3.4.5
Insulation Sealing for Chilled Water Systems
The ends of insulation shall be sealed with vapor barrier. Penetrations
shall be caulked. Caulking shall be applied to parting line between
equipment and removable section insulation. Upon completion of
installation of the insulation, including removable sections, two coats of
vapor barrier coating shall be applied with a layer of glass cloth embedded
between the coats. The total dry thickness of the finish shall be 1.6 mm
1/16 inch. The coating shall be applied so that the removable sections are
coated separate from the body of the equipment so these sections remain
removable. Coating shall be applied to flanges, unions, valves, anchors,
fittings and accessories, all terminations, and all insulation not
protected by factory vapor barrier jackets or PVC fitting covers. Tape
seams shall overlap 25 mm 1 inch. The coating shall extend out onto the
adjoining pipe insulation 50 mm 2 inches. Insulation terminations shall be
tapered to unions at a 45-degree angle.
3.4.6
Insulation Thickness
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NOTE: Delete inapplicable columns in Tables 1 and 2.
**************************************************************************
The minimum thickness of insulation for [the heat distribution system]
[and] [condensate return system] [each section of pipe] shall be in
accordance with Tables 1 and 2.
TABLE 1
Minimum Pipe Insulation Thickness (In millimeters)
For steam (110 to 2,800 kPa (gage)) and High Temperature
Hot Water Supply and Return (120 to 230 degrees C)
Nominal
MPT-PC
Delta
Thermo-12
Foamglass
Pipe
MPT-PF
Super
Diameter
Caltemp
(mm)
25
50
63
100
115
40
50
63
100
115
50
65
85
110
125
65
65
85
110
125
80
75
100
125
150
100
75
100
125
150
125
75
100
125
150
150
85
110
135
150
200
85
110
135
150
250
100
125
150
165
300
100
125
150
165
350
100
125
150
165
400
100
125
150
165
450
100
125
150
165
TABLE 1
Minimum Pipe Insulation Thickness (In inches)
For steam (16 to 408 psig) and High Temperature
Hot Water Supply and Return (250 to 450 degrees F)
SECTION 02560
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