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50.7.2 Mobile Cooking
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Mobile cooking operations and equipment shall comply with 50.7.1, 50.7.2, and NFPA 96.
The certification shall be good for one year.
Recertification shall occur every time an appliance is replaced or added and if a piping connection is modified in anyway.
Section 18.104.22.168 shall not apply to the following:
- Systems installed on mobile homes
- Systems installed on recreational vehicles
- Cargo tank vehicles, including trailers and semitrailers, and similar units used to transport LP-Gas as cargo, which are covered by Chapter 9 of NFPA 58.
- LP-Gas engine fuel systems on the vehicles, which are covered by Chapter 11 of NFPA 58.
ASME mobile containers shall be in accordance with one of the following:
- A MAWP of 312 psig (2.2 MPag) or higher where installed in enclosed spaces of vehicles
- A MAWP of 312 psig (2.2 MPag) or higher where installed on passenger vehicles
- A MAWP of 250 psig (1.7 MPag) or higher for containers where installed on the exterior of nonpassenger vehicles
The capacity of individual LP-Gas containers on highway nonpassenger vehicles shall 1000 gal (3.8 m3) or in accordance with U.S. Department of Transportation regulations.
The LP-Gas supply system, including the containers, shall be installed either on the outside of the vehicle or in a recess or cabinet vaportight to the inside of the vehicle but accessible from and vented to the outside, with the vents located near the top and bottom of the enclosure and 3 ft (1 m) horizontally away from any opening into the vehicle below the level of the vents. [58:22.214.171.124]
Containers shall be mounted securely on the vehicle or within the enclosing recess or cabinet. [58:126.96.36.199]
Containers shall be installed with road clearance in accordance with 11.8.3 of NFPA 58. [58:188.8.131.52(A)]
Fuel containers shall be mounted to prevent jarring loose and slipping or rotating, and the fastenings shall be designed and constructed to withstand, without permanent visible deformation, static loading in any direction equal to four times the weight of the container filled with fuel. [58:184.108.40.206(B)]
Where containers are mounted within a vehicle housing, the securing of the housing to the vehicle shall comply with this provision. Any removable portions of the housing or cabinet shall be secured while in transit. [58:220.127.116.11(C)]
Where cylinders are located on the outside of a vehicle, weather protection shall be provided. [58:18.104.22.168(H)]
Container appurtenances shall be installed in accordance with the following:
- Pressure relief valve installation on ASME containers installed in the interior of vehicles complying with Section 11.9 of NFPA 58 shall comply with 11.8.5 of NFPA 58.
- Pressure relief valve installations on ASME containers installed on the outside of vehicles shall comply with 11.8.5 of NFPA 58 and 22.214.171.124.3.3.
- Main shutoff valves on containers for liquid and vapor shall be readily accessible.
- Cylinders shall be designed to be filled in either the vertical or horizontal position, or if they are the universal type, they are permitted to be filled in either position.
- All container inlets, outlets, or valves installed in container inlets or outlets, except pressure relief devices and gauging devices, shall be labeled to designate whether they communicate with the vapor or liquid space.
- Containers from which only vapor is to be withdrawn shall be installed and equipped with connections to minimize the possibility of the accidental withdrawal of liquid.
Regulators shall be installed in accordance with 6.10.2 of NFPA 58 and 126.96.36.199.4.2.1 through 188.8.131.52.4.2.5. [58:184.108.40.206]
Regulators shall be installed with the pressure relief vent opening pointing vertically downward to allow for drainage of moisture collected on the diaphragm of the regulator. [58:220.127.116.11(A)]
Regulators not installed in compartments shall be equipped with a durable cover designed to protect the regulator vent opening from sleet, snow, freezing rain, ice, mud, and wheel spray. [58:18.104.22.168(B)]
If vehicle-mounted regulators are installed at or below the floor level, they shall be installed in a compartment that provides protection against the weather and wheel spray. [58:22.214.171.124(C)]
Regulator compartments shall comply with the following:
- The compartment shall be of sufficient size to allow tool operation for connection to and replacement of the regulator(s).
- The compartment shall be vaportight to the interior of the vehicle.
- The compartment shall have a 1 in.2 (650 mm2) minimum vent opening to the exterior located within 1 in. (25 mm) of the bottom of the compartment.
- The compartment shall not contain flame or spark-producing equipment.
A regulator vent outlet shall be at least 2 in. (51 mm) above the compartment vent opening. [58:126.96.36.199(E)]
Piping shall be installed in accordance with 6.11.3 of NFPA 58 and 188.8.131.52.5.1.1 through 184.108.40.206.5.1.13. [58:220.127.116.11]
Steel tubing shall have a minimum wall thickness of 0.049 in. (1.2 mm). [58:18.104.22.168(A)]
A flexible connector shall be installed between the regulator outlet and the fixed piping system to protect against expansion, contraction, jarring, and vibration strains. [58:22.214.171.124(B)]
Flexible connectors shall be installed in accordance with 6.11.6 of NFPA 58. [58:126.96.36.199(D)]
Flexible connectors longer than the length allowed in NFPA 58, or fuel lines that incorporate hose, shall be used only where approved. [58:188.8.131.52(E)]
The fixed piping system shall be designed, installed, supported, and secured to minimize the possibility of damage due to vibration, strains, or wear and to preclude any loosening while in transit. [58:184.108.40.206(F)]
Piping shall be installed in a protected location. [58:220.127.116.11(F)]
Where piping is installed outside the vehicle, it shall be installed as follows:
- Piping shall be under the vehicle and below any insulation or false bottom.
- Fastening or other protection shall be installed to prevent damage due to vibration or abrasion.
- At each point where piping passes through sheet metal or a structural member, a rubber grommet or equivalent protection shall be installed to prevent chafing.
Gas piping shall be installed to enter the vehicle through the floor directly beneath or adjacent to the appliance served. [58:18.104.22.168(I)]
If a branch line is installed, the tee connection shall be located in the main gas line under the floor and outside the vehicle. [58:22.214.171.124(J)]
Piping systems, including hose, shall be pressure tested and proven free of leaks in accordance with Section 6.16 of NFPA 58. [58:126.96.36.199(M)]
There shall be no fuel connection between a tractor and trailer or other vehicle units. [58:188.8.131.52]
Equipment shall be installed in accordance with Section 6.20 of NFPA 58, 184.108.40.206.6.1, and 220.127.116.11.6.2. [58:6.26.6]
Installation shall be made in accordance with the manufacturer's recommendations and, in the case of approved equipment, as provided in the approval. [58:18.104.22.168]
Subsection 22.214.171.124.7 shall apply to the installation of all appliances on vehicles. It shall not apply to engines. [58:126.96.36.199]
Where the device or appliance, such as a cargo heater or cooler, is designed to be in operation while the vehicle is in transit, means, such as an excess-flow valve, to stop the flow of gas in the event of a line break shall be installed. [58:188.8.131.52]
Appliances installed in the cargo space of a vehicle shall be readily accessible whether the vehicle is loaded or empty. [58:184.108.40.206]
Appliances shall be constructed or otherwise protected to minimize possible damage or impaired operation due to cargo shifting or handling. [58:220.127.116.11]
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