Pipes for pipeline applications: Steel pipes can serve as conveyance pipelines for liquids, gases, and solids. Examples include seamless pipes for water, gas, and steam pipelines, as well as pipes for oil transportation and main pipelines for oil and natural gas transmission.

Used as structural members: Given that steel pipes have a larger section modulus under the same weight, they possess greater bending and torsional resistance. Therefore, they are frequently employed as structural members.

Hot - dip galvanized steel pipes: These are mainly used for conveying gases and heating. In gas systems and greenhouses, the iron pipes used for heating are also galvanized pipes.