The risk management of high-strength steels in jack-ups in seawater

Abstract

The risk management of high-strength steels used for the legs of production jack-ups, with no opportunity for dry dock inspection, requires careful attention to several factors, such as design, materials selection, fabrication and corrosion protection in service. The performance of such steels in seawater is reviewed, together with options for corrosion protection. Measures to reduce the incidence of hydrogen-assisted cracking have been identified from previous research and field experience, and are assessed. Risk management options are considered for the design process, selection of resistant materials, choice of an appropriate corrosion protection system and the detection of any cracking via efficient in-service inspection. Several key areas requiring further information and feedback from the field are identified.