I am trying to put together a procedure for what to do after flow is lost due to a charge pump cavitation or trip. What I am evaluating is at what tube temperature it is safe to reintroduce feed and remove emergency steam to minimize the chance of fouling (this is assuming that the tube temperature rises). I assume that if the charge pump just cavitates that no-one would shut it down completely if the temperatures increased, but when should emergency steam be decrease back to velocity steam, and is there a certain flow rate you look for? If the pump trips, what tube temperature would you recommend before re-introducing feed?
