... pipe Surface finish:Hot dipped galvanized Standard:GB/T3091-2001,BS138 Out Diameter: 10. ... -1985, DIN EN10025, EN10219, ASTM SCH40, ASTM SCH80\Surface Finish: hot dipped galvanized, electro galvanized, blackOut DiameterWall ThicknessLengthInchmmmmmeter1/2"21.3mm0 ... 19mm-100mm and thickness 1mm-2.3mm are also available. Hot dipped galvanized pipe