浅谈关于换热管内壁过烧问题的分析

Analysis on Over-Burning of Inner Wall of Heat Exchange Tube

换热管与管板的焊接在制造过程中还存在着一些问题,例如管板开孔超差、换热管管壁使用下差管、焊接工艺参数不规范等引起换热管与管板角焊缝焊后过热、咬边、气孔等缺陷一般制造厂都会做外观检查得到修复,但是因上述原因引起的换热管内壁过烧的现象,很多制造厂没有引起重视,如果这些问题得不到相应的重视,任由其发展,一方面很大程度上影响压力容器设备的使用寿命,另一方面增大的不安全操作的风险。所以要及时解决这种问题,保证设备的正常运行以及使用寿命。

There are still some problems in the welding process of heat exchange tube and tube-sheet.For example,the defects such as overheating,undercut and blowhole caused by the fillet weld between heat exchanger tube and tube-sheet caused by the over-tolerance of tube-sheet openings,the use of inferior tube wall of heat exchanger tube,the non-standard welding process parameters,and etc.However,many manufacturers have not paid enough attention to the over-burning of the inner wall of the heat exchange tubes caused by the above-mentioned reasons.If these problems are not given due attention,they will be allowed to develop,on the one hand,it greatly affects the service life of pressure vessel equipment,on the other hand,it increases the risk of unsafe operation.Therefore,it is necessary to solve this problem in time to ensure the normal operation and service life of the equipment.