- Acetylene is highly unstable.
- High pressure or temperatures can result in decomposition that can result in fire or explosion.
- Acetylene cylinders must never be transported or stored in a closed vehicle.
Subsequently, Do you turn off oxygen or acetylene first? We recommend closing the oxygen valve first whenever turning off an oxy-fuel torch system especially when Acetylene is fuel.
Can you transport acetylene in a car? Use a well-ventilated vehicle to transport acetylene. Many acetylene cylinders are collected and transported in unventilated vehicles. In the event of a leak – no matter how minor – gas can build up in an unventilated vehicle and result in a fire or explosion. This risk rises over prolonged storage periods.
Yet, Which is safer propane or acetylene? Acetylene will ignite at mixtures from 2.5 percent to 82 percent, while the range for propane is 2.1 percent to 9.5 percent. Based off of these numbers, it’s easy to argue that propane is much safer to use than acetylene. However, keep in mind that these are both flammable gases, and both need to be handled with care.
Can you store acetylene outside? Acetylene cylinders must be always stored in the upright position with valve caps on. Take care to store small cylinders properly as they don’t have protection caps on them. Acetylene cylinders are not designed for use in environments where the temperatures may exceed 52oC (125oF).
How far do you open an acetylene tank?
The cylinder valve shall always be opened slowly. 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 my cutting torch popping?
The reason that an oxyacetylene cutting torch will pop and go out is because of a problem with gas flow. Usually this is either an issue with flow settings, a leak or blockage.
What pressure should acetylene torches be set at?
The acetylene regulator should be between 5-7 psi.
What causes acetylene to explode?
If a cylinder filled with compressed acetylene gas is exposed to a flashback, starts to warm up or vibrate, or if such a cylinder was involved in a fire, its contents may have begun to decompose. This process can become self-sustaining causing the cylinder to explode, in some cases hours after the initiating event..
Can you use acetylene without oxygen?
Decomposition is a chemical reaction whereby acetylene breaks down into its constituent elements, carbon and hydrogen. This reaction gives out a great deal of heat, which can cause the gas to effectively ignite without the presence of air or oxygen.
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.
Can acetylene tank explode?
Acetylene is highly unstable. High pressure or temperatures can result in decomposition that can result in fire or explosion. Acetylene cylinders must never be transported or stored in a closed vehicle.
Can you cut with just acetylene?
The blow torch is essentially a metal tube that mixes acetylene – an odorless colorless hydrocarbon gas – and oxygen to create a very hot pinpoint flame. That flame can be used for cutting and welding (although it’s not as efficient a way to weld metal as electric arc welding).
What is the maximum draw rate per hour of a tank of acetylene?
Acetylene is limited to a maximum continuous withdrawal rate of 1/7 of the cylinder’s rated capacity when full. Example: An acetylene cylinder that has a capacity of 330 cubic feet has maximum withdrawal rate of 47 cubic feet.
Why are acetylene cylinders kept upright?
Cylinders should be used or stored only in an upright position to avoid the possibility of the acetone leaking from the cylinder. If this is not possible, it is recommended that the cylinder be placed upright and left to stand for one-half hour before using.
What PSI should acetylene be?
A full acetylene cylinder which has a pressure of 250 psi at 700F (1725 kPa at 20 C) will have a pressure of 315 psi at 900F (2175 kPa at 310C) and a pressure of 190 psi at 500 F (1300 kPa at 90C). You must always take temperature into account when estimating how much acetylene the cylinder contains.
What pressure should I set my oxygen and acetylene?
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 …
What happens when acetylene goes over 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.
How long does acetylene need to be upright?
Acetylene cylinders must be transported and stored vertically. If acetylene cylinders have been found laying on their side, allow them to stand in an upright position for at least 30 minutes before use. Acetylene cylinders contain a porous mass and liquid acetone that dissolves the gas.
Can you use Teflon tape on acetylene fittings?
NEVER use PTFE tape or any other form of thread sealing product when setting up gas equipment. Combustible Gas fittings (Propane, Acetylene etc) will be LEFT HAND THREADS, this will be indicated by little nicks in the corners off the nuts.
