Shell and tube heat exchanger is a kind of traditional heat exchange equipment, the most widely used. Because of its strong structure, and can choose a variety of materials manufacturing, it is highly adaptable. Shell and tube heat exchanger is widely used in various industries, in cement production enterprises commonly used as equipment oil station oil cooler, used as vehicle engine oil cooler. For a long time, steel tube-and-shell heat exchangers with its strong structure, high reliability, strong adaptability and wide selection of materials has been dominant in the production and use of the number of heat exchangers. With the development of heat transfer enhancement technology, the manufacturing technology and heat transfer performance of shell-and-tube heat exchangers have been improved constantly. However, due to the complexity of the structure and the diversity of working conditions, the local failure and even the whole scrap of heat exchanger often appear.