... Standard: ASTM,AISI,DIN,JIS,GB stainless steel tube/pipe/fitting1.Standard:GB,JIS,DIN,ASTM A312,ASTMA269,ASTM268/ ... pressure fluid transportation pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. Chemistry industry ... -drawn or cold-rolled;2) Surface finish: pickling, annealing, manual polish and mechanical polish3) Chemical and Physical characteristic: durable, corrosion ...