摘要
某石化厂一台新建的芳烃抽提二甲苯塔进行水压试验时压力超载,造成设备筒体开裂、部分内支撑圈和外加强圈断裂、筒体产生塑性变形等损伤。通过对该设备的全面检验和分析评估,认为更换了其中的5个筒节后其整体安全性能尚能满足使用要求。通过事故分析,提出制造过程中应使内支撑圈的对接焊缝避开与筒体之间的角焊缝,以防止支撑圈的对接焊缝开裂扩展到筒体。
An xylene tower of a petrochemical plant was cracked on the wall by over-pressured hydrostatic test after its construction.The over-pressure also damaged the inner supporting and outer stiffening rings,caused plastic deformation to the cylinders.By overall inspection and safety assessment,the tower was considered to be conformity with the requirement to use.The economic lost was avoided from not rejecting the entire tower.The failure analysis also give the suggestion that the butt welding joint of the internal supporting ring should not connect to the fillet welding joint between the ring and cylinder,then the break of the butt-welding joint can be prevented from spreading to the cylinder.
出处
《石油化工设备》
CAS
2010年第B08期8-10,共3页
Petro-Chemical Equipment
关键词
水压试验
泄漏
表面裂纹
安全评估
支撑圈
hydrostatic test
leakage
surface crack
safety assessment
supporting ring
