The failure problem of 800H alloy expansion joint bellow of ethylbenzene hydrogen removal system for styrene unit was analyzed in detail. Its failure reason and mechanisum were mentioned, and the protection was proposed.

• 对苯乙烯装置乙苯脱氢系统Incoloy 800H合金膨胀节波纹管的失效问题进行了详细的分析,阐述了其失效的原因与机理,并提出了防护对策。