... used to manufacture water-wall tubes,boiling water pipe, tube, boiler superheated steam locomotive with the superheated steam pipe, ... high pressure and ultrahigh pressure boiler superheater and reheater tube tube, airway, main steam pipe, etc.If need , pls contact to ... high pressure and ultrahigh pressure boiler superheater and reheater tube tube, airway, main steam pipe, etc.If need , pls contact to ...