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Influence of Diverse Operating Cycles on the Useful Creep Life of P92 Steam Piping

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Abstract

Steam piping is one of the major components of power generation plant because of its use in conveying steam from the boiler to the turbines compartment. Over time, these pipings are subjected to diverse operating conditions in an attempt to meet the daily electricity demand. Hence, the useful creep life of the piping is drastically affected. In this study, finite element technique was used to investigate the influence of diverse operating cycles on the useful life of P92 steam piping. Faster stress relaxation with a characteristic higher creep strain was observed in the steady-state analysis as compared to those involving daily cycles. However, the rate of creep damage accumulation and the computed useful life under the different operating conditions computed using fe-safe/Turbolife software show that any form of daily shift has a detrimental effect on the useful life of steam piping.

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Acknowledgments

This work has been supported by Tshwane University of Technology and the University of Pretoria, South Africa. Also, the authors greatly appreciate the support of Eskom Power Plant Engineering Institute (Republic of South Africa).

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Authors and Affiliations

  1. Department of Mechanical and Mechatronics Engineering, Tshwane University of Technology, Pretoria, South Africa

    Smith Salifu & Dawood Desai

  2. Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, South Africa

    Schalk Kok

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  1. Smith Salifu
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Correspondence to Smith Salifu.

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Salifu, S., Desai, D. & Kok, S. Influence of Diverse Operating Cycles on the Useful Creep Life of P92 Steam Piping. J Fail. Anal. and Preven. 21, 983–992 (2021). https://doi.org/10.1007/s11668-021-01144-4

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  • DOI: https://doi.org/10.1007/s11668-021-01144-4

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