苯乙烯装置膨胀节失效分析及采取的措施

Failure of Expansion Joint in Styrene Unit and Preventive Measures

通过对介质、腐蚀产物、材料、断口的金相组织、裂纹形貌和晶界形貌的全面检查和分析,找到了苯乙烯装置膨胀节波纹管失效原因,确定裂纹为晶间和应力腐蚀组合型,并从选材、工艺操作和设计制造等方面提出了改进措施。

Through detailed examlnation and analysis of operation media, corrosion products, materials, metaUographic structure of fracture, crack form and grain boundary, the root causes of failure are located, and the cracks are determined to be a combination of intergranular and stress corrosion cracking. Improvement measurvs are suggested in respect of material selection, operating conditions, design and fabrication, ctc.