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Pipeline Dimension Modules

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CALCULATOR MODULE : Line Pipe Cross Section   ±

Calculate pipe internal and external diameter, cross section area and EI from pipe schedule diameter and wall thickness.

Use the Result Table option to display the results for the selected pipe diameter. For multi layer pipes (line pipe with outside layers and or inside layers), the results for each layer are displayed in the output view at the bottom of the page. Change the number of layers on the setup page.

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CALCULATOR MODULE : Line Pipe EA And EI   ±
CALCULATOR MODULE : Line Pipe Unit Mass And Weight   ±
CALCULATOR MODULE : Line Pipe Wall Thickness And Diameter   ±

Calculate pipe nominal wall thickness, minimum wall thickness and pressure design wall thickness from pipe schedule diameter and wall thickness.

For most pipeline codes the pressure design thickness equals the nominal wall thickness minus the fabrication allowance and the corrosion allowance (use the with tolerance calculator). For some codes the fbrication allowance is ignored and the pressure design thickness equals the nominal wall thickness minus the corrosion allowance.

Use the Result Table option to display the results for the selected pipe schedule and pipe diameter.

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CALCULATOR MODULE : Line Pipe Thermal Conductivity And Heat Transfer   ±
CALCULATOR MODULE : Plastic Pipe Cross Section   ±

Calculate plastic pipe diameter, wall thickness, tolerances, dimension ratio, unit mass (mass per length), and total mass from pipe schedule diameter and wall thickness or dimension ratio.

Use the Result Table option to display the results for the selected pipe diameter. The dimension ratio is based on the Renard R10 series. The standard dimension ratio SDR equals R10 + 1 and is calculated from the outside diameter divided by the pressure design wall thickness. The standard internal dimension ratio SIDR equals R10 - 1 and is calculated from the inside diameter divided by the pressure design wall thickness.

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CALCULATOR MODULE : Plastic Pipe Rated Pressure   ±

Calculate plastic pipe maximum allowable design pressure from pipe schedule diameter and wall thickness or dimension ratio.

Use the Result Table option to display the results for the selected pipe diameter. The dimension ratio is based on the Renard R10 series. The standard dimension ratio SDR equals R10 + 1 and is calculated from the outside diameter divided by the pressure design wall thickness. The standard internal dimension ratio SIDR equals R10 - 1 and is calculated from the inside diameter divided by the pressure design wall thickness. The pressure design wall thickness is equal to the nominal wall thickness minus the fabrication allowance and the mechanical allowance. The mechanical allowance includes allowances for threads, machining, glueing, corrosion, erosion, and mechanical damage.

The allowable pressure can be calculated directly from the dimension ratio and the minimum required strength (MRS). A service design coefficient (C value) of 1.25 is suitable for water pipes. For other fluids a higher C value should be used.

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CALCULATOR MODULE : API 5L Line Pipe   ±

Calculate API 5L line pipe diameter, wall thickness and mass schedule.

For some pipe codes (eg ASME B31.4, ASME B31.8, API RP 111 and AS 2885.1) the fabrication tolerance is included in the design factor, and provided that fabrication tolerances are within the relevant specification. For these codes the pressure design or pressure containment wall thickness equals the nominal wall thickness minus the corrosion and mechanical allowance.

For other codes (eg ASME B31.1, ASME B31.3 and ASME B31.5) the fabrication tolerance must be included in the pressure design calculation. For these codes the minimum wall thickness equals the nominal wall thickness minus the fabrication allowance. The pressure containment wall thickness equals the nominal wall thickness minus the fabrication allowance, and minus the corrosion allowance. Fabrication tolerance can be defined by either a fabrication allowance, or a fabrication fraction.

The pipe diameter can be defined by either the outside diameter or the inside diameter. Use the Result Table option to display a table of pipe schedule versus wall thickness for the selected diameter.

References :

API 5L : Specification for Line Pipe (2007)
ISO 3183 : Petroleum and Natural Gas Industries - Steel Pipe For Pipeline Transportation Systems (2007)

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CALCULATOR MODULE : Parallel And Series Piping Fitting   ±

Calculate minor loss factors for parallel and series pipe fittings.

The effective K factor for fittings in series equals the sum of the K factors.

`Ke = ΣKi `

For fittings in parallel the inverse effective K factor equals the sum of the inverse K factors.

`1/(Ke) = Σ1/(Ki) `

The calculators can be used for parallel and series K factor, discharge coefficient Cd, dimensionless flow coefficient Cv*, and flow coefficients Av, Cv-uk, Cv-us, Cv-met and Kv.

Minor loss factors are calculated for:

  • Av (SI) flow coefficient - the flow in cubic meters per second fluid density 1 kilogram per cubic meter which gives a pressure drop of 1 Pa
  • Cv-uk (UK) flow coefficient - the flow in UK gallons per minute of water at 60 degrees F which gives a pressure drop of 1 psi
  • Cv-us (US) flow coefficient - the flow in US gallons per minute of water at 60 degrees F which gives a pressure drop of 1 psi
  • Cv-met (Metric) flow coefficient - the flow in liters per minute of water at 16 degrees C which gives a pressure drop of 1 bar
  • Kv (EU) flow coefficient - the flow in cubic meters per hour of water at 16 degrees C which gives a pressure drop of 1 bar
  • Cv* the dimensionless US flow factor = Cv-us / din^2 (din is the inside diameter in inches)
  • K factor - the ratio of pressure loss over the dynamic pressure
  • Cd or discharge coefficient - the ratio of the actual flow rate of the fluid through the fitting over the frictionless flow rate.

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CALCULATOR MODULE : Dimensionless Relative Roughness Number   ±

Calculate the dimensionless relative roughness or roughness number for pipes and rectangular ducts.

`rr = (ir) / (ID) `

where :

rr = relative roughness or roughness number
ir = surface roughness
ID = pipe inside diameter

For rectangular ducts the hydraulic diameter is used

`ID = 2 w h / (w + h) `

where :

ID = hydraulic diameter
w = duct width
h = duct height

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CALCULATOR MODULE : Dimensionless Reynolds Number   ±

Calculate the dimensionless Reynolds number for pipes, rectangular ducts and general flow.

The Reynolds number approximates the ratio of kinetic energy over viscous drag loss.

`Re = ρ V L / μ = V L / ν `

where :

Re = Reynolds number
ρ = fluid density
V = fluid velocity
L = characteristic length
μ = dynamic viscosity
ν = kinematic viscosity = μ / ρ

At low reynolds numbers the flow is laminar. At high Reynolds numbers the flow is turbulent. The characteristic length is a defining length dimension. For pipelines the inside diameter is used as the characteristic length. For rectangular ducts the hydraulic diameter is used as the characteristic length.

`ID = 2 w h / (w + h) `

where :

ID = hydraulic diameter
w = duct width
h = duct height

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DATA MODULE : Pipeline Surface Roughness ( Open In Popup Workbook )   ±

Pipeline surface roughness and efficiency data.

Typical pipe surface roughness values, API 14E Panhandle equation efficiency factors for pipeline pressure drop, and Hazen Williams and Manning coefficients for pipeline pressure loss.

    Related Modules :

    DATA MODULE : Line Pipe Diameter And Wall Thickness ( Open In Popup Workbook )   ±
    DATA MODULE : Line Pipe Manufacturing Tolerance ( Open In Popup Workbook )   ±
    DATA MODULE : Line Pipe Joint Length ( Open In Popup Workbook )   ±
    DATA MODULE : ASME B31 Pipe And Flange Dimension ( Open In Popup Workbook )   ±

    ASME B31.8 gas pipe and flange data values: pipe dimensions, flange dimensions, cover requirements, cold bends, burn through and location class.

    Reference : ANSI/ASME B31.8 : Gas Transmission And Distribution Piping Systems

      Related Modules :

      DATA MODULE : Flange Bolt ( Open In Popup Workbook )   ±
      DATA MODULE : Pipe Flange ( Open In Popup Workbook )   ±
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