The biggest difference between thick wall steel pipe and thin-wall steel pipe is the thickness of the steel pipe wall. Generally speaking, thin-wall steel pipes are cold-drawn technology, while thick-wall steel pipes generally use hot-rolled technology. In terms of units, it is generally believed that the wall thickness/pipe diameter equal to 0.05 is the watershed between thick-walled steel pipes and thin-walled steel pipes, and those with wall thickness/pipe diameter less than 0.05 are thin-walled steel pipes, and thick-walled steel pipes that are larger than those are used. In the above, thin-walled steel pipes are mostly used for pipelines. Thick-walled steel pipes are mostly used for blanks of hollow parts. Use on pressure and important pipelines.