1, Galvanized steel pipes(ERW) 2, Dimension: 21.3-323mm 3, material ... 60-400 g/m2 (pre-galvanized steel pipe , galvanized layer 60-80g/m2;hot dipped galvanized ,galvanized layer:250-400g/m2)4) ... ,Q195,Q215,Q235,A53,St37StandardASTM/ BS/ GBSurfaceHot dip Galvanized,Zin 250 to 400 g/m2.pre galvanization ,Zinc ... Ability20000 metric tons per monthShipmentContainer or bulk Galvanized steel pipes