Since the restart on April 22, 1998, Luoyang Refinery experienced leakages on 3 overhead heat exchangers in atmospheric distillation unit, which greatly affected the refinery operation.

• 洛阳炼油厂第14生产周期自1998年4月22日开工以来，3台常顶换热器先后出现内漏，对生产造成了较大的影响。