Hot Dipped Galvanized Seamless Steel Pipe 1.Standard:ASTM A106,A53,GB/T8162,GB/T8163 ... :12-914mm 3.WT:2-60mm Hot Dipped Galvanized Seamless Steel Pipe1.Standard: ASTM A106,ASTM A53,EN10255,GB/T8162,GB ... bundles or according to your requirement. Hot Dipped Galvanized Seamless Steel Pipe