Subsea vibration suppression system

Written by: Laura Hopperton | Published:

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, said: "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."

Trelleborg utilised its offshore and VIV knowledge in the design of the T-Strake and carried out extensive computational analysis and physical testing. The system has a high temperature resistance, is capable of withstanding installation loads and is available in a choice of colours.

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.

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