Vortex induced vibration system

Paul Boughton

Trelleborg’s offshore operation has launched an innovative new vortex induced vibration (VIV) system. The high performance T-Strake features a modular design, enabling more efficient transportation and installation. 

Jonathan Fox, senior product development engineer for Trelleborg’s offshore operation, says: “Pipelines unsupported over free spans, such as steel catenary risers and rigid steel flowlines, are prone to VIV fatigue, which can lead to serious issues such as pipe girth weld failure or premature pipe malfunction. To combat this, the T-Strake comprises interlocking moldings, with three-start helical strakes.”

Each section of the system has been designed as a single component, ensuring it is quick and easy to pre-install onshore or install offshore. The design enables the system to be stacked during shipping, ensuring more efficient and cost effective transportation. Trelleborg’s innovative manufacturing process also means that the T-Strake can be produced up to six times faster than systems manufactured using traditional techniques, ensuring short order times.

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