Welded vs. seamless steel pipe – abter steel pipe manufacturer, natural gas casing and tubing,seamless steel pipe,OCTG,

24 Mar.,2023


The company has a group of cooperation teams engaged in the Welding Drill Pipe industry for many years, with dedication, innovation spirit and service awareness, and has established a sound quality control and management system to ensure product quality.

Seamless steel tube is made of round billet by hot rolling, cold rolling or cold drawing process. There is no seam on the tube body.

The welded steel pipe is made of flat steel plate and has welds on the tube body.Including ERW tube, LSAW tube, SSAW tube.

The difference between seamless steel pipe and welded steel pipe:

1. Differences in appearance

Seamless steel tube is made of billet.The external surface defects of the billet cannot be eliminated by the hot rolling process and can only be polished after the product is finished.In thinning the wall, only part of the defect can be eliminated.

The surface quality of the hot rolled coil is exactly the same as the surface quality of the pipe. It is easy to control and the surface quality of the hot rolled coil is high.

As a result, the surface quality of welded steel pipe is better than that of seamless steel pipe for many years.

2. Differences in molding process

Seamless steel tubes can be formed once during rolling.

Welded steel pipes are made of steel or sheet steel by bending or by different welding processes.

3. Performance differences

Seamless steel tubes have better pressure bearing capacity and are stronger than ERW welded steel tubes.Therefore, it is widely used in high pressure equipment, heat, boiler industry.

First of all, the welding seam of welded steel pipe is weak, and the quality affects the overall performance.


With high quality products and considerate service, we will work together with you to enhance your business and improve the efficiency. Please don't hesitate to contact us to get more details of Welding Drill Pipe.