Applications and Classification of Special-Shaped Steel Tubes

Applications

Special-shaped seamless steel pipes refer collectively to seamless steel pipes with cross-sectional shapes other than circular. Special-shaped seamless steel pipes are extensively used in various structural components, tools, and mechanical parts. Compared to round pipes, Special-shaped pipes generally possess larger moment of inertia and section modulus, offering greater resistance to bending and torsion. They better accommodate specific usage conditions, significantly reduce structural weight, conserve steel resources, and enhance labor productivity in component manufacturing. Consequently, they find widespread application in aviation, automotive, shipbuilding, mining machinery, agricultural machinery, construction, light industry and textiles, as well as boiler manufacturing.

Classification

By shape:

Hexagonal-outer-round-inner steel pipes, round-outer-hexagonal-inner steel pipes, hexagonal-outer-hexagonal-inner steel pipes, flat-oval steel pipes, oval steel pipes, triangular pipes, L-shaped steel pipes, octagonal pipes, mushroom-shaped pipes, bread-shaped pipes, D-shaped pipes, concave pipes, convex pipes, umbrella-shaped tubes, P-shaped tubes, ingot-shaped tubes, and other special-shaped steel tubes. The shapes of special-shaped steel tubes are produced according to customer requirements.

Based on differences in cross-sectional shape and dimensions, they can be further classified into:

- Special-shaped seamless steel tubes with uniform wall thickness.

- Special-shaped seamless steel tubes with non-uniform wall thickness.

- Special-shaped seamless steel tubes with variable diameter.

Special-Shaped Steel Tubes,Applications of special-shaped steel tubes,Classifications of special-shaped steel tubes

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The Difference Between H-Beams and I-Beams

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The Difference Between H-Beams and I-Beams

Special-shaped seamless steel tubes are widely used in various structural components, tools, and mechanical parts. Compared to round tubes, non-circular tubes generally possess larger moment of inertia and section modulus, offering greater resistance to bending and torsion. This significantly reduces structural weight and conserves steel resources.

2025

09-15

ShanSteel Group Successfully Develops European Standard Light-Thin Series H-Beams

Shandong Steel's Steel Section Plant has recently successfully developed a series of thin and light H-shaped steels that meet European standards, including HE180AA, IPE240A, IPE270A, and IPE300A, and successfully achieved a one-time trial production on its medium-sized production line.

2025

09-10

Serbian President Aleksandar Vučić met with Liu Jian, Chairman of HBIS Group.

Serbian President Aleksandar Vučić met with Liu Jian, Chairman of HBIS Group, in Beijing. Both sides highly commended the achievements of HBIS Group’s investment and cooperation in Serbia, and focused their discussions on establishing a China-Serbia joint laboratory and future development plans.

2025

09-09

Yangtze Steel has been awarded the "Annual Five-Star Merchant"certification plaque by Alibaba International Station.

With its outstanding strength and high-quality services, Yangtze Steel won the highest honor of "Annual Five-Star Merchant" from Alibaba International Station.

2025

09-03

The 2025 Cold-Rolled Sheet/Strip Technology Exchange Conference Concludes Successfully

The 2025 Cold Rolling Sheet Metal Technology Exchange Conference was successfully held, focusing on green intelligent manufacturing and lubrication technology innovation, and promoting the efficient and high-quality development of the industry.

2025

08-25

The Difference Between H-Beams and I-Beams

There are significant differences between H-shaped steel and I-shaped steel in cross-sectional shape, mechanical properties and applicable scope. H-shaped steel is more widely used in modern steel structure buildings due to its better economy and structural efficiency.

2025

08-21

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