The main difference between straight seam steel pipe and seamless steel pipe(astm a53 steel pipe) is production technology and application. Straight seam steel pipe is actually a piece of iron plate, which is produced through multiple processes such as jointing, bending, welding, etc., and it is allowed to have a weld. The seamless steel pipe is a round steel hot rolled by a pipe rolling mill, and it is not allowed to have welds.

The seamless steel pipe is a whole round steel pipe made directly from round steel, which is drawn directly from the steel billet, while the straight seam steel pipe is finished by welding with strip steel crimping.

Straight seam steel pipe is actually a steel pipe parallel to the longitudinal direction of the weld quality inspection. Usually can be divided into electric welded steel pipe, electric welded thin-walled pipe and so on. The production efficiency of straight seam steel pipes is high, the cost is low, the production process is extremely simple, and the development mode is also very fast.

The strength of seamless steel pipes is stronger than that of straight seam steel pipes. A narrower blank can be used to produce larger pipe diameter steel pipes, and the same width blank can be used to produce steel pipes with different pipe diameters. However, compared with the straight seam steel pipe of the same length, the length of the weld can be increased by 30% to 100%, and the production speed of the straight seam steel pipe is relatively lower than that of the seamless steel pipe.