Q355B Spiral Welded Steel Pipe
Introduction to Spiral Welded Pipe
Q355B spiral welded steel pipe is a type of welded steel pipe made from Q355B hot-rolled steel coils. It is produced by continuously rolling the steel strip at a certain angle using spiral forming technology, and then welding the inner and outer seams together using submerged arc welding. It is renowned for its large diameter, strong pressure resistance, and high production efficiency.
Q355B spiral welded steel pipe boasts unique advantages in structure and manufacturing process
Its spiral weld seam effectively avoids stress concentration, resulting in more even stress distribution within the pipe body and thus exhibiting superior pressure-bearing capacity. Simultaneously, the process offers exceptional flexibility; using steel strips of the same width, various pipe diameters can be produced by adjusting the forming angle. This not only reduces the requirements for raw material specifications but also significantly improves cost-effectiveness when manufacturing ultra-large diameter pipes. Furthermore, the continuous forming and welding process from steel strip to finished pipe ensures extremely high production efficiency.
Chemical composition table of Q355B steel
| Element symbol |
Standard specified value (maximum value, unless otherwise specified) |
|---|---|
| C | ≤ 0.24 |
| Si | ≤ 0.55 |
| Mn | ≤ 1.60 |
| P | ≤ 0.035 |
| S | ≤ 0.035 |
| Nb | 0.015 ~ 0.060 |
| V | 0.02 ~ 0.15 |
| Ti | 0.02 ~ 0.20 |
| Cr | ≤ 0.30 |
| Ni | ≤ 0.50 |
| Cu | ≤ 0.40 |
| N | ≤ 0.015 |
| CEV | ≤ 0.44 |
About our company
We are a professional company deeply involved in international steel trade, dedicated to promoting high-quality Chinese welded pipe products to the global market. Our main product line is Q355B welded pipe, encompassing various process types including high-frequency straight seam welded pipe and spiral welded pipe. Leveraging our profound understanding of international standards and end-use applications, we can provide customers with end-to-end solutions from procurement to logistics and distribution.
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