China hollow section tubes have competitive advantages in the global market

Today, China hollow section tubes have a large demand in the global steel pipe market because of a few competitive advantages. One aspect which is especially favorable for China hollow sections is the lower drag coefficients if they are exposed to wind or water forces. The internal void can be used in various ways, e.g. to increase the bearing resistance by filling with concrete or to provide fire protection. In addition, heating or ventilation systems sometimes make use of the hollow section columns. In construction projects, China hollow section tubes have many uses such as structural applications involved in residential, commercial and industrial construction. In particulars, as the flat square surface has the performance to ease construction, rectangular steel pipes are sometimes widely used for architectural aesthetics in exposed structures. 

Nowadays, welded hollow sections, also called welded steel pipe with a longitudinal weld are mainly made employing either electrical resistance welding processes or induction welding processes. Specifically speaking, a strip or plate is formed by rollers into a cylindrical shape and welded longitudinally. The edges are heated, e.g. by electrical resistance, then the rollers push the edges together, resulting in a pressure weld. The weld protrusion on the outside of the tube is trimmed immediately after welding. Square or rectangular hollow sections are sometimes made by forming a single strip to the required shape and closing it by a single weld, preferably in the middle of a face. 

In practical applications, round steel pipe and square steel pipe are often regarded as one of important building materials in the construction trade. When it comes to construction projects, steel tubes are used in many building types from small storage units to skyscrapers in big cities. For example, they are used to create the foundation of large buildings as well as other framework. Steel tubes are also used to construct balconies along with railing for staircases. As for their function with tools used for such projects, steel tubes can be seen in the scaffolding workers rely on to reach tall points of buildings. Although the manufacturing costs of hollow sections are higher than those for other sections, leading to higher unit material cost, economical applications are achieved in many fields. The application field covers all areas, e.g. architectural, civil, offshore, mechanical, chemical, aeronautical, transport, agriculture and other special fields. In construction projects, China hollow section tubes are very popular among any other structural steel pipes in use involved in residential, commercial and industrial construction. In particulars, as the flat square surface has the performance to ease construction, rectangular steel pipes are sometimes widely used for architectural aesthetics in exposed structures.