Install Instructions
IM-PR 566442 1114 (Design Manual)
50
Density of Ethylene Glycol Solutions (lbs/ft³)
Temperature
(°F)
Ethylene Glycol Concentration by Volume
0% 10% 20% 30% 40% 50% 60% 70% 80% 90%
-30 68.12 69.03 69.90 70.75
-20 68.05 68.96 69.82 70.65 71.45
-10 67.04 67.98 68.87 69.72 70.54 71.33
0 66.97 67.90 68.78 69.62 70.43 71.20
10 65.93 66.89 67.80 68.67 69.50 70.30 71.06
20 64.83 65.85 66.80 67.70 68.56 69.38 70.16 70.92
30 63.69 64.75 65.76 66.70 67.59 68.44 69.25 70.02 70.96
40 62.42 63.61 64.66 65.66 66.59 67.47 68.31 69.10 69.86 70.59
50 62.42 63.52 64.56 65.55 66.47 67.34 68.17 68.95 69.70 70.42
60 62.38 63.42 64.45 65.43 66.34 67.20 68.02 68.79 69.53 70.23
70 62.31 63.31 64.33 65.30 66.20 67.05 67.86 68.62 69.35 70.04
80 62.23 63.19 64.21 65.17 66.05 66.90 67.69 68.44 69.15 69.83
90 62.11 63.07 64.07 65.02 65.90 66.73 67.51 68.25 68.95 69.62
100 62.00 62.93 63.93 64.86 65.73 66.55 67.32 68.05 68.74 69.40
110 61.84 62.79 63.77 64.70 65.56 66.37 67.13 67.84 68.52 69.17
120 61.73 62.63 63.61 64.52 65.37 66.17 66.92 67.63 68.29 68.92
130 61.54 62.47 63.43 64.34 65.18 65.97 66.71 67.40 68.05 68.67
140 61.39 62.30 63.25 64.15 64.98 65.75 66.48 67.16 67.81 68.41
150 61.20 62.11 63.06 63.95 64.76 65.53 66.25 66.92 67.55 68.14
160 61.01 61.92 62.86 63.73 64.54 65.30 66.00 66.66 67.28 67.86
170 60.79 61.72 62.64 63.51 64.31 65.05 65.75 66.40 67.01 67.58
180 60.57 61.51 62.42 63.28 64.07 64.80 65.49 66.12 66.72 67.28
190 60.35 61.29 62.19 63.04 63.82 64.54 65.21 65.84 66.42 66.97
200 60.13 61.06 61.95 62.79 63.56 64.27 64.93 65.55 66.12 66.65
210 59.88 60.82 61.71 62.53 63.29 63.99 64.64 65.24 65.81 66.33
220 60.57 61.45 62.27 63.01 63.70 64.34 64.93 65.48 65.99
230 60.31 61.18 61.99 62.72 63.40 64.03 64.61 65.15 65.65
240 60.05 60.90 61.70 62.43 63.10 63.71 63.28 64.81 65.29
250 59.77 60.62 61.40 62.12 62.78 63.39 63.94 64.46 64.93
Table 1-18 Density of ethylene glycol solutions at various concentrations and temperatures
11
1.11.2.2 Glycol primary piping sizing
Size primary piping for glycol systems similar to
how you would size piping for 100% water systems.
Maintain a fluid velocity of 2 to 4 feet per second at
a temperature drop that will satisfy the total design
heat load of the system. Maintaining glycol system
flow through the piping above 2 feet per second
will facilitate separation of air from the solution –
extending its useful life.
Not exceeding 4 feet per second will enable the
primary piping to operate quietly. Higher fluid flow
velocities can contribute to the erosion of copper
components within the system.
Table 1-19 can be used to size primary piping for
propylene glycol and Table 1-20 can be used to
size primary piping for ethylene glycol systems
based on the glycol percentage and flow rate
required for typical glycol systems (i.e., those
designed for a 30°F temperature drop).
11. ©ASHRAE Fundamentals, Chapter 31, 2009.