Detailed Product Description galvanized tubeHot dipped galvanized steel tube Spec:Q195,Q215,Q235,Q345,ST37.4, ST35, ST45, ST52, ... ,BS1387, Gr.A/B Hot dipped galvanized steel tube according to BS1139Carbon seamless welded steel tube according to ASTM A53/A106/APL5L Gr.B ... internal and external surfaces of the pipes to form a layer of zinc, which is purified at last. The water supply ...