Figure 6-5.—Supplied-air system.
Figure 6-6.—Self-contained breathing apparatus
(SCBA).
injury may result if the respirator or its air line fails.
The self-contained breathing apparatus (SCBA)
(fig. 6-6) provides protection in oxygen-deficient
environments or other environments dangerous to
life or health. Since the SCBA is the most complex
respirator in use today, use it only after receiving
proper training in its use. Use the oxygen breathing
apparatus (OBA) only in emergency situations. Use
Mark V gas masks only for protection against
chemical warfare agents and high airborne
radioactivity levels. Surgical masks are for medical
use only; never use them in place of a filter
respirator.
IDENTIFICATION
OF RESPIRATOR CARTRIDGES
AND GAS MASK CANISTERS
Each air-purifying respirator cartridge type is
designed specifically for the class of contaminant it
removes. Federal regulations require each cartridge
type to be color-coded. The color-coding may be in the
form of an affixed label or a colored plastic cartridge
case. To identify the type to be worn for protection
against a
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