Mich. Admin. Code R. 325.2442c - Respiratory protective equipment; supplies and components
Rule 42c.
(1)
Compressed or liquid oxygen used with respiratory protective equipment shall be
of high purity. Compressed oxygen shall not be used in supplied-air respirators
or in open-circuit self-contained breathing apparatus that have previously used
compressed air.
(2) Air may be
supplied to equipment from cylinders or air compressors with proper pressure
regulation and control. Air shall contain 19-23% oxygen and not more than 20
ppm carbon monoxide and 5 mg/m3 oil mist.
(3) A compressor or compressor air intake
shall be situated so as to prevent entry of contaminants into the system in
amounts which may be injurious to the health of an exposed person.
(4) An oil lubricated compressor shall
incorporate suitable inline air purifying sorbents and filters, temperature
regulators, and high-temperature cut-off to assure breathing air quality. An
oil lubricated compressor shall not use vegetable oil lubricants.
(5) An air-line coupling or connector shall
be incompatible with outlets for other gas systems to prevent connection with
nonrespirable gases or oxygen.
(6)
A self-contained breathing apparatus and universal type gas mask shall
incorporate an audible or visible alarm or window to indicate impending failure
of the device to provide respirable air. It is recommended that warning be
given when 20-25% of rated service time remains.
Notes
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