...Roberto Montes-Iturrizaga; Ernesto Heredia-Zavoni; Francisco Vargas-Rodríguez; Michael Havbro Faber; Daniel Straub; Juan de Dios de la O The present paper introduces a general framework for integrity management of offshore steel jacket structures allowing for the risk based planning of inspections...

... ships (FPSOs and FSOs). Very slim chances to implement such fatigue improvement will arise when these vessels are in service, since a converted ship is designed to be inspected, maintained, and repaired in situ and not in dry dock as it is uneconomical to interrupt production. Codes recognize fatigue...

... to the reliability index. An application to risk based inspection planning for extension of the service life of a platform is given. Variation of conditional probability of failure versus RIF as a function of the coefficient of variation in the wave loading bias λ Variation of conditional...

... in pipelines. It is demonstrated how the time-variant corrosion process can be consistently represented by time-invariant random variables, using equivalent values of the corrosion rate. Finally, the influence of temporal variability on reliability updating following inspections is investigated and it is shown...

..., cracks are detected by means of close visual inspection when they have already propagated through the thickness. The propagation of long cracks in stiffened panels is therefore considered, as they may be present in critical details of the deck and/or bottom plating of the vessel. Although it has been...

... and quantitative published data in the Gulf of Guinea, where biological fouling has a significant impact on cost of structural inspection and maintenance because of the importance of colonization due to favorable environmental parameters (warmer temperature of seawater, intense action of the waves generating...

... need for unmanned underwater vehicles (UUVs) in oil and gas projects in the Persian Gulf, for doing operations such as inspection of offshore jackets, subsea pipelines, and submarine cables, and also pre-installation survey and post-laid survey of submarine pipelines and cables, design and construction...

... concerning the correctness and consistency of uncertainty modeling applied in the most recent reliability updating analysis for structural requalification and inspection and maintenance planning. To this end an outline is given in regard to appropriate uncertainty treatment in the probabilistic modeling...

...Michael Havbro Faber; John D. Sørensen; Jesper Tychsen; Daniel Straub After a brief outline of the simplified and generic approach to reliability- and risk-based inspection planning, focus is set on a recent application of the methodology for the planning of in-service NDT inspections of fixed...

... to aging ships’ structural integrity are assessed using the observations of the corrosion wastage database. The investigated risks are loss of local member’s strength, loss of global hull girder strength, and shortened inspection intervals. The experience database can be used in many aspects...

...Daniel Straub; Michael Havbro Faber Reliability and risk-based inspection planning (RBI) has been developed in the past for single structural details subject to fatigue, based on structural reliability analysis. This paper extends the methodology to systems with a stochastic dependency between...

...Ernesto Heredia-Zavoni; Roberto Montes-Iturrizaga A Bayesian framework is used for updating the probability distributions of the parameters of a fracture mechanics model and of crack size in tubular joints using information from inspection reports of fixed offshore structures. An error model...

...Jan Mathisen; Kjell Larsen The use of risk-based inspection planning for offshore structural components is becoming quite familiar. This paper describes an application of this technique to mooring chain. In many cases, the technique is based on probabilistic modelling of fatigue crack growth...

...Michael Havbro Faber; Daniel Straub; Jean Goyet 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...

...Torgeir Moan; Ruxin Song Offshore structures are considered as fail safe and inspections are carried out during their service lifetime to assess their actual condition. In this paper, the effect of inspection updating on fatigue reliability of offshore structures is investigated. In particular...

...Inge Lotsberg; Gudfinnur Sigurdsson; Per Terje Wold Probabilistic methods has been used to develop a basis for an in-service inspection program for the Åsgard A FPSO hull structure with respect to fatigue cracks. Åsgard A is a floating production unit constructed for Statoil and was installed...

... environmental conditions did considerable damage. PEMEX implemented a rapid repair program and was able to bring tile production back to its normal levels within two months. Subsequently, PEMEX, jointly with Instituto Mexicano del Petro´leo (IMP), launched an extensive program to inspect, assess, and repair...

..., induced extreme environmental forces to the offshore facilities (see Fig. 3 ). 3 Hurricane Roxanne’s track in Bay of Campeche Right after the storm dissipated, a special inspection program was performed to detect evident structural damages in platforms and submarine...