换热器管接头胀接和焊接施工顺序的探讨  

Discussion on the Sequence of Expansion Joint and Welding Construction for Tube-to-tubesheet Joints of Heat Exchanger

作　　者：李亮 LI Liang(Shanxi Institute of Technology,Department of Mechanical Engineering,Yangquan 045000,China)

机构地区：[1]山西工程技术学院机械工程系,山西阳泉045000

出　　处：《化工管理》2024年第23期160-164,共5页Chemical Management

摘　　要：随着换热器换热管和管板连接胀焊并用的设计越来越多,在管接头施工工艺顺序的选择上,需根据具体工况选择先焊后胀还是先胀后焊。然而,制造厂在制定管接头施工工艺时,无具体理论支撑,习惯依据经验,对所有换热器统一选择固定不变的胀焊施工顺序,导致部分换热器在服役过程中出现管接头泄漏。文章通过多年生产经验的积累,对两种施工顺序的优缺点进行分析,同时总结后焊对先胀的影响和后胀对先焊的影响,得出两种施工顺序的适用场合,为制定合理的管接头施工工艺提供依据。With the increasing use of expansion and welding in the design of heat exchanger tubes and sheet,the selection of construction process sequence for tube joints needs to be based on specif ic working conditions,whether welding before expansion or expansion before welding.However,when manufacturers formulate the construction process for pipe joints,there is no specif ic theoretical support.They tend to choose a f ixed and unchanging expansion welding construction sequence for all heat exchangers based on experience,which leads to some heat exchangers experiencing pipe joint leakage during service.This paper analyzes the advantages and disadvantages of two construction sequences based on years of production experience.At the same time,it summarizes the impact of post welding on f irst expansion and post expansion on f irst welding,and identif ies the applicable scenarios for the two construction sequences,providing a basis for formulating reasonable pipe joint construction processes.

关 键 词：换热器 管接头 先焊后胀 先胀后焊 残余应力 

分 类 号：TQ051.5[化学工程]