Study of potential leakage on several stressed fittings for hydrogen pressures up to 700 bar

摘要

In order to improve risk analyses and influence the design of the future H_2 systems, an experimental study on "real" leaks qualification and quantification was performed. In H_2 energy applications, fittings appeared as a significant leakage potential and subsequently explosion and flame hazards. Thus, as a part of the "Horizon Hydrogene Energie" French program, four kinds of commercial fittings usually employed on H_2 systems were tested thanks to a new high pressure test bench - designed, setup and operated by INERIS -allowing experiments to be led for H_2 pressures until 700 bar. The fittings underwent defined stresses representative of H_2 systems lifetime and beyond. The associated leaks -when existing - are characterized in terms of flow rate.