Small-scale testing qualification for tensile armour wires in CO2-SCC environments
Joint industry project
Advancing a unified methodology for assessing CO₂SCC susceptibility in tensile armour wires
This JIP adopts a systematic approach to develop a testing methodology for evaluating the susceptibility of tensile armour wires in flexible pipelines to CO2-induced stress corrosion cracking (CO2-SCC). Leveraging the combined experience of DNV and its partners, the project aims to produce a comprehensive guideline for qualifying tensile armour wires used in flexible pipelines exposed to CO2-rich environments. This initiative will deepen the industry's understanding of material behaviour, strengthen the safety framework for flexible pipes operating in CO2 conditions, and provide robust support for managing CO2-SCC risks effectively.
Key focus:
- Mitigate the risk of flexible pipeline failure by CO2-SCC
- Reduce time and costs related to small-scale testing
- Develop a small-scale testing methodology for CO2-SCC susceptibility assessment
- Establish a widely accepted industry methodology
- Adopt a “pass/no pass” testing approach.
Project scope
The technical scope of this project is designed to establish a structured framework for assessing the behaviour of carbon steel armour wires in CO2-rich environments, supporting the development of a robust testing methodology for CO2-SCC susceptibility. This will be achieved through a comprehensive test matrix built around testing different material grades and critical test parameters. To ensure reliability and comparability, the testing program will be carried out in two laboratories – INT and LAMEF. While the focus of this framework is on generating material-level insights that underpin a rigorous qualification methodology of armour wires, the qualification of complete flexible pipelines and mid‑ or full‑scale pipe testing remain outside the scope of this project.
For more detailed information about this joint industry project: download the flyer.
Project timeline
The project timeline is structured into three sequential work packages that will guide its development over a three year period, following the kick off held in January 2026.
The project team accepts additional partners who would like to contribute to and benefit from this industrywide collaboration. Late entry on equal conditions is possible until the end of Q1 2026.
JIP partners
The JIP is supported by a group of industry partners, including DNV, Baker Hughes, INT, LAMEF, NOV, Petrobras, and TechnipFMC, each contributing specialized expertise to the project’s objectives.