Unified Approach to Risk-Based Inspection Planning for Offshore Production Facilities

Author:

Faber Michael Havbro1,Straub Daniel1,Goyet Jean2

Affiliation:

1. Swiss Federal Institute of Technology, Institut fu¨r Baustatik und Konstruktion, ETH Ho¨nggerberg, HIL E32.3, Zu¨rich, 8093, Switzerland

2. Bureau Veritas, Marine Division, 17 bis, Place de Reflets, La De´fense2, 92400 Courbevoie, France

Abstract

Based on new methodological developments in the area of risk-based inspection planning (RBI) for structural components subject to fatigue degradation, the present paper presents a unified approach to risk-based inspection planning for offshore facilities comprising components and systems of both the structural and process type. Suggestions are given for the formulation of acceptance criteria on component level based on overall facility acceptance criteria in terms of risk to personnel, environmental risks and economical risks. The methodology facilitates a generic modeling of fatigue and corrosion degradation for both structural and process type components. Furthermore, special considerations are given to the important aspect of updating of inspection plans when degradation has been observed. The different aspects of RBI for steel components subject to fatigue and corrosion degradation are illustrated on an example considering RBI for the components of a tripod well-head platform.

Publisher

ASME International

Subject

Mechanical Engineering,Ocean Engineering

Reference15 articles.

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2. Lotsberg, I., and Sigurdsson, G., and Wold, P.T., 1999, “Probabilistic Inspection Planning of the Åsgaard A FPSO Hull Structure With Respect to Fatigue,” Proc. OMAE99, New Foundland, Canada.

3. Faber, M.H., Berge, H.E., Tiller, I., and Hall, M.E., 1999, “Reliability Based Assessment of Offshore Concrete Structures Subject to Chloride Ingress,” Proc. OMAE99, Newfoundland, Canada.

4. Rackwitz, R. , 2000, “Optimization–The Basis for Code-Making and Reliability Verification,” Structural Safety, 22(1), pp. 27–60.

5. Nathwani, J.S., Lind, N.C., and Pandey, M.D., 1997, Affordable Safety by Choice: the Life Quality Method, Institute for Risk Research, University of Waterloo, Waterloo, Canada.

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