... : 60-400 g/m2 (pre-galvanized steel pipe , galvanized layer 60-80g/m2;hot dipped galvanized ,galvanized layer:250-400g/m2)4) Use ... : Used for low pressure liquids delivery, such as water, gas, and oil5) Packing: Hexagonal ... Steel,Q195,Q215,Q235,A53,St37StandardASTM/ BS/ GBSurfaceHot dip Galvanized,Zin 250 to 400 g/m2.pre galvanization ,Zinc:60 ...