Looking to learn more about steel pipes and their various types, applications, and weight calculations? Look no further than this comprehensive guide!
Whether you’re a seasoned industry professional or simply curious about the world of steel pipes, this article has everything you need to know. From the different categories of steel pipes to the calculation of pipe weight, we’ve got you covered.
So sit back, relax, and let us take you on a journey through the fascinating world of steel pipes.
What is pipe?
A steel structure with a hollow section, where the length is significantly greater than its diameter or circumference, is referred to as a pipe.
Types of pipe
Steel pipes can be classified into different categories based on their section shape, material, purpose, and production process.
In terms of section shape, steel pipes can be round, square, rectangular, or special-shaped. According to the material, they can be divided into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes, and composite steel pipes.
The purpose of steel pipes can determine their classification, for example, steel pipes for transmission pipelines, engineering structures, thermal equipment, the petrochemical industry, machinery manufacturing, geological drilling, and high-pressure equipment.
In terms of the production process, steel pipes can be either seamless or welded. Seamless steel pipes can further be divided into hot-rolled and cold-rolled (drawn) types. Welded steel pipes can be either straight-seam welded steel pipes or spiral-seam welded steel pipes.
Steel pipes have a wide range of applications, such as conveying fluid and powdery solid, exchanging heat energy, manufacturing mechanical parts and containers, and being an economic steel.
The use of steel pipes in building structure grids, struts, and mechanical supports can reduce weight, save 20-40% of the metal, and enable industrialized and mechanized construction. The use of steel pipes in manufacturing highway bridges can save steel, simplify construction, reduce the area of protective coating, and lower investment and maintenance costs.
How to calculate pipe weight?
The calculation formula of pipe weight is:
W (kg / M) = 0.02466 * wall thickness * (outer diameter – wall thickness)
Pipe Weight Calculator
According to the standards GB/T 21835-2008 and GB/T 17395-2008 for dimensions and weight per unit length of welded steel pipes, the theoretical weight calculation method for circular steel pipes, such as welded pipes and seamless pipes, is the same.
In the market, steel pipes can be delivered based on either theoretical weight or actual weight. When steel pipes are delivered based on theoretical weight, the density of ordinary and precision steel pipes is 7.85g/cm3, and the density of other steel types is specified in relevant standards.
You can use a steel pipe weight calculator to determine the weight of various steel pipes.
Related Tool: Steel Weight Calculator
Pipe Weight Chart
| Pipes | No. | Nominal diameter | O.D. | Thickness | Weight |
| JDG pipe | 1 | 16 | 15.7 | 1.2 | 0.43 |
| 2 | 20 | 19.7 | 1.2 | 0.55 | |
| 3 | 25 | 24.7 | 1.2 | 0.70 | |
| 4 | 32 | 31.6 | 1.2 | 0.90 | |
| 5 | 40 | 39.6 | 1.2 | 1.14 | |
| 6 | 50 | 49.6 | 1.2 | 1.43 | |
| 7 | 16 | 15.7 | 1.6 | 0.56 | |
| 8 | 20 | 19.7 | 1.6 | 0.71 | |
| 9 | 25 | 24.7 | 1.6 | 0.91 | |
| 10 | 32 | 31.6 | 1.6 | 1.18 | |
| 11 | 40 | 39.6 | 1.6 | 1.50 | |
| 12 | 50 | 49.6 | 1.6 | 1.89 | |
| KBG pipe | 1 | 16 | 15.7 | 1.2 | 0.43 |
| 2 | 20 | 19.7 | 1.2 | 0.55 | |
| 3 | 25 | 24.7 | 1.2 | 0.70 | |
| 4 | 32 | 31.6 | 1.2 | 0.90 | |
| Conduit TC | 1 | 16 | 15.87 | 1.6 | 0.56 |
| 2 | 20 | 19.05 | 1.6 | 0.69 | |
| 3 | 25 | 25.4 | 1.6 | 0.94 | |
| 4 | 32 | 31.75 | 1.6 | 1.19 | |
| 5 | 40 | 38.1 | 1.6 | 1.44 | |
| 6 | 50 | 50.8 | 1.6 | 1.94 | |
| Welded steel pipe | 1 | 16 | 20.75 | 2.5 | 1.13 |
| 2 | 20 | 26.25 | 2.5 | 1.46 | |
| 3 | 25 | 32 | 2.5 | 1.82 | |
| 4 | 32 | 40.75 | 2.5 | 2.36 | |
| 5 | 40 | 46 | 2.5 | 2.68 | |
| 6 | 50 | 58 | 2.5 | 3.42 | |
| 7 | 70 | 74 | 3 | 5.25 | |
| 8 | 80 | 86.5 | 3 | 6.18 | |
| 9 | 100 | 112 | 3 | 8.06 | |
| Water gas steel pipe | 1 | 16 | 21.25 | 2.75 | 1.25 |
| 2 | 20 | 26.75 | 2.75 | 1.63 | |
| 3 | 25 | 33.5 | 3.25 | 2.42 | |
| 4 | 32 | 42.25 | 3.25 | 3.13 | |
| 5 | 40 | 48 | 3.5 | 3.84 | |
| 6 | 50 | 60 | 3.5 | 4.88 | |
| 7 | 70 | 75.5 | 3.75 | 6.64 | |
| 8 | 80 | 88.5 | 4 | 8.34 | |
| 9 | 100 | 114 | 4 | 10.85 | |
| 10 | 125 | 140 | 4.5 | 15.04 | |
| 11 | 150 | 165 | 4.5 | 17.81 | |
| Galvanized steel pipe | 1 | 15 | 2.75 | 1.33 | |
| 2 | 20 | 2.75 | 1.73 | ||
| 3 | 25 | 3.25 | 2.57 | ||
| 4 | 32 | 3.25 | 3.32 | ||
| 5 | 40 | 3.50 | 4.07 | ||
| 6 | 50 | 3.50 | 5.17 | ||
| 7 | 70 | 3.75 | 7.04 | ||
| 8 | 80 | 4.00 | 8.84 | ||
| 9 | 100 | 4.00 | 11.50 | ||
| 10 | 125 | 4.50 | 16.85 | ||
| 11 | 150 | 4.50 | 22.29 | ||
| Galvanized round steel | 1 | 6 | 0.222 | ||
| 2 | 8 | 0.395 | |||
| 3 | 10 | 0.617 | |||
| 4 | 12 | 0.888 | |||
| Galvanized flat steel | 1 | 40*4 | 1.26 | ||
| 1 | 25*4 | 0.79 | |||
