ADOPTS WITHOUT AMENDMENTS:

International Fire Code 2018 (IFC 2018)

Part I — Administrative

Part II — General Safety Provisions

Part III — Building and Equipment Design Features

Part IV — Special Occupancies and Operations

Part V — Hazardous Materials

Part VI — Referenced Standards

Part VII — Appendices

Heads up: There are no amended sections in this chapter.
This appendix is for information purposes and is not intended for adoption.

User note:

About this appendix: Appendix G gives the fire code official and registered design professional a ready reference tool for the conversion of the liquid weight and volume of cryogenic fluid to their corresponding volume of gas and vice versa and is a companion to the provisions of Chapter 55 of this code.

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 FLUIDWEIGHT OF LIQUID OR GASVOLUME OF LIQUID AT NORMAL
BOILING POINT
VOLUME OF GAS AT NTP
PoundsKilogramsLitersGallonsCubic feetCubic meters
Argon1.0000.4540.3260.0869.670.274
2.2051.0000.7180.19021.320.604
3.0721.3931.0000.26429.710.841
11.6285.2743.7851.000112.453.184
10.3404.6903.3660.889100.002.832
3.6521.6561.1890.31435.311.000
Helium1.0000.4543.6310.95996.722.739
2.2051.0008.0062.115213.236.038
0.2750.1251.0000.26426.630.754
1.0420.4733.7851.000100.822.855
1.0340.4693.7540.992100.002.832
0.3650.1661.3260.35035.311.000
Hydrogen1.0000.4546.4091.693191.965.436
2.2051.00014.1303.733423.2011.984
0.1560.0711.0000.26429.950.848
0.5910.2683.7851.000113.373.210
0.5210.2363.3390.882100.002.832
0.1840.0831.1790.31135.311.000
Oxygen1.0000.4540.3970.10512.000.342
2.2051.0000.8760.23126.620.754
2.5171.1421.0000.26430.390.861
9.5274.3213.7851.000115.053.250
8.2813.7563.2900.869100.002.832
2.9241.3271.1620.30735.311.000
Nitrogen1.0000.4540.5610.14813.800.391
2.2051.0001.2370.32730.430.862
1.7820.8081.0000.26424.600.697
6.7463.0603.7851.00093.112.637
7.2453.2864.0651.074100.002.832
2.5581.1601.4360.37935.311.000
LNGa1.0000.4541.0520.27822.9680.650
2.2051.0002.3200.61350.6461.434
0.9510.4311.0000.26421.8120.618
3.6001.6333.7851.00082.622.340
4.3561.9764.5801.210100.002.832
11.5015.2171.6160.42735.311.000

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 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).

UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING