ALUMINA FORMING BIMETALLIC TUBE FOR REFINERY PROCESS FURNACES AND METHOD OF MAKING AND USING

• Main Authors: MCCRAY, VANCE, A, DEUTSCH, DAVID, SAMUEL, CHUN, CHANGMIN, RAICH, BRENDA, ANNE, FEATHER, JAMES, E
• Format: Patent
• Language: English; French
• Published: 17.10.2013
• Subjects: BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CRACKING HYDROCARBON OILS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; ENGINEERING ELEMENTS AND UNITS; FUELS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; JOINTS OR FITTINGS FOR PIPES; LIGHTING; LUBRICANTS; MACHINE TOOLS; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PIPES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; SOLDERING OR UNSOLDERING; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

Provided is a bimetallic tube for transport of hydrocarbon feedstocks in refinery process furnaces, and more particularly in furnace radiant coils, including: i) an outer tube layer being formed from stainless steels including chromium in the range of 15.0 to 26.0 wt.% based on the total weight of the stainless steel; ii) an inner tube layer being formed from an alumina forming bulk alloy including 5.0 to 10.0 wt.% of Al, 20.0 wt.% to 25.0 wt.% Cr, less than 0.4 wt.% Si, and at least 35.0 wt.% Fe with the balance being Ni, wherein the inner tube layer is formed plasma powder welding the alumina forming bulk alloy on the inner surface of the outer tube layer; and iii) an oxide layer formed on the surface of the inner tube layer, wherein the oxide layer is substantially comprised of alumina, chromia, silica, mullite, spinels, or mixtures thereof. Also provided are methods of making and using the bimetallic tube. L'invention concerne un tube bimétallique destiné au transport de charges d'alimentation d'hydrocarbures dans des fours à processus de raffinerie, et plus particulièrement dans des bobines rayonnantes de four, comportant : i) une couche extérieure de tube composée d'aciers inoxydables comportant du chrome dans la plage de 15,0 à 26,0 % en poids sur la base du poids total de l'acier inoxydable ; ii) une couche intérieure de tube composée d'un alliage en vrac de formation d'alumine comportant 5,0 à 10,0 % en poids de Al, 20,0 % en poids à 25,0 % en poids de Cr, moins de 0,4 % en poids de Si et au moins 35,0 % en poids de Fe, le complément étant du Ni, la couche intérieure du tube étant formée par soudage par plasma à la poudre de l'alliage en vrac de formation d'alumine sur la surface intérieure de la couche extérieure du tube ; et iii) une couche d'oxyde formée sur la surface de la couche intérieure du tube, la couche d'oxyde étant sensiblement composée d'alumine, d'oxyde de chrome, d'oxyde de silicium, de mullite, de spinelles, ou de leurs mélanges. L'invention concerne également des procédés de fabrication et d'utilisation du tube bimétallique.