Theoretical steel pipe weight
The theoretical weight of the steel pipe is calculated based on the nominal diameter and density of the steel pipe (in the past called the specific gravity), which is called the theoretical weight. This is directly related to the length, cross-sectional area, and size tolerance of the steel pipe. Due to the allowable deviation of the steel pipe in the manufacturing process, the theoretical weight calculated by the formula is different from the actual weight, so it is only used as a reference for estimation.
Pipe weight calculation formula
a. Round steel pipe weight calculation formula:
kg/m = (Od-WT) * Wt * 0.02466, Od is the outer diameter, and Wt is the wall thickness
b. Square steel pipe weight calculation formula
kg/m = Wt (Oc – 4 Wt) * 0.00785, Oc is the outer circumference, and Wt is wall thickness. Square Oc=4 * a
c. Rectangular steel pipe weight calculation formula
Kg/m = (outer circumference – the sum of 4 sidewall thickness) * wall thickness * 0.00785
Kg/m = (Oc = 2 + 2 b) – the sum of wall thickness) * 0.00785 * wall thickness
Oc = 2a + 2b, a and b is the side length
Galvanized steel pipe weight chart in kg
| DN(mm) | DN(inches） | Outer diameter（mm) | Wall thickness（mm) | weight per meter（kg) |
|---|---|---|---|---|
| 15 | 1/2 | 21.30 | 2.75 | 1.33 |
| 20 | 3/4 | 26.90 | 2.75 | 1.73 |
| 25 | 1 | 33.70 | 3.25 | 2.57 |
| 32 | 1 1/4 | 42.40 | 3.25 | 3.32 |
| 40 | 1 1/2 | 48.30 | 3.50 | 4.07 |
| 50 | 2 | 60.30 | 3.50 | 5.17 |
| 70 | 2 1/2 | 76.10 | 3.75 | 7.04 |
| 80 | 3 | 88.90 | 4.00 | 8.84 |
| 100 | 4 | 114.30 | 4.00 | 11.50 |
| 125 | 5 | 140.00 | 4.50 | 16.85 |
| 150 | 6 | 168.30 | 4.50 | 22.29 |
| 200 | 8 | 219.10 | 6.00 | 36.12 |
Welded steel pipe weight chart in kg
| D N（mm） | D N（inches） | inner diameter（mm） | wall thickness（mm） | outer diameter（mm） | surface area（m² / mm） | weight（kg / m） |
|---|---|---|---|---|---|---|
| 13 | 1/2 | 15 | 2.75 | 21.25 | 0.067 | 1.25 |
| 20 | 3/4 | 20 | 2.75 | 26.75 | 0.084 | 1.63 |
| 25 | 1个 | 25 | 3.25 | 33.50 | 0.105 | 2.42 |
| 32 | 43955 | 32 | 3.25 | 42.25 | 0.133 | 3.13 |
| 38 | 43892 | 40 | 3.50 | 48.00 | 0.151 | 3.84 |
| 50 | 2 | 50 | 3.50 | 60.00 | 0.189 | 4.88 |
| 63 | 43953 | 70 | 3.75 | 75.50 | 0.237 | 6.64 |
| 75 | 3 | 80 | 4.00 | 88.50 | 0.278 | 8.34 |
| 90 | 43953 | 93.2 | 4.00 | 101.20 | 0.318 | 9.5 |
| 100 | 4 | 106 | 4.00 | 114.00 | 0.358 | 10.85 |
| 125 | 5 | 131 | 4.50 | 140.00 | 0.44 | 15.4 |
| 150 | 6 | 156 | 4.50 | 165.00 | 0.518 | 17.81 |
| 200 | 8 | 207 | 6.00 | 219.00 | 0.688 | 31.52 |
| 250 | 10 | 259 | 7.00 | 273.00 | 0.858 | 45.92 |
| 300 | 12 | 309 | 8.00 | 325.00 | 1.02 | 62.54 |
Seamless steel pipe weight chart in kg（hot-rolled steel pipe）
| wall thickness（mm） | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| DN（mm） | 2.5 | 2.8 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 32 | 1.76 | 2.02 | 2.15 | 2.76 | 3.33 | 3.85 | 4.32 | 4.74 | ||
| 38 | 2.19 | 2.43 | 2.59 | 3.35 | 4.07 | 4.74 | 5.35 | 5.92 | ||
| 42 | 2.44 | 2.7 | 2.89 | 3.75 | 4.56 | 5.33 | 6.04 | 6.71 | ||
| 45 | 2.62 | 2.91 | 3.11 | 4.04 | 4.93 | 5.77 | 6.56 | 7.3 | ||
| 50 | 2.93 | 3.25 | 3.48 | 4.54 | 5.55 | 6.51 | 7.42 | 8.26 | ||
| 54 | 3.77 | 4.93 | 6.04 | 7.1 | 8.11 | 9.08 | ||||
| 57 | 4 | 5.23 | 6.41 | 7.55 | 8.63 | 9.67 | ||||
| 60 | 4.22 | 5.52 | 6.78 | 7.99 | 9.15 | 10.29 | ||||
| 63.5 | 4.48 | 5.87 | 7.21 | 8.51 | 9.75 | 10.95 | ||||
| 68 | 4.81 | 6.31 | 7.77 | 9.17 | 10.53 | 11.84 | ||||
| 70 | 4.96 | 6.51 | 8.01 | 9.47 | 10.88 | 12.23 | ||||
| 73 | 5.18 | 6.81 | 8.38 | 9.91 | 11.39 | 12.82 | ||||
| 76 | 5.4 | 7.1 | 8.75 | 10.36 | 11.91 | 13.42 | ||||
| 83 | 7.79 | 9.62 | 11.39 | 13.12 | 14.8 | |||||
| 89 | 8.38 | 10.36 | 12.28 | 14.16 | 15.98 | |||||
| 95 | 8.98 | 11.1 | 13.17 | 15.19 | 17.16 | |||||
| 102 | 9.67 | 11.96 | 14.21 | 16.4 | 18.55 | |||||
| 108 | 10.26 | 12.7 | 15.09 | 17.44 | 19.73 | |||||
| 114 | 10.85 | 13.44 | 15.89 | 18.47 | 20.19 | 23.31 | 25.65 | |||
| 121 | 11.54 | 14.3 | 17.02 | 19.68 | 22.29 | 24.86 | 27.37 | |||
| 127 | 12.13 | 15.04 | 17.9 | 20.72 | 23.48 | 26.19 | 28.85 | |||
| 133 | 12.73 | 15.78 | 18.79 | 21.75 | 24.66 | 27.52 | 30.33 | |||
| 140 | 16.65 | 19.83 | 22.96 | 26.04 | 29.08 | 32.06 | ||||
| 146 | 17.39 | 20.72 | 24 | 27.23 | 30.41 | 33.54 | ||||
| 152 | 18.13 | 21.6 | 25.03 | 28.41 | 31.74 | 35.02 | ||||
| 159 | 18.99 | 22.64 | 26.24 | 29.79 | 33.29 | 36.75 | ||||
| 168 | 20.1 | 23.97 | 27.79 | 31.57 | 35.29 | 38.97 | ||||
| 180 | 21.59 | 25.75 | 29.87 | 33.93 | 37.95 | 41.92 | ||||
| 190 | 23.31 | 27.82 | 32.28 | 36.7 | 41.06 | 45.38 | ||||
| 203 | 29.14 | 33.83 | 38.47 | 43.05 | 47.59 | |||||
| 219 | 31.52 | 36.6 | 41.63 | 46.61 | 51.54 | |||||
| 245 | 41.09 | 46.76 | 52.38 | 57.97 | ||||||
| 273 | 45.29 | 52.28 | 58.6 | 64.86 | ||||||
| 299 | 57.41 | 64.37 | 71.27 | |||||||
| 325 | 62.54 | 70.14 | 77.62 | |||||||
| 351 | 67.67 | 75.91 | 84.1 | |||||||
