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 314