Steel pipes are classified according to cross-sectional shape

Steel pipe products come in a wide variety of steel types and specifications, and their performance requirements are also diverse. All of these should be differentiated as user requirements or working conditions change. Usually, steel pipe products are classified according to cross-sectional shape, production method, pipe making material, connection method, coating characteristics and uses, etc.
Steel pipes can be divided into round steel pipes and special-shaped steel pipes according to their cross-sectional shapes.
Special-shaped steel pipes refer to various steel pipes with non-circular cross-sections.
According to the longitudinal section shape, steel pipes are divided into: constant section steel pipes and variable section steel pipes. Variable cross-section (or variable cross-section) steel pipes refer to steel pipes whose cross-sectional shape, internal and external diameters, and wall thickness change periodically or non-periodically along the length of the pipe. They mainly include: outer tapered tube, inner tapered tube, outer stepped tube, inner stepped tube, periodic section tube, corrugated tube, spiral tube, steel tube with radiator, and gun barrel with multiple lines.