Tenaris line pipe qualified for hydrogen transport at 200 bar

Pressurized pipelines are seen as one means of hydrogen transport. With this in mind, Tenaris has carried out an experimental activity to qualify medium- and large-diameter pipes for high-pressure gaseous hydrogen transportation with a hydrogen content of up to 100% at 200 bar.

Tenaris Pipeline Technology Senior Director and Chairman of the DNV H2PIPE joint industry project on hydrogen pipelines, Philippe Darcis, explains that “due to the susceptibility of steel to hydrogen embrittlement the pipeline material needs to be qualified to demonstrate its readiness for hydrogen transportation and the new standards and guidelines require specific characterizations in gaseous hydrogen environments.”

Knowing reaction is fundamental

In fact, hydrogen atoms can easily diffuse into the metal’s crystalline lattice due to their small size. The interaction with the metal’s microstructure can eventually result in the degradation of the metal’s mechanical properties, mainly involving a loss in mechanical ductility, reduced fracture toughness and loss of fatigue resistance. Purity, temperature, and pressure can affect the severity of the embrittlement. Thus, it is fundamental to determine how new and existing pipeline materials will react to the different compositions, pressures, and temperatures that they will operate under.

Tenaris is addressing the need for reliable and high-performance materials in hydrogen environments with the development of THera™, a new technology that offers a long-lasting and completely recyclable material with a verified product lifecycle, thanks to material testing in pressurized hydrogen environments.

“The experimental activity we carried out to qualify seamless and UOE LSAW pipes of up to grades X70, according to ASME B31.12 requirements, demonstrates the potential of THera™ solutions for hydrogen pipeline transportation of up to 200 bar with an extra safety margin,” said Philippe Darcis.

HTW Editorial Team

HTW Editorial Team

News brought to you by our editorial team. We are a knowledge platform – driving technology to the global hydrogen community. If you wish to contribute your press, please contact us.