substitution request - Alliance Construction Solutions

Space heating supply and return. 1 1 1.5 2 2.5
Steam and condensate lines. 2 3 3 4 4
Cooling tower/condenser water
supply to heat exchangers
(where below 60°F).
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
1 1 1 1 1
Cooling tower water piping
exposed to weather.
2 2 2 2 2
Cooling tower make-up water
piping exposed to weather.
2 2 2 2 2
Refrigerant suction and hot gas
lines.
1 1 1 1 1
Fire protection piping exposed to
weather.
2 2 2 2 2
Note: For any piping not noted above to be exposed to outdoor ambient
temperatures, increase insulation thickness by 0.5 inches where installed in such
exposed locations.
B. All portions of Exhaust Piping for emergency generators and fire pumps, including fittings
and silencers, shall be insulated as follows:
1. For temperatures up to 1200 deg. F, provide 4” thick calcium silicate insulation,
Specification “C”.
2. For temperatures above 1200 deg. F, provide 4” thick thermal ceramic insulation,
Specification “D”.
3.03 DUCTWORK SYSTEM INSULATION:
A. Ductwork on which insulation is not required:
1. Fibrous glass ductwork.
2. Lined ductwork.
3. Exhaust air ductwork, except as specifically noted on drawings.
B. Insulate each ductwork system specified in Table 2 with the type and thickness of insulation shown; omit
insulation where ductwork is specified to be lined.
Table 2
Ductwork Insulation Schedule
System Specification Vapor Seal Required
HVAC Supply – concealed C Yes
HVAC Return – concealed C No
23 0713 - 6 MECHANICAL INSULATION