0

Full Content is available to subscribers

Subscribe/Learn More  >

Proximity Rules for Subsurface Transforming to Surface Flaws for Class 1 Ferritic Vessels

[+] Author Affiliations
Kunio Hasegawa

Hitachi, Ltd, Hitashi-shi, Japan

Katsumasa Miyazaki

Hitachi, Ltd., Hitashi-shi, Japan

Douglas A. Scarth

Kinectrics, Inc., Toronto, Canada

Russell C. Cipolla

Aptech Engineering Services, Inc., Sunnyvale, CA

Paper No. PVP2006-ICPVT-11-93102, pp. 11-18; 8 pages
doi:10.1115/PVP2006-ICPVT-11-93102
From:
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 1: Codes and Standards
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4752-7 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by ASME

abstract

There is a rule in Acceptance Standards of Class 1 ferritic vessel in the ASME B&PV Code Section XI describing that allowable subsurface flaws near a component surface are transformed to allowable surface flaws. This is the proximity rule for the subsurface flaws. Allowable sizes of the subsurface flaws decrease with proximity to the component surface. Therefore, a subsurface flaw allowed in the component is not allowed if the same size subsurface flaw is slightly closer to the component surface. However, if the subsurface flaw with the same size is located closer to the component surface, the subsurface flaw not allowed close to the component surface is acceptable after transforming it to a surface flaw. This is a discontinuity of a subsurface flaw. This paper describes the discontinuity problems of the subsurface flaws transforming to surface flaws and proposes a new flaw-to-surface factor of proximity rule, minimizing the influence of the current allowable flaw sizes in the Acceptance Standards.

Copyright © 2006 by ASME
Topics: Vessels

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

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 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