DNV to Lead Study Optimizing Clad and Lined Pipeline Materials

DNV will lead the work as 25 companies unite to gain a better understanding on how pipeline materials perform under different installation and service conditions. This will allow engineers to make better decisions to optimize future pipeline projects.

Clad and lined pipeline materials have been used in the oil and gas industry for handling corrosive media for more than 25 years. The service record of these pipelines has in general been very positive. However, based on experience from the most recent lined and clad pipeline projects, there are still technical issues that would benefit from further R&D work. Representatives of 25 oil and gas companies, such as Hydro, Statoil, Total, JSW, EBK, Butting and Technip, recently met at DNV's headquarters to address the technical issues encountered when working on projects utilizing these types of pipeline materials.

State-of-the-art report B Phase 1 of this joint industry project is to write a state-of-the-art report addressing:

  • Overmatching filler materials for girth welds
  • Non-destructive testing
  • Reel installation and snaking – local buckling
  • Pressure containment
  • Reel installation and snaking – fracture capacity and fatigue
  • Corrosion testing
  • Corrosion resistant alloy wall thickness requirements
  • Gripping force
  • Induction bending

The report will be ready in January 2006.

Phase 2 will then go on for the next two years consisting of experimental work defined in phase 1. New guidelines will then be developed.

"The results from both phases will be incorporated in a revision of DNV's offshore standard DNV-OS-F101 "Submarine Pipeline Systems," says DNV's project sponsor Bjørn-Andreas Hugaas.