Difference between seamless steel pipe and welded steel pipe

　　1. Seamless steel pipe is a kind of long steel with hollow section without joints around. Steel pipe is a hollow section, which is widely used as a pipeline for conveying fluids, such as oil, natural gas, natural gas, water and some solid materials.

　　Compared with solid steel such as round steel, the weight of steel pipe is lighter when the bending and torsional strength are the same. Bicycle frame and steel scaffold for construction. Manufacturing ring parts with steel pipe can improve the material utilization rate, simplify the manufacturing L-shaped sequence, and save materials and processing time, such as rolling bearing ring, jack sleeve, etc.

　　2. Welded steel pipe

　　Welded pipe, also known as welded pipe, is a steel pipe made of steel plate or strip steel by crimping welding. Welded steel pipe has the advantages of simple production process, high production efficiency, many varieties and specifications and less equipment capital, but its general strength is lower than that of seamless steel pipe. Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the development of welding and inspection technology, the welding quality has been continuously improved, the varieties and specifications of welded steel pipes have increased, and more and more fields have replaced nonferrous steel.

　　Welded steel pipes are divided into straight seam welded steel pipes and spiral welded steel pipes according to the weld form. Straight seam welded pipe has the advantages of simple production process, high production efficiency, low cost and rapid development.