1.Material of steel plate: Q235 steel plate 2.Thickness of steel plate:1.5mm-8mm 3.Shape: Round, Half, Arch,Oval ect. 4 Assembly:Annular flanged/Nestable 5 .Depth of fill: 1.5-60m 6.Pipe Diameter: 300mm-9000mm 7.Corrugation: 68*13,150*50,200*55, 380*140,300*110 ,400*150 8.Antiseptic treatment: hot dip galvanized zinc Y610g/m2. 9.Service life more than 70 years. 10:.Standard: JTT 791-2010 ,or AASHTO M36. tray
