Galvanized Square Hollow Section

Made through controlled, product-relevant stages.

Hot Dip Galvanized Square Hollow Sections are manufactured from high-quality mild steel and coated through the hot-dip galvanizing process, where the steel is immersed in molten zinc to create a protective layer. This coating provides excellent corrosion resistance, long-lasting durability, and enhanced strength, making the sections suitable for harsh weather and outdoor environments. With precise dimensions, smooth finish, and strong structural performance, these hollow sections are ideal for applications requiring both strength and rust protection.

1. 08
   Tube Mill

   In the tube mill section, slit steel strips are gradually formed into round, square, or rectangular tubular shapes using advanced forming rolls and automated machinery. The open edges of the formed sections are welded continuously using the Electric Resistance Welding (ERW) process, which produces strong, uniform, and reliable weld joints. The tube mill operation is carefully controlled to maintain dimensional accuracy, structural integrity, smooth weld finish, and superior mechanical performance of the finished pipes and tubes.

2. 10
   Degreasing

   The tubes are subjected to a degreasing process to remove oil, grease, dirt, lubricants, and other surface contaminants accumulated during manufacturing operations. Specialized cleaning solutions and surface treatment methods are used to achieve a clean and contamination-free surface. Proper degreasing is essential for ensuring effective chemical treatment and coating adhesion in subsequent pickling and galvanizing processes.

3. 11
   Pickling

   In the pickling stage, the tubes are immersed in controlled acidic solutions to remove rust, mill scale, oxidation, and other impurities from the steel surface. This chemical cleaning process produces a clean metallic surface that enhances coating adhesion and improves the overall quality of galvanizing. Proper pickling also helps in achieving uniform surface finish and long-term corrosion resistance.

4. 12
   Fluxing

   Following pickling, the tubes undergo a fluxing process where a specialized flux solution is applied to the cleaned steel surface. The flux coating prevents oxidation before galvanizing and promotes proper bonding between the steel substrate and molten zinc during the galvanizing process. This stage plays a vital role in ensuring uniform zinc coating thickness and improved corrosion protection.

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   Hot Dip Galvanizing

   The prepared tubes are immersed in a bath of molten zinc during the hot dip galvanizing process, forming a protective metallurgical bond on the steel surface. The zinc coating provides excellent resistance against corrosion, moisture, oxidation, and harsh environmental conditions. Hot dip galvanizing significantly enhances the durability, service life, and maintenance performance of the pipes and tubes used in industrial, structural, agricultural, and infrastructure applications.

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   Quenching & Inspection

   After galvanizing, the tubes are rapidly cooled through quenching to stabilize the zinc coating and improve surface finish. The galvanized products then undergo detailed inspection and quality verification processes, including coating thickness measurement, dimensional inspection, surface finish evaluation, and visual quality checks. This ensures that every product complies with defined quality standards and customer specifications before dispatch.

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   Finishing & Packaging

   The finished pipes and tubes are carefully bundled, packed, labeled, and secured using suitable packaging methods to prevent physical damage, moisture exposure, and handling defects during storage and transportation. Proper packaging ensures safe delivery, efficient inventory management, and product protection throughout the supply chain until final dispatch to customers.