Methods For Measuring Residual Contact Pressure Of Hydraulic Expansion Joints In Heat Exchangers

The hydraulic expansion of the heat exchanger tube and tubesheet is an important method in the uniform expansion. Compared with other methods, the advantages of hydraulic expansion are high productivity, low labor intensity and reliable expansion performance. This paper describes several common methods for the determination of the residual contact pressure between the tube and tubesheet, and describes the principle, characteristics and the current status of the measurement at home and abroad. This paper also summarizes the development of future methods for measuring the residual contact pressure in the hydraulic expansion joint.