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ASME B31.4 Liquid And Slurry Pipelines

ASME B31.4 Liquid And Slurry Pipelines Calculators

ASME B31.4 Pipe Wall Thickness Calculators : Pipe wall thickness is calculated from hoop stress using Barlow's equation. The mid wall diameter option (Dm) should only be used for offshore pipelines. The girth weld factor does not apply to offshore pipelines. The corrosion allowance should include mechanical allowance (eg threads), erosion allowance and any other allowances. The design factor F includes an allowance for negative maufacturing tolerance or underthickness for approved pipeline specifications (403.2.1). The wall thickness can be calculated from either the outside diameter (constant OD), or the inside diameter (constant ID). The corrosion allowance is assumed to be on the inside of the pipeline. The wall thickness must be designed to contain the internal pressure at all points on the pipeline or pipeline section, allowing for external pressure and elevation. ASME B31.4 includes allowances for fabrication, and for pressure surge. Yield strength values are provided for API 5L.

ASME B31.4 Pipe Hoop Stress Calculators : Pipe hoop stress is calculated using Barlow's equation with either the nominal wall thickness, or the pressure design wall thickness (the nominal wall thickness minus the corrosion allowance), depending on the load case. The mid wall diameter option (Dm) should only be used for offshore pipelines. The girth weld factor does not apply to offshore pipelines. Pipe hoop stress should be calculated for the maximum pressure difference across the pipe wall, allowing for local elevation and water depth (water depth is relevant for subsea pipelines only).

ASME B31.4 Pipe Test Pressure Calculators : The local test pressure must be greater than or equal to the local design pressure multiplied by the test pressure factor, at all points on the pipeline or pipeline section. The hoop stress is calculated using either the nominal wall thickness, or the pressure design wall thickness (the nominal wall thickness minus the corrosion allowance), depending on use case. Generally the nominal wall thickness can be used. Care is required if the hoop stress exceeds 90% of SMYS. The Barlow's equation mid wall diameter option (Dm) should only be used for offshore pipelines.

ASME B31.4 Pipe Combined Stress Calculators : Pipe combined stress (hoop stress, axial stress, bending stress and torsion shear stress) is calculated using either Tresca's equation or Von Mises equation with either the nominal wall thickness, or the pressure design wall thickness (the nominal wall thickness minus the corrosion allowance). The combined stress check is not required for unrestrained pipelines.

ASME B31.4 Pipe Flexibility Calculators : The flexibility check is an approximate measure of the offsets in the pipe section which can accommodate the displacement strain.

ASME B31.4 Pipe Branch Reinforcement Calculators : Calculate the required reinforcement area for welded branches and extruded branches. The reinforcement area must be greater than or equal to the required area Ar. Only reinforcement within the reinforcement area can be included.

ASME B31.4 Pipe Ripple And Corrosion Defect Calculators : Maximum ripple height can be calculated from the hoop stress. Corrosion defects are assessed using ASME B31G. Ripples and corrosion defects may also affect pipeline pigging.

ASME B31 Pipe Stress Intensification Factor Calculators : Calculate flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h. The calculators can be used for ASME B31.3 (table D300), ASME B31.4 (table 402.1-1), and ASME B31.8 (table E-1). Select the appropriate code for your calculation.

Reference : ANSI/ASME B31.4 : Pipeline Transportation Systems For Liquid Hydrocarbons and Other Liquids

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CALCULATOR : ASME B31 Pipe Spool Flexibility Maximum Displacement ... more ...

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 Stress Intensification Factors Butt Weld Offset Or Mismatch ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for butt weld offsets or mismatch.

CALCULATOR : ASME B31 Stress Intensification Factors Concentric Reducer ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for concentric reducers.

CALCULATOR : ASME B31 Stress Intensification Factors Elbow Or Bend ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for elbows or pipe bends.

CALCULATOR : ASME B31 Stress Intensification Factors Extruded Welding Tee ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for extruded welding tees.

CALCULATOR : ASME B31 Stress Intensification Factors Miter Bend Compound ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h factors for compound miter bends.

CALCULATOR : ASME B31 Stress Intensification Factors Miter Bend Single ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for single miter bends.

CALCULATOR : ASME B31 Stress Intensification Factors Reinforced Fabricated Tee ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for reinforced fabricated tees.

CALCULATOR : ASME B31 Stress Intensification Factors Socket Welding Flange ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for socket welding flanges.

CALCULATOR : ASME B31 Stress Intensification Factors Tapered Transition ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for tapered transitions.

CALCULATOR : ASME B31 Stress Intensification Factors Unreinforced Fabricated Tee ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for unreinforced fabricated tees.

CALCULATOR : ASME B31 Stress Intensification Factors Welded In Contour Insert ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for welded in contour inserts.

CALCULATOR : ASME B31 Stress Intensification Factors Welded on Branch Integrally Reinforced ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for integrally reinforced welded on branches.

CALCULATOR : ASME B31 Stress Intensification Factors Welding Tee ... more ...

ASME B31 flexibility factor k, in plane stress intensification factor ii, out of plane stress intensification factor io, and flexibility characteristic h for welding tees.

CALCULATOR : ASME B31.4 Annex A402.3 Pipeline Bi-Plane Longitudinal And Combined Stress Check (Offshore) ... more ...

ASME B31.4 section A402.3 offshore pipeline bi-plane longitudinal stress and combined stress check.

Stresses are calculated for the nominal wall thickness or the pressure containment wall thickness. Bending is assumed to be in-plane. For straight onshore pipe the stress intensity factor i equals 1. For onshore pipe components the longitudinal stress intensity factor has a minimum value of 4/3. For straight pipe the torsion moment is generally equal to zero. The pressure load is calculated using the pressure difference (for platform piping the pressure difference equals the internal pressure). The end force is due to external forces acting on the end of the pipeline, for example spool reaction forces.

CALCULATOR : ASME B31.4 Annex A402.3 Pipeline Hoop Stress Check From Operating Pressure (Offshore) ... more ...

ASME B31.4 section A402.3 offshore pipeline wall stress from operating pressure.

The pressure is user input. Use this calculator for pipelines or piping with small changes in elevation. For platform piping select the no external pressure option.

CALCULATOR : ASME B31.4 Annex A402.3 Pipeline Hoop Stress Check From Operating Pressure And Elevation (Offshore) ... more ...

ASME B31.4 section A402.3 offshore pipeline wall stress from operating pressure and elevation.

The local pressure is calculated from the reference pressure and relative elevation. For onshore pipelines, the maximum hoop stress occurs at the lowest point on the pipeline. For subsea pipelines and risers, the maximum hoop stress can occur at the water line, or the lowest elevation, depending on fluid density. The internal fluid can be either single phase liquid, single phase gas, or two phase gas liquid. The fluid density can vary because of changes in composition and temperature.

CALCULATOR : ASME B31.4 Annex A402.3 Pipeline In-Plane Longitudinal And Combined Stress Check (Offshore) ... more ...

ASME B31.4 section 402.5 offshore pipeline in-plane longitudinal stress and combined stress check.

Stresses are calculated for the nominal wall thickness or the pressure containment wall thickness. Bending is assumed to be in-plane. For straight onshore pipe the stress intensity factor i equals 1. For onshore pipe components the longitudinal stress intensity factor has a minimum value of 4/3. For straight pipe the torsion moment is generally equal to zero. The pressure load is calculated using the pressure difference (for platform piping the pressure difference equals the internal pressure). The end force is due to external forces acting on the end of the pipeline, for example spool reaction forces.

CALCULATOR : ASME B31.4 Annex A402.3 Pipeline Wall Thickness From Operating Pressure (Offshore) ... more ...

ASME B31.4 section A402.3 offshore pipeline wall thickness from operating pressure.

The pressure is user input. Use this calculator for pipelines or piping with small changes in elevation.

CALCULATOR : ASME B31.4 Annex A402.3 Pipeline Wall Thickness From Operating Pressure And Elevation (Offshore) ... more ...

ASME B31.4 section A402.3 offshore pipeline wall thickness from operating pressure and elevation.

The local pressure is calculated from the reference pressure and relative elevation. The pipe wall thickness should be calculated for the maximum pressure or pressure difference at any point on the pipeline. The internal fluid can be either single phase liquid, single phase gas, or two phase fluid. Variations in fluid density due to composition and temperature should be accounted for.

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

ASME B31.4 section 402.3 onshore pipeline wall stress from operating pressure.

The pressure is user input. Use this calculator for pipelines or piping with small changes in elevation. For platform piping select the no external pressure option.

CALCULATOR : ASME B31.4 Section 402.3 Pipeline Hoop Stress Check From Operating Pressure And Elevation (Onshore) ... more ...

ASME B31.4 section 402.3 onshore pipeline wall stress from operating pressure and elevation.

The local pressure is calculated from the reference pressure and relative elevation. For onshore pipelines, the maximum hoop stress occurs at the lowest point on the pipeline. The internal fluid can be either single phase liquid, single phase gas, or two phase gas liquid. The fluid density can vary because of changes in composition and temperature.

CALCULATOR : ASME B31.4 Section 402.5 Pipeline Expansion Stress Check (Onshore) ... more ...

ASME B31.4 section 402.5 pipeline expansion stress check.

Stresses are calculated for the nominal wall thickness. For straight onshore pipe the stress intensity factor i equals 1. For onshore pipe components the longitudinal stress intensity factor has a minimum value of 4/3. For straight pipe the torsion moment is generally equal to zero. The pressure load is calculated using the pressure difference (for onshore pipelines the pressure difference equals the internal pressure). The allowable expansion stress is calculated from the yield stress at the maximum temperature (Sh), and the yield stress at the minimum temperature (Sc). The yield stress values should be obtained from material tests.

CALCULATOR : ASME B31.4 Section 402.5 Pipeline In-Plane Longitudinal And Combined Stress Check (Onshore) ... more ...

ASME B31.4 section 402.5 onshore pipeline in-plane longitudinal stress and combined stress check.

Stresses are calculated for the nominal wall thickness or the pressure containment wall thickness. Bending is assumed to be in-plane. For straight pipe the torsion moment is generally equal to zero. The combined stress can be calculated using either Tresca's or Von Mises combined stress formula. The installation force is due to loads on the pipeline during installation, for example lay tension.

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

ASME B31.4 section 403.2 onshore pipeline wall thickness from operating pressure.

The pressure is user input. Use this calculator for pipelines or piping with small changes in elevation.

CALCULATOR : ASME B31.4 Section 403.2 Pipeline Wall Thickness From Operating Pressure And Elevation (Onshore) ... more ...

ASME B31.4 section 403.2 onshore pipeline wall thickness from operating pressure and elevation.

The local pressure is calculated from the reference pressure and relative elevation. The pipe wall thickness should be calculated for the maximum pressure at any point on the pipeline. The internal fluid can be either single phase liquid, single phase gas, or two phase fluid. Variations in fluid density due to composition and temperature should be accounted for.

CALCULATOR : ASME B31.4 Section 404.3 Pipeline Extruded Branch Reinforcement (Offshore) ... more ...

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

The branch material is assumed to have an equal or greater yield stress than the extrusion material. The branch girth weld factor E is assumed tobe equal to one (1.0). 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) ... more ...

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

The branch material is assumed to have an equal or greater yield stress than the extrusion material. The branch girth weld factor E is assumed tobe equal to one (1.0). 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) ... more ...

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

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) ... more ...

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

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 Test Pressure And Hoop Stress Check From Operating Pressure (Offshore) ... more ...

ASME B31.4 section 437.4 offshore pipeline test pressure and wall stress check from operating pressure.

The operating pressure is user input. Use this calculator for pipelines or piping with small changes in elevation. For platform piping select the no external pressure option.

CALCULATOR : ASME B31.4 Section 437.4 Pipeline Test Pressure And Hoop Stress Check From Operating Pressure (Onshore) ... more ...

ASME B31.4 section 437.4 onshore pipeline test pressure and wall stress check from operating pressure.

The operating pressure is user input. Use this calculator for pipelines or piping with small changes in elevation. For platform piping select the no external pressure option.

CALCULATOR : ASME B31.4 Section 437.4 Pipeline Test Pressure And Hoop Stress Check From Operating Pressure And Elevation (Offshore) ... more ...

ASME B31.4 section 437.4 offshore pipeline test pressure and wall stress check from operating pressure and elevation.

The local operating pressure, and the reference test pressure are calculated from elevation. The reference test pressure should be calculated so that the ratio of local test pressure to local operating pressure is greater than or equal to the test pressure ratio at all points on the pipeline. The internal fluid can be either single phase liquid, single phase gas, or two phase gas liquid. The test fluid can be either single phase gas, or single phase liquid. Calculations should account for variations in the composition and temperature of the operating fluid and the test fluid.

CALCULATOR : ASME B31.4 Section 437.4 Pipeline Test Pressure And Hoop Stress Check From Operating Pressure And Elevation (Onshore) ... more ...

ASME B31.4 section 437.4 onshore pipeline test pressure and wall stress check from operating pressure and elevation.

The local operating pressure, and the reference test pressure are calculated from elevation. The reference test pressure should be calculated so that the ratio of local test pressure to local operating pressure is greater than or equal to the test pressure ratio at all points on the pipeline. The internal fluid can be either single phase liquid, single phase gas, or two phase gas liquid. The test fluid can be either single phase gas, or single phase liquid. Calculations should account for variations in the composition and temperature of the operating fluid and the test fluid.

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

ASME B31.4 section 451.6.2.8 offshore pipeline maximum allowable ripple height from hoop stress.

The hoop stress is calculated using Barlow's formula. The mid wall option (Dm), should only be used for offshore pipelines. The hoop stress can 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) ... more ...

ASME B31.4 section 451.6.2.8 onshore pipeline maximum allowable ripple height from hoop stress.

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

CALCULATOR : ASME B31G Level 0 Defect Assessment For Corroded Pipelines ... more ...

ASME B31.G level 0 defect assessment and allowable defect length for corroded pipelines.

Calculate the allowable defect length, based on the original B31.G method. The level 0 assessment can be used as an initial screening assessment. Defects which fail the level 0 assessment require further assessment, or repair.

CALCULATOR : ASME B31G Level 1 Defect Assessment Pressure Derating For Corroded Pipelines ... more ...

ASME B31.G level 1 defect assessment and pressure derating for corroded pipelines.

Calculate the derated operating pressure for defects which have failed the level 0 assessment. The level 0 assessment is included with the level 1 assessment, and can be used for initial screening. The level 1 assessment should be performed for defects which have failed the level 0 assessment. Defects which have failed the level 1 assessment require further assessment or repair.

CALCULATOR : Fluid Density And Composition ... more ...

Fluid density for single phase fluid, single phase gas, and two phase gas liquid.

For two phase fluids the fluid density and composition can be calculated from either the average fluid density, the gas oil ratio GOR, the gas mass fraction, the gas volume fraction, or can be user defined.

CALCULATOR : Gas Specific Gravity Molar Mass And Density ... more ...

Single phase gas specific gravity and molar mass.

Gas molar mass is approximately equal to the molar mass of dry air times the gas specific gravity at standard conditions (for most gases the compressibility factor Z is approximately equal to 1 at standard conditions). The molar mass of dry air is taken as 28.964 kg/kg-mole. For gas mixtures, gas specific gravity is easier to measure than the molar mass.

CALCULATOR : Pipeline Axial Load From Temperature And Pressure (Single Layer Pipe Or User Defined) ... more ...

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 DNV thick wall formula. 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 Expansion Spool Combined Stress Check ... more ...

Combined hoop, longitudinal, bending and torsion stress in a pipeline expansion spool.

For expansion spools in contact with the ground, the bending moment and axial load should be calculated for combined lateral displacement and lateral friction loads. For suspended spools not in contact with the ground, the bending moment and axial load should be calculated for lateral displacement only. Bending is assumed to be in-plane. Suspended spools should be supported to prevent bi-planar or two dimensional bending.

The combined stress can be calculated using either Tresca's or Von Mises' formula. Generally, the combined stress should be less than or equal to 90% of yield. The nominal wall thickness is used for the calculations.

CALCULATOR : Pipeline Fluid Density Mass Moles Volume And Length ... more ...

Pipeline fluid density, mass and volume for single phase fluid, single phase gas, and two phase gas liquid.

For two phase fluids the fluid density and composition can be calculated from either the average fluid density, the gas oil ratio GOR, the gas mass fraction, the gas volume fraction, or can be user defined. Fluid quantities (mass, volume, and gas moles) can be calculated from liquid volume, gas moles, total volume, total mass, or pipeline length.

CALCULATOR : Pipeline Fluid Density Volume Flow Rate Mole Flow Rate Mass Flow Rate And Velocity ... more ...

Pipeline fluid density and flow rate for single phase fluid, single phase gas, and two phase gas liquid.

For two phase fluids the fluid density and composition can be calculated from either the average fluid density, the gas oil ratio GOR, the gas mass fraction, the gas volume fraction, or can be user defined. Fluid flow rate (velocity, mass flow rate, volume flow rate, and gas mole flow rate) can be calculated from liquid volume flow rate, gas mole flow rate, total volume flow rate, total mass flow rate, or fluid velocity.

CALCULATOR : Pipeline Internal And External Pressure From Elevation ... more ...

Pipeline internal and external static pressure from elevation, for single phase liquid, single phase gas, and two phase gas liquid.

External pressure is optional. For onshore pipelines use the ignore external pressure option. The two phase calculation is approximate and should be used for information only. For more accurate results, or to calculate transients, specialised fluid flow software should be used.

WWW LINK : US GPO : CFR 195 Hazardous Liquid Pipelines
WWW LINK : Wikipedia : Barlows Formula - Thin Wall Hoop Stress
WWW LINK : Wikipedia : Pressure Measurement
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