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, A, FEATHER, JAMES, E
• Format: Patent
• Language: English; French
• Published: 18.04.2013
• Subjects: ALLOYS; BLASTING; CASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; 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; FERROUS OR NON-FERROUS ALLOYS; FUELS; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; 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; KILNS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; LUBRICANTS; MACHINE TOOLS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL WAXES; OPEN SINTERING OR LIKE APPARATUS; OVENS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PIPES; POWDER METALLURGY; 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; RETORTS; 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; THEIR RELEVANT APPARATUS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS; WELDING; WORKING BY LASER BEAM; WORKING METALLIC POWDER

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. La présente invention se rapporte à un tube bimétallique pour le transport des charges d'hydrocarbures dans des fours de raffinerie, et plus particulièrement, dans des serpentins radiants de fours, ledit tube comprenant : i) une couche de tube externe qui est formée à partir d'aciers inoxydables comportant une quantité de chrome comprise entre 15,0 et 26,0 % en poids par rapport au poids total de l'acier inoxydable ; ii) une couche de tube interne qui est formée à partir d'un alliage alumino-formeur massif comportant une quantité d'aluminium (Al) comprise entre 5,0 et 10,0 % en poids, une quantité de chrome (Cr) comprise entre 20,0 et 25 % en poids, une quantité de silicium (Si) inférieure à 0,4 % en poids et au moins 35,0 % en poids de fer (Fe), le reste étant du nickel (Ni), la couche interne du tube étant formée au moyen d'un soudage plasma-poudre de l'alliage alumino-formeur massif sur la surface interne de la couche externe du tube ; et iii) une couche d'oxyde formée sur la surface de la couche interne du tube, la couche d'oxyde étant sensiblement composée d'alumine, d'oxyde de chrome, de silice, de mullite, de spinelles ou de mélanges de ces derniers éléments. La présente invention se rapporte également à des procédés de fabrication et d'utilisation du tube bimétallique.