In general a sealing technology involving welding in combination with expand jointing is used for connecting a pipe column to a tubeplate 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。
2
Tube bundle fix the drooped structures through welding for both ends of upper header and make fly ash drop by rapping the end plate of lower header.
锅炉中的管束是上部集箱的两端通过焊接固定垂下的结构，通过锤打下部集箱的端板，振落飞灰。
3
Based on the operating principle of magnetically impelled rotating arc, a new type of tube to plate butt welding device was designed.