Section 406. Transfer of diesel fuel.
(a) General rule.--Diesel fuel shall be transferred as provided in this section.
(b) Pump transfers.--When diesel fuel is transferred by means of a pump and a hose equipped with a nozzle containing a self-closing valve, a powered pump may be used only if:
(1) the hose is equipped with a nozzle containing a self-closing valve without a latch-open device; and
(2) the pump is equipped with an accessible emergency shutoff switch.
(c) Compressed gas prohibition.--Diesel fuel shall not be transferred using compressed gas.
(d) Status of diesel engine.--Diesel fuel shall not be transferred to the fuel tank of diesel-powered equipment while the equipment's engine is running.
(e) Dry-system design.--Diesel fuel piping systems shall be designed and operated as dry systems.
(f) Standards for pipes, valves and fittings.--All piping, valves and fittings shall meet the following requirements:
(1) Be capable of withstanding working pressures and stresses.
(2) Be capable of withstanding four times the static pressures.
(3) Be compatible with diesel fuel.
(4) Be maintained in a manner that prevents leakage.
(g) Manual shutoff valves.--Vertical pipelines shall have manual shutoff valves installed at the surface filling point and at the underground discharge point.
(h) Exposed fuel pipelines.--Unburied diesel fuel pipelines shall not exceed 300 feet in length and shall have shutoff valves located at each end of the unburied pipeline.
(i) Horizontal pipeline prohibition.--Horizontal pipelines shall not be used to distribute fuel throughout a mine.
(j) Limitation on piping systems.--Diesel fuel piping systems shall be used only to transport fuel from the surface directly to a single underground diesel fuel transfer point.
(k) Restrictions related to boreholes.--When boreholes are used, the diesel fuel piping system shall not be located in a borehole with electric power cables.
(l) Inspections.--Diesel fuel pipelines located in any shaft shall be included as part of the required examination of the shaft.
(m) Location in entries.--Diesel fuel piping systems located in entries shall not be located on the same side of the entry as electric cables or power lines.
(n) Trolley-haulage limitations.--Diesel fuel pipelines shall not be located in any trolley-haulage entry, except that they may cross the entry perpendicular if buried or otherwise protected from damage and sealed.
(o) Protection.--Diesel fuel piping systems shall be protected to prevent physical damage.