Pipeng Toolbox : ASME B31.3 Process Piping Shedule Calculators Blank User
Short Cuts
GO
Main ±
Beams ±
References ±
Fluid Flow ±
Fluid Properties ±
Maths ±
Materials ±
Pipelines ±
Soils ±
Subsea ±
Demo

ASME B31.3 Process Piping Line Pipe Schedule

Calculate ASME B31.3 process piping schedule for metal and plastic piping.

The piping minimum wall thickness and hoop stress wall thickness schedule can be calculated from the nominal wall thickness, fabrication tolerance and corrosion allowance.

`tm = tn - fa `
`tm = (1 - fx) tn `
`t = tm - c `

where :

tn = nominal wall thickness
tm = minimum wall thickness
t = hoop stress wall thickness
c = corrosion thickness allowance
fa = negative fabrication thickness allowance
fx = negative fabrication fraction

The minimum wall thickness equals the nominal wall thickness minus the fabrication allowance. The pressure containment wall thickness equals the nominal wall thickness minus the fabrication tolerance, and minus the corrosion allowance. Fabrication tolerance can be defined by either a fabrication allowance, or a fabrication fraction. The pipe diameter can be defined by either the outside diameter or the inside diameter. Use the Result Table option to display a table of pipe dimensions versus wall thickness, wall tolerance, or piping diameter for metal pipes, or pipe dimension versus wall thickness for plastic pipes.

Calculate metal piping maximum and minimum diameter schedule. Use the Result Table option to display a table of pipe dimensions versus wall thickness, wall tolerance, or piping diameter.

Calculate piping unit mass and joint mass schedule for metal and plastic piping. Use the Result Table option to display a table of pipe dimensions and mass versus wall thickness.

Calculate piping tensile stress, yield stress and allowable schedule for metal piping. Use the Result Table option to display a table of stress versus material type.

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).

Reference : ANSI/ASME B31.3 : Process Piping (2018)

Change Module :

[FREE] tools are free in basic mode with no login (no plots, tables, goal seek etc). Login or Open a free account to use the tools in plus mode (with plots, tables, goal seek etc).
[PLUS] tools are free in basic CHECK mode with Login or Open a free account (CHECK values no plots, tables, goal seek etc). Buy a Subscription to use the tools in plus mode (with plots, tables, goal seek etc).
Try plus mode using the Plus Mode Demo tools with no login.   Help Using The Pipeng Toolbox (opens in the popup workbook)

Links : ±
CALCULATOR : ASME B31.3 Metal Pipe Diameter And Wall Thickness Schedule [FREE]   ±

Calculate ASME B31.3 metal pipe diameter, minimum wall thickness and pressure design thickness from pipe schedule or user defined diameter and wall thickness (ASME B31.3 section 304.1).

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 nominal wall thickness, minimum wall thickness and pressure design wall thickness 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
  • ttoltype : Wall Thickness Fabrication Tolerance Type
    • txu : User Defined Negative Wall Thickness Fraction
    • tfu : User Defined Negative Wall Thickness Allowance
  • c : Wall Thickness Corrosion Allowance

Tool Output

  • ID : Nominal Inside Diameter
  • OD : Nominal Outside Diameter
  • OD/tn : Diameter Over Wall Thickness Ratio
  • tf : Wall Thickness Fabrication Allowance
  • tm : Minimum Wall Thickness
  • tn : Nominal Wall Thickness
  • tp : Pressure Design Wall Thickness
  • tx : Wall Thickness Fabrication Fraction
CALCULATOR : ASME B31.3 Plastic Pipe Diameter And Wall Thickness Schedule [FREE]   ±

Calculate ASME B31.3 plastic pipe diameter, minimum wall thickness and pressure design thickness from pipe schedule or user defined diameter and either wall thickness or dimension ratio (SDR or SIDR) (ASME B31.3 section 304.1).

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 nominal wall thickness, minimum wall thickness and pressure design wall thickness for the selected diameter. The dimension ratio is calculated from the pressure design thickness (nominal wall thickness minus fabrication allowance and mechanical allowance).

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
  • c : Wall Thickness Mechanical Allowance

Tool Output

  • CVG : Convergence Factor
  • DR : Pipe Dimension Ratio (SDR Or SIDR)
  • ID : Nominal Inside Diameter
  • OD : Nominal Outside Diameter
  • tf : Wall Thickness Fabrication Allowance
  • tm : Minimum Wall Thickness
  • tn : Nominal Wall Thickness
  • tp : Pressure Design Wall Thickness
CALCULATOR : ASME B31.3 Table A-1 Low Pressure Metal Pipe Yield Stress Tensile Stress And Basic Allowable Stress Schedule [FREE]   ±

Calculate low pressure metal pipe SMYS (Specified Minimum Yield Stress), SMTS (Specified Minimum Tensile Stress) and basic allowable stress schedule (ASME B31.3 table A-1).

Use the Result Table option to display the stress values for the selected stress schedule (click the Result Table button, and then click the make table button).

Tool Input

  • syutype : Stress Schedule Type
  • mattype : Material Type
    • SMTSu : User Defined Specified Minimum Tensile Stress
    • SMYSu : User Defined Specified Minimum Yield Stress
    • Su : User Defined Basic Allowable Stress

Tool Output

  • S : Basic Allowable Stress
  • S/SMTS : Basic Allowable Stress Over SMTS Ratio
  • S/SMYS : Basic Allowable Stress Over SMYS Ratio
  • SMTS : Specified Minimum Tensile Stress
  • SMTS/SMYS : SMTS Over SMYS Ratio
  • SMYS : Specified Minimum Yield Stress
  • SMYS/SMTS : SMYS Over SMTS Ratio
CALCULATOR : ASME B31.3 Table K-1 High Pressure Metal Pipe Yield Stress Tensile Stress And Allowable Stress Schedule [FREE]   ±

Calculate high pressure metal pipe SMYS (Specified Minimum Yield Stress), SMTS (Specified Minimum Tensile Stress) and allowable stress schedule (ASME B31.3 table K-1).

Use the Result Table option to display the stress values for the selected stress schedule (click the Result Table button, and then click the make table button).

Tool Input

  • syutype : Stress Schedule Type
  • mattype : Material Type
    • SMTSu : User Defined Specified Minimum Tensile Stress
    • SMYSu : User Defined Specified Minimum Yield Stress
    • Su : User Defined Allowable Stress

Tool Output

  • S : Basic Allowable Stress
  • S/SMTS : Basic Allowable Stress Over SMTS Ratio
  • S/SMYS : Basic Allowable Stress Over SMYS Ratio
  • SMTS : Specified Minimum Tensile Stress
  • SMTS/SMYS : SMTS Over SMYS Ratio
  • SMYS : Specified Minimum Yield Stress
  • SMYS/SMTS : SMYS Over SMTS Ratio
CALCULATOR : ASME B31.3 Metal Pipe Maximum And Minimum Diameter Schedule [FREE]   ±

Calculate ASME B31.3 metal pipe maximum and minimum diameter from diameter tolerance.

Select the pipe schedule type, diameter, wall thickness and diameter tolerance, or use the user defined option. The maximum diameter is required for high pressure metal pipe calculations.

Use the Result Table option to display a table of the diameter and diameter tolerance versus either wall thickness type, diameter tolerance type, or diameter type.

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
  • dtoltype : Diameter Fabrication Tolerance Type
    • dxu : User Defined Diameter Fraction
    • dfu : User Defined Diameter Allowance
  • ddtype : Diameter Type

Tool Output

  • ID : Nominal Inside Diameter
  • ID* : Inside Diameter With Tolerance
  • OD : Nominal Outside Diameter
  • OD* : Outside Diameter With Tolerance
  • OD*/tn : Diameter Over Wall Thickness Ratio
  • df : Diameter Fabrication Allowance
  • dx : Diameter Fabrication Fraction
  • tn : Nominal Wall Thickness
CALCULATOR : ASME B31.3 Metal Pipe Mass Per Length And Total Mass Schedule [FREE]   ±

Calculate ASME B31.3 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 B31.3 Plastic Pipe Mass Per Length And Total Mass Schedule [FREE]   ±

Calculate ASME B31.3 plastic pipe unit mass and total mass from pipe schedule or user defined pipe diameter and either wall thickness or dimension ratio.

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. The dimension ratio (SDR or SIDR) is calculated from the pressure design thickness (nominal wall thickness minus fabrication allowance and mechanical allowance).

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 B31.3 Pipe Unit Mass And Unit Weight Schedule (Multi Layer Pipe) [FREE]   ±

Calculate ASME B31.3 process piping mass per length and weight per length (dry empty, dry full, wet empty and wet full) for multi layer pipelines.

Change the number of layers on the setup page. The external fluid density is not required for dry pipelines.

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
pipeng.com 2025 (698 μs : 7 ms : 0.745 MB) Pengu CMS ©