3.2
EARTHWORK
Excavation and backfilling for tanks and piping shall be as specified in
Section 02300 EARTHWORK, except backfill for fiberglass reinforced fuel
tanks shall conform to the manufacturer's installation instructions.
3.3
STORAGE TANK INSTALLATION
Storage tank installation shall be in accordance with Section 13202 FUEL
STORAGE SYSTEMS.
3.4
PIPING INSTALLATION
Pipe shall be cut accurately to measurements established at the jobsite,
shall be installed without cold springing, and shall properly clear
windows, doors, and other openings. Cutting or other weakening of the
building structure to facilitate piping installation will not be permitted.
Piping shall be free of burrs, oil, grease, and other foreign matter.
Piping shall be installed to permit free expansion and contraction without
damaging building structure, pipe, joints, or hangers. Changes in
direction shall be made with fittings, except that bending of pipe 100 mm 4
inches and smaller will be permitted provided a pipe bender is used and
wide sweep bends are formed. The centerline radius of bends shall not be
less than 6 diameters of the pipe. Bent pipe showing kinks, wrinkles,
flattening, or other malformations will not be accepted. Carbon steel
piping to be bent shall conform to ASTM A 53/A 53M, Grade A, standard, or
Grade B extra-heavy weight. Vent pipes shall be carried through the roof
and shall be properly flashed. Unless otherwise indicated, horizontal
supply mains shall pitch down in the direction of flow with a grade of not
less than 25 mm in 12 m 1 inch in 40 feet. Open ends of pipelines and
equipment shall be properly capped or plugged during installation to keep
dirt or other foreign materials out of the systems. Pipe not otherwise
specified shall be uncoated. Unless otherwise specified or shown,
connections to equipment shall be made with malleable-iron unions for steel
pipe 65 mm 2-1/2 inches or less in diameter and with flanges for pipe 80 mm
3 inches or more in diameter. Unions for copper pipe or tubing shall be
brass or bronze. Connections between ferrous piping and copper piping
shall be electrically isolated from each other with dielectric couplings or
other approved methods. Reducing fittings shall be used for changes in
pipe sizes. In horizontal HTW lines, reducing fittings shall be eccentric
type to maintain the top of the lines at the same level.
3.4.1
Pipe Sleeves
Pipe passing through concrete or masonry walls or concrete floors or roofs
shall be provided with pipe sleeves fitted into place at the time of
construction. A waterproofing clamping flange shall be installed as
indicated. Sleeves shall not be installed in structural members except
where indicated or approved. Rectangular and square openings shall be as
detailed. Each sleeve shall extend through its specified wall, floor, or
roof, and shall be cut flush with each surface, except that sleeves through
floors and roofs shall extend above the top surface at least 150 mm 6 inches
for proper flashing or finishing. Membrane clamping rings shall be
provided where membranes are penetrated. Unless otherwise indicated,
sleeves shall be sized to provide a minimum clearance of 6 mm 1/4 inch
between bare pipe and sleeves or between jacket over insulation and
sleeves. Sleeves in bearing walls, waterproofing membrane floors, and wet
areas shall be galvanized steel pipe. Sleeves in nonbearing walls, floors,
or ceilings may be galvanized steel pipe or galvanized sheet metal with
SECTION 15555A
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