Stainless steels are an important group of materials for seawater systems. This group of materials including high-alloyed austenitic and superduplex type materials, was primarily introduced with the aim to reduce maintenance costs involved with materials as carbon steel with internal linings and coatings. However, on some offshore platforms the leak frequency in seawater stainless steel piping systems has been high resulting in unacceptable maintenance cost. This study has evaluated the field experience with stainless steel materials in seawater systems at three company-operated offshore platforms in the North Sea area. Variables as specifications, qualification test criteria, quality and operating conditions have been evaluated. In addition, actual material samples from the involved field installations have been tested for corrosion resistance and have been metallographically examined. The findings from this study will be further evaluated for implementation both in material standards and in quality control strategies for deliveries and installation of high-alloyed stainless steel for new projects.
Field experience with stainless steel materials in seawater systems
Betriebserfahrungen mit nichtrostendem Stahl in Meerwassersystemen
Stainless Steel World ; 10 , 9 ; 27-33
1998
6 Seiten, 3 Tabellen, 12 Quellen
Article (Journal)
English
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