Does anyone inject steam into their crude heater or vacuum heater for online decoking? I am looking for some guidelines on this. I have an old refinery engineering book that may have some rules of thumb, I am curious to current practices. We inject steam into one of our two crude heaters, but none of the vacuum heaters. We may have enough capacity on our overhead/jet system to allow this. Some of our heaters don't get decoked even during turn around. I have seen hot spots on our heater tubes at times which has limited us on charge rate. Any comments would be greatly appreciated.
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