Motor fuel-dispensing facilities for CNG fuel shall be in accordance with this section and the Florida Fire Prevention Code. The operation of CNG motor fuel-dispensing facilities shall be regulated by the Florida Fire Prevention Code.
Storage vessels and equipment
used for the storage, compression or dispensing of CNG shall be approved
in accordance with Sections 413.2.1
Containers; compressors; pressure-relief devices, including pressure-relief valves; and pressure regulators and piping used for CNG shall be approved.
Hoses, hose connections, dispensers, gas detection systems and electrical equipment used for CNG shall be listed. Vehicle fueling connections shall be listed and labeled.
Residential fueling appliances shall be listed. The capacity of a residential fueling appliance shall not exceed 5 standard cubic feet per minute (0.14 standard cubic meter/min) of natural gas.
Compression, storage and dispensing equipment shall be located above ground outside.
- Compression, storage or dispensing equipment is allowed in buildings of noncombustible construction, as set forth in the Florida Building Code, Building, which are unenclosed for three-quarters or more of the perimeter.
- Compression, storage and dispensing equipment is allowed to be located indoors or in vaults in accordance with the Florida Fire Prevention Code.
- Residential fueling appliances and equipment shall be allowed to be installed indoors in accordance with the equipment manufacturer's instructions and Section 413.4.3.
In addition to the fuel-dispensing requirements of the Florida Fire Prevention Code, compression, storage and dispensing equipment not located in vaults complying with the Florida Fire Prevention Code and other than residential fueling appliances shall not be installed:
- Beneath power lines.
- Less than 10 feet (3048 mm) from the nearest building or property that could be built on, public street, sidewalk or source of ignition.
Exception: Dispensing equipment need not be separated from canopies that provide weather protection for the dispensing equipment and are constructed in accordance with the Florida Building Code, Building.
3. Less than 25 feet (7620 mm) from the nearest rail of any railroad track.
4. Less than 50 feet (15 240 mm) from the nearest rail of any railroad main track or any railroad or transit line where power for train propulsion is provided by an outside electrical source, such as third rail or overhead catenary.
5. Less than 50 feet (15 240 mm) from the vertical plane below the nearest overhead wire of a trolley bus line.
Residential fueling appliance
s shall be installed in accordance with Sections 413.4.1
Residential fueling appliances shall be connected to the premises' gas piping system without causing damage to the piping system or the connection to the internal appliance apparatus.
Residential fueling appliances located outdoors shall be installed on a firm, noncombustible base.
Where located indoors, residential fueling appliances shall be vented to the outdoors. A gas detector set to operate at one-fifth of the lower limit of flammability of natural gas shall be installed in the room or space containing the appliance. The detector shall be located within 6 inches (152 mm) of the highest point in the room or space. The detector shall stop the operation of the appliance and activate an audible or a visual alarm.
Self-service CNG-dispensing systems, including key, code and card lock dispensing systems, shall be limited to the filling of permanently mounted fuel containers on CNG-powered vehicles.
In addition to the requirements in the Florida Fire Prevention Code, the owner of a self-service CNG-dispensing facility shall ensure the safe operation of the system and the training of users.
Pressure regulators shall be designed, installed or protected so their operation will not be affected by the elements (freezing rain, sleet, snow, ice, mud or debris). This protection is allowed to be integral with the regulator.
Piping to equipment shall be provided with a remote manual shutoff valve. Such valve shall be provided with ready access.
An emergency shutdown device shall be located within 75 feet (22 860 mm) of, but not less than 25 feet (7620 mm) from, dispensers and shall also be provided in the compressor area. Upon activation, the emergency shutdown system shall automatically shut off the power supply to the compressor and close valves between the main gas supply and the compressor and between the storage containers and dispensers.
The discharge of CNG from motor vehicle fuel cylinders for the purposes of maintenance, cylinder certification, calibration of dispensers or other activities shall be in accordance with this section. The discharge of CNG from motor vehicle fuel cylinders shall be accomplished through a closed transfer system or an approved
method of atmospheric venting in accordance with Section 413.9.1
A documented procedure which explains the logical sequence for discharging the cylinder shall be provided to the code official for review and approval. The procedure shall include what actions the operator will take in the event of a low-pressure or high-pressure natural gas release during the discharging activity. A drawing illustrating the arrangement of piping, regulators and equipment settings shall be provided to the code official for review and approval. The drawing shall illustrate the piping and regulator arrangement and shall be shown in spatial relation to the location of the compressor, storage vessels and emergency shutdown devices.
Atmospheric venting of motor vehicle fuel cylinders shall be in accordance with Sections 422.214.171.124
A drawing illustrating the location of the vessel support, piping, the method of grounding and bonding, and other requirements specified herein shall be provided to the code official for review and approval.
A method of rigidly supporting the vessel during the venting of CNG shall be provided. The selected method shall provide not less than two points of support and shall prevent the horizontal and lateral movement of the vessel. The system shall be designed to prevent the movement of the vessel based on the highest gas-release velocity through valve orifices at the vessel's rated pressure and volume. The structure or appurtenance shall be constructed of noncombustible materials.
The structure or appurtenance used for stabilizing the cylinder shall be separated from the site equipment, features and exposures and shall be located in accordance with Table 4126.96.36.199.
[F] TABLE 4188.8.131.52
SEPARATION DISTANCE FOR ATMOSPHERIC VENTING OF CNG
| EQUIPMENT OR FEATURE ||MINIMUM |
|Building openings ||25|
|Lot lines ||15|
|Public ways ||15|
|CNG compressor and storage vessels ||25|
|CNG dispensers ||25|
For SI: 1 foot = 304.8 mm.
The structure or appurtenance used for supporting the cylinder shall be grounded in accordance with NFPA 70. The cylinder valve shall be bonded prior to the commencement of venting operations.
A vent tube that will divert the gas flow to the atmosphere shall be installed on the cylinder prior to the commencement of the venting and purging operation. The vent tube shall be constructed of pipe or tubing materials approved for use with CNG in accordance with the Florida Fire Prevention Code.
The vent tube shall be capable of dispersing the gas a minimum of 10 feet (3048 mm) above grade level. The vent tube shall not be provided with a rain cap or other feature which would limit or obstruct the gas flow.
At the connection fitting of the vent tube and the CNG cylinder, a listed bidirectional detonation flame arrester shall be provided.
Approved NO SMOKING signs shall be posted within 10 feet (3048 mm) of the cylinder support structure or appurtenance. Approved CYLINDER SHALL BE BONDED signs shall be posted on the cylinder support structure or appurtenance.