... : ASTM,AISI,DIN,JIS,GB stainless steel tube/pipe/fitting1.Standard:GB,JIS,DIN,ASTM A312,ASTMA269,ASTM268 ... fluid transportation pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. Chemistry industry 6. ... : pickling, annealing, manual polish and mechanical polish3) Chemical and Physical characteristic: durable, corrosion resistant and high-temperature resistant4) We also ...