Limit loads for circular wall-Thinned feeder pipes considering bend angle

Kyung Dong Bae, Jin Ho Je, Jong Sung Kim, Yun Jae Kim

Research output: Contribution to journalArticle


In CANDU, feeder pipes supply heavy water to pressure tube and steam generator. Under service conditions, Flow-Accelerated Corrosion (FAC) produces local wall-thinning in the feeder pipes. The wall-thinning in these pipes affects the integrity of the piping system, as verified in previous research. This paper provides limit loads for wallthinned feeder pipes with 45° and 60° bend angles, and proposes an equation that predicts the limit loads for wallthinned feeder pipes with arbitrary bend angles. On the basis of finite element limit analyses, limit loads are obtained for wall-thinned feeder pipes under in-plane bending and internal pressure. There are two cases of in-plane bending: the in-plane closing direction and the in-plane opening direction. The material is considered the effect of the large deformation, so an elastic-perfectly-plastic material is assumed in the calculations.

Original languageEnglish
Pages (from-to)313-318
Number of pages6
JournalTransactions of the Korean Society of Mechanical Engineers, A
Issue number3
Publication statusPublished - 2012 Mar 1



  • Bend angle
  • Bending
  • Circular wall-thinnings
  • Feeder pipe
  • Internal pressure
  • Limit load

ASJC Scopus subject areas

  • Mechanical Engineering

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