GI (Galvanized Iron) Pipe, widely used for plumbing systems, is a carbon steel pipe coated with a protective zinc layer through hot-dip galvanization, offering exceptional corrosion resistance and durability in water supply and drainage applications. Designed to meet standards like ASTM A53 or BS 1387, these pipes feature outer diameters ranging from 15mm to 150mm and wall thicknesses of 1.2mm-4.5mm, ensuring reliable performance under varying pressures. The zinc coating (200-600g/m²) prevents rust, extending service life up to 50 years in indoor plumbing, while threaded ends simplify installation with fittings.