Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 330
rated service pressure without structural failure. The fabrication and
testing shall be in accordance with ANSI/ASME B31.3, “Chemical Plant
and Petroleum Refinery Piping”. Piping components such as strainers,
snubbers, and expansion joints shall be permanently marked by the
manufacturer to indicate the service ratings.
7. Valves or shutoff valves shall have a rated service pressure not less
than the rated service pressure of the entire system and shall be
capable of withstanding a hydrostatic test of at least four times the
rated service pressure without rupture. Leakage shall not occur at not
less than one-and-a-half (1.5) times the rated service pressure, using
dry air as the test medium. The valve body shall bear the permanent
marking of “CNG”, service ratings and ASTM or internationally
accepted standards adopted by the manufacturer.
8. Hose, metallic hose, flexible metal hose, tubing, and their connections
shall be resistant to corrosion and exposure to natural gas and can
resist the most severe pressures and temperatures expected under
normal operating conditions with a burst pressure of at least four (4)
times the service pressure. Hose and metallic hose shall be distinctly
marked by the manufacturer indicating its name or trademark,
applicable service identifier, and design pressure.
9. Vehicle fuelling connection devices shall be of the approved type
complying with applicable ASME Code and other internationally
accepted standards. The use of adapters shall be prohibited.
B. Engine Fuel Systems
1. Storage and Installation
a. The storage, installation, inspection, testing, repair and
maintenance, and safety measures of CNG fuel supply systems for
vehicular internal combustion engines shall comply with NFPA 52,
Vehicular Fuel Systems Code, manufacturer’s instructions and other
internationally accepted standards.
b. Aluminum or copper pipe, tubing, or fittings shall not be used
between the fuel container and the first-stage pressure regulator.
c. Fuel supply containers its piping, fittings, and valves located within,
below or above the driver or passenger compartment shall be
protected with a means to prevent damage that can occur due to
road hazards, loading, unloading, direct sunlight, exhaust heat,
and vehicle use including accidental cargo leakage.
d. No portion of a fuel supply container or container appurtenance
shall be located ahead of the front axle or behind the point of
attachment of the rear bumper to the vehicle. Container valves
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