seamless steel pipe

　　seamless steel pipe is a steel pipe with longitudinal seamless parallel to seamless steel pipe. Usually divided into metric welded pipe, welded thin-walled tube, transformer cooling tubing and so on. Longitudinal welded pipe production technology is simple, high production efficiency, low cost, to production faster. Spiral seamless steel pipe is strip coil as raw material, regular temperature kneading molding, active double wire double-sided submerged arc welding technology made of spiral seamless steel pipe.