### Types of Welded Steel Pipes
Welded steel pipes come in various types, including standard welded steel pipes, oxygen-blown steel pipes, wire conduits, galvanized steel pipes, transformer pipes, and specialized electric welding pipes with unique shapes. These pipes are widely used across industries due to their versatility and cost-effectiveness.
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### Dimensions and Weights of Welded Steel Pipes for Low-Pressure Fluid Transfer
Below is a detailed table showcasing the dimensions and theoretical weights of welded steel pipes for low-pressure fluid transfer. The calculations are based on nominal diameters and wall thicknesses.
| Nominal Diameter (mm) | OD (mm) | Ordinary Tube | Thickened Tube |
|-----------------------|-----------|-----------------------|-----------------------|
| (mm) | (in) | Wall Thickness (mm) | Weight (kg/m) | Wall Thickness (mm) | Weight (kg/m) |
| 6 | 1/8 | 10.00 | 2.00 | 2.50 | 0.46 |
| 8 | 1/4 | 13.50 | 2.25 | 2.75 | 0.73 |
| 10 | 3/8 | 17.00 | 2.25 | 2.75 | 0.97 |
| 15 | 1/2 | 21.25 | 2.75 | 3.25 | 1.45 |
| 20 | 3/4 | 26.75 | 2.75 | 3.50 | 2.01 |
| 25 | 1 | 33.50 | 3.25 | 4.00 | 2.91 |
| 32 | 1 1/4 | 42.25 | 3.25 | 4.00 | 3.78 |
| 40 | 1 1/2 | 48.00 | 3.50 | 4.25 | 4.58 |
| 50 | 2 | 60.00 | 3.50 | 4.50 | 6.16 |
| 65 | 2 1/2 | 75.50 | 3.75 | 4.50 | 7.88 |
| 80 | 3 | 88.50 | 4.00 | 4.75 | 9.81 |
| 100 | 4 | 114.00 | 4.00 | 5.00 | 13.44 |
| 125 | 5 | 140.00 | 4.00 | 5.50 | 18.24 |
| 150 | 6 | 165.00 | 4.50 | 5.50 | 21.63 |
**Calculation Formula:**
W (kg/m) = 0.02466 × thickness × (outer diameter - wall thickness)
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### International Welded Pipe Standards
The global standards for welded steel pipes are designed to ensure quality and safety across different applications. These standards vary by region but generally include specifications for dimensions, tolerances, chemical composition, and mechanical properties. Some commonly referenced international standards include:
- **API 5L**: For pipeline steel pipes.
- **EN 10217**: European standard for seamless and welded structural steel tubes.
- **ASME B36.10M**: General dimensions and tolerances for carbon steel pipes.
- **ISO 3183**: International standard for steel pipes for the transportation of fluids.
These standards play a critical role in ensuring that welded steel pipes meet specific requirements for strength, durability, and performance under varying conditions.
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### Conclusion
Welded steel pipes are essential components in many industries, from construction to energy. Understanding their types, dimensions, and weight specifications is crucial for selecting the right product for any given application. Additionally, adhering to international standards ensures reliability and compliance across global markets.
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