Basis and Development of Toughness Requirements for Class 2, Class 3, Containment and Component Support Materials in Section III of the ASME Code

[+] Author and Article Information
S. Yukawa

Boulder, CO 80301

W. D. Doty

Doty and Associates, Inc., Pittsburgh, PA 15227

E. I. Landerman

Pittsburgh, PA 15221

J. Pressure Vessel Technol 112(3), 193-198 (Aug 01, 1990) (6 pages) doi:10.1115/1.2928613 History: Received March 21, 1989; Revised April 09, 1990; Online June 17, 2008


In 1972, Section III of the ASME Boiler and Pressure Vessel Code adopted new fracture toughness requirements for Class 1 components based on fracture mechanics concepts. In the ensuing several years, new toughness requirements were developed and adopted for the other Section III classes of components covered by Subsections NC, ND, NE, and NF. This paper describes the chronology of these developments and the bases of the rules and criteria. The formulation of specific rules is discussed and examples of data used to support the criteria are described. The rules and requirements as initially adopted, and subsequent revisions and modifications are discussed to show their evolution into the current version.

Copyright © 1990 by The American Society of Mechanical Engineers
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