Compressed Breathing Air and Systems
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Compressed breathing air and systems protect workers engaged in tasks that may affect the quality of the breathing air in their work environment. This standard sets out the minimum requirements for the purity of compressed breathing air supplied to service outlets, and for breathing air systems required to produce, store and distribute such air including design, construction, testing commissioning, operation and maintenance of components. In addition, it provides requirements for compressed breathing air systems that supply compressed breathing air along with accepted respirators.
This Standard provides the minimum requirements, unless otherwise specified by the authority having jurisdiction, for the purity of compressed breathing air supplied to the service outlet and for breathing air systems required to produce, store, and distribute such air.
This Standard is limited to compressed breathing air and compressed breathing air systems used in the following applications:
(a) supplied-air respirators;
(b) supplied-air suits;
(c) self-contained breathing apparatus (SCBA) (open-circuit); and (d) other applications for which qualified persons deem it appropriate to reference the compressed breathing air purity requirem ents described in this Standard.
(1) The quality requirements for breathing gas in closed-circuit SCBA are addressed in CSA Standard CAN/CSA-Z94.4.
(2) For diving operations, refer to CSA Standard CAN/CSA-Z275.2.
This Standard includes requirements applicable to the design, construction, testing, commissioning, operation, and maintenance of components for compressed breathing air systems that supply compressed breathing air.
The values given in SI (metric) units the standard. The values given in parentheses are for information only.
In this Standard, the word shall indicates the minimum mandatory requirement; should indicates a recommended good practice that is advised but is not mandatory. Notes accompanying Clauses provide explanatory or informative material t hat is not properly a part of this Standard.