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1 管 -管板焊接接头的结构换热器管 -管板焊接接头结构如图 1所示。L1 为伸出长度 ,L2 为焊脚高度图 1 管 -管板焊接接头结构2 管 -管板焊接接头泄漏原因从换热器管 -管板焊接接头的泄漏情况及强度焊接的结构特点来分析 ,焊接接头的泄漏原因主要是应力腐蚀和缝隙腐蚀。2 .1
1 tube - the structure of the tube plate welded joints Heat exchanger tube - tube plate welded joint structure shown in Figure 1. L1 for the extension length, L2 for the weld height Figure 1 tube - tube plate welded joint structure 2 tube - tube plate welded joint leakage reasons from the heat exchanger tube - tube plate welded joints leakage and structural characteristics of strength welding to analyze The main reasons for the leakage of welded joints are stress corrosion and crevice corrosion. twenty one