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).
3. Protective walls
Protective walls shall be provided between compressors
and dispensers, and storages and dispensers. Provided,
however, that such protective walls are exempted in case that the
protective walls are provided in compliance with Item (1)(a).
4. Boundary signs and boundary fences
The stations, compressor packages, and storages shall be provided with boundary signs and fences in compliance with the Notification of MOCIE. Provided, however, that the boundary fences of the compressor package and storages which are provided with the protective walls in compliance with Item (1)(a) or installed within closed structures may be exempted.
5. Installation of storages, and etc.
(a) All the valves and piping components of storages shall have at least 1 meter of free space for safe operation, unless the storage is installed in a closed structure which has an access door or window for maintenance purposes.
(b) Compressor packages and storages shall be installed in structures which are insulated with noncombustible material, unless the protective wall is provided in compliance with above Item (1)(a) above.
(c) Compressor packages and storages shall be sufficiently ventilated (the total sum of the effective vent area of the vents shall be at least 300cm2 per 1m2 of the floor area). If sufficient vent area cannot be obtained, a mechanical ventilation system whose ventilating capacity is at least 0.5m2 per minute per 1m2 of floor area shall be provided.
6. Use of certified products; such as vessels
The storages installed and used for dispensers shall have passed inspection in compliance with Article 17 of the Act.
7. Corrosion-proof painting
Outer surfaces of storages shall be coated with corrosion-proof paint.
8. Materials for gas facilities
Compressor packages, storages, and dispensers shall be made of appropriate materials in accordance with the conditions of use.
9. Protective measures for compressor package, etc.
(a) Compressor packages and storages shall not hinder the movement of vehicles in and out of the station, and be protected from the impact of such vehicle operation, unless they are protected with the protective walls in compliance with Item (1)(a) above.
(b) The gas pipelines (exclusive of gas meters and main valves) in the stations shall be installed in the manner that they are not affected by the vehicles coming in and going out of the stations, in compliance with the Notice of MOCIE. In such case, the pipeline between the main valve and compressor package may be installed in a pit.
(c) Dispensers shall be protected from vehicles by reinforced concrete structures whose height is at least 30cm and thickness is at least 12cm, or a structure having equivalent or better strength.
(d) Dispensers shall be protected from the unexpected movement of vehicles.
10. Foundation of gas facilities
Storages and their auxiliary parts shall be installed on rigid reinforced concrete foundation in compliance with the Notice of MOCIE.
11. Compressor packages
(a) Compressor packages shall be equipped with buffer tanks or equivalent thereof to prevent pressure surge at the suction from being transmitted to the gas pipeline. In this case, the capacities of the accumulators shall be sufficient so that the pressure of the gas returning from the nozzle, etc., does not reach the opening pressures of the safety relief devices of the tanks.
(b) The inlet of the compressor package shall be equipped with a device that prevents air suction.
(c) Compressor packages shall be equipped with the devices which automatically stop pressure regulators and compressors when the pressure at inlets or outlets reaches preset value.
(d) Compressor packages shall be equipped with the devices which automatically stop the compressor package when the discharge temperature of the compressor package reaches preset value.
(e) Compressor packages shall be equipped with check valves in their inlet lines.
(f) Compressor packages shall be equipped with oil separators and filters in their outlet lines. However, the oil separator may be exempted when it is not necessary like lubricant-free compressors.
