This publication specifies requirements for regulators used with compressed gases to reduce the supply pressure from a storage cylinder, pipeline, or other source to the use pressure.
This publication contains design and manufacturing requirements relating to materials, construction, performance, test procedures, information, marking, and packaging of pressure regulators. Appendix A provides information relating to regulator flow capacity calculations. For pressure regulators used with medical gases, additional requirements are specified in CGA E-7, Medical Gas Pressure Regulators, Flowmeters, and Orifice Flow Selectors.
This publication does not apply to liquefied petroleum gas (LPG) pressure regulators for equipment intended for installation and use in accordance with the requirements of NFPA 58, Liquefied Petroleum Gas Code.
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