ADOPTS WITH AMENDMENTS:

International Fire Code 2012 (IFC 2012)

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Appendix G Cryogenic Fluids—Weight and Volume Equivalents

AMENDMENT
This section has been amended at the state or city level.
The provisions contained in this appendix are adopted in the District of Columbia.
This appendix is used to convert from liquid to gas for cryogenic fluids.
Table G101.2 shall be used to determine the equivalent amounts of cryogenic fluids in either the liquid or gas phase. 
TABLE G101.2
WEIGHT AND VOLUME EQUIVALENTS FOR COMMON CRYOGENIC FLUIDS
CRYOGENIC FLUID WEIGHT OF LIQUID OR GAS VOLUME OF LIQUID AT NORMAL
BOILING POINT
VOLUME OF GAS AT NTP
Pounds Kilograms Liters Gallons Cubic feet Cubic meters
Argon 1.000
2.205
3.072
11.628
10.340
3.652
0.454
1.000
1.393
5.274
4.690
1.656
0.326
0.718
1.000
3.785
3.366
1.189
0.086
0.190
0.264
1.000
0.889
0.314
9.67
21.32
29.71
112.45
100.00
35.31
0.274
0.604
0.841
3.184
2.832
1.000
Helium 1.000
2.205
0.275
1.042
1.034
0.365
0.454
1.000
0.125
0.473
0.469
0.166
3.631
8.006
1.000
3.785
3.754
1.326
0.959
2.115
0.264
1.000
0.992
0.350
96.72
213.23
26.63
100.82
100.00
35.31
2.739
6.038
0.754
2.855
2.832
1.000
Hydrogen 1.000
2.205
0.156
0.591
0.521
0.184
0.454
1.000
0.071
0.268
0.236
0.083
6.409
14.130
1.000
3.785
3.339
1.179
1.693
3.733
0.264
1.000
0.882
0.311
191.96
423.20
29.95
113.37
100.00
35.31
5.436
11.984
0.848
3.210
2.832
1.000
Oxygen 1.000
2.205
2.517
9.527
8.281
2.924
0.454
1.000
1.142
4.321
3.756
1.327
0.397
0.876
1.000
3.785
3.290
1.162
0.105
0.231
0.264
1.000
0.869
0.307
12.00
26.62
30.39
115.05
100.00
35.31
0.342
0.754
0.861
3.250
2.832
1.000
Nitrogen 1.000
2.205
1.782
6.746
7.245
2.558
0.454
1.000
0.808
3.060
3.286
1.160
0.561
1.237
1.000
3.785
4.065
1.436
0.148
0.327
0.264
1.000
1.074
0.379
13.80
30.43
24.60
93.11
100.00
35.31
0.391
0.862
0.697
2.637
2.832
1.000
LNGa 1.000
2.205
0.951
3.600
4.356
11.501
0.454
1.000
0.431
1.633
1.976
5.217
1.052
2.320
1.000
3.785
4.580
1.616
0.278
0.613
0.264
1.000
1.210
0.427
22.968
50.646
21.812
82.62
100.00
35.31
0.650
1.434
0.618
2.340
2.832
1.000
For SI: 1 pound = 0.454 kg, 1 gallon = 3.785 L, 1 cubic foot = 0.02832 m3, °C = [(°F)-32]/1.8, 1 pound per square inch atmosphere = 6.895 kPa.
  1. The values listed for liquefied natural gas (LNG) are "typical" values. LNG is a mixture of hydrocarbon gases, and no two LNG streams have exactly the same composition.
To use Table G101.2, read horizontally across the line of interest. For example, to determine the number of cubic feet of gas contained in 1.0 gallon (3.785 L) of liquid argon, find 1.000 in the column entitled "Volume of Liquid at Normal Boiling Point." Reading across the line under the column entitled "Volume of Gas at NTP" (70°F and 1 atmosphere/14.7 psia), the value of 112.45 cubic feet (3.184 m3) is found.
If other quantities are of interest, the numbers obtained can be multiplied or divided to obtain the quantity of interest. For example, to determine the number of cubic feet of argon gas contained in a volume of 1,000 gallons (3785 L) of liquid argon at its normal boiling point, multiply 112.45 by 1,000 to obtain 112,450 cubic feet (3184 m3).
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