SET-UP AND SAFE OPERATING PROCEDURES
3-9
0056-0114
WARNING
NEVER USE OXYGEN:
In pneumatic tools•
In oil pre-heating burners•
To start internal combustion engines•
To blow out pipelines•
To dust off clothing or work area•
To create pressure•
For ventilation•
In short, under no circumstances use oxygen as a substitute for compressed air or
other gases. Use oxygen only for appropriate oxy-fuel cutting, heating and welding
applications
Oxygen Valve Outlet and Regulator Inlet Connections
CGA 540 up to 3000 PSIG•
CGA 577 up to 4000 PSIG•
CGA 701 up to 5500 PSIG•
3.02 ACETYLENE
Acetylene is a compound of carbon and hydrogen (C
2
H
2
). It is a versatile industrial fuel gas used in cutting,
heating, welding, brazing, soldering, flame hardening, metallizing, and stress relieving applications. It is
produced when calcium carbide is submerged in water or from petrochemical processes. The acetylene gas
produced is then compressed into cylinders or fed into piping systems. Acetylene becomes unstable when
compressed in its gaseous state above 15 PSIG. Therefore, it cannot be stored in a “hollow” cylinder under
high pressure the way oxygen, for example, is stored. Acetylene cylinders are filled with a porous material
(calcium-silicate) creating, in effect, a “solid” as opposed to a “hollow” cylinder. The porous filling is then
saturated with liquid acetone. When acetylene is pumped into the cylinder, it is absorbed by the liquid acetone
throughout the porous filling. It is held in a stable condition (see Figure 2). Filling acetylene cylinders is a
delicate process requiring special equipment and training. Acetylene cylinders must, therefore, be refilled
only by authorized gas distributors. Acetylene cylinders MUST NEVER be transfilled.
Industrial Gases
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