pressure and temperature chart of ammonia - i nh sub 3 sub i
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6/16/13 Pressure and Temperature Chart of Ammonia - <i>NH<sub>3</sub></i>
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Pressure and Temperature Chart of Ammonia - NH3
A temperature (oF) and pressure (psia, psig) chart for Saturated Ammonia - NH3
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Anhydrous ammonia NH3
a colorless non-flammable liquefied gasvapor lighter than air - 0.6 compared to air 1.0
ignition temperature 1204oF (vapor concentration between 15% and 28%)corrodes galvanized metals, cast iron, copper, brass or copper alloysweight of liquid ammonia 5.15 pounds per gallon (water weight 8.33 pounds per gallon)
boiling point liquid ammonia at atmospheric pressure -28oFliquid ammonia expands to 850 times its liquid volume at atmospheric pressure
Ammonia Temperature Pressure Diagram
Boiling pressures of liquid ammonia at different temperatures are indicated in the diagram and charts below:
Temperature Pressure
oF psiainches Mercury
(vacuum)
-60 5.6 18.6
-58 5.9 17.8
-57 6.1 17.4
-56 6.3 17.0
-55 6.5 16.6
-54 6.8 16.2
-53 7.0 15.7
-52 7.2 15.3
-51 7.4 14.8
-50 7.7 14.3
-49 7.9 13.8
-48 8.2 13.3
-47 8.4 12.8
-46 8.7 12.2
-45 9.0 11.7
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6/16/13 Pressure and Temperature Chart of Ammonia - <i>NH<sub>3</sub></i>
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-44 9.2 11.1
-43 9.5 10.6
-42 9.8 10.0
-41 10.1 9.3
-40 10.4 8.7
-39 10.7 8.1
-38 11.0 7.4
-37 11.4 6.8
-36 11.7 6.1
-35 12.1 5.4
-34 12.4 4.7
-33 12.8 3.9
-32 13.1 3.2
-31 13.5 2.4
-30 13.9 1.6
-29 14.3 0.8
psia psig
-28 14.7 0.0
-27 15.1 0.4
-26 15.6 0.8
-25 16.0 1.3
-24 16.4 1.7
-23 16.9 2.2
-22 17.3 2.6
-21 17.8 3.1
-20 18.3 3.6
-19 18.8 4.1
-18 19.3 4.6
-17 19.8 5.1
-16 20.3 5.6
-15 20.9 6.2
Temperature Pressure
oF psia psig
-14 21.4 6.7
-13 22.0 7.3
-12 22.6 7.9
-11 23.2 8.4
-10 23.7 9.0
-9 24.4 9.6
-8 25.0 10.3
-7 25.6 10.9
-6 26.3 11.6
-5 26.9 12.2
-4 27.6 12.9
-3 28.3 13.6
-2 29.0 14.3
-1 29.7 15.0
0 30.4 15.7
1 31.2 16.5
2 31.9 17.2
3 32.7 18.0
4 33.5 18.8
5 34.3 19.6
6 35.1 20.4
7 35.9 21.2
8 36.8 22.1
9 37.6 22.9
10 38.5 23.8
11 39.4 24.7
12 40.3 25.6
13 41.2 26.5
14 42.2 27.5
15 43.1 28.4
16 44.1 29.4
17 45.1 30.4
18 46.1 31.4
19 47.2 32.5
20 48.2 33.5
21 49.3 34.6
22 50.4 35.7
23 51.5 36.8
24 52.6 37.9
25 53.7 39.0
Pressure
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Pa (N/m2)
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psi
inches H2O
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Flow
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cfm
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6/16/13 Pressure and Temperature Chart of Ammonia - <i>NH<sub>3</sub></i>
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26 54.9 40.2
27 56.1 41.4
28 57.3 42.6
29 58.5 43.8
30 59.7 45.0
40 73.3 58.6
50 89.2 74.5
60 107.6 92.9
70 128.8 114.1
Temperature Pressure
oF psia psig
76 143.0 128.3
77 145.4 130.7
78 147.9 133.2
79 150.5 135.8
80 153.0 138.3
81 155.6 140.9
82 158.3 143.6
83 161.0 146.3
84 163.7 149.0
85 166.4 151.7
86 169.2 154.5
87 172.0 157.3
88 174.8 160.1
89 177.7 163.0
90 180.6 165.9
91 183.6 168.9
92 186.6 171.9
93 189.6 174.9
94 192.7 178.0
95 195.8 181.1
96 198.9 184.2
97 202.1 187.4
98 205.3 190.6
99 208.6 193.9
100 211.9 197.2
101 215.2 200.5
102 218.6 203.9
103 222.0 207.3
104 225.4 210.7
105 228.9 214.2
106 232.5 217.8
107 236.0 221.3
108 239.7 225.0
109 243.3 228.6
110 247.0 232.3
111 250.8 236.1
112 254.5 239.8
113 258.4 243.7
114 262.2 247.5
115 266.2 251.5
116 270.1 255.4
117 274.1 259.4
118 278.2 263.5
119 282.3 267.6
120 286.4 271.7
Note!
Between -60oF to -28oF the pressure values in the third column are represented in inches Mercury(vacuum).The gauge numbers shown in that third column all are vs atmospheric pressure at sea level (14.7psia).
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6/16/13 Pressure and Temperature Chart of Ammonia - <i>NH<sub>3</sub></i>
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