Galvanized Iron Pipes(GI) These pipes are widely used for conveying raw water & distribution of treated water in majority of rural water supply schemes, where the requirement of water is less. Mostly medium quality GI pipes are used. These pipes are cheap, light in weight and easy to handle & transport & easy to join. Their sizes vary from 15mm to 150mm. These pipes are manufactured conforming to IS-1239 (pt-I) 1990. Generally screwed & socketed pipes are used. Dimensions & Nominal Mass of Medium Quality Steel Tubes as per IS 1239. Nominal Bore Outside Diameter in Thickness mm in mm mm Maximum Minimum 15mm 20mm 25mm 32mm 40mm 50mm 65mm 80mm 100mm 125mm 150mm 21.8 27.3 34.2 42.9 48.8 60.8 76.6 89.5 115.0 140.8 166.50 21.0 26.5 33.3 42.0 47.90 59.7 75.3 88.0 113.10 138.5 163.90 2.6 2.6 3.2 3.2 3.2 3.6 3.6 4.0 4.5 4.8 4.80 in Mass of Screwed & Socketted tube.(kg/m) 1.22 1.57 2.43 3.13 3.60 5.10 6.54 8.53 12.50 16.40 19.50