Products

Zhongtian is a professional manufacturer and supplier in China, specializing in Longitudinal Welded Steel Pipes. Our products use hot-rolled steel strips as raw materials and are manufactured using high-frequency resistance welding technology. Each pipe has only one longitudinal weld seam, with wall thickness tolerance controllable to ±0.2 mm. They boast high dimensional accuracy and excellent mechanical properties, and are widely used in municipal engineering, building structures, energy, and industrial manufacturing. Leveraging our own factory's comprehensive quality control system and mature export experience, we can provide cost-effective, corrosion-resistant customized pipe solutions to fully meet the needs of various engineering projects worldwide.

Zhongtian Thin Wall Longitudinal Welded Steel Pipe is made from hot-rolled/cold-rolled strip steel and steel plate, using continuous roll forming combined with high-frequency resistance welding (ERW) technology. It is a lightweight pipe. The product has a wall thickness of 1.0–6 mm, an outer diameter of Φ20–Φ610 mm, and materials ranging from Q195 to Q355B, conforming to standards such as GB/T 3091, GB/T 13793, and ASTM A53. This product is lightweight, has high dimensional accuracy, and its procurement cost is 15%–25% lower than seamless steel pipes. It is widely used in low-pressure fluid transportation and light structural engineering. As a leading supplier in China, Zhongtian relies on its comprehensive quality control system and mature project experience to continuously provide customers with stable and reliable products.

Zhongtian Thick Wall Longitudinal Welded Steel Pipe refers to pipes with a wall thickness ≥ 8 mm (mainstream products ≥ 15 mm), made by longitudinally rolling and welding steel plates. As a professional product supplier and manufacturer in China, Zhongtian is equipped with a modern production plant, focusing on two core production processes: double-sided submerged arc welding (LSAW) and high-frequency resistance welding (ERW).

Rectangular and square steel tubes, commonly known as square or rectangular tubes, are hollow steel profiles with square or rectangular cross-sections. Chinese manufacturer ZHONGTIAN produces these products using cold bending, high-frequency welding, or round-to-square conversion processes. The mainstream materials are Q235B and Q355B, and the products conform to national standards such as GB/T 6728. These products offer excellent rigidity, easy installation, and outstanding cost-effectiveness, and are widely used in construction, machinery, photovoltaic, and municipal engineering. As a trusted supplier, ZHONGTIAN leverages its own modern factory to provide high-quality square and square steel tubes to customers worldwide.

ZHONGTIAN Dual Wing Expandable Prefabricated House is a modern modular building solution featuring an expandable side-wing structure that transforms a compact unit into a larger functional space. By combining factory manufacturing with flexible spatial design, ZHONGTIAN provides adaptable building solutions for projects requiring both efficiency and better space experience.

ZHONGTIAN Quick Foldable Prefabricated House is a modular building solution created for projects that require flexible space, shorter construction cycles, and easier relocation. Different from conventional buildings that depend heavily on on-site construction, this product completes the main manufacturing process in the factory and transforms into a functional space through a simple expansion process.