Thick-walled steel pipes, the steel pipe whose outer diameter to wall thickness ratio is less than 20 is called thick-walled steel pipe. Mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industry, boiler pipes, bearing pipes and high-precision structural pipes for automobiles, tractors, and aviation.

The biggest difference between thick-walled steel pipes and thin-walled steel pipes lies in the thickness of the steel pipe wall. Generally speaking, thin-walled steel pipes are cold-drawn technology, while thick-walled steel pipes generally use hot-rolled technology. If it is distinguished by measurement units, then, 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, thin-walled steel pipes with wall thickness/pipe diameter less than 0.05 and thick-walled steel pipes are used. In terms of application, thin-walled steel pipes are mostly used. On the pipeline. Thick-walled steel pipes are mostly used for blanks of hollow parts. Use on pressure and important pipelines.

Uses: Thick-walled steel pipes are mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. Used for liquid transportation: water supply and drainage. For gas transportation: coal gas, steam, liquefied petroleum gas. For structural purposes: as piling pipes and bridges; piers, roads, building structures, etc.