The Compressed Gas Association (CGA) is an American

trade association A trade association, also known as an industry trade group, business association, sector association or industry body, is an organization founded and funded by businesses that operate in a specific Industry (economics), industry. An industry tra ...

for the industrial and medical gas supply industries. The CGA publishes standards and practices that codify industry practices. In cases where government regulation is inspecific, CGA documents are considered authoritative. CGA falls into a group of

s whose publications are relied on by government. These groups include the

National Fire Protection Association The National Fire Protection Association (NFPA) is an international nonprofit organization devoted to eliminating death, injury, property and economic loss due to fire, electrical and related hazards. As of 2018, the NFPA claims to have 50,000 mem ...

(NFPA) and

ASTM International ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, a ...

. For example, the state of Montana, the U.S. Army, and OSHA point to CGA documents for regulatory guidance.

Cylinder valve openings

The CGA provides detail specifications for the outlet connections of gas containers. They are based on the characteristics of the gas and the storage pressure. flammability, toxicity, state (permanent gas or liquified) and corrosiveness of the gas. These connections are identified by a 3-digit number, such as CGA-555. The range of available connection standards covers the majority of the range of industrial, ultra-pure and medical gases in use, including the medical pin index safety system, scuba cylinder valves and

liquefied natural gas Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane, C2H6) that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the v ...

for home use. The standards include: * CGA V-1 Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections * CGA V-7 Standard Method of Determining Cylinder Valve Outlet Connections for Industrial Gas Mixtures * CGA V-7.1 Standard Method of Determining Cylinder Valve Outlet Connections for Medical Gases

References

External links

* {{Authority control Business organizations based in the United States Industrial gases