The heat transfer plate is the main component of the plate heat exchanger. It is generally stamped and formed by stainless steel plate. There are various specifications and models, and corrugated plates and mesh plates are common. After many years of use, cracks or clogging may occur, causing foreign matter to be mixed into the product or causing sterilization failure. The main reasons are: (1)The steel sheet is stamped and formed to generate large residual stress;(2)The operating pressure is too concentrated during operation. Internal stress at the edge of the heat transfer plate; (3) Effect of C1 used as pickling or sterilizing agent during CIP cleaning;(4)In the processes of processing, cleaning, sterilization, and parking, the temperature and pressure repeatedly change the stress generated.. Accordingly, the prolonged service life should be considered mainly from the plate own factors, such as the use of high-quality 1Cr18Ni9Ti to improve corrosion resistance; the use of corrugated shapes with small residual stress, or effective stress relief after stamping; or the use of high-strength corrugated shapes It is also possible to disperse the peripheral stress of the running plate by modifying the shape of the sealing surface.