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AS 2885.1 Pipeline Hydrotest Pressure

Calculate AS 2885.1 pipeline test pressure and hoop stress check.

The required test pressure at the test point (the location where the test pressure is measured) is calculated from the local test pressure. The maximum test point pressure corresponds to the highest point on the pipeline. A test point pressure should be selected which is greater than or equal to the maximum calculated test point pressure, and the maximum hoop stress checked. For dry pipelines, the maximum hoop stress occurs at the lowest point on the pipeline. For wet pipeline sections, the maximum hoop stress occurs in the submerged section. Use the Result Plot option to plot the required test pressure versus elevation, or the hoop stress versus elevation for the selected test pressure. Hoop stress is calculated using Barlow's formula.

For the case where the local internal pressure is assumed to be equal to the maximum operating pressure at all points on the pipeline, use the user defined local pressure option, and set the internal pressure equal to the maximum operating pressure. This option is more onerous.

Note : A simplified check can be performed by calculating the maximum delta elevation from the maximum and minimum test pressure.

Reference : Australian Standard AS 2885.1 : Pipelines - Gas And Liquid Petroleum Part 1 : Design And Construction (2015)

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CALCULATOR : AS 2885.1 Section 4.5.5 Pipeline Test Pressure And Hoop Stress Check (Dry) [PLUS]   ±

Calculate pipeline test pressure and hoop stress check for dry pipelines (AS 2885.1 section 4.5.5).

The local test pressure should be greater than or equal to the minimum local test pressure at all points on the pipeline section. Additional analysis is required if the local test pressure is greater than the mill test pressure, or than the local test pressure from a previous pressure test, or if the local hoop stress is greater than the yield stress. In some cases the pipe wall thickness will be determined by the pressure test requirements.

For dry pipelines with internal fluid of lower density than the test fluid, the maximum test point pressure is required for the highest point on the pipeline. The maximum hoop stress occurs at the lowest point on the pipeline.

Tool Input

  • plitype : Internal Pressure Type
    • Priu : User Defined Reference Internal Pressure
    • Pliu : User Defined Local Internal Pressure
  • 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
  • ttoltype : Fabrication Tolerance Type
    • xu : User Defined Negative Wall Thickness Fraction
    • Hu : User Defined Negative Wall Thickness Allowance
  • syutype : Line Pipe Stress Type
  • mattype : Material Type
    • SMYSu : User Defined Specified Minimum Yield Stress
  • satype : Allowable Stress Type
    • Fdu : User Defined Allowable Stress Factor
    • Sau : User Defined Allowable Stress
  • tfactype : Test Pressure Factor Type
    • Ftpu : User Defined Test Pressure Factor
    • Ftpeu : User Defined Equivalent Test Pressure Factor
  • loctype : Location Class
    • Pltu : User Defined Local Test Pressure
    • Pttu : User Defined Test Point Test Pressure
  • G : Corrosion Allowance
  • ρi : Internal Fluid Density
  • ρt : Test Fluid Density
  • Zr : Reference Elevation
  • Zl : Local Elevation
  • Zt : Test Point Elevation

Tool Output

  • D/tn : Pipe Diameter Over Wall Thickness Ratio
  • Fd : Allowable Stress Factor
  • Ftpe : Equivalent Test Pressure Factor
  • H : Wall Thickness Fabrication Allowance
  • ID : Pipe Inside Diameter
  • OD : Pipe Outside Diameter
  • Pli : Local Internal Pressure
  • Plt : Local Test Pressure
  • Plt/Pli : Local Test Pressure Over Operating Pressure Ratio
  • Pltmin : Minimum Required Local Test Pressure
  • Ptt : Test Point Test Pressure
  • SMYS : Specified Minimum Yield Stress
  • Sa : Allowable Stress
  • Sh : Hoop Stress
  • Sh/Sa : Hoop Stress Ratio
  • tm : Minimum Fabrication Wall Thickness
  • tn : Pipe Nominal Wall Thickness
  • tp : Pipe Pressure Design Wall Thickness
  • x : Wall Thickness Fabrication Fraction
CALCULATOR : AS 2885.1 Section 4.5.5 Pipeline Test Pressure And Hoop Stress Check (Submerged) [PLUS]   ±

Calculate pipeline test pressure and hoop stress check for wet or submerged pipelines (AS 2885.1 section 4.5.5).

The local test pressure should be greater than or equal to the minimum local test pressure at all points on the pipeline section. Additional analysis is required if the local test pressure is greater than the mill test pressure, or than the local test pressure from a previous pressure test, or if the local hoop stress is greater than the yield stress. In some cases the pipe wall thickness will be determined by the pressure test requirements.

For wet pipelines with internal fluid of lower density than the test fluid, the maximum test point pressure is required for the highest point on the pipeline. If the test fluid density is equal to the external fluid density, the hoop stress is constant (and maximum) in the submerged section of the pipeline.

Tool Input

  • plitype : Internal Pressure Type
    • Priu : User Defined Reference Internal Pressure
    • Pliu : User Defined Local Internal Pressure
  • pletype : External Pressure Type
    • Pleu : User Defined Local External Pressure
  • 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
  • ttoltype : Fabrication Tolerance Type
    • xu : User Defined Negative Wall Thickness Fraction
    • Hu : User Defined Negative Wall Thickness Allowance
  • syutype : Line Pipe Stress Type
  • mattype : Material Type
    • SMYSu : User Defined Specified Minimum Yield Stress
  • satype : Allowable Stress Type
    • Fdu : User Defined Allowable Stress Factor
    • Sau : User Defined Allowable Stress
  • tfactype : Test Pressure Factor Type
    • Ftpu : User Defined Test Pressure Factor
    • Ftpeu : User Defined Equivalent Test Pressure Factor
  • loctype : Location Class
    • Pltu : User Defined Local Test Pressure
    • Pttu : User Defined Test Point Test Pressure
  • G : Corrosion Allowance
  • ρe : External Fluid Density
  • ρi : Internal Fluid Density
  • ρt : Test Fluid Density
  • Zr : Reference Elevation
  • Zl : Local Elevation
  • Zs : Surface Elevation
  • Zt : Test Point Elevation

Tool Output

  • D/tn : Pipe Diameter Over Wall Thickness Ratio
  • Fd : Allowable Stress Factor
  • Ftpe : Equivalent Test Pressure Factor
  • H : Wall Thickness Fabrication Allowance
  • ID : Pipe Inside Diameter
  • OD : Pipe Outside Diameter
  • Pld : Local Test Delta Pressure
  • Ple : Local External Pressure
  • Pli : Local Internal Pressure
  • Plt : Local Test Pressure
  • Plt/Pli : Local Test Pressure Over Operating Pressure Ratio
  • Pltmin : Minimum Required Local Test Pressure
  • Ptt : Test Point Test Pressure
  • SMYS : Specified Minimum Yield Stress
  • Sa : Allowable Stress
  • Sh : Hoop Stress
  • Sh/Sa : Hoop Stress Ratio
  • tm : Minimum Fabrication Wall Thickness
  • tn : Pipe Nominal Wall Thickness
  • tp : Pipe Pressure Design Wall Thickness
  • wd : Water Depth
  • x : Wall Thickness Fabrication Fraction
CALCULATOR : AS 2885.1 Pipeline Hydrotest Liquid Volume And Dose Rate [FREE]   ±

Calculate AS 2885.1 pipeline hydrotest liquid volume and dose rate.

The dose rate can be calculated from the dose volume fraction, the dose mass fraction, the dose volume ratio, or the dose mass ratio. The average fluid density includes the dose chemical. The dose volume can be calculated for the liquid phase, the total fluid (including dose chemical), or the pipeline length.

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
  • dosetype : Dosage Type
    • Xvu : User Defined Dose Volume Fraction
    • Xmu : User Defined Dose Mass Fraction
    • Rvu : User Defined 200
    • Rmu : User Defined 250
  • voltype : Fluid Volume Type
    • Vlu : User Defined Liquid Volume
    • Mlu : User Defined Liquid Mass
    • Vfu : User Defined Total Fluid Volume
    • Mfu : User Defined Total Fluid Mass
    • Lu : User Defined Pipeline Length
  • ρl : Liquid Density
  • ρd : Dose Chemical Density

Tool Output

  • ρf : Fluid Average Density
  • ID : Inside Diameter
  • L : Pipe Length
  • Md : Dose Mass
  • Mf : Total Fluid Mass
  • Ml : Liquid Mass
  • Rm : Dose Mass Ratio
  • Rv : Dose Volume Ratio
  • Vd : Dose Volume
  • Vf : Total Fluid Volume
  • Vl : Liquid Volume
  • Xm : Dose Mass Fraction
  • Xv : Dose Volume Fraction
CALCULATOR : AS 2885.1 Pipeline Leak Test Gas Volume And Dose Rate [FREE]   ±

Calculate AS 2885.1 pipeline leak test gas volume and dose rate .

The dose rate can be calculated from dose volume fraction, dose mass fraction or dose gas ratio. The average fluid density includes the dose chemical. The dose volume can be calculated for the gas phase, the total fluid (including dose chemical), or the pipeline length.

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
  • dosetype : Dose Rate Type
    • Xvu : User Defined Dose Volume Fraction
    • Xmu : User Defined Dose Mass Fraction
    • Rvu : User Defined Dose Volume Over Gas Moles Ratio
    • Rmu : User Defined Dose Mass Over Gas Moles Ratio
  • voltype : Fluid Volume Type
    • Vgu : User Defined Gas Volume
    • Mgu : User Defined Gas Mass
    • Ngu : User Defined Gas Moles
    • Vfu : User Defined Total Fluid Volume
    • Mfu : User Defined Total Fluid Mass
    • Lu : User Defined Pipeline Length
  • ρd : Dose Chemical Density
  • P : Fluid Pressure
  • T : Fluid Temperature
  • Z : Gas Compressibility Factor
  • SG : Gas Specific Gravity

Tool Output

  • ρf : Fluid Average Density
  • ρg : Gas Density (At T P)
  • ID : Inside Diameter
  • L : Pipe Length
  • Md : Dose Mass
  • Mf : Total Fluid Mass
  • Mg : Gas Mass
  • Ng : Gas Moles
  • Rm : Dose Mass Over Gas Moles Ratio
  • Rv : Dose Volume Over Gas Moles Ratio
  • Vd : Dose Volume
  • Vf : Total Fluid Volume
  • Vg : Gas Volume
  • Xm : Dose Mass Fraction
  • Xv : Dose Volume Fraction
  • vg : Gas Mole Volume (At T P)
CALCULATOR : AS 2885.1 Pipe Test Pressure And Hoop Stress Check (General) [FREE]   ±

Calculate AS 2885.1 general pipe test pressure and hoop stress check from operating pressure, diameter, wall thickness and design stress.

Test pressure should be determined in accordance with section 4.5.4. For AS 2885.1 pipe, select the Barlow's equation outside diameter option. For onshore pipelines set the external pressure to zero. The manufacturing tolerance is normally ignored except for cases where the tolerance exceeds the relevant specification (eg some seamless pipe). 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
  • 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
  • schdtype : Pipe Schedule Type
  • diamtype : Pipe Diameter Type
    • ODu : User Defined Outside Diameter
    • IDu : User Defined Inside Diameter
  • sdtype : Design Stress Type (F x SMYS)
    • Fu : User Defined Design Factor
    • Sdu : User Defined Design Stress
  • walltype : Hoop Stress Wall Thickness Type
    • Yu : User Defined ASME Y Factor
  • hooptype : Hoop Stress Wall Thickness Type
  • testtype : Test Pressure Type
    • Tu : User Defined Test Factor
    • Ptu : User Defined Test Pressure
  • tc : Corrosion Allowance
  • Pi : Operating Pressure

Tool Output

  • ID : Pipe Inside Diameter
  • OD : Pipe Outside Diameter
  • OD/tn : Pipe Diameter Over Wall Thickness Ratio
  • Pe : External Pressure
  • Pt : Test Pressure
  • PtΔ : Test Pressure Difference
  • SMYS : Specified Minimum Yield Stress
  • Sd : Design Stress
  • Sh : Hoop Stress
  • Sh/SMYS : Hoop Stress Over Yield Stress Ratio
  • T : Test Pressure Factor
  • tf : Fabrication Allowance
  • tfx : Fabrication Fraction
  • th : Hoop Stress Thickness (Pressure Containment)
  • tm : Minimum Wall Thickness
  • tn : Nominal Wall Thickness

CALCULATOR : AS 2885.1 Section 5.4.3 Pipeline Allowable Stress [FREE]   ±

Calculate pipeline allowable stress from specified minimum yield stress (SMYS) and design factor (AS 2885.1 section 5.4.3).

Use the Result Table option to display a table of SMYS and allowable stress versus material grade for the selected material schedule.

Tool Input

  • syutype : Line Pipe Stress Type
  • mattype : Material Type
    • SMYSu : User Defined Specified Minimum Yield Stress
  • dfactype : Allowable Stress Factor Type
    • Fdu : User Defined Allowable Stress Factor

Tool Output

  • Fd : Allowable Stress Factor
  • SMYS : Yield Stress
  • Sa : Allowable Stress
CALCULATOR : AS 2885.1 Pipeline Diameter And Wall Thickness Schedule [FREE]   ±

Calculate AS 2885.1 pipeline diameter and wall thickness.

The pressure design wall thickness is equal to the nominal wall thickness minus the corrosion allowance. The fabrication allowance is accounted for in the design factor (an additional fabrication allowance is required in some cases). Select the pipe schedule (NPS or ISO etc), 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
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