Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 266

C. On Fire Protection
1. Only approved Class D extinguishing agents or those tested and
shown to be effective for extinguishing magnesium fires shall be
permitted. A supply of extinguishing agent for manual application
shall be kept within easy reach of personnel while they are working
with magnesium. The quantity of extinguishing agent shall be sufficient
to contain anticipated fires.
2. Dry sodium chloride, or other dry chemicals or compounds suitable for
extinguishment or containment of magnesium fires, shall be permitted
to be substituted for Class D fire extinguishers. All extinguishing
materials shall be approved for use on magnesium fires.
3. Approved fire-extinguishing materials shall be provided for every
operator performing machining, grinding or other processing
operation on magnesium as follows:
a. Within nine hundred fourteen centimeters (914 cm), a supply of
bulk dry extinguishing agents in an approved container with a
hand scoop or shovel for applying the material; or
b. Within two thousand two hundred eighty six centimeters (2,286 cm),
an approved Class D portable fire extinguisher.
Pressurized
extinguishing agents shall be applied carefully on magnesium
powder or chip fire, so as not to disturb or spread the magnesium
powder.
4. Application of wet extinguishing agents accelerates a magnesium fire
and could result in an explosion. The following agents should not be
used as extinguishing agents on a magnesium fire because of adverse
reaction:
a. Water
b. Gaseous-based foams
c. Halon
d. Carbon dioxide
e. Sand and other high Silicon Dioxide (SiO 2 )-containing materials
D. Fire Safety Clearance
A Fire Safety Clearance from City/Municipal Fire Marshal having
jurisdiction shall be obtained for the storage and transportation
magnesium.
250