... 2.0mm Stamping galvanized steel pipe for Poultry feeding systems Our company was established in 1999, mainly produces high - frequency welding ... and stamping steel pipe, stamping steel tube is mainly used in Poultry feeding systems:Standard: GB, DIN, ASTM.Certification: SGS, ISO9001Surface ... , 4.05M, 6.07M or according customer request.Place of Origin: QINGDAO, CHINA.Supply Ability: 800tons/month.