What are the signs of a cracked furnace tube? How to handle it?

Phenomenon: Mild: A small amount of oil sprays out from the crack in the furnace tube, and the furnace temperature as well as the flue gas temperature rise. In severe cases: A large amount of oil sprays out from within the furnace tubes and catches fire; smoke emerges from the elbow boxes, tube sheets, manholes, etc., and the chimney emits large amounts of black smoke, with the furnace temperature rising sharply. Treatment: Slight rupture of the furnace tube: reduce temperature and flow rate, and handle it as a normal shutdown. Severe rupture of the furnace tube: The heating furnace is immediately shut down completely, and feeding is stopped. And a large amount of steam is blown into the furnace, with steam supplied at the furnace inlet to sweep through the tower (be careful of the furnace’s combustion condition during this sweeping process) ； If a fire breaks out in the vacuum furnace, the vacuum system should be immediately restored to normal pressure ； The others are handled as emergency shutdowns.

Let’s see what kind of furnace it is Why go?

As long as it cracks, work generally has to be stopped for repairs. The main difference is how severe the leakage is. If the leakage is severe, shutdown is carried out urgently; if it is mild, shutdown and purging are conducted according to the procedures to prepare for maintenance.