By material and crystal analysis of the swollen and cracked pyrolysis furnace tubes,summarizes reasons for the failure of the tubes,and proposes preventive measures.

• 通过对其鼓包及开裂的裂解炉炉管进行材质和晶相组织分析,找出了炉管故障发生的原因,并提出了具体的预防措施。