... a leading manufacturer of steel pipe in Tianjin, China. We professionally produce carbon steel pipe, galvanized steel pipe, square & ... pipe in various grade and manage seamless pipe, angle steel, spiral pipe, according to international stander GB/T3091-2001 ... are considerably used to construction, oil/water/gas transportation, scaffolding, fencing, boiler, pipeline, etc.Angle SteelSize in inchSize ...