Design of hydrogen fueling components is critical for safety and reliability. Intensive usage of suchcomponents in urban public environment is expected in the near future. Any leakage of gas or failureof equipment will create potential hazards. Materials for such category of equipment must havespecific mechanical characteristics, including hardness (influence on the durability of the equipmentand on the resistance to hydrogen) and be easy to machine. Air Liquide has developed a test programfor qualifying equipment representing the present state of the art. Studies on the susceptibility ofvarious steels to hydrogen embrittlement have been done. Test specimens were exposed to static andcyclic loads with hydrogen and an inert gas, the inert gas representing a reference. Various tests aredescribed here. As a result, the importance of further development in the design and selection ofappropriate materials for critical hydrogen components is required. Various options are presented anddiscussed.