文章介绍了换热管与管板的胀接,其中机械胀接由于优点多,操作简单,因此应用广泛。为了检查胀管的质量、管材的胀接性能,确定最佳的胀度,检验胀接部位的外观质量及接头的密封性能,测试胀接接头的抗拉脱力,在正式胀接前应进行试胀,通过试胀,检验合格,选定最佳胀度,待正式胀接时采用。 The article introduced the heat exchange tube and the expansion of the tube plate, which mechanical expansion because of the advantages of multiple, simple operation, so widely used. In order to check the quality of expanded pipe, pipe expansion performance, to determine the best degree of expansion, test the quality of the appearance of expansion joints and joints of the sealing performance, test the tensile strength of the expansion joint, the test should be carried out before the formal expansion Expansion, through the test swelling, test qualified, the best choice of expansion, to be used when the formal expansion.