1.seamless steel pipe ,Boiler pipe 2.OD:20mm--820mm, 1/2"--32" 3.Steel Grade:20,20G,A179,A106 B,A192 ... Manufacture and exporterproduct NameBoiler seamless steel pipeSpecification Range20mm-820mm 1/2"- 32"Steel Grade20,20G,A 179,A106 B,A192,st37 ... A192,DIN 1629-1984,DIN 17175,BS3059.1-1987Application:structure steel pipe,boiler pipe,petroleum,gas.Our quality policy:Facilitating quality,Servicing honesty ...