To support all the weight they have to and remain strong and sturdy, different metals need to be fused to combine the strengths of both materials. This equipment is super easy to use and minimizes the welding cost dramatically. An Oxy-Acetylene outfit is portable, less expensive and more versatile than a electric welding … The nozzle is moved in slightly side-to-side or circular motions to ensure consistent heating and achieve an even fusion. Welding Headquarters is the site where I share everything I've learned. Then, by means of electrolysis, a mixture of air and water are separated by liquid oxygen. Lighting, adjusting and shutting down an oxygen-acetylene torch is easy – especially when following the proper procedures. The temperature of the flame is hot enough to melt the edges of the metal, and hence, fuse two metal pieces together. Thus, this results in less cylinder handling. Oxygen is obtained from the air where the air itself contains oxygen (21%), also contain nitrogen (78%), argon (0.9%), neon, hydrogen, carbon dioxide, and other elements that form a gas. Flame traps. Carburizing flame contains an excess of acetylene gas. In this technique, the blowpipe is held in the right hand, which forms a weld that runs from right to left. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. As you can tell by the name, an oxidizing flame has a high content of oxygen (the oxygen and acetylene ratio being 1.5:1). Different types of flames are used to weld different types of metals. This site is owned and operated by Muller Media LLC. The primary components of Oxy-Acetylene welding equipment are separate gas cylinders for oxygen and acetylene. There are specially-designed devices called Flashback Arrestors that are fitted between the regulators and hoses as a safety measure. The V-angle is smaller, and there is less distortion. When oxygen and acetylene are mixed in right proportions within a blowpipe or hand-held torch, they can produce a very hot flame, with a temperature as high as 3,200 degrees. And this welding process is still very popular today, mainly because it does not require much equipment, and does not require power. You should make sure that you do not keep the filler rod dipped into the pool continuously as it would act as a hindrance to thorough heating and keep the heat from the flame to reach the lower parts of the weld, and this might result in an imperfect fusion. Once the flame ceases to smoke, increase the oxygen supply slowly by means of the control valve. Neutral Flame: Pressure oxygen and acetylene the same. At this point, the rod is melted onto this sweating surface in small deposits. For welding or cutting, using Oxy-fuel is not only a common method to apply in a workshop but more than it. In the application, the result is very satisfactory for welding carbon steel, mainly sheet metal and thin-walled pipes. Although it depends on the application, generally, oxygen should be set at 40 psi, and acetylene should be set at 10 psi. Bronze welding, as the name implies, is used when there is a need to make joints in copper or make repairs to cast iron. While screws can hold metal pieces together, that’s not enough for these large structures. When mixed in the right proportions a hot flame is produced with a temperature of about 3,500℃. Oxy-acetylene welding is a very common welding process. It is used for welding nickel, Monel metal, high-carbon steel, and a number of non-ferrous metals. The supply of acetylene gas to the blowpipe should be adjusted up to the point the flame stops to smoke. For metal plates that are more than 4mm in thickness, the rightward technique is recommended. This type of flame is used in most welding operations since the chemical effect of this flame on heated metal is the least. and acetylene as welding gases dates back to the 1890’s. The difficult problem is between Nitrogen and Oxygen. So that needs oxygen purification repeatedly. Every hose has a check valve that offers automatic safeguarding by incorporating a non-return valve. This temperature provides enough heat to melt most metal. The chemical reaction between acetylene and oxygen is exothermic in nature. As a welder, you must know how to use oxy-acetylene torch to upgrade your skill in welding. It cannot be used to weld steel as it will oxidize it. It is a device that saves acetylene and oxygen from being wasted when the welding or cutting torch is not in use. It is the welding or cutting torch where the two gases, oxygen, and acetylene finally mix. They are ignited and burned at the nozzle of the torch. It allows the welder to get an even build-up and a very uniform penetration bead. Oxidizing Flame: We use more oxygen than acetylene. Oxyacetylene Welding (OAW) • by WAQAS AHMED 2. Note Acetylene is supplied in cylinders under a pressure of about 15 bar but welding is carried out with torch gas pressures typically up to 2 bar. Duration: One Week Course Reference Code: WBQ1OXY Suitable For:-This course and qualification is suitable for the beginner, for those seeking to start a career in welding or for the hobbyist seeking to develop some basic skills. Almost every welder knows how cool it is to use an oxy-acetylene torch for welding and cutting, heating, and soldering metal with ease. Oxy-acetylene flame may also be used for all types of brazing. Proper care of oxy-acetylene cutting and welding equipment. Navy FR Cotton... Reusable Half Face Cover, NASUM M101 Face Cover,... Make sure that you’re always wearing protective clothing (flame-retardant overalls) and protective eye goggles, The acetylene gas cylinder valve should have a spindle key, The gas cylinders should be stored in an upright position, Check for leaks with a soapy solution and not with a naked flame, Do not carry out any makeshift repairs on your welding equipment, Prevent the contact of your oxygen equipment with oil or grease at all times, Clean enclosed vessels thoroughly before welding them, If you’re working in an enclosed vessel, make sure you aren’t alone and that the gas cylinder is always outside, Fire-fighting equipment should be available on the ground, Turn the gas supply off immediately if you detect a leak in the hose. A member has noted a number of incidents resulting in fires caused by perished hoses and flashbacks involving oxy-acetylene cutting equipment, and has shared the following information with IMCA for use as part of a safety flash. Save my name, email, and website in this browser for the next time I comment. 3. This layer of hard deposit is resistant to wear. Usually, we use this flame for cutting materials from carbon steel. I'm Pierre Young. Oxygen Acetylene Welding (OAW) Process and Equipment: Oxy Acetylene Welding Set Up and Pressure Settings Chart : Shielded Metal Arc Welding Machine Parts And Process. In the commercial world, to produce a reaction Oxyacetylene do activities calcium carbide and water. Oxy-Acetylene welding requires a specific skill set and thorough practice, coupled with which it can be used to weld virtually any metal! I hope the above article can helpful for you who study Oxygen Acetylene Welding or OFW Welding. The filler rod is moved forward in a circular motion, with the blowpipe moving steadily along the seam of the weld. As mentioned above, the flame has to be adjusted to appear a certain way before you can proceed with the Oxy-Acetylene weld. Video for my high school students to follow as they learn the process of using the Oxy-Acetylene torch. Flame traps (also called flashback arresters) must be fitted into both oxygen and acetylene gas lines to prevent a … In this technique, it is important that the edges of the metal to be welded are not melted but heated until they become red. ADVERTISEMENTS: Subject-Matter of Oxy-Acetylene Cutting Process: In modern steel-age the steel-makers cut Iron and Steel by oxy-acetylene, oxy-hydrogen, oxy- propane, oxy-natural gas cutting blowpipes easily, speedily, and cleanly. Oxy-Acetylene is a volatile mixture of pure oxygen gas and acetylene gas. The first we must Clean the nozzle, because if the head of the nozzle dirty will cause flame bad. Proportions are harnessed and modulated properly, the gas will start to leak two metal pieces together the of... Site where I share everything I 've learned from hands-on experience what welding gear works and what does n't trace! 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