tin wall galvanized steel pipe 1.Material:Q195;Q235;Q345,16Mn,API5L,etc 2.Sizes: ... :0.4-20MM,OD:12.7-2820MM tin wall galvanized steel pipe1.Material Q195;Q235;Q345=16Mn,API5L(GRB,X42,X52 ... Quality,Cheap Price and Fast Delivery.Types:Hot Dipped Galvanized Steel Pipe,Pre-galvanized Steel Pipe and Galvanized Steel Strip Pipe.