In general a sealing technology involving welding in combination with expand jointing is used for connecting a pipe column to a tube plate in a tubulature type heat ex- changer.

列管式换热器的换热管束与管板连接一般均采用焊接加胀接的密封固定工艺。

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The proposed rod adopts a structure of screw-pair jointing, load-bearing cylinder and thin-wall tube, and is characteristic of high energy transfer efficiency and good anti-fatigue life.

新型钎杆采用螺旋副连接柱面承载结构和薄壁管式结构，具有能量传递效率高抗疲劳寿命性能好等特点。

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