NGAllowable max Nat Gas velocity in pipelines, as a function of operating pressure (50 oC)Assumed temperatureoC50505050505050Operating pressureBarg75401510520.2Natural gas MWkg/kgmol20.4320.4320.4320.4320.4320.4320.43Gas compressibility factor (assumed)0.840.920.980.980.990.991.00Gas density (at operating conditions)kg/m368.633.912.58.64.62.30.9Allowable max gas velocityaErosional velocity, API 14E (1984)m/s14.720.934.641.756.780.3126.9bAs above, no corrosion/solid particlesm/s29.541.969.183.4113.4160.7253.7a'Allowable max gas velocity per am/s7.410.517.320.828.440.263.4b'Allowable max gas velocity per bm/s14.720.934.641.756.780.3126.9cPer Norsok standard P-001m/s28.438.459.260.060.060.060.0NOTESbnon corrosion service without solid particles, C=200 lb/s/ft2 per API 14E (1984).a'considered as 50% of erosional velocity per ab'considered as 50% of erosional velocity per b

NG

Series a'Series b'Series c (Norsok)Pressure, bargAllowable max velocity, m/s

CH4Allowable max CH4 (g) velocity in pipelines, as a function of operating pressure (15 oC)Assumed temperatureoC15151515151515Operating pressureBarg80401510520.2Natural gas MW (assumed 100% CH4)kg/kgmol16161616161616Gas compressibility factor0.850.920.980.980.990.991.00Gas density (at operating conditions)kg/m363.429.810.97.54.12.00.8Allowable max gas velocityaErosional velocity, API 14E (1984)m/s15.322.336.944.560.585.7135.4bAs above, no corrosion/solid particlesm/s30.644.773.889.0121.0171.5270.7a'Allowable max gas velocity per am/s7.711.218.422.230.342.967.7b'Allowable max gas velocity per bm/s15.322.336.944.560.585.7135.4cPer Norsok standard P-001m/s29.440.760.060.060.060.060.0NOTESbnon corrosion service without solid particles, C=200 lb/s/ft2 per API 14E (1984).a'considered as 50% of erosional velocity per ab'considered as 50% of erosional velocity per b

so that density will be 68.61 kg/m3, as given.Assumed same as that for CH4 at 15 oC.Assumed same as that for CH4 at 15 oC.Assumed same as that for CH4 at 15 oC.Assumed same as that for CH4 at 15 oC.Assumed same as that for CH4 at 15 oC.Assumed same as that for CH4 at 15 oC.

CH4

Series a'Series b'Series c (Norsok)Pressure, bargAllowable max velocity, m/s