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Technical Basis for Code Case N-806, Evaluation of Metal Loss in Class 2 and 3 Metallic Piping Buried in a Back-Filled Trench

[+] Author Affiliations
Robert O. McGill

Structural Integrity Associates, San Jose, CA

Mark A. Moenssens

Westinghouse Electric Co., Pittsburgh, PA

George A. Antaki

Becht Engineering Company, Aiken, SC

Douglas A. Scarth

Kinectrics, Inc., Toronto, ON, Canada

Paper No. PVP2012-78392, pp. 269-274; 6 pages
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 1: Codes and Standards
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5500-3
  • Copyright © 2012 by ASME


This paper presents the technical basis for Code Case N-806, Evaluation of Metal Loss in Class 2 and 3 Metallic Piping Buried in a Back-filled Trench – Section XI, Division 1. This Code Case has been prepared in the ASME Section XI Task Group on Evaluation Procedures for Degraded Buried Pipe. It addresses the nuclear industry need for evaluation procedures and acceptance criteria for the disposition of metal loss that may be discovered during the inspection of piping buried in a back-filled trench.

This paper provides background discussion, scope of the Code Case, key definitions and a summary of Code Case methods followed by the basis explanation where necessary. It is organized to follow the same structure as the Code Case for ease of use.

Copyright © 2012 by ASME
Topics: Metals , Pipes



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