Calculations Process / flow (natural gas) Required HP for Natural Gas Compression Gas Flow / Pressure Drop Convert Standard Flow to Actual Flow Convert Actual Vol. to Standard Vol. Mol Wt. SG HHV LHV Blowdown Example Pressure vessel calculations Pressure Vessel Calculation B31.8 Wall Thickness B31.3 Wall Thickness If you would like to see a calculation related to natural gas pipelines or compressor stations added to this site, please use the contact link below to send your request. Contact