An overview of the development the last 20 years with respect to materials and material selection for topside platform sea water piping, including past, current and future practice are dealt with. Piping systems for sea water, fire water and injection water are discussed. The impact of chlorinated natural sea water on the corrosion resistance of one high alloyed stainless steel is shown. The materials to be selected for today's
design are discussed along with a descriptive criteria for future material selections. Keywords: Material selection, marine corrosion, fire water, injection water.