In normal usage in an oxy/acetylene cutting torch, the acetylene hose is red and the oxygen hose is green.
Acetylene will change colour from orange to colourless.
Because it is also known as Dissolved Acetylene cylinder ...thus DA cylinder
Oxygen and acetylene hose fittings are made with different screws to prevent connecting the wrong gas to the hoses.
Oxygen tank, Acetylene tank, regulators for each tank, hoses, a torch, and a striker. Check valves are also a good idea if they're not already installed.
Red for the combustible gas (Acetylene - MAPP - Propane), green for the Oxygen. All Oxy-fuel torches use these hose colors.
As far as I am aware. The gauges themselves are the same. Usually brass. Unless someone has painted them. The hoses on the other hand are red and green. The red being for the acetylene. A lot of times the tanks will be painted the same way although I have seen some acetylene tanks painted black.
If there is pressure in the tank it may be possible to use it. If not I wouldn't recommend it. In the tank there are blocks of material and Acetone. These absorb the Acetylene allowing it to be charged to 300 PSI. If the Acetone (it is in liquid form) has leaked out the Acetylene could explode if the cylinder is recharged. Acetylene pressure is RED LINED at 35PSI.
There are no ECM hoses. The ECM is the Electronic Control Module.
Acetylene is different from most gasses in a tank. An acetylene tank is not hollow- it contains a porous material (think of a hard sponge) that is saturated with liquid acetone. When acetylene is pumped into the tank under pressure, it dissolves in the liquid. This is similar to how carbon dioxide dissolves in a soda (in a bottle or an) under pressure. While in the tank, it is mainly in a liquid.
They aren't, which is why you should never have them laying near your work area. What I do is drape them over my shoulder and keep them behind me.
Pop off valve