There are also certain standards when using heat exchangers, one of which is temperature. Too high or too low temperature is an impact on the equipment, and the leakage is a more common type of failure caused by temperature.
(1) The effect of temperature on the gasket
The heat exchanger flange is made of oil-resistant asbestos rubber sheet. The gasket will be aged under the high temperature of 55~120 °C for a long time, and the rubber will be lost due to the loss of elasticity.
(2) The effect of temperature on material properties
The sealing of the floating head cover and the floating head tube of the heat exchanger is that two hooks are hooked on the back of the tube sheet to form a hook flange, which is connected by bolts, and the hook flange is integrally cut and cut into two petals.When the hook ring and the bolt are in use, the mechanical properties of the hook ring and the bolt are lowered in the high temperature environment of 100 to 120 ° C for a long time, and creep and stress relaxation phenomenon may occur, so that the tension of the bolt is reduced. This causes the flange to reduce the amount of pressure on the gasket and cause a leak.
(3) Influence of temperature difference
There is a temperature difference between the heat exchanger flange, the cylinder, the bolt, the pipe box and the gasket, so that the various parts are inflated and contracted unevenly, which causes the flange of the equipment to leak.
The temperature has a great influence on the stability of the heat exchanger, which changes the sealing surface of the flange, affecting the degree of sealing of the floating flange and causing leakage. Therefore, we must pay more attention to the temperature when using it. .