... 2) surface treatment: galvanized Hot Dipped Galvanized Pipe Proceed FlowBlack Pipe Examination→Acid Washing→Water Washing→Solvent Coating→Linning→ ... machines,petro-chemical ,ship,structure pipe,automobile,shock absorber,building,geology,fluid tubes,line pipe etc4.High quality:ISO9001 API5L ... we have CNC lathe and other equipment7.Others:painting,caps,beveled edges,marking,tread and so on according to ...