Preface
This is the second edition of CSA Standard Z305.3 (now CAN/CSA-Z305.3), Pressure Regulators, Gauges and Flow-Metering Devices for Medical Gases. It supersedes the first edition, published in 1979, with the continuing goal of ensuring the safety of pressure regulators, gauges, and flow-metering devices. Minimum requirements are given in this Standard for construction and performance.
1. Scope
1.1 This Standard applies to all pressure regulators, gauges, and flow-metering devices for medical gases in health care facilities and prescribed domiciliary use, eg,
(a) in medical gas systems;
(b) on anaesthetic machines, lung ventilators, portable oxygen therapy equipment, or other therapeutic, diagnostic, research, or teaching equipment.
Note: Users of this Standard should refer to CSA Standards CAN3-Z168.3, CAN3-Z168.5, CAN3-Z168.7, and CAN3-Z305.1 for other applicable requirements.
1.2
This Standard includes construction, performance, and labelling requirements as well as requirements for the correct application of pressure regulators, gauges, and flow-metering devices in medical gas systems or on anaesthetic machines, lung ventilators, or other therapeutic, diagnostic, research, or teaching equipment.
1.3
The purpose of this Standard is
(a) to ensure the safe performance and construction of pressure regulators, gauges, and flow-metering devices; and
(b) to minimize hazards resulting from the use of pressure regulators, gauges, and flow-metering devices with medical gases under pressure.
1.4
This Standard contains two parts as follows:
(a) Part I contains requirements relating to construction, performance, information on, and marking of pressure regulators, gauges, and flow-metering devices (see Clauses 3 through 6); and
(b) Part II contains requirements relating to the use of pressure regulators and flow-metering devices (see Clause 7).
Note: The values given in parentheses are provided for information purposes only.
