VijayaraghavanR
Petroleum
- Dec 21, 2020
- 1
Dear All,
We have an REAC (Reactor Effluent Air Cooler)in our Hydrocracking unit. During capacity enhancement study we found its tube velocity exceeds the limit of 6.1 m/sec for carbon steel (Slight increase in outlet temperature but acceptable). For accommodating the capacity either I have to increase the number of bays or upgrade the metallurgy (costly option, Alloy 825 cost is about 10 times higher). Increasing the air cooler bays results in piping symmetry issue, so this is also not a good option. But increasing the number of row by 1 (from 5 to6) and making 2 rows per pass will satisfy my velocity criteria.
Is increasing the number of rows and changing the passes is easy in the existing Air Cooler during revamp?
Thanks & Regards
We have an REAC (Reactor Effluent Air Cooler)in our Hydrocracking unit. During capacity enhancement study we found its tube velocity exceeds the limit of 6.1 m/sec for carbon steel (Slight increase in outlet temperature but acceptable). For accommodating the capacity either I have to increase the number of bays or upgrade the metallurgy (costly option, Alloy 825 cost is about 10 times higher). Increasing the air cooler bays results in piping symmetry issue, so this is also not a good option. But increasing the number of row by 1 (from 5 to6) and making 2 rows per pass will satisfy my velocity criteria.
Is increasing the number of rows and changing the passes is easy in the existing Air Cooler during revamp?
Thanks & Regards