The steel pipe with the ratio of the outer diameter of the steel pipe to the wall thickness is less than 20 is called thick-walled straight seam steel pipe. It is used as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural pipe for automobiles, tractors, and aviation.

The biggest difference between thick-walled straight seam steel pipe and thin-walled straight seam steel pipe is the thickness of the steel pipe wall. It is generally think that the wall thickness/pipe diameter is less than 0.02 is thin-walled steel pipe, and the larger is thick-walled straight seam steel pipe. 

Thin-walled steel pipe are used for pipelines. Thick-walled straight seam steel pipes are used as hollow parts, such as pressure-bearing and important pipelines.

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.