Anchorsholme Diffuser Replacement

Case Study Overview

Profiled steel plates were fabricated and assembled at R7M facility at Ipswich. Using R7M welders the structure was full penetration welded together. As the structure was to be assembled sub surface using divers the structure had to pre- assembled and test fitted to ensure easy assembly. After fabrication the entire structure was shot blasted to SA 2.1/2 and painted with 2 coatings of 125 micron Epigrip C425V2 zinc phosphate primer plus 1 No 400 micron coating of Epigrip M922.

Cathodic protection was prefitted to the diffuser before delivery to site. Assembly tools and bolt racks were designed and fabricated to assist the divers with the installation. Total fabricated weight was 21t in 6 pieces

At a glance

  • Project: Fabrication of outfall diffuser and pile guides
  • Location: Ipswich R7M fabrication facility
  • Project Cost: £39510
  • Programme Duration: 6 week fabrication and painting programme completed on time
  • In-House resources Work: All fabrication and coded welding works by R7M personnel
  • Sub-contractors Work: Blasting and painting on site of steelwork. MPI and UT testing by third party

The Solution

Fabrication was started prior to complete design being finalised with additional information being supplied by dive surveys.

As the fabrication was being done in house this allowed modifications to be carried out to suit the installation requirements prior to arriving at site.

Anchorsholme
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“Great Yarmouth Third River Crossing: The Red7Marine team have played a big part in the success of the cofferdam piling works. Once again, the spirit of cooperation between all involved has been exemplary and this goes a long way towards making life easier for all involved. I would like to pass on my personal thanks to everyone at Red7Marine for your help and I look forward to working with you all again at some point in the future.”

Richard Hayman, Construction Manager BAM Nuttall