Ammonia leakage in the heat exchanger, with a small amount of moisture inside the shell – what effects could this have?
Thread Content
The shell is made of Q345R material, and the medium used is circulating water. When ammonia impregnation is carried out, there is a small amount of moisture inside the shell – what impact will this have? Will it corrode?
The pressure from ammonia leakage is not high, and the testing time is short, so it shouldn’t cause any damage to the container. But if there is water in the container, it must be taken into account that ammonia is a gas with high water solubility, and it will definitely affect the concentration of the test gas.
The water inside the pipes is itself dirty; the ammonia solution (a mixture) formed as a result of its reaction with ammonia is highly alkaline and corrosive to the pipes. Therefore, pressure testing is carried out on the heat exchanger to detect leaks, and any damaged pipes are sealed off.