... Standard: ASTM,AISI,DIN,JIS,GB stainless steel tube/pipe/fitting1.Standard:GB,JIS,DIN,ASTM A312,ASTMA269,ASTM268 ... 1/4",1 1/2",2",2 1/2",3",3 1/2",4",5",6",8",10",12", ... and middle pressure fluid transportation pipeline 2. Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. Chemistry ... -- several tubes are bundled in one plastic weaving bag 3. Marking: Base on your requirments 4. As your ...