CGA’s Expanding Role in the Hydrogen Energy Revolution

What’s unique about CGA membership and our focus on hydrogen mobility?

Members of the Compressed Gas Association (CGA) are global leaders in the production, storage, distribution, and application of hydrogen and other industrial gases. We are recognized around the world in forums such as ISO, NFPA, and the United Nations as subject matter experts on industrial gases technical and safety practices. Our standards are frequently adopted by national and international regulatory, code, and standards bodies.

In addition to our existing library of hydrogen standards, we are bringing our unique expertise in hydrogen to the development of new standards for emerging applications in the hydrogen-powered transportation space to ensure our members are at the forefront of this energy revolution.


CGA has maintained a focus on hydrogen for many years. This has taken the form of safety publications dealing with the production, transport, storage, and use of hydrogen, primarily in an industrial setting. In recent years, the response to climate change and the growing need to decarbonize the global economy have increased the importance of hydrogen as it moves from primarily industrial uses to more consumer level applications.

We are committed to continuing to take a leadership role in hydrogen, not only in industrial uses but at the near-consumer level. Senior level personnel from CGA member companies, together with CGA staff, are assessing existing hydrogen safety information and regulations, identifying gaps where current literature is inadequate to address hazards in the production, storage, transport, and use of hydrogen, or where regulations impede its expanding use – and implementing plans to fill those gaps.

A Key Area of Focus: Hydrogen Mobility

CGA provides thought leadership and technical expertise focused on transportation, particularly on hydrogen fuel cell electric vehicles (FCEVs).


More efficient than conventional internal combustion engine vehicles, FCEVs produce no tailpipe emissions other than water. The use of fuel cells in forklifts is already well-established, and development of passenger FCEVs is well underway. Initial efforts in medium and heavy-duty trucking hydrogen FCEVs adoption are on the rise.

One critical gap exists in support infrastructure – green hydrogen supply – which is currently lagging.


Hydrogen liquefaction and gaseous compression are well understood by the industry, with several harmonized publications in existence.

Delivery & Storage

Liquid and gaseous hydrogen delivery and storage are well understood by the industry. Additional standards are needed for hydrogen refueling. At the same time, hazardous materials transportation regulations impose barriers in some jurisdictions that must be addressed. Further standards development is also needed in support of geologic storage.

Systems & Infrastructure

Small-scale integration of green hydrogen production with compression and storage requires further standardization. Guidance on modular approaches to fueling station design and operation – including connectors and safety interlocks – also needs to be developed. In addition, there are siting issues that need to be resolved, including setback distances, “occupancy” requirements, and canopies over refueling sites.

CGA’s Growing Library of Hydrogen Safety Publications

The following CGA safety publications focus on hydrogen, with additional standards in development.

CGA G-5, Hydrogen (8th Edition)

CGA G-5.3, Commodity Specification for Hydrogen (7th Edition)

CGA G-5.4, Standard for Hydrogen Piping Systems at User Locations (6th Edition)

CGA G-5.5, Hydrogen Vent Systems (3rd Edition)

CGA G-5.6, Hydrogen Pipeline Systems (1st Edition)

CGA H-1, Service Conditions for Portable, Reversible Metal Hydride Systems (2nd Edition)

CGA H-2, Guideline for Classification and Labeling of Hydrogen Storage Systems with Hydrogen Absorbed in Reversible Metal Hydrides (2nd Edition)

CGA H-3, Standard for Cryogenic Hydrogen Storage (3rd Edition)

CGA H-4, Terminology Associated with Hydrogen Fuel Technologies (3rd Edition)

CGA H-5, Standard for Bulk Hydrogen Supply Systems (an American National Standard) (2nd Edition)

CGA H-10, Combustion Safety for Steam Reformer Operation (2nd Edition)

CGA H-11, Safe Startup and Shutdown Practices for Steam Reformers (2nd Edition)

CGA H-12, Mechanical Integrity of Syngas Outlet Systems (1st Edition)

CGA H-13, Hydrogen Pressure Swing Adsorber (PSA) Mechanical Integrity Requirements (1st Edition)

CGA H-14, HYCO Plant Gas Leak Detection and Response Practices (1st Edition)

CGA H-15, Safe Catalyst Handling in HYCO Plants (1st Edition)

CGA P-28, OSHA Process Safety Management and EPA Risk Management Plan Guidance Document for Bulk Liquid Hydrogen Systems (4th Edition)

CGA PS-31, CGA Position Statement on Cleanliness for Proton Exchange Membranes Hydrogen Piping/Components (1st Edition)

CGA PS-33, CGA Position Statement on Use of LPG or Propane Tank as Compressed Hydrogen Storage Buffers (1st Edition)

CGA PS-46, CGA Position Statement on Roofs Over Hydrogen Storage Systems (1st Edition)

CGA PS-48, CGA Position Statement on Clarification of Existing Hydrogen Setback Distances and Development of New Hydrogen Setback Distances in NFPA 55 (1st Edition)

New Publication Currently in Development

CGA H-XX, Small Scale Hydrogen Production and Delivery

Work with Us to Advance Hydrogen’s Future

We invite companies operating across the hydrogen supply chain – in the production, transport, storage, and use of hydrogen – to consider joining CGA. Come work alongside your industry colleagues, as we help write the future of the hydrogen revolution, while preserving the safety of our employees and communities.

For details about membership benefits, qualification criteria, and to apply, please see the Membership section of our website.