Why is acetylene more dangerous than propane?

The flammability limit of acetylene in the air is 2.5% to 82%, whereas that of propane is 2.1% to 9.5%. This may lead to a conclusion that acetylene is more dangerous than propane; however, the same is not true. Acetylene’s specific gravity 0.9 so it is lighter than air. If gas leaks out it will rise.

Propane can like acetylene be used for cutting. Acetylene releases almost 40% of its heat in the inner flame cone. Therefore, acetylene is better for cutting than propane. While temperature wise acetylene is hotter than propane the fact is that people are using propane for cutting incorrectly.

One may also ask, can you use an acetylene tip with propane? Propane needs a different cutting tip because it does not burn as fast as acetylene. You can use propane with a acetylene heating tip, but it will not be as good if you use a heating tip designed for propane.

Also to know, why is acetylene so dangerous?

If acetylene were to be stored as a compressed gas in cylinders (in the same way as other gases) it would be very unstable and could decompose explosively. For this reason, it is dissolved in a solvent, which allows greater quantities of the gas to be stored at a lower pressure in a safe manner.

What is the difference between LPG and acetylene?

Acetylene will ignite at mixtures from 2.5% to 82%, Propane is 2.1% to 9.5%. From these figures, Acetylene burns faster than Propane.

Cost Comparison.

LPG ACETYLENE
Heat Production Uses more oxygen in heating but produces more heat in a larger area Uses less oxygen in heating but produces less heat in an equivalent area

Can I weld with a propane torch?

An oxygen/propane torch provides sufficient heat for brazing. The kind and thickness of metal to be welded determine the proper choice of welding rod. Welding is only one part of metalworking. You also can cut steel, using oxygen/acetylene equipment with a special head called a cutting torch.

Is acetylene bad to breathe?

The symptoms of acetylene inhalation include diz- ziness, headache, fatigue, nausea, vomiting, tachycardia and tachypnea [2]. Exposure to a high concentration of acetylene may result in a loss of consciousness and death [1] . Acetylene is a colorless gas commonly used for welding.

Can I braze with propane torch?

Brazing with Propane. Here is the answer to whether you can braze with a propane / air torch. You can but you have to control the environment so that the heat loss to the atmosphere and parts is lower than the heat being put into the braze joint. It is a standard braze alloy that melts over a range of 1250 – 1305 F.

Can I weld with propane and oxygen?

The only real downside to using Oxy/Propane is that it can’t be used for actual Welding. Oxygen and Propane fuelled kits are however, ideal for Silver Solder, Brazing, Cutting and Heating. So as long as you don’t want to Weld, Oxygen and Propane is a great way to go!

Can propane burn without oxygen?

In the presence of excess oxygen, propane burns to form water and carbon dioxide. When not enough oxygen is present for complete combustion, propane burns to form water and carbon monoxide. Unlike natural gas, propane is heavier than air (1.5 times denser).

What should oxygen and acetylene be set at?

RULE OF THUMB (MULTI-HOLE CUTTING TIPS, OXY / ACETYLENE) Recommended oxy/acetylene cutting tip pressures vary with size. If you have no manufacturer setting- information, and are cutting less than 1 ½” thick steel, set the acetylene regulator for 10 psig, and the oxygen regulator for 40 psig.

How do you weld with propane?

Welding With a Propane Torch Touch the torch’s flame to the objects you wish to weld together. Allow the weld to set and harden overnight. Tip. Warning. Never use a butane lighter to spark your propane torch. Butane is highly combustible and should not be used near contained propane gas.

Do you turn off oxygen or acetylene first?

Shut off oxygen first or acetylene first? To shut down the torch, close the acetylene torch valve first, then the oxygen. (A ‘pop’ may occur if you reverse the order. The pop throws carbon soot back into the torch, which may partially plug the gas passages.)

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.

What does acetylene smell like?

Acetylene is not especially toxic, but when generated from calcium carbide, it can contain toxic impurities such as traces of phosphine and arsine, which give it a distinct garlic-like smell. It is also highly flammable, as are most light hydrocarbons, hence its use in welding.

Can acetylene tanks 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.

Why do acetylene cylinders keep vertical?

Because acetylene cannot be highly compressed due to explosion hazard. So it is stored in cylinders which are filled with a porous gypsum-like material and liquid acetone. The cylinders need to be kept upright so that only the gas comes out, not the acetone.

What is inside of an acetylene tank?

Acetylene gas is mixed in liquid acetone for safe storage and usage. Acetone in acetylene cylinders helps stabilize the gas making it non-reactive within the cylinder. In this process, acetylene is dissolved in liquid acetone under high pressure. The cylinder is then filled with porous material like firebrick.