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ASME B31.4 Oil Pipeline Calculations

The ASME B31.4 liquid pipeline calculator module includes calculation tools for :

•   pipeline wall thickness
•   pipeline hoop stress
•   pipeline test pressure
•   flexibility check
•   pipeline axial load
•   allowable ripple height
•   branch reinforcement

See also ASME B31.4 Stress Intensity Factor Calculators

For more calculators refer to :

•   ASME B31.4 Oil Pipeline Calculators
•   ASME B31.4 Wall Thickness Calculators
•   ASME B31.4 Hoop Stress Calculators
•   ASME B31.4 Test Pressure Calculators
•   ASME B31.4 Stress Intensity Factor Calculators

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

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CALCULATOR : ASME B31.4 Section 402.3 Pipeline Hoop Stress Check From Operating Pressure (Onshore)   Show/Hide

Calculate onshore pipeline hoop stress from operating pressure (ASME B31.4 section 402.3). Pipeline pressure should account for variations in elevation and fluid desnsity.

CALCULATOR : ASME B31.4 Section 403.2 Pipeline Wall Thickness From Operating Pressure (Onshore)   Show/Hide

Calculate onshore pipeline wall thickness from operating pressure (ASME B31.4 section 403.2). Pipeline pressure should account for variations in elevation and fluid density.

CALCULATOR : ASME B31.4 Section 403.9 Pipeline Maximum Displacement Flexibility Check   Show/Hide

Calculate pipe spool flexibility maximum displacement check (ASME B31.1 section 119.7, ASME B31.3 section 319.4, ASME B31.4 section 403.9, and ASME B31.8 section 833.7). A formal flexibility assessment is generally not required for pipe sections with displacement less than the calculated maximum displacement. Reaction forces and moments may require separate analysis.

The developed pipe length is the length measured along the pipe center line. The difference between the developed length, and the straight line length is an approximate measure of the offsets in the line.

CALCULATOR : ASME B31.4 Section 404.3 Pipeline Extruded Branch Reinforcement (Offshore)   Show/Hide

Calculate offshore pipeline branch reinforcement area for extruded branch connections (ASME B31.4 section 404.3).

The corroded extrusion diameter should be used for Do. The design wall thicknesses include the corrosion allowance. For platform piping select the no external pressure option.

CALCULATOR : ASME B31.4 Section 404.3 Pipeline Extruded Branch Reinforcement (Onshore)   Show/Hide

Calculate onshore pipeline branch reinforcement area for extruded branch connections (ASME B31.4 section 404.3).

The corroded extrusion diameter should be used for Do. The design wall thicknesses include the corrosion allowance.

CALCULATOR : ASME B31.4 Section 404.3 Pipeline Welded Branch Reinforcement (Offshore)   Show/Hide

Calculate offshore pipeline branch reinforcement area for welded branch connections (ASME B31.4 section 404.3).

The branch opening length is the maximum of the branch corroded internal diameter, and the axial length of the opening. For platform piping select the no external pressure option.

CALCULATOR : ASME B31.4 Section 404.3 Pipeline Welded Branch Reinforcement (Onshore)   Show/Hide

Calculate onshore pipeline branch reinforcement area for welded branch connections (ASME B31.4 section 404.3).

The branch opening length is the maximum of the branch corroded internal diameter, and the axial length of the opening.

CALCULATOR : ASME B31.4 Section 437.4 Pipeline Hydrostatic And Pneumatic Leak Test Pressure And Hoop Stress Check (Offshore)   Show/Hide

Calculate offshore pipeline test pressure and wall stress check from operating pressure (ASME B31.4 section 437.4). Pipeline pressure should account for variations in elevation and fluid density. For subsea pipelines external pressure should also be accounted for.

CALCULATOR : ASME B31.4 Section 437.4 Pipeline Hydrostatic And Pneumatic Leak Test Pressure And Hoop Stress Check (Onshore)   Show/Hide

Calculate onshore pipeline test pressure and wall stress check from operating pressure (ASME B31.4 section 437.4). Pipeline pressure should account for variations in elevation and fluid density.

CALCULATOR : ASME B31.4 Section 451.6.2.8 Pipeline Allowable Ripple Height From Hoop Stress (Offshore)   Show/Hide

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.

CALCULATOR : ASME B31.4 Section 451.6.2.8 Pipeline Allowable Ripple Height From Hoop Stress (Onshore)   Show/Hide

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).

CALCULATOR : ASME B31.4 Section A402.3 Pipeline Hoop Stress Check From Operating Pressure (Offshore)   Show/Hide

Calculate offshore pipeline hoop stress from operating pressure (ASME B31.4 section A402.3). Pipeline pressure should account for variations in elevation and fluid density. For subsea pipelines external pressure should also be accounted for.

CALCULATOR : ASME B31.4 Section A402.3 Pipeline Wall Thickness From Operating Pressure (Offshore)   Show/Hide

Calculate offshore pipeline wall thickness from operating pressure (ASME B31.4 section A402.3). Pipeline pressure should account for variations in elevation and fluid density. For subsea pipelines external pressure should also be accounted for.

CALCULATOR : Pipeline Axial Load From Temperature And Pressure (Single Layer Pipe Or User Defined)   Show/Hide

Calculate pipeline restrained and unrestrained global axial load from temperature and pressure for single layer pipe. Pipeline section properties are either calculated or user defined. The axial load is calculated using the thick wall formula (API RP 1111 and DNV OS F101). Loads are positive in tension, and negative in compression.

Nominal pipe diameter and wall thickness should normally be used for axial load calculations. Pipe wall stress is indicative only, and should not be used for stress checks. Stress checks should account for local variations in wall thickness and diameter.

CALCULATOR : Pipeline Local Pressure From Elevation (Offshore Pipeline)   Show/Hide

Calculate offshore pipeline local internal pressure and external pressure from elevation using Bernoulli's equation.

The local internal pressure is calculated from the reference pressure and relative elevation. The external pressure is calculated from the water depth. The internal fluid density is assumed constant.

CALCULATOR : Pipeline Local Pressure From Elevation (Onshore Pipeline)   Show/Hide

Calculate onshore pipeline local internal pressure from elevation using Bernoulli's equation.

The local internal pressure is calculated from the reference pressure and relative elevation. The internal fluid density is assumed constant.

INTERNET LINK US GPO : CFR 195 Hazardous Liquid Pipelines
INTERNET LINK Wikipedia : Barlows Formula - Thin Wall Hoop Stress
INTERNET LINK Wikipedia : Cylinder Stress
INTERNET LINK Wikipedia : Pressure Measurement
INTERNET LINK Wikipedia : Stress Mechanics
INTERNET LINK Wikipedia : Yield Surface
SEARCH INDEX : ASME B31.4 Liquid Pipeline Modules
CALCULATOR MODULE : ASME B31.4 (2012) Liquid Pipeline Stress Intensity Factor Calculators   Show/Hide

Calculate flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h (ASME B31.4 table 402.1-1). Refer to the figures for symbols.

For more ASME B31.4 calculators see ASME B31.4 Calculators

Reference : ANSI/ASME B31.4 : Liquid Pipelines