DNV releases standard for hybrid TCPs10 May 2024

(Image credit: DNV)

​DNV has released a standard for thermoplastic composite flexible pipes (TCPs) to address the challenges faced by conventional risers in deepwater applications.

TPCs have been challenging traditional steel pipes in the last decade by offering a light, ductile, spoolable and corrosion-free solution for transportation of liquids and gases.

The primary objective of the DNV-ST-F207 standard is to facilitate the integration of technologies, such as carbon fibre armour into flexible riser designs. By qualifying these technologies and ensuring their adherence to recognised international standards, specifically API Spec 17J and DNV-ST-F119, DNV aims to enhance the safety and efficiency of deepwater projects. The new standard merges different design methods (Working Stress Design and Load and Resistance Factor Design or partial safety factor) into a unified approach. Through this consolidated method, components are made to withstand different kinds of stresses, and extensive tests will ensure they meet safety standards under specific conditions.

"Overall, this initiative reflects a commitment to advancing technology in the offshore industry, ensuring the highest standards of safety, efficiency, and sustainability in deepwater projects thanks to our expertise and the dedication of our global teams of specialized experts," said Prajeev Rasiah, executive vice president & regional director Northern Europe, energy systems at DNV (pictured).

By incorporating carbon fibre armour elements, risers are expected to become lighter, resulting in lower top tension. Furthermore, carbon fibre is said to exhibit superior resistance to degradation in aggressive environments.

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