Product Manual

3-10
Figure 4
NOTE
DO NOT open acetylene cylinder valves more than 1-1/2 turns
and preferably no more than 3/4 turn. Keep the cylinder valve
wrench, if one is required, on the cylinder valve so that the
cylinder may be turned off quickly, if necessary.
3.03 HOSES
Welding hoses transport low-pressure gases from the regulators
to the cutting or welding torch. Industrial welding hose is usually
color coded for gas service identification. Oxygen hoses are green.
Fuel hoses are red. Some countries may use blue to identify oxygen
hoses.
CAUTION
Examine the hoses carefully before each use. If you find cuts,
burns, worn areas of damaged fittings, replace or properly
repair the hose before use.
Use the following procedure to clear manufacturer’s residue if using
a new hose for the first time:
1. Connect the hose to the regulators. Tighten the connections
firmly with an open-end wrench.
2. Adjust the oxygen regulator to allow 3 to 5 PSIG to escape
through the hose. Allow the oxygen to flow 3 to 5 seconds to
clear the hose of dust and preservative.