Detailed Product Description galvanized steel pipeSpec:Q195,Q215,Q235,Q345,ST37.4, ST35, ST45, ST52, ... ,APL5CT,BS1387, Gr.A/B Hot dipped galvanized steel tube according to BS1139Carbon seamless welded steel tube according to ASTM A53/A106/APL5L ... anticorrosion of outer wall relatively high. Hot dipped galvanized pipes are made of steel pipes which are picked with acid to remove ...