Durable Welded Steel Pipe for Reliable Industrial Applications

Black Rectangular and Square Steel Tube is an uncoated carbon steel hollow section produced through cold forming and high-frequency welding. With a square or rectangular profile, it provides excellent bending strength, torsional resistance, and fabrication flexibility. Unlike galvanized steel tube, it has no protective zinc coating, making it suitable for indoor structures, machinery frames, temporary constructions, and projects requiring further painting or galvanizing after fabrication. As a professional steel tube manufacturer and supplier in China, we provide customized sizes, steel grades, and processing services for construction, industrial equipment, and infrastructure applications worldwide.

Hot Dip Galvanized Rectangular and Square Steel Tube is a corrosion-resistant structural steel solution designed for outdoor construction, industrial equipment, solar mounting systems, and agricultural structures. Manufactured from Q235B and Q355B steel with a durable hot dip galvanized coating, it provides excellent strength, dimensional stability, and long-term protection against rust. ZHONGTIAN produces customized galvanized square and rectangular tubes with various sizes, wall thicknesses, and surface treatments to meet different engineering requirements worldwide.

Pre Galvanized Round Steel Pipe is manufactured from galvanized steel strips through high-frequency welding and forming processes. With a smooth surface, accurate dimensions, lightweight structure, and competitive cost, it is widely used for indoor construction, electrical conduit protection, greenhouse structures, decoration frames, and light-duty applications. ZHONGTIAN supplies customized pre galvanized pipes with different diameters, wall thicknesses, and surface requirements.

Thick Wall Hot Dip Galvanized Round Steel Pipe is a heavy-duty galvanized steel pipe designed for applications requiring high strength, pressure resistance, and long-term corrosion protection. Manufactured from Q235B or Q355B steel with a wall thickness of 3mm or above, it provides reliable performance for fire protection systems, municipal pipelines, industrial facilities, and structural projects.

Thin Wall Hot Dip Galvanized Round Steel Pipe is a lightweight galvanized steel tube designed for projects that require corrosion resistance, easy installation, and cost control. With a thin-wall structure and hot-dip galvanized surface protection, it provides a practical solution for greenhouse frames, electrical conduit protection, decorative structures, lightweight supports, and low-pressure piping systems. Manufactured by ZHONGTIAN using high-quality carbon steel materials such as Q195 and Q235B, these pipes combine good formability, stable dimensions, and long service life.

Small Diameter Hot Dip Galvanized Round Steel Pipe is a compact galvanized steel pipe mainly used for indoor water supply, fire protection branches, electrical conduit protection, HVAC systems, and light structural applications. Generally covering DN15 to DN80 sizes, it is manufactured from Q235B or Q195 carbon steel pipes and processed through hot dip galvanizing to create a durable zinc protective layer on both internal and external surfaces.