本文从换热器使用中换热管与管板连接接头，因为胀管率控制不当，而带来接头曳漏较普遍这个问题，从而介绍了液压胀接新工艺特点、液压胀接原理、胀轴的设计、胀接压力的选定以及液压胀接操作情况。重点阐述了液压胀接工艺模拟试验和液压胀接在换热器管子与管板胀接中应用优越于机械胀接。 This article from the heat exchanger tubes used in the connection with the tube plate connector, because the tube expansion rate control improper, and bring joint leakage of the more common problem, which introduced the new features of hydraulic expansion process, hydraulic expansion principle, expansion Shaft design, expansion pressure and the selection of hydraulic expansion operation. Emphatically elaborated the hydraulic expansion process simulation test and the hydraulic expansion in the heat exchanger pipe and tube plate expansion in the superior application of mechanical expansion joint.