CGA PS-31 (R2019) PDF

CGA PS-31 addresses the potential negative impact of impurities on proton exchange membrane (PEM) equipment and the steps that may be taken to manage the solid, liquid, and transitional impurities that can be introduced into a hydrogen supply system during the fabrication and installation of a hydrogen supply system.

This position statement does not address the cleanup of gaseous impurities or the need to keep components such as compressors in the hydrogen supply system from contaminating the system due to poor component selection or component degradation during system operation, although the station design shall consider these factors.