... high quality control system 2013 U steel bend tube for furniture frame Production Description Haiyan Hongtai Metal Products ... :Zinc , powder coat, hot-dip galvanized,blackening, electroplate…3) machining Process:Stamping , turning,tube bending, welding, milling, CNC lathe… ... Europe and other countries and regions. 6. Quality management systems - Requirements: ISO 9001:2008 .Welcome to contact us ...