Galvanised (GI)
/glossary/galvanisedSteel pipe coated with zinc layer for corrosion resistance in outdoor and wet environments.
In detail
Galvanised Iron (GI) pipe is steel pipe with a protective zinc coating applied by hot-dip galvanizing (HDG) per IS 4736 or IS 1239 Part 2. The zinc layer (typically 60-600 g/m²) provides sacrificial corrosion protection, extending service life 5-10 times compared to black steel in outdoor, wet, or saline environments. GI pipes are specified for water plumbing, fencing, borewell casing in saline zones, and outdoor structural applications. Internal zinc can affect potable water quality in some pH conditions.
Where you'll meet this in procurement
You will meet Galvanised (GI) when choosing process route and product family. Match Galvanised (GI) to pressure, temperature, corrosion duty, and standard (IS, ASTM, ASME, or API) so the mill route and documentation line up with the application.