Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 373

trapped overflow pipe leading to a safe location.
e. The connection of the overflow pipe to the tank shall be made
not less than one hundred and fifty two millimeters (152 mm)
below the top of the tank.
4. Dipping and coating tanks that exceed one thousand eight hundred
nine five liters (1,895 ℓ) in liquid capacity shall be equipped with
bottom drains automatically and manually arranged/operated to
quickly drain the tank in the event of fire, unless the viscosity of the
liquid at normal atmosphere makes this impractical.
Manual
operation shall be from a safe and accessible location. Where
gravity flow is not practicable, automatic pumps shall be provided.
5. Such drains shall be trapped and discharged to a closed, properly
vented salvage tank or to a safe outside location.
6. The diameter of the bottom drain pipe or pipes shall be sized to
empty the dipping and coating tank within five (5) minutes, but in no
case shall be less than that indicated in Table 31:
Table 31: DIAMATER OF BOTTOM DRAIN
PIPES, BY TANK CAPACITY
Pipe diameter
(cm)
8
10
13
15
20
Tank capacity
(liters)
1900 to 2850
2851 to 3800
3801 to 9500
9501 to 15000
Over 15000
7. Where salvage tank or tanks are employed, their capacity shall be
greater than the capacity of the dipping and coating tanks to which
they are connected. Pumping arrangement shall be provided for the
retrieval of the contents. The salvage tanks shall be emptied before
the dipping and coating tank is refilled.
8. Dipping and coating process utilizing conveyor systems shall be
arranged to automatically stop or cease motion in the event of fire
and if the required rate of ventilation is not maintained.
9. Open flames, spark-producing equipment/devices, or equipment
whose exposed surfaces exceed the auto-ignition temperature of
dipping or coating liquid, shall not be located in the process area
unless the said equipment or apparatus is of totally enclosed type
and construction to prevent the escape of sparks or particles of hot
metal.
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