... outere diameter:6mm-8 Stainless steel pipe1.steel pipe, welded pipe2.steel tube3.thickness:1mm-40mm4.outere diameter:6mm ... Series, 300 Series, 400 Series, etc.01) Commodity name: welded stainless steel pipe/ tube heat exchanger tube / boiler tube / ... steel tubing /stainless steel boiler tube / stainless steel tubes / welded stainless steel pipe / stainless steel pipes / stainless pipes /stainless ...