ABSTRACT
An overview of the development in the last 20 years of materials and material selection for topside platform sea water piping, including past, current and future practice is presented. Piping systems for sea water, fire water and injection water are discussed based on the author's own experience and present engineering practice. The materials to be selected for today's design are commented on together with a description of future material selection. Materials such as 6Mo, e.g. UNS S31254 and 25Cr duplex, e.g. UNS S32760 are discussed with respect to pitting and crevice corrosion. Also the characteristic features of the other most used materials for sea water service are mentioned.
