Table of Contents
Do you turn on oxygen or acetylene first?
OXY-ACETYLENE We recommend closing the oxygen valve first whenever turning off an oxy-fuel torch system especially when Acetylene is fuel. This is only part, but a very important part, of the complete safe operating procedure recommended for torches by Harris.
What pressure should oxygen and acetylene be set at?
The gas pressures should be set at 3 to 5psi for Acetylene, and 20 to 30psi for the oxygen, but when you squeeze the oxygen lever after the initial flame adjustment of the preheat flames to neutral just to a point where the feather disappears,the oxygen cutting stream should be visible and at least 4 inches in length May 18, 2005.
Is acetylene flammable or explosive?
Acetylene is an extremely flammable gas and can form an explosive atmosphere in the presence of air or oxygen.
Why is my torch popping?
Overheated Nozzle If the popping is only happening after you’ve been using the torch for a while, like maybe after half an hour or so, it might be because the nozzle is getting too hot. Turn off the torch with the torch valves. When the flame is out, open up the oxygen valve. Then dunk the nozzle in water.
What should oxygen be set at on torch?
The recommended setting for multi-hole cutting is the oxygen regulator at 40 PSIG, with the acetylene regulator setting at 10 PSIG.
When shutting down the torch you need to be certain that?
Make sure that main valves are off and the regulator pressure adjusting screws are backed out with no pressure readings on the gauges. Ensure torch valves are off. You just studied 12 terms!.
What should my oxygen level be?
A normal level of oxygen is usually 95% or higher. Some people with chronic lung disease or sleep apnea can have normal levels around 90%. The “SpO2” reading on a pulse oximeter shows the percentage of oxygen in someone’s blood. If your home SpO2 reading is lower than 95%, call your health care provider.
How far do you turn the oxygen cylinder on?
Using the cylinder wrench, turn the oxygen cylinder valve at least one half turn counter-clockwise. Check the pressure gauge to ensure that there is ample oxygen in the tank (full is approx. 2000 psi). Adjust the pulse rate as prescribed by your physician and demonstrated by your CRC representative.
What happens to acetylene above 15 psi?
Acetylene will not explode under low pressure at normal temperatures. However, it becomes unstable and spontaneously combustible when compressed to a pressure over 15 psi. Beyond 29.4 psi, it becomes self explosive, and a slight shock may cause it to explode even in the absence of air or oxygen.
Can you breathe acetylene?
* Breathing Methyl Acetylene can irritate the nose and throat. * Breathing Methyl Acetylene can irritate the lungs causing coughing and/or shortness of breath. Higher exposures can cause a build-up of fluid in the lungs (pulmonary edema), a medical emergency, with severe shortness of breath.
Can acetylene be stored indoors?
General advice Only use acetylene in well-ventilated areas. Acetylene is lighter than air, which means it can rise into roof spaces and empty areas.
At what temperature will acetylene not ignite?
The flashpoint of acetylene is -0.7 degrees Fahrenheit or -18.15 degrees Celsius, which is a long way below the 199.4 degrees Fahrenheit or 93 degrees Celsius top limit for flammability.
What should I set my oxy acetylene gauges to for brazing?
Oxygen and acetylene should be set at equal delivery amounts depending on the size and mass of the object being brazed. This would translate into 5 psi oxygen and 5 psi acetylene. These pressures are delivery pressures that must be set as the gas is flowing from the torch tip.
How far should acetylene valves be turned on?
An acetylene cylinder valve shall not be opened more than one and one-half turns of the spindle, and preferably no more than three-fourths of a turn.
Why is the oxygen turned on for a moment after a tip is cleaned?
Buy a new tip. Why is the oxygen valve turned on before starting to clean a cutting tip? To blow away any debris.
What is a rosebud torch tip?
The Little Torch™ rosebud torch tip features a multiple orifice design that allows for maximum heating/melting power and increased versatility for melting gold, silver, or bronze in a crucible. The copper tip is 6 inches long and melts up to 3 troy ounces (93.31 grams) of metal.
What is the normal working pressure for acetylene?
The working pressure of acetylene equipment is critical: Acetylene pressure must not exceed 0.62 bar (9psi) unless equipment has been specifically designed for it.
What is the ratio of oxygen and acetylene in gas cutting?
Natural Gas Table : Fuel Gas Characteristics Fuel Gas Maximum Flame Temperature °C Oxygen to fuel gas Ratio (vol) Acetylene 3,160 1.2:1 Propane 2,828 4.3:1 MAPP 2,976 3.3:1.
Why does my oxygen regulator keep blowing?
The high pressure passage of the oxygen through the narrow valve creates heat. Any flammable material on the valve, including dirt, oil, grease or other hydrocarbons, can ignite under this heat. The resulting fire often triggers an explosion, turning parts of the regulator into high-temperature projectiles.
What pressure should never be exceeded in an acetylene hose?
The operating pressure for acetylene should never exceed 15 psi. Acetylene has no detectable odor. A cylinder cart should be used to move gas cylinders.
How do you set up oxy acetylene equipment?
Separately purge both oxygen and fuel gas lines. Open fuel gas valve 1/2 turn. Ignite flame with striker. Increase fuel gas flow until flame leaves end of tip and no smoke is present. Decrease until flame goes back to tip. Open oxygen valve and adjust to neutral flame. Depress oxygen lever and make necessary adjustments.
