The insulation material will be used primarily to improve flow by maintaining the temperature of production fluids through the m-pipe. But it can also be modified to add weight or buoyancy to manage stability of the pipe in the water column.
Currently the insulated product is undergoing qualification for use in jumpers for a project in the North Sea and in the Ocyan CompRiser design.
Magma had been looking to improve the m-pipe’s thermal insulation properties to maintain flow temperature. Thermotite ULTRA is a styrene alloy subsea insulation system designed for flow assurance in ultra-deepwater: the insulation layer is said to help allow the pipe to be transported and deployed on standard reels.
Being able to manage pipe stability through adding buoyancy or weight directly into the insulation material, Magma added, allows each design to be simplified, thereby cutting engineering and installation times for buoyancy and ballast modules.
Flowlines, jumpers, and pure carbon fiber riser designs could all benefit.
Initially the product will be applied to assess m-pipe jumpers in Norway, with the Shawcor insulation layer cast molded with a 45-mm thickness providing a U-Value of ≤ 5.0 W/m2K.
This should allow consistent flow temperature to be sustained in water temperatures of 2°C (36°F) in order to maintain a good flow rate and minimize build-up.
After the integrated system has been qualified, a cross-head extrusion line will be integrated into the main m-pipe production line at Magma’s manufacturing site at Portsmouth on the English south coast.
A sample is available to view at Magma’s stand #531 atSubsea Tieback today and tomorrow.