30 CFR § 75.1101-5 Installation of foam generator systems.
(a) Foam generator systems shall be located so as to discharge foam
to the belt drive, belt takeup, electrical controls, gear reducing unit and
the conveyor belt.
(b) Foam generator systems shall be equipped with a fire sensor which
actuates the system, and each system shall be capable of producing and
delivering the following amounts of foam within 5 minutes:
(1) At fire-resistant belt installations, an amount which
will fully envelop the belt drive, belt takeup, electrical controls, gear
reducing unit, and the conveyor belt over a distance of 50 feet; and,
(2) At nonfire-resistant belt installations, an amount
which will fully envelop the belt drive, belt takeup electrical controls,
gear reducing unit, and the conveyor belt over a distance of 150 feet.
(c) The foam generator shall be equipped with a warning device
designed to stop the belt drive when a fire occurs and all such warning
devices shall be capable of giving both an audible and visual signal when
actuated by fire.
(d) Water, power, and chemicals required shall be adequate to
maintain water or foam flow for no less than 25 minutes.
(e) Water systems shall include strainers with a flush-out connection
and a manual shut-off valve.
U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939 www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401