Oxyfuel Setup

In order to use a cutting torch, i m sorry for many fabricators is taken into consideration essential, you must use oxygen combined with an additional fuel in order to develop an oxidizing cut flame. In this case, the oxygen hose is invariably green, and also the fuel hose is always red. The species of fuel offered vary however the most commonly used room propane and acetylene. Organic gas, methylacetylene-propadiene (MAPP), and also propylene are also used.

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In bespeak to prevent accidental confusion between the two hoses on the manifold finish or top top the cut torch end, manufacturers intentionally create them to be unthreadable. This means that every fuel hoses have left-hand threads with a notched nut, and also the oxygen hose has actually right-hand threads without a notch.

The amount of gas and oxygen the come the end of their corresponding cylinders is regulated by regulators. These space valves that assist manage how much oxygen or fuel is permitted to come the end at once. It controls the PSIG (Pound-force per square inch). Regulators are an essential because because that a gas like acetylene, i m sorry is very volatile, an overfill of pressure have the right to mean life or death. This is why gas cylinders should constantly be locked in a secure place like ~ above a cylinder cart.


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Air Hoses

Air hoses are one more essential come doing welding work-related in a shop. They administer the pressure vital for pneumatic (air) tools to function. Die grinders, needle guns, edge grinders, and influence guns space all points that use air hoses.

Air hoses attach to the manifold and also to pneumatic tools with a various fitting 보다 gas and oxygen hoses. Whereas gas and oxygen have a hex-style head that deserve to be tightened v your typical crescent wrench, wait hoses have actually a male-female style coupling. The female finish has a fitting that recedes to allow the male end to couple. As soon as they space together you deserve to let walk of the receding fitting.

Air hoses frequently are red, but they deserve to be yellow, black, or blue as well. The reason why the color is not as huge of an issue with waiting hoses is since of the distinctive fitting. That not possible to confuse them through other species of hoses.


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Maintenance

Maintenance the gas hoses, particularly flammable gases, is most essential for safety in a shop environment. While ragged hoses leaking compressed air have the right to pose a safety hazard, that usually much less serious 보다 acetylene leaking into an area wherein welding is being done. Here’s just how to locate and fix a leak in a hose.

Pressure fall Test

A drop check is when an oxyfuel system is tested for leaks. To do a fall test very first ensure the all connections and also regulators are tight and also secure (be sure the torch is associated too). Secondly, through the regulator valves closed and also standing come the side of the regulator, open up the valves that the cylinders slowly (no more than about a half turn for fuel).

Next, set the regulator valves to the ideal pressure because that oxygen and also the gas that you room using. Then, nearby the valves that the cylinders and wait a couple of minutes. Go earlier and look in ~ the regulators. If your pressure has dropped, it method somewhere in your setup you have a leak.


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Finding the Leak

Once friend have identified that you have actually a leak, start looking for obvious signs the its whereabouts. This contains the odor of fuel, sound of oxygen or gas being released, dust gift blown around, etc. If you view no apparent signals, ensure when again that all of your fittings room tightened.

If girlfriend still can’t uncover the leak, take a spray bottle of soapy water and spray under the entire system. This will certainly make it obvious where your leak is because it will start bubbling in ~ the location.

Repairing the Leak

Most of the time you have actually a leak, you can temporarily resolve it v tape designated because that gas hoses. Over there are also hose repair kits that you can pick up at your regional welding supply store. It may require splicing the hose and also applying new fittings, all things that this kits space equipped to do.

Air Hoses

A leak in an air hose will certainly be much much more obvious due to the fact that the press coming indigenous a compressed wait manifold is much higher. This is since you need sufficient pressure come make certain that your air devices have sufficient power to perform the job right. A an easy puncture in an air hose can cause it to flap approximately on the ground and is usually loud.

Hose Safety

Since hoses are linked to manifolds that deserve to really pack a beat as much as pressure, and often the pressure deserve to be flammable, it is the the utmost prestige that you practice caution when working v air and gas hoses. Here are some basic safety rules once working through hoses.


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Never usage Gloves v Gas Hoses

You could be thinking, “What’s the harm in obtaining a little much more leverage and also grip?” The worry is not the gloves itself however that occupational gloves space prone to acquiring soiled v grease, dirt, and also other contaminants that room accidental fuel for an oxyfuel system. Always tighten fittings clean, bare hands, and also with a crescent wrench.

Always rotate Off Valves once Repairing

If you are presenting things right into your gas and also oxygen currently such together wet epoxy, as can be included in a hose repair kit, you execute not want the gas to be able to mix through the uncured epoxy. It may seem apparent to keep the valves off when relocating gas lines to a different component of the manifold, act repairs, etc., but you can be surprised in ~ how often this is disregarded. Once working through a tight production schedule, human being often take shortcuts also if it deserve to jeopardize their very own safety and also the safety and security of others.

Disconnect waiting Hoses

It’s not simply gas and oxygen hoses that have to be disconnected or have actually their valves rotate off. Compressed air, while not necessarily flammable like propane or acetylene, deserve to be dangerous. This is especially true if you have a loose fitting the connects two sections the hose. Periodically the coupling will certainly not close all the way and the hose deserve to flap around. Relying on the size of the hose, this can reason serious personal injury. It’s much better to revolve off the valve in ~ the compressed wait manifold first.

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Conclusion

You can’t recognize everything about a welding hose based on its color. When the color can be helpful to identify whether that a gas heat or oxygen line, it relies upon the paper definition in which that is used. Component of this is due to the fact that the colour of hoses are not necessarily regulated. Over all, it’s vital to it is in attentive come your job-related area, maintaining your leads and lines straight and complimentary of debris, so that you have the right to prevent any type of unnecessary damages.