Ever wondered what those mysterious publication codes mean?

If you’ve explored a CGA publication, you’ve likely noticed each publication has a unique alphabetical and numerical identifier. These codes aren’t just random—they can help you quickly identify the content of the publication!

The identifiers consist of single-letter codes for standards and guidelines grouped into broad technical categories and double-letter codes for technical and educational resources such as alerts, bulletins, position statements, training materials, and reports.

Single-Letter Identifiers

C = Cylinders
Publications on steel, aluminum, and composite cylinders, including methods for pressure testing, requalification, inspection, marking, change of gas service, and internal corrosion.

E = Equipment
Resources related to equipment such as hoses, hose connections, regulators, flowmeters, and orifice flow selectors.

F = Food Gases
Publications addressing food gases, good manufacturing practices, hazard analysis and risk-based preventative controls, and supplier qualifications for food and beverage gas distributors.

G = Gases
Publications covering various gases like acetylene, ammonia, oxygen, hydrogen, carbon dioxide, helium, nitrogen, and more, along with related equipment and processes.

H = Hydrogen
Publications focused on hydrogen, including topics like cryogenic hydrogen storage, hydrogen fuel technologies, bulk hydrogen supply systems, and steam reformer operations.

M = Medical Gases
Resources on medical gases, including their use in different facilities, system designs, analytical method validation, and quality management systems.

P = Protection & Safe Handling
Publications covering the safe handling, use, storage, transfilling, and practices for compressed gases, including topics like oxygen-deficient atmospheres, hazard communication, and process safety management.

S = Safety Devices
Publications that provide guidance on safety devices, including Pressure Relief Devices (PRDs) and other related equipment.

V = Valves & Valve Connections
Resources on various types of valves, valve connections, transfer connections, leak detection, marking requirements, and torque guidelines.

Double-Letter Identifiers

PS = Position Statements
Documents outlining CGA’s official position on specific subjects, typically used to communicate with regulators, code developers, or other external organizations.

SA = Safety Alerts
Publications issued to quickly notify of imminent dangers resulting from incidents or hazardous situations. These alerts are posted to CGA’s website free of charge.

SB/TB = Safety Bulletins/Technical Bulletins
Publications that include enforceable language or guidance, usually 2 to 3 pages long. There is an ongoing effort to transition these bulletins into standards or guidelines.

TM = Training Materials
Resources aimed at teaching compliance with CGA standards or communicating guidance, generally for non-experts. Examples include safety posters, videos, and eLearning modules.

TR = Technical Reports
Reports documenting research or testing that verify or establish CGA’s positions on various technical matters.

Explore Our Full Library

Curious to see how these publications can help your work or stay informed on industry best practices? Visit CGA’s publications page to access a complete list of resources and explore the wealth of knowledge we provide to support safety and innovation in the gas industry.