This document supersedes the October edition of DNV-RP-F The purpose of the revision of this service document is to comply with the new DNV GL. If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall. DNV-RP-F DESIGN OF DUPLEX STAINLESS STEEL SUBSEA EQUIPMENT EXPOSED TO CATHODIC PROTECTION.
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To facilitate this comparison, comprehensive material characterization, small, intermediate and full scale environmental-mechanical testing, and finite element analyses were conducted.
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Proceedings of an international conference Subsea Controls and Data Acquisition ‘ Instead, the industry assumes that hydrogen charging will happen and relies instead on design approaches that avoid equipment being exposed to stresses or strains exceeding the nominal thresholds for HISC.
However, whilst these materials are advantageous for managing internal corrosion, they still require external cathodic protection CP to prevent localized corrosion in seawater at typical operating temperatures. Advanced search Show search help.
Proceedings of an International Conference Submersible Technology: In the presence of a critical hydrogen concentration, all duplex and super duplex stainless steels are susceptible to hydrogen embrittlement, via a cracking mechanism commonly referred to as HISC: Typical uses are short flowlines, welded hubs and flanges, manifolds, towheads, flowbases, sensors and valves.
Log in to d112 subscription Username. Whilst mitigations such as increased less negative CP potential, tailored microstructure and high-reliability coatings can be considered, these are challenging and are f121 a complete barrier to the threat.
Publishers Content Coverage Privacy. Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition. ABSTRACT Ferritic-austenitic duplex and superduplex stainless steels DSSs and SDSSs are an attractive option for subsea equipment and connecting spools, in which the f1112 corrosion threats can be difficult to manage, using corrosion inhibition and in-line inspection.
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Ferritic-austenitic ro and superduplex stainless steels DSSs and SDSSs are an attractive option for subsea equipment and connecting spools, in which the internal corrosion threats can be difficult to manage, using corrosion inhibition and in-line inspection.
Peer reviewed only Published between: This CP results in hydrogen charging of the duplex stainless steel, either at uncoated locations or, in locations where the coating has lost integrity. Full scale test validation of this approach is limited. As subsea facilities are protected from cnv corrosion by cathodic protection CPS DSS components are exposed to hydrogen uptake, especially when a coating system is not in place or has failed at a certain location.
Hydrogen Induced Stress Cracking (1 Day) – DNV GL
Rock Mechanics Symposium and 5th U. A comprehensive test program is described quantifying the HISC performance of retrieved superduplex stainless steel subsea components and, comparing the actual performance against the limits derived following DNV RP F Proceedings of an international conference Oceanology: Proceedings of an international conference Diverless and Deepwater Techology: