TRELLEBORG, Sweden – Trelleborg has launched a new vortex induced vibration (VIV) suppression system. The new T-Strake system features a unique modular design that Trelleborg says enables 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.”
Trelleborg used its offshore and VIV knowledge in the design of the T-Strake system, 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 colors, said the company.
Each section of the system is designed as a single component with the aim of making it easier to pre-install onshore or to install offshore. The design enables the system to be stacked during shipping for efficient and cost-effective transportation.