We have a serious problem in our coker heater. Every time we have to decoke or shut down the heater leaks appear and we are days trying to stop them. Maintenance people use grafoil tape to seal the mule ear. Despite this seems to work, the seal is not good enough and when we feed the heater, the mule ear leaks until they coke.
Can anyone tell me about that mixture of oil and grafite? In which proportions do you mix them? or is there a procedure for repairing the return bends?
Id very appreciated if you can help me.
Other thing… Does anyone have a procedure for pressure-test the fired heater?
Thank you very much!!
Carlos
