27 October 2026

Hydrogen pipework testing must establish that fabricated assemblies meet their approved specification before they enter service. Pressure testing, leak testing and weld inspection serve different purposes. Passing one examination does not automatically demonstrate compliance with every requirement of a hydrogen installation. For engineering managers, contractors and project teams, the starting point is an agreed inspection

Material selection is fundamental to the integrity of gaseous hydrogen pipework. A grade suitable for conventional process systems may require further assessment when exposed to hydrogen, particularly where operating pressure, repeated pressure cycles or welded joints introduce additional risks. This guide explains how stainless steel and carbon steel behave in hydrogen service, the importance of