... quality:Q195, Q235,Q345 Black pipe processing cycle: Hot Dipped Galvanized Pipe Proceed FlowBlack Pipe Examination→Acid Washing→Water Washing→ ... Examination StorageGalvanizing Line:Features:1.Hot rolled or cold drawn or precision steel pipes/tubes are avalible here2. ... petro-chemical ,ship,structure pipe,automobile,shock absorber,building,geology,fluid tubes,line pipe etc4.High quality:ISO9001 API5L ...