ERW has the characteristics of high production efficiency, low cost, material saving and easy automation. 

The production process is: slitting-uncoiling-strip leveling-head and tail shear-strip butt welding-loop storage-forming-welding-removing burrs-sizing-flaw detection-flying cutting-initial inspection-steel pipe straightening -Pipe section processing-hydraulic test-flaw detection-printing and coating-finished product. 

The main factors that affect the longitudinal electric resistance welded steel pipe: input heat, welding pressure, welding speed, opening angle, placement position of resistance, etc. 

It is widely used in water supply and drainage engineering, petroleum and natural gas engineering, and can also be used as piling pipes and bridges; pipes for docks, roads, and building structures.

Changsha Xiangjia Metal Materical Co., Ltd.the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.