The buckling design criteria of elliptical heads in ASME VIII-1, ASME NH, and RCC-MRx are reviewed and compared. Accordingly, an external pressure chart (EPC) based buckling design approach is developed for elliptical heads in the creep range. Results indicate that for instantaneous buckling design, RCC-MRx predicts higher allowable pressure compared with ASME NH, which is ascribed to the smaller design factor. The proposed method produces a similar result with that given by ASME VIII-1. By contrast, the proposed method leads to a reasonably conservative result with the factor n of 0.03 for the creep buckling design. While the simplified method in RCC-MRx provides an over-conservative solution.
A Creep Buckling Design Method of Elliptical Heads Based on the External Pressure Chart
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received August 16, 2018; final manuscript received February 28, 2019; published online March 21, 2019. Assoc. Editor: Kiminobu Hojo.
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Liu, F., Gong, J., Gao, F., and Xuan, F. (March 21, 2019). "A Creep Buckling Design Method of Elliptical Heads Based on the External Pressure Chart." ASME. J. Pressure Vessel Technol. June 2019; 141(3): 031203. https://doi.org/10.1115/1.4043009
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