Water Treatment Modules (QUAD 204)
The objective of the Quad 204 project is to provide a new build FPSO to replace an existing FPSO in the West of Shetland area that will enable the continued development and exploitation of the hydrocarbon reserves in and around the Quad 204 area.
ENG-CAD’s involvements with this project were 5 different Water Treatment Packages, the largest of which weighed in excess of 150 Tonnes.
Structural design and analysis was carried out on all of the packages, along with a full pipe stress analysis. Once this was completed detailed fabrication drawings were produced of the structures, covering primary and secondary steelwork, hand railing, grating, ladders, access platforms and pipe supports etc.
Also, once the pressure vessels had been delivered to the fabrication facility, the dimensional control survey team carried out the necessary checks to ensure the vessels were fabricated within the correct tolerances and were suitable for installation in the packages.
As an example, on one of the sites the survey team have carried out on-site dimensional control surveys on the existing accumulator and re-boiler assemblies. Reports were then produced which were followed by fabrication detail and assembly drawings for the plant replacement, including associated pipework that has been affected by the change.
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