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All fixed systems using dry chemical as the extinguishing agent, installed to
meet a particular OSHA standard
must comply with CFR 1910.160 and 1910.161. The following is a list of specific
requirements pertaining to CFR 1910.161.
- Dry chemical agents must be compatible with any foams or wetting agents with which they
are used.
- When dry chemical discharge may obscure vision, a pre-discharge employee alarm is
required which complies with 1910.165 and which will give employees time to safely exit
from the discharge area prior to system discharge.
- The rate of application of dry chemicals must be such that the designed concentration of
the system will be reached within 30 seconds of initial discharge.
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