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Category 1
– Natural Gas –
Contains Methane & Ethane.
Sour Natural Gas
Contains Hydrogen Sulfide
Which Corrodes Copper & Brass.
It Has A Heat Valve Of
900 to 1200 B.T.U. Per-Cubic-Foot.
Specific Gravity Is 0.65 To 0.70.
Category 2
– Mixed Gas –
Contains A Mixture Of
Natural & Manufactured Gases.
It Has A Heat Valve Of 700 to 900
B.T.U. Per-Cubic-Foot.
Specific Gravity Is 0.5.
Category 3
– Manufactured Gas –
Made From Coal & Petroleum.
It Has A Heat Valve Of 500 to 700
B.T.U. Per-Cubic-Foot.
Specific Gravity Is 0.38 To 0.40.
Category 4
– Liquefied Petroleum (L.P.) Gas –
Made Of Propane Or Butane.
Is Converted To A Liquid State
Under Moderate Pressure For
Easy Transportation In
Pressurized Tanks.
Propane Has A Heat Valve Of
2500 B.T.U. Per-Cubic-Foot.
Specific Gravity Is 1.53.
Gas Fuel Properties
Summary