A. All circulating heaters must be equipped with automatic one hundred percent shutoff safety pilots which will provide: (1) a constantly burning pilot for igniting the main burner whenever gas is admitted; and (2) to prevent the main gas valve from opening in case the pilot flame is extinguished.
B. All space heaters and circulators, regardless of input, will require a gas pressure regulator properly vented. All circulator heaters must be properly vented.
C. The following standards shall apply to the design, construction, location and operation of liquefied petroleum (LP) gas installations.
1. Containers and first stage regulating equipment shall be located outside of buildings other than buildings especially provided for this purpose, except an ICC container having a maximum water capacity of twelve pounds temporarily used for demonstrations purpose.
2. Each individual container shall be located, with respect, to the nearest important building or group of buildings or line of adjoining property which may be built on in accordance with the following table:
Water capacity: | Minimum distances above ground: | Underground: | Distance between above ground: |
125 to 500 gal. | 10 ft. | 10 ft. | 3 ft. |
501 to 1200 gal | 25 ft. | 25 ft. | 3 ft. |
Over 1200 to 2000 gal. | 50 ft. | 50 ft. | 5 ft. |
Less than 125 | None | 10 ft. | None |
3. No container, while installed for use, shall be stacked one above the other.
4. All aboveground tanks shall be mounted on permanent concrete bases.
5. All shutoff valves and accessory equipment (liquid or gas) shall be suitable for liquefied petroleum gas service, and designed for not less than the maximum pressure to which they may be subjected. Valves and accessories which may be subjected to container pressure shall have a rated working pressure of at least two hundred fifty pounds per square inch gauge.
6. All connectors, except safety relief connections, liquid level gauging devices and plugged openings, shall have shutoff valves located as close to the container as practicable.
7. Piping shall be wrought iron or steel (black or galvanized), brass or copper pipe; or seamless copper, brass or steel. All piping or tubing shall be suitable for a working pressure of not less than two hundred fifteen pounds per square inch. Copper tubing may be of the standard grade K or L, or equivalent, and shall have a minimum wall thickness of 0.032 inches.
8. Pipe joints may be screwed, flanged, welded, soldered, or brazed with a material having a melting point exceeding one thousand degrees Fahrenheit. For operating pressure of one hundred twenty-five pounds per square inch gauge or less, fittings shall be designed for a pressure of at least one hundred twenty-five pounds per square inch gauge. For operating pressure above this, fittings shall be designed for a minimum of two hundred fifty pounds per square inch gauge. Cast iron fittings shall be prohibited. Joints on seamless copper, brass, steel, or nonferrous gas tubing, shall be made by means of approved gas tubing fittings or soldered or brazed with material having a melting point of exceeding one thousand degrees Fahrenheit.
9. All materials such as valve seats, packing gaskets, diaphragms, etc., shall be of such quality as to be resistant to the action of liquefied petroleum gas under the service conditions to which they are subjected.
10. All underground lines shall be protected by backfilling with clean sand not less than four inches on all sides.
11. Test shall not be made with a flame.
12. Any appliance that was originally manufactured for operation with a gaseous fuel other than LP gas and is in good condition, may be used with LP gas only after it is properly converted, adapted and tested for performance with LP gas before the appliance is placed in use.
13. All bulk gas containers must be empty of fuel before moving, unless properly capped.
14. All cylinders shall be set upon a firm foundation or otherwise firmly secured. The possible effect on the outlet piping of settling shall be guarded against by a flexible connection or special fitting.
15. Regulators and low pressure relief devices shall be rigidly attached to the cylinder valves, cylinders, supporting standards, the building walls or otherwise rigidly secured, and shall be so installed that the elements will not effect their operation.
16. Valves and connections to the containers shall be protected while in transit storage, and while being moved into final utilization by a ventilated cap fastened to container.
(Prior code § 14.3010)).