A number of alloys have applications slightly into the creep range that are in cyclic service, such as process reactors. The 2007 edition of Section VIII, Division 2 (2007, ASME Boiler and Pressure Vessel Code, Section VIII, Division 2, The American Society of Mechanical Engineers) provides allowable stresses for these materials, which may be controlled by creep properties. However, the fatigue design rules and fatigue exemption rules are not applicable, precluding the construction of vessels using these materials at temperatures above (). This paper provides a simplified approach for the exemption of low chrome alloys that are slightly into the creep range from fatigue analysis. Part 1 of this paper (Becht, C., 2009, “Elevated Temperature Shakedown Concepts,” ASME J. Pressure Vessel Technol. 133, p. 051203) describes shakedown concepts, which are the basis for the criteria evaluated in this paper.
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April 2012
Research Papers
Extension of Fatigue Exemption Rules in Section VIII, Division 2 Slightly Into the Creep Regime
Charles Becht, IV,
Charles Becht, IV
Becht Engineering Co., Inc.
, Liberty Corner, NJ 07960
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Charles Becht, V
Charles Becht, V
Becht Engineering Co., Inc.
, Liberty Corner, NJ 07960
Search for other works by this author on:
Charles Becht, IV
Becht Engineering Co., Inc.
, Liberty Corner, NJ 07960
Charles Becht, V
Becht Engineering Co., Inc.
, Liberty Corner, NJ 07960J. Pressure Vessel Technol. Apr 2012, 134(2): 021101 (5 pages)
Published Online: January 19, 2012
Article history
Received:
May 1, 2009
Accepted:
December 7, 2010
Online:
January 19, 2012
Published:
January 19, 2012
Citation
Becht, C., IV, and Becht , C., V (January 19, 2012). "Extension of Fatigue Exemption Rules in Section VIII, Division 2 Slightly Into the Creep Regime." ASME. J. Pressure Vessel Technol. April 2012; 134(2): 021101. https://doi.org/10.1115/1.4003457
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