Purity Effects (1.2)
Criticality: High
Progress: Addressed, Not Adequately
Score: 20
DOT Relevance: §192.51 – §192.65
Description of Key Area
Purity requirements for hydrogen are most stringent for electronics
industry consumers. Current industrial hydrogen grades are specified by both
CGA (G-5.3 Commodity Specification for Hydrogen) and ISO (14687 Hydrogen
fuel—Product specification) though industrial gas companies often establish
their own grading systems. Vehicular fuel quality is being addressed by SAE and
ISO. SAE has published J2719 “Information Report on the Development of a
Hydrogen Quality Specification for Fuel Cell Vehicles” and is developing a
hydrogen fuel specification though it is anticipated that it will be several
years before one is complete. ISO is developing fuel cell application hydrogen
specifications for incorporation into ISO 14687.
Subpart B (Materials) of 49 CFR 192 “prescribes the minimum
requirements for the selection and qualification of pipe and components for use
in pipelines.”
Discussion of Criticality
It is unclear precisely what the final fuel quality requirements
will be in a more developed hydrogen economy.
Discussion of Progress
Sandia National Labs has identified this as a topic that must be
researched if a full characterization of hydrogen effects on structural
materials can be considered complete.
ASME B31.12 has no plans to incorporate purity issues at the
present time.
Recommendations
Further research is needed on this key topic. Standards for hydrogen
piping materials should take into account hydrogen purity effects. All
standards established should be incorporated by reference into the federal
code.
|