SECTION 033000 - CAST-IN-PLACE CONCRETE

Sludge Treatment Project Engineered Container Retrieval and Transfer System January 2012
a. Split or full round FRP sleeve must be slid over end of unit before connection of
carrier pipe. Connect carrier pipe and hydrostatically test as specified.
b. Center FRP sleeves over joint area and hold in position with fiberglass tape, mix
polyurethane foam components and pour into cavity according to instructions
provided by manufacturer.
c. Trim cured polyurethane foam flush with jacket sleeve. Center heat-actuated
shrink blanket over jacket sleeve and jacket of adjoining units to provide double
layer protection. Using a soft orange flame from a propane torch, work flame from
center toward one end, moving rapidly back and forth and around shrink blanket.
Air pockets must be removed and worked out from under shrink blanket. At field
joints with expansion provisions, wrap pipe with flexible polyurethane foam
insulation and hold in place with tape and complete joint in same manner per prior
instructions.
7. Backfill: A 4-in. layer of sand or fine gravel shall be placed and tamped in the trench to
provide a uniform bedding for the pipe. The entire trench shall be evenly backfilled with
a similar material as the bedding in 6-in. compacted layers to a minimum height of 6-in.
above the top of the insulated piping system. The remaining trench shall be evenly and
continuously backfilled in uniform layers with suitable excavated soil.
D. Air-Vent Piping:
1. Inlet: Same as service where installed with metal-to-plastic transition fittings for plastic
piping systems according to the piping manufacturer's written instructions.
2. Outlet: Type K, annealed-temper copper tubing with soldered or flared joints.
E. Condensate (coil drain) piping, aboveground, NPS 1-1/2 and smaller, shall be the following:
1. Type L, drawn-temper copper tubing, wrought-copper fittings, and brazed or pressureseal
joints.
F. Safety-Valve-Inlet and -Outlet Piping for Hot-Water Piping: Same materials and joining
methods as for piping specified for the service in which safety valve is installed with metal-toplastic
transition fittings for plastic piping systems according to the piping manufacturer's
written instructions.
3.2 VALVE APPLICATIONS
A. Install shutoff-duty valves at each branch connection to supply mains, and at supply connection
to each piece of equipment.
B. Install calibrated-orifice, balancing valves in the return pipe of each heating or cooling terminal.
C. Install triple-duty valves at each pump discharge as required to control flow direction.
D. Install safety valves at hot-water generators and elsewhere as required by ASME Boiler and
Pressure Vessel Code. Install drip-pan elbow on safety-valve outlet and pipe without valves to
the outdoors; and pipe drain to nearest floor drain or as indicated on Drawings. Comply with
Contract 44577 KW Annex – Rev. E 44577-CSI-SPEC-001 232113 - 9