### Types of Welded Steel Pipes
Welded steel pipes come in various types to suit different applications. These include standard welded steel pipes, oxygen-fed steel pipes, conduit pipes for wires, galvanized steel pipes, transformer pipes, and specialized electric welding pipes with custom shapes.
### Dimensions and Weights of Welded Steel Pipes for Low-Pressure Fluid Transfer
The following table outlines the dimensions and theoretical weights of common welded steel pipes used for low-pressure fluid transfer. The data provided includes nominal diameters, outer diameters (OD), wall thicknesses, and corresponding theoretical weights per meter of pipe length.
| Nominal Diameter | OD (mm) | Ordinary Tube | Thickened Tube |
|------------------|----------|-----------------|-----------------|
| (mm) | (in) | Wall Thickness (mm) | Theoretical Weight (kg/m) | Wall Thickness (mm) | Theoretical Weight (kg/m) |
| 6 | 1/8 | 10.00 | 2.00 | 0.39 | 2.50 | 0.46 |
| 8 | 1/4 | 13.50 | 2.25 | 0.62 | 2.75 | 0.73 |
| 10 | 3/8 | 17.00 | 2.25 | 0.82 | 2.75 | 0.97 |
| 15 | 1/2 | 21.25 | 2.75 | 1.26 | 3.25 | 1.45 |
| 20 | 3/4 | 26.75 | 2.75 | 1.63 | 3.50 | 2.01 |
| 25 | 1 | 33.50 | 3.25 | 2.42 | 4.00 | 2.91 |
| 32 | 1 1/4 | 42.25 | 3.25 | 3.13 | 4.00 | 3.78 |
| 40 | 1 1/2 | 48.00 | 3.50 | 3.84 | 4.25 | 4.58 |
| 50 | 2 | 60.00 | 3.50 | 4.88 | 4.50 | 6.16 |
| 65 | 2 1/2 | 75.50 | 3.75 | 6.64 | 4.50 | 7.88 |
| 80 | 3 | 88.50 | 4.00 | 8.34 | 4.75 | 9.81 |
| 100 | 4 | 114.00 | 4.00 | 10.85 | 5.00 | 13.44 |
| 125 | 5 | 140.00 | 4.00 | 13.42 | 5.50 | 18.24 |
| 150 | 6 | 165.00 | 4.50 | 17.81 | 5.50 | 21.63 |
**Calculation Formula:**
W(kg/m) = 0.02466 × thickness × (outer diameter - wall thickness)
### International Welded Pipe Standards
When it comes to international standards for welded steel pipes, several organizations have established guidelines to ensure quality and consistency. For example, the American Society for Testing and Materials (ASTM) provides specifications such as ASTM A53 and ASTM A106, which cover various grades of welded steel pipes for different applications. Similarly, the International Organization for Standardization (ISO) has developed ISO 3183, which outlines requirements for steel pipes used in water and gas distribution systems.
In addition to these standards, regional bodies like the European Committee for Standardization (CEN) also play a crucial role in setting norms for welded steel pipes within Europe. These standards address factors such as material composition, mechanical properties, dimensional tolerances, and testing procedures to ensure that welded steel pipes meet global safety and performance expectations.
While the above information offers a glimpse into the world of welded steel pipes, there are many more details to explore depending on specific industry needs or project requirements. If you're looking for further clarification or need help selecting the right type of pipe for your application, feel free to reach out!
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