... supplier Standard: ASTM,AISI,DIN,JIS,GB stainless steel tube/pipe/fitting1.Standard:GB,JIS,DIN,ASTM A312,ASTMA269,ASTM268/268M2 ... middle pressure fluid transportation pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. Chemistry industry 6 ... .xindayu.com http://xindayu.en.alibaba.com ISO AISI A554 SS tube pipe fitting profile