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DNVGL ST F101 Submarine Pipeline Design Pressure And Burst Pressure

Calculate DNVGL-ST-F101 submarine pipeline maximum allowable design pressure and burst pressure from the pressure design wall thickness (nominal wall thickness minus fabrication allowance and corrosion allowance).

For platform piping the allowable pressure is the maximum allowable local incidental pressure. For subsea pipelines the allowable pressure is the maximum allowable local pressure difference (local incidental pressure minus local external pressure). Use the Result Table option to display the results for the selected pipe schedule and pipe diameter.

Reference : DNVGL-ST-F101 : Submarine Pipeline Systems (Download from the DNVGL website)

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CALCULATOR : DNVGL ST F101 Subsea Pipeline Design Pressure (General) [FREE]   ±

Calculate DNVGL-ST-F101 subsea pipeline general design pressure from diameter, wall thickness, wall thickness tolerance and design stress).

The hoop stress is equal to the design stress at the design pressure. The maximum design internal pressure includes the effect of external pressure (for subsea sections only). For DNVGL-ST-F101 subsea pipelines use the Barlows thin wall equation for mid wall diameter option. Wall thickness tolerance can be defined by either a fraction tolerance, or an allowance tolerance. All tolerances should be positive. The corrosion allowance should include mechanical allowance (eg threads), erosion allowance and any other allowances.

Tool Input

  • pletype : External Pressure Type
    • Peu : User Defined External Pressure
  • 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
  • ttoltype : Wall Thickness Tolerance Type
    • xfu : User Defined Negative Wall Thickness Fraction
    • tfu : User Defined Negative Wall Thickness Allowance
  • syutype : Stress Table Type
  • mattype : Yield Stress Type
    • SMYSu : User Defined Specified Minimum Yield Stress
  • sdtype : Design Stress Type (F x SMYS)
    • Fu : User Defined Design Factor
    • Sdu : User Defined Design Stress
  • walltype : Hoop Stress Calculation Type
    • Yu : User Defined ASME Y Factor
  • tc : Corrosion Allowance

Tool Output

  • ID : Pipe Inside Diameter
  • OD : Pipe Outside Diameter
  • OD/tn : Pipe Diameter Over Wall Thickness Ratio
  • Pd : Design Internal Pressure
  • PdΔ : Design Delta Pressure
  • Pe : External Pressure
  • SMYS : Specified Minimum Yield Stress
  • Sd : Design Stress
  • tf : Fabrication Allowance
  • tfx : Fabrication Fraction
  • th : Hoop Stress Thickness (Pressure Containment)
  • tm : Minimum Wall Thickness
  • tn : Nominal Wall Thickness
CALCULATOR : DNVGL ST F101 Section 5.3.3 Subsea Pipeline Derated Yield Stress And Tensile Stress From Temperature [FREE]   ±

Calculate subsea pipeline temperature derating stress from temperature (DNVGL-ST-F101 section 5.3.3 Figure 5-2).

The derating stress is valid for temperatures up to 200 degrees C. For temperatures above 200 C material tests should be performed. For low temperature pipelines fracture toughness should also be considered.

Use the Result Table option to display a table of derated yield stress versus material type at the design temperature. Use the Result Plot option to display a plot of derated yield stress versus temperature for duplex stainless 22Cr 25Cr, and carbon manganese steel 13Cr curves.

Tool Input

  • syutype : Stress Table Type
  • mattype : Material Strength Type
    • SMYSu : User Defined Specified Minimum Yield Stress
    • SMTSu : User Defined Specified Minimum Tensile Stress
  • syttype : Temperature Derating Type
    • fytu : User Defined Yield Stress Temperature Derating
    • futu : User Defined Ultimate Stress Temperature Derating
  • autype : Material Strength Factor Type
  • Td : Design Temperature

Tool Output

  • αu : Material Strength Factor
  • SMTS : Specified Minimum Tensile Stress
  • SMYS : Specified Minimum Yield Stress
  • fcb : Burst Stress
  • fu : Tensile Stress
  • fut : Temperature Derating Tensile Stress
  • fy : Yield Stress
  • fyt : Temperature Derating Yield Stress
CALCULATOR : DNVGL ST F101 Section 5.4.2 Subsea Pipeline Burst Pressure And Maximum Design Pressure [PLUS]   ±

Calculate subsea pipeline burst pressure and design pressure from wall thickness (DNVGL-ST-F101 section 5.4.2).

The hoop stress is equal to the design stress at the design pressure. The design pressure is calculated from wall thickness t1. Use the Result Table option to display a table of design pressure versus wall thickness for the selected pipe schedule and diameter.

Tool Input

  • syutype : Stress Table Type
  • mattype : Material Strength Type
    • SMYSu : User Defined Specified Minimum Yield Stress
    • SMTSu : User Defined Specified Minimum Tensile Stress
  • syttype : Temperature Derating Type
    • Td : Design Temperature
    • fytu : User Defined Yield Stress Temperature Derating
    • futu : User Defined Ultimate Stress Temperature Derating
  • autype : Material Strength Factor Type
  • 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
  • ttoltype : Wall Thickness Tolerance Type
    • xfu : User Defined Negative Wall Thickness Fraction
    • tfu : User Defined Negative Wall Thickness Allowance
  • gsctype : Safety Class Resistance Factor Type
    • γscu : User Defined Safety Class Resistance Factor
  • ta : Corrosion Allowance

Tool Output

  • αu : Material Strength Factor
  • γm : Material Resistance Factor
  • γsc : Safety Class Resistance Factor
  • ID : Pipe Nominal Inside Diameter
  • OD : Pipe Nominal Outside Diameter
  • OD/tn : Pipe Diameter Over Wall Thickness Ratio
  • PR : Pipe Rated Pressure
  • Pb : Pipe Burst Pressure
  • SMTS : Specified Minimum Tensile Stress
  • SMYS : Specified Minimum Yield Stress
  • fca : Allowable Hoop Stress
  • fcb : Burst Stress
  • fu : Ultimate Stress
  • fut : Ultimate Derating Stress
  • fy : Yield Stress
  • fyt : Yield Derating Stress
  • t : Pipe Pressure Design Wall Thickness
  • tf : Fabrication Allowance
  • tfx : Fabrication Fraction
  • tm : Pipe Minimum Wall Thickness
  • tn : Pipe Nominal Wall Thickness
CALCULATOR : DNVGL ST F101 Subsea Pipeline Diameter And Wall Thickness Schedule [FREE]   ±

Calculate DNVGL-ST-F101 subsea pipeline diameter and pressure design wall thickness from pipe schedule.

The pressure design thickness equals the nominal wall thickness minus the corrosion allowance and fabrication allowance. The minimum wall thickness equals the nominal wall thickness minus the fabrication allowance. The corrosion allowance includes mechanical allowances such as threads and damage etc. Use the Result Table option display a table of pressure design wall thickness versus wall thickness for the selected diameter schedule.

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
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