Pipe weight and line fill volume
Weight per metre of steel pipe and of the whole section, the internal (line fill) volume and the mass of the product in the line.
m = π · (D − t) · t · ρ_s = 0.02466 · (D − t) · t [kg/m; D, t in mm]V = π · (D − 2t)² / 4 · LM = V · ρThe weight is of plain-end bare pipe without welds, at a steel density of 7 850 kg/m³ (as in API 5L and GOST); add the coating and ballast separately.
Source: API 5L / ISO 3183 (plain-end weight)
Inputs
You can change a field's unit: the value is converted to the formula's units automatically.
Oil 800–900 kg/m³, water 1 000, formation water up to 1 180; for gas, the density at the operating pressure.
Unit converter for this formulaLength · Density and °API · Weight per length · Mass · Liquid volume · Volume per length (capacity)
- m1
- cm100
- mm1,000
- km0.001
- ft3.28084
- in39.3701
- 1/32 in1,259.84
- 1/64 in2,519.69
- mile0.000621371
- M_s — Steel mass of the section–
- V — Line fill volume–
- v_L — Capacity per metre–
- M — Mass of the product in the line–
More in Pipelines
Design wall thickness by Barlow's formula with the factors of ASME B31.4 (liquid pipelines) and B31.8 (gas pipelines), the corrosion allowance, and the allowable pressure of the selected pipe.
Friction loss by Darcy-Weisbach (friction factor from Colebrook-White, 64/Re in laminar flow) plus the elevation change; the flow velocity and Reynolds number.
Gas flow rate from the inlet and outlet pressures — the general isothermal flow equation with the Colebrook-White friction factor; gas velocity, average pressure, Reynolds number.
Hoop stress and its percentage of SMYS at the test pressure — at the gauge and at the lowest point of the section, where the water column adds to the pressure.
Free expansion of a section with a temperature change, and the longitudinal stress in a pipeline restrained by the soil, including the internal pressure (Poisson effect); the axial force.
Results are engineering estimates from standard formulas; for design decisions check them against the codes, project documents and specialists' calculations. The formulas carried over from the original set are unchanged, and their errors are described in the notes.