Welded steel pipe is mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, city construction. Used for liquid delivery: water supply, drainage. The gas transportation: gas, vapor, liquefied petroleum gas. For structural purposes: as piling pipe, bridge; tube for pier, road, building structure. Out Diameter Wall Thickness Length Inch mm mm meter 1-1/4" 42.3mm 1.0mm-4.0mm 0.3m-12m 1-1/2" 48.3mm 1.0mm-4.0mm 0.3m-12m 2" 60.3mm 1.5mm-4.0mm 0.3m-12m 2-1/2" 76.1mm 1.5mm-4.0mm 0.3m-12m 3" 88.9mm 1.5mm-9.5mm 0.3m-12m 4" 114.3mm 2.0mm-9.5mm 0.3m-12m 5" 141.3mm 3.0mm-9.5mm 0.3m-12m Main Specification Outer diameter 42.3mm-141.3mm or custom-made Wall thickness 1.0-9.5mm Length 5.8M for 20'gp,11.8M for 40'gp or as custom-made Finish Hot Dipped Galvanized; Electro Galvanized; Black Painted. Standard BS1139,BS EN10255:2004; JIS G3444: 2004, GB/T3091 www.bnbmg.com.cn Welded Steel Pipe