1. Prior to the galvanization process, the steel pipes undergo a rigorous surface preparation phase. This involves a sequence of meticulous steps to ensure proper galvanization of the steel. The typical sequence for the surface preparation of galvanized steel pipes is as follows:
2. To begin, the steel undergoes thorough cleaning using a potent caustic solution. This highly effective corrosive agent completely eliminates any traces of grease, dirt, and oil from the surface.
3. Following the caustic solution rinse, the steel pipe undergoes pickling, a surface treatment that eliminates contaminants, rust, scales, stains, and impurities from the surface. An acidic solution is employed to pickle the tube, removing mill scales and remnants of hot-rolled steel in the form of flakes.
4. Subsequently, the solution is removed, and zinc ammonium chloride is applied to the tube to prevent surface oxidation.
5. The steel pipes are now prepared for galvanization. They are immersed in a bath of molten zinc at a high temperature, typically around 449 degrees Celsius or 840 degrees Fahrenheit. This results in the formation of a robust zinc layer on the steel surface, creating a barrier against oxygen and water contact. This, in turn, prevents rust formation and enhances corrosion resistance. The zinc acts as a sacrificial anode, safeguarding the underlying steel layers.
6. In some cases, manufacturers introduce lead into the molten zinc to enhance its fluidity and prevent excess zinc from coating the pipe. Notably, lead also hinders the formation of dross.
7. While a few manufacturers opt for cold-dipped galvanizing, involving coating pipes in paint with a high zinc content, the prevailing and widely adopted method is hot-dipped galvanizing.
8. After the steel pipe is immersed in zinc, a cooling period is essential before the newly galvanized pipes reach ambient temperature. A quench tank facilitates rapid cooling, safeguarding the pipes from undesired exposure to environmental factors that could diminish their lifespan.
9. The final step involves thorough inspection. At HMT Steel, stringent inspections are conducted on all galvanized steel tubes. These inspections identify any cracks or irregularities that could impact the tubes’ quality and appearance. The tubes undergo multiple rounds of safety and quality checks, ensuring their readiness for immediate use post-dispatch.

1. Elevated durability and strength – HMT Unique structural steel tubes boast a 400 YST rating, positioning these hollow steel sections as the market’s most exceptional offerings. Customers receive unmatched value through enhanced durability and strength from these superior products.
2. Resistance to corrosion – Corrosion can mar the appearance and compromise the structural integrity of steel tubes. HMT Unique structural steel tubes are equipped with a 150 GSM zinc coating, rendering them both corrosion-resistant and aesthetically pleasing.
3. Exceptional design for unparalleled strength – Introducing designer galvanized tubes, HMT Steel pioneers a first in India with its Unique Tubes. Beyond an appealing premium surface, these structural steel tubes from HMT also exhibit unparalleled strength and extended longevity. Serving as a wood substitute, HMT Unique ensures reliable performance, outshining wood in both quality and aesthetics.
4. Aesthetics pleasing to the beholder – Careful corner welding imparts a smooth and uniform finish to HMT Unique steel tubes, ensuring that aesthetics remain uncompromised. This results in a futuristic design marked by corrugated strength.
5. Striking design patterns on each tube – The intricate designs adorning HMT Unique ERW steel tubes do more than enhance their appearance; they also contribute to heightened strength and robustness.
6. Expedited erection process – These attractive galvanized steel pipes are ready for immediate use post-dispatch. The reduced need for on-site surface preparation and painting significantly accelerates structure completion and installation.
7. Reduced maintenance and long-term costs – Thanks to their enhanced durability and quality, galvanized steel tubes, like HMT Unique, incur notably lower long-term costs compared to alternative coating options. Reduced maintenance requirements further contribute to cost efficiency.
8. Comprehensive protection – The zinc coating on HMT Unique galvanized steel pipes not only provides a sleek finish but also safeguards the tubes from imperfections such as white deposits, flux, ash inclusions, dross inclusions, black spots, and rust, ensuring all-around protection.
9. Environmentally conscious – Crafted from steel, HMT Unique steel tubes present an eco-friendlier alternative to wood, as no trees are felled in their production. While conventional materials like RCC concrete and aluminum have been linked to environmental concerns, these recyclable ERW tubes from HMT Steel are not only environmentally friendly but also represent the sustainable future of construction.

1. Gate Pillars/Posts: HMT Unique ERW steel tubes are harnessed to craft exquisitely designed door pillars that exude opulence in your dwelling. These gate pillars boast elegance, showcasing precision craftsmanship and decorative finesse that aligns seamlessly with your aesthetic preferences.
2. Entry Gates: The revitalized structural steel featured in HMT Unique steel tubes imparts an upscale element to home entry gates. Tailored to cater to a diverse range of design inclinations, these ERW steel tubes epitomize versatility and style.
3. Verandas: A captivating veranda enhances a home’s charm and provides a serene spot for fresh air. HMT Unique structural steel tubes are aesthetically curated to add an extra touch of grace and allure to residential verandas.
4. Rooftop Structures: HMT Unique structural steel tubes are meticulously crafted to capture attention. Redefining traditional steel design, they bestow rooftops with an air of sophistication and refinement.
5. Furnishings: The inherent beauty and unmatched structural robustness of these ERW steel tubes render them ideal for diverse furniture applications, elevating the aesthetics and functionality of various furnishings.

HMT Steel is your ultimate choice for all steel structures, PEB structures, structural steel buildings, and construction needs.