Heat ExchangerChina DIN17175 St35.8 Seamless Tube, Carbon Steel Pipe, Boiler Tube, Smls Pipe, Find details about China ASTM A192 Carbon Steel Pipe, API 5L Gr. B Seamless Pipe from DIN17175 St35.8 Seamless Tube, Carbon Steel Pipe, Boiler Tube, Smls Pipe