A. Stationary filling stations for motor vehicles (facilities that fill motor vehicles with natural gas supplied via pipeline or tank lorry that is compressed in the facilities (Continued).
18. Emergency beakaway
(a) An emergency beakaway shall be installed on the ground or support to cut off gas flow in case that a vehicle moves while a filling hose is in connection.
(b) An emergency breakaway shall be provided to each dispenser.
(c) An emergency breakaway shall be separated by horizontally pulling force less than 666.4N (68 kg f).
(d) A 90° rotating manual valve shall be provided between the emergency beakaway and the dispenser where a dispenser operator can easily access to the valve.
19. Gas detection devices
(a) Gas detection devices shall be so constructed as to detect gas leak, trigger alarm sound, and cut off gas flow path automatically.
(b) The concentration shall be set below 1.25% at which emergency shutdown signal is generated.
(c) Gas detection devices shall be installed at the following places:
① Near compressor package,
② Near storages,
③ Inside the individual dispenser, and
④ Near the pipe joints (excluding weld joints) in closed pits.
(d) The number of installed gas detection devices shall be not less than that specified below:
① More than one around the compressor package or inside dispenser,
② Two around the storage, and
③ One for every pipe joint within 10 meters from it.
20. Explosion-proof construction of electrical devices
The electrical devices installed and used in filling facilities shall have explosion-proof construction in compliance with the Notification of MOCIE.
21. Static electricity removal
Filling facilities shall be provided with static electricity removing devices in compliance with the Notification of MOCIE.
22. Uninterrupted power supply systems (UPS)
UPS shall be provided to prevent the loss of the functionalities of filling facilities by power supply failure, in compliance with the Notification of MOCIE.
23. Dispensers
(a) Dispensers shall be fixed on the ground.
(b) Dispensers shall be provided with automatic gas flow cut-off devices activated when the pressure in the compressed natural gas tank of a CNG vehicle being filled reaches the maximum allowable filling pressure.
24. Communication equipment, standard pressure gauge, fire extinguisher, etc.
(a) Gas filling stations shall be equipped with communication equipment for emergency report, suitable for the scale and construction of the station.
(b) Gas filling stations shall have more than 2 standard pressure gauges.
(c) Fire extinguishers of Class 20-B:C or above shall be provided around filling facilities.
(d) The windows of the gas station buildings shall be glazed with wired glass or safety glass.
