Roto-moulded strakes
Our Roto-moulded VIV suppression system is manufactured from a marine grade polyethylene (PE) material. The components are full circumferential mouldings with an axial split line. The system is designed to suppress damaging vibration forces to an acceptable level. The Roto-moulding manufacturing technique uses much less material than PU versions.
As with other VIV Suppression Systems these are required on steel catenary risers or unsupported rigid steel pipelines over free spans to suppress Vortex Induced Vibration. This particular system is only suitable, however, for installation and/or operating conditions that do not exert a load onto the VIV Profile. The vertical 'moon-pool' installation method is acceptable but the S-lay method cannot be accommodated.
Advantages:
- Generally our VIV suppression systems have been analysed using computational fluid dynamics software and tested in wet tank facilities, so that we have a comprehensive understanding of the required geometry
- The particular advantage of the Roto-moulded system is reduced material required = reduced product weight = reduced price compared to PU systems
- Note that the installation technique required may preclude the use of this type of design
VIV suppression strakes are made to order and can accommodate any likely riser/flowline diameter.