Pipeng Toolbox : ASME B31.4 Ripple Defect Calculators Login
Short Cuts
GO
Main ±
Beams ±
References ±
Fluid Flow ±
Fluid Properties ±
Maths ±
Materials ±
Pipelines ±
Soils ±
Subsea ±
Data ±
Units ±
Help ±
Demo

ASME B31.4 Liquid Pipeline Ripple Defect

Calculate ASME B31.4 oil and liquid pipeline allowable ripple defects from hoop stress for onshore and offshore pipelines.

Reference : ANSI/ASME B31.4 : Pipeline Transportation Systems For Liquids And Slurries (2012)

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 B31.4 Pipeline Diameter And Wall Thickness Schedule [FREE]   ±

Calculate ASME B31.4 oil pipeline diameter and pressure design wall thickness from pipe schedule or user defined diameter and wall thickness (ASME B31.4 section 403.2). For ASME B31.4 the pressure design thickness equals the nominal wall thickness minus the corrosion allowance (the fabrication tolerance is included in the design factor and is ignored).

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 and pressure design wall thickness 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 : Wall Thickness Type
    • tnu : User Defined Wall Thickness
  • c : Wall Thickness Corrosion Allowance

Tool Output

  • ID : Nominal Inside Diameter
  • OD : Nominal Outside Diameter
  • OD/tn : Diameter Over Wall Thickness Ratio
  • tn : Nominal Wall Thickness
  • tp : Pressure Design Wall Thickness
CALCULATOR : ASME B31.4 Section 451.6 Pipeline Allowable Ripple Height From Hoop Stress (Onshore) [FREE]   ±

Calculate onshore pipeline maximum allowable ripple height from hoop stress at the maximum operating pressure (ASME B31.4 section 451.6.2.8).

The hoop stress is calculated using Barlow's formula. The mid wall option (Dm), should only be used for offshore pipelines. The hoop stress may be calculated from either the nominal wall thickness, or the pressure containment wall thickness (nominal wall thickness minus the corrosion allowance).

Tool Input

  • schdtype : Line 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
  • plitype : Internal Pressure Type
    • Priu : User Defined Reference Internal Pressure
    • Pliu : User Defined Local Internal Pressure
    • ρf : Internal Fluid Density
    • Zr : Reference Elevation
    • Zl : Local Elevation
  • walltype : Hoop Stress Wall Thickness Type
  • ta : Corrosion Allowance

Tool Output

  • ID : Pipe Inside Diameter
  • OD : Pipe Outside Diameter
  • OD/tn : Pipe Diameter Over Wall Thickness Ratio
  • Pli : Internal Fluid Pressure
  • Sh : Hoop Stress
  • h/D : Maximum Ripple Height Over Diameter Ratio
  • hmax : Maximum Allowable Ripple Height
  • t* : Wall Thickness For Hoop Stress Calculation
  • th : Pipe Pressure Containment Wall Thickness
  • tn : Pipe Nominal Wall Thickness

CALCULATOR : ASME B31.4 Section 451.6 Pipeline Allowable Ripple Height From Hoop Stress (Offshore) [FREE]   ±

Calculate offshore pipeline maximum allowable ripple height from hoop stress at the maximum operating pressure (ASME B31.4 section 451.6.2.8).

The hoop stress is calculated using Barlow's formula. The mid wall option (Dm), should only be used for offshore pipelines. The hoop stress may be calculated from either the nominal wall thickness, or the pressure containment wall thickness (nominal wall thickness minus the corrosion allowance). For platform piping select the no external pressure option.

Tool Input

  • schdtype : Line 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
  • plitype : Internal Pressure Type
    • Priu : User Defined Reference Internal Pressure
    • Pliu : User Defined Local Internal Pressure
    • ρf : Internal Fluid Density
    • Zr : Reference Elevation
    • Zl : Local Elevation
  • pletype : External Pressure Type
    • Pleu : User Defined Local External Pressure
    • ρe : External Fluid Density
    • Zs : Surface Elevation
  • calctype : Hoop Stress Calculation Type
  • walltype : Hoop Stress Wall Thickness Type
  • ta : Corrosion Allowance

Tool Output

  • ΔPl : Delta Pressure Across Pipe Wall
  • ID : Pipe Inside Diameter
  • OD : Pipe Outside Diameter
  • OD/tn : Pipe Diameter Over Wall Thickness Ratio
  • Ple : External Fluid Pressure
  • Pli : Internal Fluid Pressure
  • Sh : Hoop Stress
  • h/D : Maximum Ripple Height Over Diameter Ratio
  • hmax : Maximum Allowable Ripple Height
  • t* : Wall Thickness For Hoop Stress Calculation
  • th : Pipe Pressure Containment Wall Thickness
  • tn : Pipe Nominal Wall Thickness

CALCULATOR : ASME B31.4 Section 403.2 Pipeline Allowable Stress (Onshore) [FREE]   ±

Calculate allowable stress (SEF) for onshore pipelines (ASME B31.4 section 403.2).

The allowable stress equals the specified minimum yield stress (SMYS) times the weld quality factor (E) times the design stress factor (F). SEF = SMYS x E x F. Use the Result Table option to display the results for the selected stress table (API, ASME or DNV).

Tool Input

  • syutype : Line Pipe Stress Type
  • mattype : Material Type
    • SMYSu : User Defined Specified Minimum Yield Stress
  • efactype : Weld Joint Quality Factor Type
    • Eu : User Defined Quality Factor
  • loctype : Location Class
    • Fu : User Defined Stress Factor

Tool Output

  • E : Weld Joint Factor
  • F : Design Stress Factor
  • SEF : Allowable Stress
  • SMYS : Specified Minimum Yield Stress
CALCULATOR : ASME B31.4 Section A402.3 Pipeline Allowable Stress (Offshore) [FREE]   ±

Calculate allowable stress (SF) for offshore pipelines (ASME B31.4 section A402.3).

The allowable stress equals the specified minimum yield stress (SMYS) times the design stress factor (F). SF = SMYS x F. Use the Result Table option to display the results for the selected stress table (API, ASME or DNV). For offshore pipelines, line pipe with a weld quality factor (E) = 1 should be used.

Tool Input

  • syutype : Line Pipe Stress Type
  • mattype : Material Type
    • SMYSu : User Defined Specified Minimum Yield Stress
  • loctype : Location Class
    • Fu : User Defined Design Stress Factor

Tool Output

  • F : Design Stress Factor
  • SF : Allowable Stress
  • SMYS : Yield Stress
pipeng.com 2025 (631 μs : 6 ms : 0.749 MB) Pengu CMS ©