*NOTE: When Acetylene welding tips are used with fuel gases, use one size larger tip and maximum pressures to obtain proper heat.
See Chart below for approximate torch Oxygen consumption with a neutral flame ration for various gases:
1.1 Oxygen to 1 Acetylene
2 Oxygen to 1 MAP//Pro®/Propylene
4 Oxygen to 1 Propane/Propyelene
NOTE: Gas consumption data is merely for estimating purposes. It will vary due to material, skill of the operator and the working conditions. Pressures are approximate for hose length up to 25 ft.; increase for longer lengths about 3 PSIG per 25 ft.-increase working pressure 2-3 PSIG for check valves. Acetylene delivery pressure should not exceed 15 PSIG under flow conditions.
WARNING: The withdrawl reate of an individual Acetylene cylinder should not exceed 1/7 (approx. 15%) of the cylinder contents per hour. If additional flow capacity is required, use manifold systems of sufficient size to allow cylinders (especially Oxygen) to become completely empty while in use. Check for adequate gas supplies before starting work, (order gas at 1/4 cylinder contents) especially with larger heating tips. Purge all hoses and torch passages before each torch lighting and use to vent out mixed gases with can cause a flashback if ignited (VENT GASES SAFELY)
Information:
Note: Approximate Gross BTU Contents per Cubic Foot ( after vaporization or gasification)
Acetylene- 1470
Butane- 3374
Propane- 24