Ring jointed welding neck flange We manufacture and export various flanges conform to international standards. Product name,Ring jointed welding neck flange, Size,1/2"-24", Nominal pressure,0.25mpa--25mpa, Material,F316/f304/f316l/f304l/a105 /f5/f11/f22, ,15crmo, 12crmov, q235, 16mn, 20# Sea worthy package
