Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 375

unless the air feed system is provided with a mechanical shut off
device that shall be activated to effectively eliminate airflow
once the mechanical alarm system required above is actuated.
15. Dipping and coating processes of over five hundred seventy liters
(570 ℓ) capacity or ninety three hundredths square meters (0.93 m 2 )
liquid surface area and containing liquids having a flash points above
93°C
shall be protected with an approved automatic fire
extinguishing system.
16. Covers arranged to close automatically in the event of fire shall be
actuated by approved automatic mechanical devices and shall be
arranged for remote manual operation.
17. Covers shall be made of non-combustible materials with overlap sides
by at least twenty-five millimeters (25 mm) and have a recess or
flange that extends downward around the tank when it is closed.
18. Chains or wire ropes shall not be used to support the cover or
operating mechanism where the burning of a cord could interfere
with the action of a device. All pulleys, catches, and other fasteners
shall be made of metal and shall be attached to noncombustible
mountings.
19. Dipping and coating process areas shall be provided with
mechanical ventilation that is capable of confining the vapor area to
not more than one thousand five hundred twenty five millimeters
(1525 mm) from the vapor source and removing the vapors in a safe
location. The concentration of the vapors in the exhaust stream of
the ventilation system shall not exceed twenty five percent (25%) of
the lower flammable limit. However, if the physical size of a process
does not allow adequate removal of vapors by mechanical
ventilation alone, a properly designed enclosure shall be provided
and the ventilation shall be capable of confining all vapors to the
enclosure.
B. Operation
1. Mechanical ventilation shall be kept in operation at all times while
dipping and coating processes are being conducted and for a
sufficient time thereafter to allow all vapors to be exhausted until the
vapor area no longer constitutes a vapor source. Where dipping and
coating processes are conducted automatically without an
attendant constantly on duty, the operating controls shall be
arranged so that the apparatus cannot function unless the exhaust
fans are operating.
2. Flow coat operations shall conform to the requirements for dipping
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