Welded Pipe
Welded pipe is a type of steel pipe made by bending steel plates or strips into the desired shape (round, square, or rectangular) and then welding the seams. Unlike seamless pipes, welded pipes feature visible welds along the joint, making them more cost-effective and faster to produce. With advances in welding and inspection technology since the 1930s, welded pipes have become widely used in various industries, increasingly replacing seamless pipes for many applications.
Types of Welded Pipe
Welded pipes can be categorized based on the seam shape:
- Straight Seam Welded Pipe
Straight seam welded pipes are produced with a simple manufacturing process, offering high production efficiency and lower costs. They are typically used for smaller diameter applications where production speed and economy are priorities. - Spiral Welded Pipe
Spiral welded pipes generally provide higher strength compared with straight seam pipes. A narrower steel strip can be used to produce larger-diameter pipes, and the same strip can be used to produce different diameters. However, for pipes of the same length, the weld seam length increases by 30–100%, and production speed is slower. Spiral welded pipes are commonly used for larger-diameter applications.
Spiral welded pipe types include:
- Automatic submerged arc welding (SAW): Classified as Class A or B based on medium pressure, commonly using Q235, Q235F, or low-alloy steel 16Mn.
- High-frequency welding (HFW): Typically manufactured from Q235, Q235F, or similar carbon steels, mainly for low-pressure fluid transportation.
Materials and Standards for Welded Pipe
Welded pipes can be categorized based on the seam shape:
- Straight Seam Welded Pipe
Straight seam welded pipes are produced with a simple manufacturing process, offering high production efficiency and lower costs. They are typically used for smaller diameter applications where production speed and economy are priorities. - Spiral Welded Pipe
Spiral welded pipes generally provide higher strength compared with straight seam pipes. A narrower steel strip can be used to produce larger-diameter pipes, and the same strip can be used to produce different diameters. However, for pipes of the same length, the weld seam length increases by 30–100%, and production speed is slower. Spiral welded pipes are commonly used for larger-diameter applications.
Spiral welded pipe types include:
- Automatic submerged arc welding (SAW): Classified as Class A or B based on medium pressure, commonly using Q235, Q235F, or low-alloy steel 16Mn.
- High-frequency welding (HFW): Typically manufactured from Q235, Q235F, or similar carbon steels, mainly for low-pressure fluid transportation.
Why Choose Glory Steel Work for Welded Pipe?
- Cost-Effective: Lower production costs than seamless pipes without sacrificing performance
- Custom Sizes & Processing: Available in various diameters, wall thicknesses, and shapes
- Technical Support & Fast Delivery: Ensuring projects stay on schedule and meet specifications
- Cost-Effective: Lower production costs than seamless pipes without sacrificing performance
Get Your Welded Pipe Quote Today
Glory Steel Work supplies high-quality welded pipe (straight seam, spiral, LSAW, ERW, HFW) in custom diameters and wall thicknesses.
We offer fast quotations, MTC, cutting & threading services, and technical guidance to ensure your pipeline and structural projects run on schedule.