Pipe Weight Calculator
Weight of Empty Pipe
Weight of empty pipe per unit length can be calculated as
wp = ρm Am
= ρm π (do2 - di2) / 4
= (π / 4) ρm (do2 - di2) (1)
where
wp = weight of empty pipe per unit length (kg/m, lb/in)
ρm = density of pipe material (kg/m3, lb/in3)
Am = cross-sectional wall area of pipe (m2, in2)
do = outside diameter (m, in)
di = do - 2 t = inside diameter (m, in)
t = wall thickness (m, in)
Weight of Liquid in Pipe
Weight of liquid in pipes per unit length can be calculated as
wl = ρl Ai
= ρl π (di / 2)2
= (π / 4) ρl di2 (2)
where
wl = weight of liquid in pipe per unit length of pipe (kg, lb)
Ai = cross-sectional inside area of pipe (m2, in2)
ρl = density of liquid (kg/m3, lb/in3)
Weight of Pipe with Liquid
Weight of pipe with liquid can be calculated as
w = wp + wi
= ρm Am + ρl Ai
= (ρm π (do2 - di2) / 4) + (ρl π di2 / 4)
= (π / 4) [ρm (do2 - di2) + ρl di2] (3)
Weight of Pipe Calculator
This calculator can be used to calculate the weight of a pipe with - or without - liquid. The calculator is generic and can be used for both SI and Imperial units as long as the use of units are consistent.
- 1 m = 103 mm
- 1 m2 = 106 mm2
- 1 in = 1/12 ft
- 1 in2 = 1/144 ft2
- 1 lb/in3 = 1728 lb/ft2
Example - Weight of 4" Schedule 40 Steel Pipe with Water - SI Units (default values in the calculator above)
The outside diameter of 4" Schedule 40 Steel Pipe is 114.3 mm. The inside diameter is 102.3 mm. The density of steel is 7850 kg/m3. The density of water is 1000 kg/m3.
The weight of empty pipe per unit length can be calculatet with (1) as:
wp = (π / 4) (7850 kg/m3) ((0.1143 m)2 - (0.1023 m)2)
= 16 kg/m
The weight of the liquid in the pipe per unit length can be calculatet with (2) as:
wl = (π / 4) (1000 kg/m3) (0.1023 m)2
= 8.2 kg/m
The weight of pipe filled with water per unit length can be calculated with (3) as
w = (π / 4) [(7850 kg/m3)((0.1143 m)2 - (0.1023 m)2) + (1000 kg/m3) (0.1023 m)2]
= 24.2 kg/m
Example - Weight of 4" Schedule 40 Steel Pipe
The outside diameter of 4" Schedule 40 Steel Pipe is 4.500 inches. The wall thickness is 0.237 inches and the inside diameter is 4.026 in. The density of steel is 490 lb/ft3 (0.28 lb/in3). The weight of empty pipe per unit length can be calculated as
w = (π / 4) (0.28 lb/in3) ((4.500 in)2 - (4.026 in)2)
= 0.89 lb/in
= 10.7 lb/ft
Typical Weight of Schedule 40 Steel Pipe with/without Water
| Nominal Pipe Size | Weight of Pipe | Weight of Pipe filled with Water | |||
|---|---|---|---|---|---|
| (in) | (mm) | (lbs/ft) | (kg/m) | (lbs/ft) | (kg/m) |
| 3/8 | 10 | 0.6 | 0.9 | 0.7 | 1.0 |
| 1/2 | 15 | 0.8 | 1.2 | 0.9 | 1.2 |
| 3/4 | 20 | 1.1 | 1.7 | 1.3 | 2.0 |
| 1 | 25 | 1.7 | 2.5 | 2.1 | 3.0 |
| 1 1/4 | 32 | 2.3 | 3.4 | 2.9 | 4.3 |
| 1 1/2 | 40 | 2.7 | 4.0 | 3.6 | 5.3 |
| 2 | 50 | 3.6 | 5.4 | 5.0 | 7.5 |
| 2 1/2 | 65 | 5.8 | 8.6 | 7.9 | 11.7 |
| 3 | 80 | 7.6 | 11.2 | 10.8 | 15.9 |
| 3 1/2 | 90 | 9.1 | 13.5 | 13.4 | 19.8 |
| 4 | 100 | 10.8 | 16.0 | 16.3 | 24.2 |
| 5 | 125 | 14.6 | 21.7 | 23.2 | 34.6 |
| 6 | 150 | 19.0 | 28.2 | 31.5 | 46.8 |
| 8 | 200 | 28.5 | 42.5 | 50.1 | 74.6 |
| 10 | 250 | 40.5 | 60.2 | 74.6 | 111 |
| 12 | 300 | 51.1 | 75.9 | 102 | 152 |
| 14 | 350 | 63.0 | 93.7 | 122 | 181 |
| 16 | 400 | 83.0 | 124 | 160 | 237 |
| 18 | 450 | 105 | 156 | 202 | 301 |
| 20 | 500 | 123 | 183 | 243 | 362 |
| 24 | 600 | 171 | 255 | 345 | 514 |
Weight of Insulation on Pipe
Weight of stone wool insulation mat on pipes.
| Nominal Diameter | Outside Diameter (mm) | Insulation Weight (kg/m pipe) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Insulation Thichness (mm) | ||||||||||
| (mm) | (in) | 30 | 40 | 50 | 60 | 80 | 100 | 120 | 140 | |
| 15 | ½ | 21.3 | 4 | 5 | 6 | 8 | 11 | 15 | 19 | 24 |
| 25 | 1 | 33.7 | 4 | 5 | 7 | 8 | 12 | 15 | 20 | 25 |
| 50 | 2 | 60.3 | 5 | 7 | 8 | 10 | 13 | 17 | 22 | 27 |
| 65 | 2½ | 76.1 | 6 | 7 | 9 | 10 | 14 | 18 | 23 | 28 |
| 80 | 3 | 88.9 | 7 | 8 | 10 | 11 | 15 | 19 | 24 | 29 |
| 100 | 4 | 114.3 | 8 | 9 | 11 | 12 | 16 | 21 | 26 | 31 |
| 200 | 8 | 219.1 | 12 | 14 | 16 | 18 | 23 | 28 | 33 | 39 |
| 300 | 12 | 323.9 | 17 | 19 | 21 | 24 | 29 | 35 | 41 | 47 |
| 500 | 20 | 508.0 | 25 | 28 | 31 | 34 | 40 | 47 | 54 | 62 |
| 700 | 28 | 711.0 | 34 | 37 | 41 | 44 | 52 | 60 | 69 | 78 |
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