1、2023 年 8 月 13 周强，等.基于热点应力法和结构应力法的保温支撑圈焊接接头疲劳评估及对比Fatigue Analysis and Comparison of Welded Joints of Insulation Support Ring Based on Hot Spot Stress Method and Structural Stress MethodZhou Qiang,Zhang Qun,Ji Cunmin,Yang Jing,Li Lin（Southwest Research&Design Institute of the Chemical Industry Co.,Lt
2、d.,Chengdu,Sichuan 610225,China）Abstract:For welded joints of thermal insulation support ring and shell in fatigue vessels,the hot spot stress method based on extrapolation in European pressure vessel standard EN 13445-3 and structural stress method in American pressure vessel standard ASME-2 were u
3、sed for fatigue assessment.The results show that the fatigue life calculated by the hot spot stress method is greater than that calculated by the structural stress method,but both are far less than the fatigue life of the base metal of the equipment shell.When the equipment is expected to have a lar
4、ge number of pressure cycles,in order to meet the fatigue life of the welded joint of the insulation support ring,the shell film stress is reduced to a very low level,which will lead to a large waste of the shell material.Therefore,in the fatigue equipment with a high number of cycles,non-welding in
5、sulation support mode should be used as far as possible,or other welding insulation support structures with better forces should be used.Keywords:fatigue of welded joints;hot spot stress;structural stress;thermal insulation support ring;pressure swing adsorption化工设备与管道诚聘审稿专家化工设备与管道面向石油化工、化工行业，及时报道化工
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