| abstract |
1/1 summary “Alumina-formed bimetallic pipe for refinery process furnaces and method of production and use” A bimetallic pipe is provided for transporting hydrocarbon feedstock stocks in refinery process furnaces, and more particularly in radiant kiln coils including: (i) an outer tube layer being formed of stainless steels including chromium in the range 15.0 to 26.0% by weight based on the total weight of stainless steel; (ii) a tube layer being formed of an alumina-forming bulk alloy, including 5.0 to 10.0 wt% of aluminum, 20.0 wt% to 25 wt% of cr, less than 0.4 wt% of itself, and at least 35.0% by weight of fe, with the remainder being ni, wherein the inner tube layer is formed by welding of alumina bulk alloy plasma powder onto the inner surface of the tube layer. and iii) an oxide layer formed on the surface of the inner tube layer, wherein the Oxide is substantially comprised of alumina, chromium oxide, silica, mullite, spinel, or mixtures thereof. Also provided are methods of producing and using the bimetallic pipe. |