Steel pipe weight chart and steel pipe weight calculation

This document contains weight tables for API 5L/ASTM SCH 40 and SCH 80 pipes, enabling you to locate the corresponding pipe weight for each specification. We also provide weight calculation formulas, fundamental parameters, and material density coefficients. By studying these resources, you can easily calculate the weight of pipes made from various materials such as carbon steel, stainless steel,alloy steel and PVC.

Before we begin, we need to understand the following concepts:

OD(Outer diameter):The diameter of the pipe’s external contour.

ID(Inner diameter):The diameter of the hollow section inside the pipe.

WT(Wall thickness):The thickness of the pipe’s outer wall.

L:Pipe length。

Pi:The constant π, the mathematical constant known as the mathematical constant, is approximately equal to 3.1416.

ρ:Steel Specific Gravity / Density

Conversion between inches and mm: 1 inch = 25.4 mm

Formula for calculating the ID: OD(Outer Diameter) – 2 × WT(Wall Thickness)

API 5L SCH40 / SCH80 Steel Pipe Weight Chart

Common Pipe Material Density Table

Pipe Weight Calculation Formula

STEEL PIPE WEIGHT (KG) = 0.25 * Pi * (OD² - ID²) * L * ρ

Important Notes：

1. Value Ranges: Density is not an absolute, fixed value. It can vary slightly based on the material’s specific grade, alloy composition, and heat treatment. The table provides typical values or ranges used for engineering calculations.
2. Carbon Steel Density: For common carbon steel pipes (e.g., Q235B, A106 Gr.B), 7850 kg/m³ is the accepted, most commonly used theoretical density for weight estimation.
3. Unit Conversion:The two density columns in the table are equivalent, just expressed differently. For the weight formula :
   • If dimensions (OD, ID, L) are in meters (m), density ρ must be in kg/m³. The resulting weight W will be in kilograms (kg).
   • If dimensions are in millimeters (mm), the density must be converted to kg/mm³ (which is cumbersome and error-prone). It is highly recommended to convert all length units to meters (m) for calculation.

Example Usage:

Calculate the weight of a carbon steel pipe (OD=0.114m, ID=0.102m, L=6m).
Weight = 0.25 * π * (0.114² - 0.102²) * 6 * 7850 ≈ 95.9 kg

Calculate the weight of a PVC pipe (OD=0.110m, ID=0.100m, L=4m), using a mid-range density value of 1500 kg/m³.
Weight = 0.25 * π * (0.110² - 0.100²) * 4 * 1500 ≈ 19.8 kg

However, in everyday use, we may not be able to obtain all of the above parameters. We recommend using the formula below, which provides a simpler method for calculating the weight per meter of pipes made from different materials.

Depending on the material, the weight of the pipe can be quickly calculated by substituting the constant C and the formula, with the unit being kg/m.

STEEL PIPE WEIGHT (KG/M) = C * WT * (OD - WT)

Where the constant C = π × ρ / 1,000,000 (ρ in units of kg/m³),The units for OD and WT are mm.

The following table lists calculation constants for common materials.

Example Usage:

Calculate the weight of a carbon steel pipe (OD=114mm, WT=17.1mm).
Weight = 0.024661 * 17.1 * (114 - 17.1) ≈ 40.86 kg/m

Calculate the weight of a stainless steel pipe (OD=219mm, WT=12.7mm).
Weight = 0.024913 * 12.7 * (219 - 12.7) ≈ 65.27 kg/m