February 2003


Dynamic analysis of pipe stress

Proper mathematical modeling requires a good understanding of the fundamentals

Chowdhary, M. G., Reliance Refinery; Bhattachrya, A., Bechtel India Pvt Ltd.; Varshney, H., Fluor Daniel India

Plant safety and reliability depend to a large extent on the accuracy of stress analysis of critical piping systems. Piping system loads are categorized as "sustained" - comprising pipe weight, along with fittings, fluid weight, insulation, etc. - as well as "operating" - in which thermal loads as a result of system expansion and contraction are taken into account. In addition, there will be occasional loads on piping systems such as seismic, and impact loads due to slug flow, relief valve opening, fluid hammer, etc. Although static analysis for the occasional loads is possible using dynamic load factor values or static

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