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The Compressed Gas Association (CGA) is an American trade association for the industrial and medical gas supply industries. [2] The CGA publishes standards and practices that codify industry practices. In cases where government regulation is inspecific, CGA documents are considered authoritative.
Compressed natural gas (CNG) is a fuel gas mainly composed of methane (CH 4), compressed to less than 1% of the volume it occupies at standard atmospheric pressure.It is stored and distributed in hard containers at a pressure of 20–25 megapascals (2,900–3,600 psi; 200–250 bar), usually in cylindrical or spherical shapes.
The Diameter Index Safety System, or DISS, was designed by the Compressed Gas Association specifically for medical gases at 200 psig or less. It uses unique, gas-specific threaded connections to fit equipment to station outlets.
The BCGA represents companies that make, supply or distribute industrial, medical and food gases in the UK, who sell related equipment, install distribution systems and who are providers of specialist health, safety, quality, inspection and training services. It represents the interests of 100+ member companies.
The American Standard Safety System, or ASSS, is a connection system for gas cylinders with a volume exceeding 25 cubic feet. The connections differ in thread type and size, right and left-handed threading, internal and external threading, and nipple-seat design.
Related services and technology can be supplied such as vacuum, which is often provided in hospital gas systems; purified compressed air; or refrigeration. Another unusual system is the inert gas generator. Some industrial gas companies may also supply related chemicals, particularly liquids such as bromine, hydrogen fluoride and ethylene oxide.
Laboratory standard for compressed gas Is a gas or mixture of gases in a container having an absolute pressure exceeding 40 pounds per square inch (psi) at 70 °F (21.1 °C); or [ 10 ] Is a gas or mixture of gases having an absolute pressure exceeding 104 psi at 130 °F (54.4 °C) regardless of the pressure at 70 °F (21.1 °C); or [ 10 ]
A gas is a substance which (a) at 50 °C (122 °F) has a vapor pressure greater than 300 kPa (43.51 PSI) or (b) is completely gaseous at 20 °C (68 °F) at a standard pressure of 101.3 kPa (14.69 PSI). Gases are assigned to one of three divisions division 2.1 Flammable gas; division 2.2 Non flammable, Non-toxic gas; division 2.3 Toxic gas