Effects of alternative inspection strategies on piping reliability

M. A. Khaleel, F. A. Simonen

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

This paper applies probabilistic fracture mechanics calculations to determine the effects of inspection on leak probabilities for piping. The approach has been to perform calculations in a structured parametric format, with the parameters selected to cover the range of pipe sizes, degradation mechanisms, operating stresses, and materials relevant to the piping systems of interest. In this paper, the calculations were intended to be generally applicable to mechanical and thermal fatigue of stainless steel piping. Specific areas of uncertainty addressed by the probabilistic calculations of this paper are the numbers of initial flaws, the distributions of flaw sizes, the crack growth rates for these initial flaws, and the probability of detection curves and inspection schedules that describe inservice inspections that are performed to detect these growing flaws. The effectiveness of an inspection strategy is quantified by the parameter "Factor of Improvement," which is the relative increase in piping reliability due to a given inspection strategy as compared to the strategy of performing no inspection. The results of a systematic set of calculations are presented in this paper that address inspection effectiveness for operating stresses giving crack growth rates ranging from very low to very high. Inspection strategies are described that address three reference levels of ultrasonic inspection reliability, intervals between inspections ranging from 1 to 10 years, and both preservice and inservice inspections.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Pages207-210
Number of pages4
Volume346
Publication statusPublished - 1997
Externally publishedYes

Fingerprint

Inspection
Defects
Crack propagation
Thermal fatigue
Piping systems
Fracture mechanics
Stainless steel
Ultrasonics
Pipe
Degradation

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Khaleel, M. A., & Simonen, F. A. (1997). Effects of alternative inspection strategies on piping reliability. In American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP (Vol. 346, pp. 207-210)

Effects of alternative inspection strategies on piping reliability. / Khaleel, M. A.; Simonen, F. A.

American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. Vol. 346 1997. p. 207-210.

Research output: Chapter in Book/Report/Conference proceedingChapter

Khaleel, MA & Simonen, FA 1997, Effects of alternative inspection strategies on piping reliability. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. vol. 346, pp. 207-210.
Khaleel MA, Simonen FA. Effects of alternative inspection strategies on piping reliability. In American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. Vol. 346. 1997. p. 207-210
Khaleel, M. A. ; Simonen, F. A. / Effects of alternative inspection strategies on piping reliability. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. Vol. 346 1997. pp. 207-210
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