Corrosion Failure of a Tee Fitting
Wet natural gas was dried by being passed through a carbon steel vessel that contained a molecular-sieve drying agent. The drying agent became saturated after several hours in service and was regenerated by a gas that was heated to 290 to 345 deg C in a salt-bath heat exchanger. The tee joint in the piping between the heat exchanger and the sieve bed failed after 12 months. A hole in the tee fitting and a corrosion product on the inner surface of the pitting was revealed by visual examination. Iron sulfide was revealed by chemical analysis of the scale...
Corrosion Failure of a Tee Fitting, ASM Failure Analysis Case Histories: Oil and Gas Production Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.petrol.c0048698
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