Ultrasonic pipeline inspection and data analysis provider NDT Global (Dublin, Ireland) and energy company Statoil (Stavanger, Norway) recently announced the suspension of the planned ÅSGARD pipeline tool build project. The subsea project is described by the energy company as among the largest developments on the Norwegian continental shelf.
Following a review of the pipeline’s detailed design and the integrity requirements, the chosen electromagnetic acoustic transducer (EMAT) technology is no longer presenting an efficient solution, according to the pipeline inspection group. Thus, a mutual decision was reached to suspend the project.
“Our engineering team have achieved outstanding results to invent, develop, and validate the technology for the direct measurement of wall thicknesses of up to 55-mm [2.2-in] in gas pipelines,” says Wolfgang Schaefer, chief engineer of technology services. “This technology was applied in a multi-diameter tool, capable of inspecting both 28-in [71.1-cm] and 42-in [106.7-cm] nominal diameter for the line’s sizable 707-km [439.3-m] length.”
However, further testing to prove the technology remains, according to the company. As a result, the engineering team has been re-assigned to other projects, where they will apply the skills and experience gathered during the EMAT technology and tool development phases.
Their aim is to perfect the measurement technology, replace hydrostatic testing, and achieve the company’s overall corporate goal of eliminating pipeline failures caused by material defects. Many of these projects are conducted in close partnership with customers and in accordance with the company’s overall technology and product roadmap.
NDT Global continues to service Statoil with inline inspections under a long-term framework agreement.
Source: NDT Global, www.ndt-global.com.