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97490 CORROSION OF REACTOR EFFLUENT AIR COOLERS

Picture for 97490 CORROSION OF REACTOR EFFLUENT AIR COOLERS
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Product Number: 51300-97490-SG
ISBN: 97490 1997 CP
Author: Anil Singh, Craig Harvey, R. L. Piehl
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Corrosion of reactor effluent air coolers (REACS) and associated piping has been a serious problem in hydrocracking end hydrofming plants tlom the time these processes were fust introduced to the industry. For the most part, the design and operating guidelines to control corrosion were formulated in the 1970s. This paper reports on a recent corrosion survey of 46 UOP licensed hydroprocessing units. The survey response represented more than 700 years of operating experience end covered a wide range of the REAC system designs, materials, operating environments, and corrosion experience. Results of the survey indicate that present corrosion control parameters in general use continue to be appropriate. However, the survey highlights other factors of geat importance and provides valuable information on how to achieve satisfactory REAC performance. Keywords: Hydroprocessing, hydrocracking, hydrotreating, reactor effluent air cooler, ammonium bisulfide, Kp, balanced and unbalanced headers, inlet and outlet piping, ferrules.
Corrosion of reactor effluent air coolers (REACS) and associated piping has been a serious problem in hydrocracking end hydrofming plants tlom the time these processes were fust introduced to the industry. For the most part, the design and operating guidelines to control corrosion were formulated in the 1970s. This paper reports on a recent corrosion survey of 46 UOP licensed hydroprocessing units. The survey response represented more than 700 years of operating experience end covered a wide range of the REAC system designs, materials, operating environments, and corrosion experience. Results of the survey indicate that present corrosion control parameters in general use continue to be appropriate. However, the survey highlights other factors of geat importance and provides valuable information on how to achieve satisfactory REAC performance. Keywords: Hydroprocessing, hydrocracking, hydrotreating, reactor effluent air cooler, ammonium bisulfide, Kp, balanced and unbalanced headers, inlet and outlet piping, ferrules.
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A major fire in a Reactor Effluent Air Cooler (REAC) of the Hydrocracker Unit (HCU). Visual inspection was made on the failed portion. Metallurgical investigation, macrostructural and microstructural analysis, Scanning Electron Microscopy, and Energy Dispersive x-ray Spectroscopy was conducted on the failed air cooler.
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