... material etc 5. used for cylinder etc 304 erw steel pipes A: Round pipe diameter: 20-185MM, thickness: 1.5-15MM.B: Surface ... finish: black, blank, bright and galvanized, or painted C: ... DIN17175, JIS G3452, EN10210, EN10219, EN10025, EN10305 etcTo date, more and more clients, ranging from China to Oceania, Japan, Korea, Southeast ...