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What is the HDG ERW Square and rectangular hollow section?

RHS and SHStube are a welded structural grade tubing,depending on its size and wall thickness. Either grade is ideal for all structural applications, general fabrication, manufacturing and repairs.

Square hollow section is widely used in industrial maintenance, agricultural implements, transportation equipment, truck beds, trailers, frames, etc. Its box-shape configuration allows for much greater strength and rigidity compared to angles or channels.

This steel shape is easy to weld, cut, form and machine with the proper equipment and knowledge. Metals Depot stocks hundreds of sizes of square tube at wholesale prices in ready to ship precut and mill lengths or you can order just what you need custom Cut to Size in any quantity.

• Specification of square hollow sectionwe can supply

• Specification of Rectangular hollow sectionwe can supply

How to produce HDG SHS and RHS tubing?

Hot-dip galvanizingis a form of galvanization. It is the process of coating iron or steel with a thin zinc layer, by passing the steel through a molten bath of zinc at a temperature of around 860 °F (460 °C).

When exposed to the atmosphere, pure zinc reacts with oxygen to form zinc oxide, which further reacts with carbon dioxide to form zinc carbonate, a dull grey, fairly strong material that stops further corrosion in many circumstances, protecting the steel below from the elements. The process of hot-dip galvanizing results in a metallurgical bond between zinc and steel with a series of distinct iron-zinc alloys.

What can we do with hot dipped square & rectangular tube?

Hot dipped galvanized rectangular hollow section is widely used all over the world,and we mainly used this square tube in these indusrty area,such as:

        • Glass curtain wall;

        • power tower;

        • communication grid;

        • water and gas transmission;

        • wire casing;

        • houses;

        • bridges;

        • metal structures;

Our company covers an area of 48,800 square meters and we are specialized in exporting.We have ISO:9001,14001,18001 certifications and SGS,APIcertifications.Presently we have four production lines,260 staff and 36 senior engineers,which make our product capacity reaches 100,000 tons.Since our company was founded, we have won national qualified products, quality entrusted unit, model unit, and China Enterprise Credit Association AAA Grade Credit Enterprise.