Duplex stainless steel grades are often used in applications in the subsea oil & gas industry because of the benefits that they have over austenitic stainless steels or coated carbon steels. This paper presents the requirement for umbilicals used in the subsea oil & gas industry and the precautions needed for manufacturing and welding super duplex stainless steel tubes. The super duplex stainless steel tubes used in umbilicals play a vital role in supplying hydraulic fluids, MEG, corrosion inhibitors to critical subsea equipment like Christmas trees, subsea control valves and subsea control modules. Hence a candidate material that can resist corrosion and also prevent functional failures of the control system is suitable. Super duplex stainless steel is more expensive then SS316L and other low-alloyed duplex stainless steels but is a proven material in such applications.
Super duplex steels in the subsea oil & gas industry
Superduplexstähle in der Tiefsee-Öl- und -Gasindustrie
Stainless Steel World ; 21 , Sep ; 39-43
2009
4 Seiten, 10 Bilder, 5 Tabellen, 3 Quellen
Aufsatz (Zeitschrift)
Englisch
Duplex stainless steels for offshore use
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