Straight welded pipe ERW thin wall tube

Straight seam welding is adopted for small diameter welded pipe, while spiral welding is mostly adopted for large diameter welded pipe; According to the end shape of steel pipe, it is divided into circular welded pipe and special-shaped (square, rectangular, etc.) welded pipe; According to different materials and uses, it is divided into welded steel pipe for mining fluid transportation, galvanized welded steel pipe for low-pressure fluid transportation, electric welded steel pipe for belt conveyor idler, etc. Longitudinal welded pipe has the advantages of simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight welded pipe. It can produce welded pipe with larger pipe diameter with narrow blank, and welded pipe with different pipe diameter with blank of the same width. However, compared with the straight seam pipe with the same length, the weld length increases by 30 ~ 100%, and the production speed is low. According to the specification and size table in the current national standard, it is sorted from small to large according to outer diameter * wall thickness. According to the specification and size table in the current national standard, it is sorted from small to large according to outer diameter * wall thickness.