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ASME B31.8 Gas Pipeline Mass And Weight

Calculate ASME B31.8 gas pipeline unit mass (mass per length), unit weight (weight per length), and total mass for metal and plastic pipe.

The mass per joint can be calculated from the joint length. Construction quantities can be calculated from the total pipe length. Pipe mass and pipe unit weight (weight per length) can be calculated for multi layer pipelines (dry empty, dry full, wet empty and wet full pipelines). For multi layer pipelines, the first internal layer is the line pipe. Change the number of layers on the setup page. The line pipe diameter and thickness are calculated from the pipe schedule.

Plastic pipe wall thickness can be defined by wall thickness or diameter ratio (DR or IDR). Select standard diameter ratios from the plastic pipe schedule (SDR or SIDR), or use user defined diameter ratios (DR or IDR). Plastic pipe is generally only used in low pressure distribution systems.

Use the Result Table option to display a table of pipe mass versus schedule wall thickness for the selected diameter.

Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems (2018)

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CALCULATOR : ASME B31.8 Metal Pipe Mass Per Length And Total Mass Schedule [FREE]   ±

Calculate ASME B31.8 metal pipe unit mass and total mass from pipe schedule or user defined pipe diameter and wall thickness.

Select the pipe schedule (NPS or ISO), pipe diameter and wall thickness, or use the user defined option. Use the Result Table option to display the pipe schedule with unit mass and total mass for the selected diameter.

Tool Input

  • schdtype : Schedule Type
  • diamtype : Diameter Type
    • ODu : User Defined Outside Diameter
    • IDu : User Defined Inside Diameter
  • wtntype : Wall Thickness Type
    • tnu : User Defined Wall Thickness
  • modptype : Material Property Type
    • ρpu : User Defined Pipe Density
  • L : Pipe Length

Tool Output

  • ρp : Pipe Density
  • ID : Nominal Inside Diameter
  • M : Pipe Total Mass
  • OD : Nominal Outside Diameter
  • OD/tn : Diameter Over Wall Thickness Ratio
  • m : Pipe Mass Per Length
  • tn : Nominal Wall Thickness
CALCULATOR : ASME B31.8 Plastic Pipe Mass Per Length And Total Mass Schedule [FREE]   ±

Calculate ASME B31.8 plastic pipe unit mass and total mass from pipe schedule or user defined pipe diameter and wall thickness.

Select the pipe schedule (NPS or ISO), pipe diameter and wall thickness, or use the user defined option. Use the Result Table option to display the results for the selected diameter.

Tool Input

  • schdtype : Schedule Type
  • diamtype : Diameter Type
    • ODu : User Defined Outside Diameter
    • IDu : User Defined Inside Diameter
  • wtntype : Wall Thickness Type
    • tnu : User Defined Wall Thickness
    • DRu : User Defined Dimension Ratio SDR OR SIDR
  • ttoltype : Wall Thickness Fabrication Tolerance Type
    • xfu : User Defined Negative Wall Thickness Fraction
    • tfu : User Defined Negative Wall Thickness Allowance
  • modptype : Material Property Type
    • ρpu : User Defined Pipe Density
  • c : Wall Thickness Mechanical Allowance
  • L : Pipe Length

Tool Output

  • ρp : Pipe Density
  • CVG : Convergence Factor
  • DR : Pipe Dimension Ratio (SDR Or SIDR)
  • ID : Nominal Inside Diameter
  • M : Pipe Total Mass
  • OD : Nominal Outside Diameter
  • m : Pipe Mass Per Length
  • tf : Wall Thickness Fabrication Allowance
  • tm : Minimum Wall Thickness
  • tn : Nominal Wall Thickness
  • tp : Pressure Design Wall Thickness

CALCULATOR : ASME B31.8 Pipe Unit Mass And Unit Weight Including Contents And Buoyancy (Multi Layer Pipe) [FREE]   ±

Calculate ASME B31.8 gas pipeline unit mass and unit weight including contents and buoyancy for multi layer pipelines. Select either dry empty, dry full, wet empty, or wet full to calculate unit weight.

Select the pipe schedule (NPS or ISO), pipe diameter and wall thickness, or use the user defined option. The line pipe is the first inside layer. The line pipe wall thickness is either taken from the selected schedule value, or the user input wall thickness is used if the user defined wall thickness option is selected. Details for each layer are displayed in the output view at the bottom of the page. Use the Result Table option to display the results for the selected diameter.

Tool Input

  • schdtype : Line Pipe Schedule Type
  • diamtype : Line Pipe Diameter Type
    • ODu : User Defined Outside Diameter
    • IDu : User Defined Inside Diameter
  • wtntype : Line Pipe Wall Thickness Type
    • tnu : User Defined Wall Thickness
  • wltype : Pipe Weight Type
  • WTi : Pipe Liner Wall Thickness
  • ρi : Pipe And Liner Density
  • WTo : Pipe Coating Wall Thickness
  • ρo : Pipe Coating Density
  • ρf : Contents Fluid Density
  • ρb : Displaced Fluid Density

Tool Output

  • IID : Pipe Inner Diameter Including Liners
  • OD : Line Pipe Nominal Diameter
  • OOD : Pipe Outer Diameter Including Coatings
  • SG : Pipe Specific Gravity Relative To Displaced Fluid
  • mb : Displaced Fluid Mass Per Length
  • mc : Contents Fluid Mass Per Length
  • mi : Inner Layers Total Unit Mass
  • mo : Outer Layers Total Unit Mass
  • mp : Pipe Mass Per Length Including Liner And Coating
  • tn : Line Pipe Nominal Wall Thickness
  • w : Pipe Total Weight Per Length Including Contents and Buoyancy
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