Abstract
Thermoplastic or thermoset materials are traditionally used as liners to protect carbon steel substrates or as part of multilayer non-metallic pipe. The performance of metallic materials and the barrier properties to gaseous hydrogen are of interest as well as the potential for ageing of the polymers on exposure. A methodology will be proposed for screening of the materials as well as final products such as polymer lined pipe or thermoplastic composite pipe. Parallels will be drawn with industry established standards previously used for traditional oil and gas fluids.