Code of Maine Rules › 02 - DEPARTMENT OF PROFESSIONAL AND FINANCIAL REGULATION › 658 - MAINE FUEL BOARD › Chapter 8 - INSTALLATION OF OIL BURNING EQUIPMENT › Section 658-8-11 - Inside Oil Supply Tanks

Current through 2024-29, July 17, 2024
8.11.1
Leg
				Brackets
The leg brackets welded on the tank are not considered a leg
				  and may not be used to rest on the side of the reinforced concrete pad or solid
				  concrete blocks.
8.11.2
Installation on Wood Not Permitted
Oil supply tanks shall not be installed on wood or other
				  combustible surfaces.
8.11.3
Support of Inside Oil Supply
				Tanks on Finished Floors
The tank legs of an installation of an unenclosed supply
				  tank(s) located inside a building(s) with a finished cement floor shall not
				  exceed twelve (12) inches in height with floor flanges at the base of the steel
				  legs. The use of shims is prohibited.
8.11.4
Support of Inside Oil Supply
				Tanks on Unfinished Floors
The installation of an unenclosed supply tank(s) located
				  inside a building(s) without a finished cement floor must be supported by four
				  4 inch x 8 inch x 16 inch solid concrete blocks or a reinforced concrete pad.
				  The pad must be at least three (3) inches thick, the width and length extending
				  the full dimensions of the tank. The tank legs shall not exceed twelve (12)
				  inches in height with floor flanges at the base of the steel legs. There must
				  be a minimum of four (4) inches of clearance under the tank from any surface.
				  The use of shims is prohibited.
8.11.5
Multiple Tank Installation: Tops
				to be on Same Horizontal Plane
The top of all of the fuel oil tanks on a multiple tank
				  installation must be on the same horizontal plane.
8.11.6
Location of Oil Shut-Off
				Valves
Oil shut-off valves must be provided immediately adjacent to
				  the burner supply connections at the bottom of the supply tanks.
8.11.7
Manifold
				Requirements
The manifold at the cross connections of the burner supply
				  line must be of steel, wrought-iron pipe or copper tubing. The manifold piping
				  must be as close to the shut-off valves as possible so that the distance
				  between the tank and the last fitting does not extend beyond six (6) inches
				  from the face of the tanks and the final fitting (elbow or tee). See Figure
				  8-3.
8.11.8
Prevention of Oil Spills From Multiple Tank Installations
On multiple tank installations, it is the installer's
				  responsibility to ensure that return line product will not cause
				  spillage.
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8.11.9
Multiple Tank Installations:
				Common Venting System
When installing multiple fuel oil tanks with separate fill
				  pipes and a common venting system, the requirement for increasing the vent pipe
				  one pipe size larger than the largest individual vent pipe is not
				  applicable.
8.11.10
Cross-Connection of Two Oil Supply Tanks
When installing two tanks that are cross connected according
				  to Figure 8.9.1 of NFPA 31, the gauge must be installed only in the vented tank
				  and all burner supply piping from the tank outlet to the filter installed at
				  the tank must be black iron pipe. The piping connected from the second tank may
				  be either black iron pipe or copper tubing. If the filter is not located at the
				  tank manifold, then copper tubing may be used to connect the black iron pipe
				  manifold to the inlet of the filter.
8.11.11
Removal of Piping Required Upon
				Removing Tank From Service
When removing, replacing, or taking a tank out of service for
				  any period of time, the oil tank fill and vent piping must be removed from the
				  side of the building.