beta revision of the calculator, please check the calculated results by yourself. Beside, I appreciate your comments regarding this calculator.
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