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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsOil Refinery Co...Oil Refinery Co...Severe erosion problem in oil sand upgrading processSevere erosion problem in oil sand upgrading process
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7/25/2007 9:00 AM
 
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Hello, I am working in upgrading department in an oil sand company, Canada. Recently we have frequent failures on thermowells, control valves, furnace outlet elbows and pumps due to erosion or erosion-corrosion problem. The mineral (sand, clay, etc.) content in the bitumen is less than 1 wt%, the operating temperature is about 650 F. The materials of the failed components include carbon steel, 5 Cr, 9 Cr, 316/317 SS. We even tried Stellite coating, WC coating for thermowells, but it still did not work very well. Here I would like to have your opinion on material upgrading for better erosion resistance. Any of your help is highly appreciated. Regards, Haixia
 
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7/25/2007 9:00 AM
 
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This generic failure well needs a specific RCA. The type and characteristics of mineral in the flow and flow phases and velocity needs to be seen and compared w.r.t. designed one. It is to be borne in mind that definitely all your failed MOC is definitely as per some standard design under licensing. Now if it is failing in general there are definitely something wrong going into your system definition. rather simply before going to upgrade or underestimate your prevailing MOC, let us first look deep into the root causes w.r.t. process and actual condition. let us contribute here, sirs.
 
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7/29/2007 9:00 AM
 
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For such severe erosion-corrosion application you can try coating with Tungten Carbide using thermal spary method to avoid cracking tendancy. Kennametal is a specialist in those application. regards,
 
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