A Structural Integrity Assessment Methodology for Pressurized Vessels

[+] Author and Article Information
Raymond K. Yee

Mechanical & Aerospace Engineering Department, San Jose State University, One Washington Square, San Jose, CA 95192-0087rkyee@email.sjsu.edu

Mike Kapper

Mechanical & Aerospace Engineering Department, San Jose State University, One Washington Square, San Jose, CA 95192-0087kapper.2@osu.edu

J. Pressure Vessel Technol 128(4), 541-546 (Oct 25, 2005) (6 pages) doi:10.1115/1.2349564 History: Received September 14, 2005; Revised October 25, 2005

Pressurized vessels such as a steam drum in a typical power plant can often experience in-service cracking. Structural integrity assessment methodology can be a useful tool to determine the suitability of a vessel for service. This methodology may include fitness-for-service and remaining useful life analyses of a vessel based on the nondestructive examination (NDE) results and operating conditions. In this paper, the structural integrity assessment methodology applied to a steam drum case study is described. The analysis procedure, material property determination, stress analysis, limiting flaw size evaluation, and remaining useful life evaluation for the drum are discussed. A thermal shock design tool is briefly introduced. Recommendations for appropriate action are also presented. The assessment methodology employed in this paper can be applied to other similar pressurized vessels and structures in power plants.

Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Fracture mechanics approach (three fracture parameters relationship)

Grahic Jump Location
Figure 2

Schematic of a simple steam power plant

Grahic Jump Location
Figure 3

Schematic showing the surface flaw locations at the inner surface of the steam drum wall

Grahic Jump Location
Figure 4

ASME lower bound fracture toughness curves for ferritic steels (9)

Grahic Jump Location
Figure 5

Hoop stress distribution in the steam drum wall (the symbol ● represents the finite element analysis results)

Grahic Jump Location
Figure 6

Transient hoop stress distribution in the steam drum wall by spreadsheet design tool (horizontal axis at unit 1 represents the inside surface of the drum)

Grahic Jump Location
Figure 7

Failure assessment diagram for a 4.6mm deep by 178mm long inner surface flaw in the steam drum. (The points designated by ∎ represent the vessel with the given flaw size under hydrotest and operating conditions.)

Grahic Jump Location
Figure 8

Fatigue crack growth assessment methodology flow chart

Grahic Jump Location
Figure 9

Fatigue crack depth versus startup/shutdown pressure cycles for the steam drum



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In