Stress and integrity analysis of steam superheater tubes of a high pressure boiler

Materials Research

Daniel Leite Cypriano Neves²  Jansen Renato De Carvalho Seixas²  Ediberto Bastos Tinoco¹  Adriana Da Cunha Rocha¹  Ibrahim De Cerqueira Abud¹ 

[1] ,PETROBRAS REDUC Industrial MaintenanceDuque de Caxias RJ ,Brazil

关键词: superheater;    high temperature damage;    boiler;   

DOI  :  10.1590/S1516-14392004000100021

来源: SciELO

【 摘 要 】

Sources that can lead to deterioration of steam superheater tubes of a high pressure boiler were studied by a stress analysis, focused on internal pressure and temperature experienced by the material at real operating conditions. Loss of flame control, internal deposits and unexpected peak charge are factors that generate loads above the design limit of tube materials, which can be subjected to strain, buckling, cracks and finally rupture in service. To evaluate integrity and dependability of these components, the microstructure of selected samples along the superheater was studied by optical microscopy. Associated with this analysis, dimensional inspection, nondestructive testing, hardness measurement and deposit examination were made to determine the resultant material condition after twenty three years of operation.

【 授权许可】

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