Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 369

20. Unless the spray booth exhaust duct terminal is from a water-wash
spray booth, the terminal discharge point shall be not less than one
and eight tenths meters (1.80 m) from any combustible exterior wall or
roof, nor discharge in the direction of any combustible construction or
unprotected opening in any noncombustible exterior wall within seven
and six tenths meters (7.60 m).
21. Exhaust ducts without dampers are preferred. However, if dampers
are installed, exhaust ducts shall be maintained so that they will be in a
full open position at all times the ventilating system is in operation.
22. Exhaust ducts shall have a clearance from unprotected combustible
construction or material of not less than forty-five centimeters (45 cm).
If combustible construction is provided with the following protection
applied to all surfaces within forty-five centimeters (45), clearance
may be reduced to the distances indicated in Table 30:
Table 30: CLEARANCE REQUIRED FROM EXHAUST DUCTS AND UNPROTECTED
COMBUSTIBLE CONSTRUCTION FOR SPRAY BOOTHS, BY TYPE OF PROTECTION USED
Protection Used
Gauge 28 sheet metal on ¼ -inch asbestos millboard.
Gauge 28 sheet metal on 1/8-inch asbestos millboard
space out 1 inch (2.54 cm) on noncombustible spacers.
Gauge 22 sheet metal on 1-inch (2.54 cm) coated
batts reinforced with wire mesh or the equivalent.
Where ducts are protected with an approved automatic
sprinkler system, the clearance required in section “V” of
this section may be reduced.
Clearance required
cm
in
30.48
12
22.86 9
7.62 3
15.24 6
23. Air exhaust from spray operations shall not be directed so that it will not
contaminate makeup air being introduced into the spraying area or
other ventilating intakes.
24. Exhaust ducts shall be permitted to be round, rectangular, or other
suitable shape. They shall be provided with doors, panels or other
means to facilitate inspection, maintenance, cleaning and access to
fire protection devices.
25. Containers supplying spray nozzles shall be of closed type or provided
with closed metal covers. Containers not resting on floors shall be on
non-combustible supports or suspended by wire cables. Containers
supplying spray nozzles by gravity flow shall not exceed thirty eight
liters (38ℓ) capacity.
26. All containers or piping to which a hose or flexible connection is
attached shall be provided with a shut-off valve at the connection.
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