Industrial hot-dip galvanizing for structural steel, crash barriers, pipes, poles, and fabricated components. IS 2629 / IS 4759 / EN ISO 1461 certified. Plant in Karad, Satara, Maharashtra — Pan-India logistics.
W-Beam, Thrie-Beam rails, posts, spacer blocks
Angles, channels, beams, columns, trusses
MS pipes, hollow sections, circular tubes
Street light poles, highway poles, telecom poles
Tower members, cross arms, clamps, brackets
Custom fabricated steel structures and assemblies
Steel gratings, hand railings, safety barriers
Bolts, nuts, anchor bolts, fasteners in bulk
Oil, grease, and organic contaminants removed in alkaline bath
Rust and mill scale removed in hydrochloric acid bath
Zinc ammonium chloride flux applied to clean steel surface
Steel immersed in 450°C molten zinc — metallurgical bond formed
Freshly galvanized steel cooled in water quench tank
Coating thickness checked per IS 2629 — test certificate issued
| Hot-Dip Galvanizing Specifications | |
|---|---|
| Process Temperature | 448–455°C (molten zinc bath) |
| Minimum Coating Thickness | 85 microns (for crash barriers & structural steel) |
| Coating Mass | 600 g/m² (both sides) |
| Indian Standard | IS 2629:2021 / IS 4759 |
| International Standard | EN ISO 1461 / ASTM A123 |
| Zinc Purity | SHG Zinc — 99.95% purity |
| Expected Coating Life | 25–50 years in Indian climate conditions |
| Test Certificate | Provided for every batch |
| Maximum Component Size | Contact us for current bath dimensions |
Hot-dip galvanizing creates a metallurgical bond between zinc and steel — not just a surface coating like paint. The zinc-iron alloy layers provide cathodic protection, meaning even scratches or cut edges are protected. Galvanized steel offers 25–50 years of corrosion protection vs. 5–10 years for paint in Indian highway conditions. That's why MORTH mandates hot-dip galvanizing for crash barriers on national highways.
Our standard coating for crash barriers and highway structural components is 85 microns (600 g/m²) as required by IS 2629 and MORTH specifications. We can also achieve thicker coatings (100+ microns) for marine or industrial environments. A DFT (Dry Film Thickness) test certificate is provided for every batch.
Yes. DG Group accepts job-work galvanizing where customers bring their steel fabrications to our Karad plant for galvanizing. We process crash barriers, structural steel, poles, pipes, and custom fabrications. Contact sales@dggroupcompanies.com for job-work pricing and scheduling.
Our galvanizing plant is located in Karad on NH48, enabling delivery to Maharashtra, Karnataka, Goa, Telangana, Gujarat, and all other states. We handle logistics for bulk orders. Contact us for transportation quotation based on your delivery location.
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