Project Name
Project Number
UEPH Complex
Statement of Work
26 November 2001
condensation, or vapor transmission will not wet the insulation.
4-15.8
Installation. The piping system furnished shall be installed in accordance with the
piping system manufacturer's instructions. The Contractor shall obtain the services of a trained
representative of the pipe system manufacturer to instruct the Contractor's work forces in the
installation procedures to ensure that the system is installed in accordance with the
manufacturer's published instructions and the plans and specifications. The manufacturer's
representative shall be a person who regularly performs such duties for the manufacturer.
4-15.9
Testing. The carrier piping shall be hydrostatically tested at 1 times the working
pressure for the system. The casing shall be tested in accordance with the manufacturer's
recommendations.
4-16
STEAM [AND CONDENSATE RETURN] [HIGH TEMPERATURE HOT WATER]
DISTRIBUTION. [Insert "DELETED" if not applicable and delete remainder of text in all
paragraphs.] Distribution system shall be installed to supply steam to [and return condensate
from] mechanical equipment rooms. A complete underground [heat distribution] [and]
[condensate return] system including all required components such as carrier pipes, [steam
pipe,] [high temperature hot water supply pipe,] [condensate return pipe,] [high temperature hot
water return pipe,] and fittings, anchors, pipe supports, insulation, protective casing, and
cathodic protection, for the system supplied. Gland type end seals will not be permitted.
Drainable-Dryable-Testable (DDT) systems with fiberglass casings shall not be permitted.
4-16.1
Piping materials.
4-16.1.1 Steam and High Temperature Hot Water Pipe. Pipe material shall be steel; seamless
ASTM A 53, Grade B or ASTM A 106, Grade B; or electric resistance welded ASTM A 53,
Grade B; Schedule 40. Standard weight will be permitted for pipe sizes 300 mm 12 inches and
above. ASTM A 53, Type F furnace butt welded pipe will not be allowed. Joints will not be
allowed in the factory fabricated straight section of the carrier pipe. Factory fabricated piping
sections, as part of an expansion loop or bend, shall have all welded joints 100%
radiographically inspected in accordance with ASME B31.1.
4-16.1.2 Condensate pipe. Pipe shall be steel; seamless ASTM A 53, Grade B or ASTM A
106, Grade B, schedule 80; electric resistance welded ASTM A 53, Grade B; Schedule 80.
ASTM A 53, Type F furnace butt welded pipe will not be allowed. Joints will not be allowed in
the factory fabricated section of the carrier pipe. Factory fabricated piping sections, as part of
an expansion loop or bend shall have all welded joints 100% radiographically inspected in
accordance with ASME B31.1.
4-16.2
Factory fabricated, direct-buried DDT systems.
4-16.2.1 Casing. Casing shall be smooth-wall steel, electric resistance spiral welded,
conforming to ASTM A 134, ASTM A 135, or ASTM A 139. Minimum casing thickness shall be
6.35 mm (0.25 inches). Eccentric connectors shall be provided between casing sections as
needed to provide drainage of casing section between manholes and between manholes and
buildings.
4-16.2.2 Casing End Plates, Vents, and Drains. End plates shall be made of ASTM A 36/A
36M steel, minimum thickness 13 mm (1/2 inch) for conduit pipe sizes above 300 mm (12
inches) and 9.5 mm (0.375 inches) for conduit pipe sizes 300 mm (12 inches) and less. A 25
mm (1 inch) ASTM A 53, Sch 40, galvanized vent riser pipe shall be provided on end plate vent
opening. Vent pipe shall extend to top of manhole and terminate 300 mm (12 inches) above
grade with a 180 degree bend. A 25 mm (1 inch) drain shall be provided at the bottom and vent
at the top. Brass plugs and half coupling, constructed with welded steel and welded to the end
plate, shall be furnished; drains shall be plugged; vents shall not be plugged.
SOW-97
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