DN550 welded steel pipe, also known as non-559 welded steel pipe, is a carbon steel pipe produced by the cold rolling method (cold casting). The two edges of the pipe are welded together using welding techniques.

Technical specifications of welded steel pipe DN550
Product information:
- Outer diameter: 558.8 mm
- Pipe length: 6 meters, 12 meters
- Thickness: 9mm, 12mm, 16mm, 19mm, 22mm
- Production standards: ASTM A53.A106 Gr.B, API 5L, JIS G3444
- Origin: Imported
Specifications of DN550 steel pipes
| Diameter | Outer diameter (mm) | Length M |
Standard |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 6.35mm | 6.00-12.00 | SCH 10 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 9.53mm | 6.00-12.00 | SCH 20 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 12.7mm | 6.00-12.00 | SCH 30 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 16.1mm | 6.00-12.00 | SCH 40 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 22.2mm | 6.00-12.00 | SCH 60 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 28.6mm | 6.00-12.00 | SCH 80 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 34.9mm | 6.00-12.00 | SCH 100 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 41.3mm | 6.00-12.00 | SCH 120 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 47.6mm | 6.00-12.00 | SCH 140 |
| Steel pipe DN 550 | Steel pipe ϕ559 thickness 54mm | 6.00-12.00 | SCH 160 |
Chemical composition of steel pipe DN550
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) | Min. Pressure Mpa |
| 0.19 | 0.244 | 0.497 | 0.018 | 0.019 | 0.004 | 0.014 | <0.002 | 0.022 | 300/290 | 475/490 | 28/29 | 14.69 |
Tiger Steel is a branch of Bao Tin Steel

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