UFC 3-600-01
17 April 2003
with change 16 January 2004
6-25
GAS SERVICE. Install gas service mains in accordance with
NFPA 54, National Fuel Gas Code, and NFPA 58, Liquefied Petroleum Gas
Code. Gas service mains are not permitted within the perimeter of foundation
lines. Provide natural draft cross ventilation for building crawl spaces containing
gas service piping. Raise supply connections from the gas service mains above
grade outside the foundation wall and pass through a full swing joint or loop of
metallic tubing before entering the building. This will avoid pipe rupture in the
event of differential settlement or earthquake. Locate pressure regulators
outside of buildings or vent to the outside. Standards for heating system
components common to all fuel systems are provided in NFPA 211, Chimneys,
Fireplaces, Vents, and Solid Fuel-Burning Appliances. Related information is
also available in the IBC. Use heating system devices listed by an NRTL.
6-26
COAL.
6-26.1
Storage. Locate coal storage to comply with the following
restrictions:
6-26.1.1
Do not locate coal storage in an area where contact with an
external heat source is possible. Avoid locating storage near piping, flues, boiler
walls, and over steam mains, even if buried. Coal must not be stored over or
under fire service mains. Maintain a separation distance of at least 6.1 m (20 ft)
from any fire service main.
6-26.1.2
Do not pile coal over manhole covers or covered pipe trenches that
might allow air to find its way into the pile. Do not arrange piles of coal around or
in contact with timbers, columns, or large pipes, as air may pass along these
surfaces and produce a flue effect. Do not vent coal piles with pipes or flues.
6-26.1.3
Do not pile low-grade coal higher than 3 m (10 ft) and best grade
coal not higher than 4.6 m (15 ft), unless they are piled by roll-packing method.
Locate yard piles at least 15.3 m (50 ft) from other combustibles and important
structures.
6-26.1.4
Construct coal bins, silos, or bunkers entirely of noncombustible
material, preferably concrete. The structure should be roofed over to keep out
rain and snow, and the space above the coal sufficiently ventilated to prevent the
accumulation of gases given off by the coal. An elevated cone-shaped bin in
which the coal is fed at the top and removed at the bottom is recommended.
This arrangement prevents fine materials from collecting and remaining in the bin
for long periods. The coal at the bottom, which is most likely to be troublesome,
is the first to be removed. Coal bins, and when possible, bunkers and silos,
should be emptied during the summer shutdowns and other prolonged idle
periods. Provide automatic sprinkler protection if the existing storage facility has
combustible construction or occupancy other than coal. Provide access
openings for manual fire fighting operations.
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