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Aquamarine Power Internal Guidance

OY800-TN-0080 - Threaded Fastener Design Guidelines


  • Stage

    Historic Information

  • Author

    Aquamarine Power Ltd

  • Date

    July 2020

During the design of Oyster 800, the criticality of securing fasteners was recognised in the light of experience and learning from Oyster 1. A guidance note was therefore prepared outlining recommendations maintained from the design of Oyster 1, and from new experiences gained directly from Oyster 800 or through other learning avenues. These include engagement with external specialists (notably Bolt Science and Technip Offshore Wind Ltd), specialist training (ASME PCC-1 course on bolted flange joint assembly), supplier engagement and literature review.

The only way to ensure that bolted connections will work effectively over the life of a project is through careful design engineering. Good working practices during component manufacture and joint assembly are also necessary, but if it is difficult (or impossible!) to implement the design intent correctly on site, the chances of joint failures increase significantly. It is therefore essential that the engineer understands how the joint will be made in practice and ensures the design is fit for this purpose.

The purpose of this document is to summarise Aquamarine Power’s learning in the form of guidelines for good design practice in threaded fastener connections. For the purposes of this note, bolted connections have been generalised into a small number of discrete application categories. It is intended that common approaches may be adopted for design of bolted connections within each of the categories described in this document.

Project Keywords: Guidance, Lessons Learnt, Coatings, Torque, Materials, Operations & Maintenance, Corrosion, Engineering, Bolting, Reliability

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