Gas Pipeline Line Pack

Calculate single phase gas pipeline line pack from base pressure and line pack pressure.

For gas storage the line pack pressure is higher than the base pressure (delta gas moles are positive). For gas output the line pack pressure is lower than the base pressure (delta gas moles are negative). The gas temperature and compressibility factor are assumed constant.

The standard units for gas moles are kilogram moles [kgmol]. Change units on the setup page (eg to SCF or SCM).

Tool Input

• schdtype : Pipe Schedule Type
• diamtype : Pipe Diameter Type
  • ODu : User Defined Outside Diameter
  • IDu : User Defined Inside Diameter
• wtntype : Wall Thickness Type
  • tnu : User Defined Wall Thickness
• fluidtype : Fluid Property Type
  • SGu : User Defined Gas Specific Gravity
• flowtype : Pressure For Fluid Property Calculation
• Pb : Base Gas Pressure
• Pp : Line Pack Gas Pressure
• T : Gas Temperature
• Z : Gas Compressibility Factor
• L : Pipeline Length

Tool Output

• ρ : Gas Density (At Pf)
• ID : Inside Diameter
• MΔ : Delta Gas Mass
• Mb : Base Gas Mass
• Mp : Line Pack Gas Mass
• NΔ : Delta Gas Moles
• Nb : Base Gas Moles
• Np : Line Pack Gas Moles
• PΔ : Delta Pressure
• Pf : Pressure For Fluid Property Calculation
• SG : Gas Specific Gravity
• V : Pipeline Volume
• vg : Gas Mole Volume (At Pf)