Va/Na corrosion on SS 321 tubes
Va/Na corrosion on SS 321 tubes
(OP)
Hello...I have a furnace that heats a stream of hydrogen, h2s,and heavy naphta from 320 to 380 °C. The tubes are made of 321 SS. The furnace is prepared to burn fuel oil. However our fuel oil contains now 200 ppm of V and 90 ppm of Na(originally, when the furnace was designed didnt contain V). The question is if vanadium/Na will corrode the ss of the tubes, or if it will affect the expected tube life.





RE: Va/Na corrosion on SS 321 tubes
RE: Va/Na corrosion on SS 321 tubes
What is the ash content of the fuel?
With that Na the ash will stick like mad and the V will lead to serious attack risk.
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Plymouth Tube
RE: Va/Na corrosion on SS 321 tubes
A quick and dirty way I have used to diagnose vanadium poisoning is to point my PMI gun at it. If and when you examine tubes in service or after, take extra care with hygiene, because the corrosion products are toxic.