Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 338

ii. Storage shall be limited to not more than two hundred eighty
three cubic meters (283 m 3 ) of natural gas in each building or
room.
Exception:
containers.
CNG stored in vehicle-mounted fuel supply
iii. Deflagration (explosion) venting shall be provided in exterior
walls or roof only.
iv. Rooms within or attached to other buildings shall be
constructed of non-combustible or limited-combustible
materials. Interior walls or partitions shall be continuous from
floor to ceiling, shall be securely anchored, and shall have a fire
resistance rating of at least two (2) hours. At least one wall shall
be an exterior wall.
v. Indoor locations shall be ventilated utilizing air supply inlets and
exhaust outlets arranged to provide uniform air movement to
the extent practical. Inlets shall be uniformly arranged on
exterior walls near floor level. Outlets shall be located at the
high point of the room in exterior walls or the roof. A ventilation
system for a room within or attached to another building shall
be separate from any ventilation system for the other building.
vi. Ventilation shall be by a continuous mechanical ventilation
system or by a mechanical ventilation system activated by a
continuously monitoring natural gas detection system where a
gas concentration of not more than one-fifth (1/5) of the lower
flammable limit is present. The ventilation rate shall be at least 1
m3/min·12 m3 of room volume. In either case, the system shall
shut down the fueling system in the event of failure of the
ventilation system. Reactivation of the fueling system shall be
by manual restart and shall be conducted by trained personnel.
vii. Where installed, a gas detection system shall be equipped to
sound an alarm and visually indicate when a maximum of one-
fifth (1/5) of the lower flammable limit is reached.
viii. Buildings and rooms used for compression, storage, and
dispensing shall be classified in accordance with Table 28. No
electrical sources of ignition, other than electrical installations as
permitted by the preceding provision, shall be permitted.
ix. Pressure relief devices on storage systems shall have pressure
relief device channels to convey escaping gas to the outdoors
and then upward to a safe area to prevent impinging on
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