摘要
介绍了脱水脱烃装置中原料气预冷器的基本情况,对其管箱/管板角焊接接头开裂后补焊又产生新裂纹的原因进行了分析,采用每层多道焊并磨去焊缝表面层、焊前预热及后热的特殊工艺进行返修后,焊接接头再未发生开裂现象。
The raw gas pre-cooler in de-hydration and de-hydrocarbon facility was briefed, and the cause of new cracking after repairing the cracks in the fillet weld between tube-case and tube sheet was analyzed. A special repair weld procedure, which performed multi-pass welding on each seam and grinds the surface layer,together with preheating and post-heating process,resulted in no cracks in the weld joint any longer.
出处
《石油化工设备》
CAS
2008年第6期59-62,共4页
Petro-Chemical Equipment
关键词
换热器
角焊接
接头
开裂
补焊
工艺
heat exchanger
fillet weld
weld joint
cracking
repair weld
procedure
