In gas welding, the heat required to melt the surfaces to be welded is supplied by a high temperature flame obtained by a mixture of two gases. Oxyacetylene gas welding process is widely used commercially for welding of ferrous and nonferrous metals particularly for thin sections up to 6 mm thick. Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. Describe the components and their function of oxyacetylene welding plant.
The other equipments serves the same function as in case of oxyacetylene gas welding. Oxygen and acetylene are the gases used to produce the welding flame. Oxy acetylene welding leaving certificate engineering notes. This temperature provides enough heat to melt most metal. Osha safety and health standards, 29 cfr 1910, available from u. However, it is still widely used for a variety of applications. Gas welding experiment gas welding i objectives giving. Gas cylinder is filled either by oxy acetylene gas, hydrogen gas, natural gas or other flammable gas. Describe the hazards and safety features of oxyacetylene welding plant. Here, the force from the gas velocity and the surface tension of the metal prevent the molten metal falling from the weld zone. Jan 25, 2017 oxy acetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. When the flame comes in contact with steel, it melts the surface forming a molten pool, allowing welding to take place.
A flux is used during welting to prevent oxidations and to remove impurities. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing. Oxyacetylene welding acetylene gas plant, acetylene. Oxyacetylene welding acetylene gas plant, acetylene plant. Nov 07, 2018 gas welding oxy acetylene,equipment details,types of flames,applications gas welding process pdf. When using an oxygenfuel gas process to perform welding or cutting, the operator. Oxyfuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure. Keep away from heat, hot surfaces, sparks, open flames and other ignition sources.
Oxy acetylene is the typical combination used in gas welding and is generally chosen for general cutting and welding work including work to repair rips and tears in metal. The chemical reaction between acetylene and oxygen is exothermic in nature. This flame in turn melts the metal faces of the two pieces to be welded, causing the liquified metal to flow between and join them. Gas welding experiment gas welding i objectives giving an. In oxy acetylene welding, oxygen and acetylene gas are combined in a torch handle to produce a flame that burns at over 6000 degrees fahrenheit. Oxyacetylene gas welding technique knowledge zone, the. Oxyacetylene and oxymapp methylacetylenepropadiene welding are two types of gaswelding processes. An introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. Open the valve on the acetylene cylinder no more than threefourths of a turn so it can be closed quickly in case of emergency. It can be used for cutting steel, welding steel, brazing and for heating metal. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from.
As the electrode movement is manually controlled hence it is termed as manual metal arc. By the end of this unit each apprentice will be able to. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. Based on the amount of oxygen taken from the oxygen cylinder, the flame produced in oxyacetylene gas. Welding welding is a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or without the application of pressure or by the application of pressure alone, and with or without the use of filler material. Unit 9 oxyacetylene welding plant and safety duration 6. In fact, the process uses fuel gases and oxygen to weld and cut metals, respectively. One of the most commonly used applications of acetylene gas is oxy acetylene welding, oxy welding, or gas welding.
The oxyacetylene welding process uses a combination of oxygen and acetylene gas in the approved ratio to provide a high temperature flame. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that. Acetylene is the only fuel gas suitable for gas welding because of its favourable flame characteristics of both high temperature and high propagation rates. Be sure cylinders are fastened with a chain as a protection against falling or rolling. The welding process is a complex process that involves heat and liquidmetal transfer.
Gas welding oxyacetylene welding in gas welding, a gas flame is used to melt the edges of metals to be joined. An introduction to gas welding oxyacetylene youtube. Oxyacetylene principle of operation a fusion welding process, heat is concentrated on the joint edges until the metal melts and starts to flow. The position of the welding rod and welding torch is almost same as the welding in horizontal position. Jan 14, 2017 in this video we will discuss about what is oxygen acetylene welding. Seminar on gas welding seminar report pdf download. Gap wirea wire used for correct spacing of butt joints. Oxyacetylene is the typical combination used in gas welding and is generally chosen for general cutting and welding work including work to repair rips and tears in metal. Box 1079 appleton, wi 549121079 usa equipment sales us and canada phone. For complete combustion of one unit volume of acetylene, 2. Oxyacetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases.
A complete, practical manual for gas welding and cutting practice. Operation oxygen and acetylene gas are burned at the tip of the nozzle on the welding torch. Each gas is contained in its own cylinder and combined through the use of separate hoses leading from regulators attached to the top of the cylinders. These gases are mixed in a welding torch and regulated to produce an impinging. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 degrees centigrade. Necessary considerations for gas welding fuel gases fuel gas for gas welding used is acetylene due to its high temperature in the flame. Oxyacetylene welding also known as oxyacetylene welding uses an oxyfuel gas flame can be applied with or without pressure can be applied with or without the use of filler materials 5. Oxy acetylene gas welding kits the welders warehouse. Giving an overview of the gas or oxy acetylene welding processes. Cutting with the oxyfuel process is just the opposite from of welding. Oxy acetylene welding is a welding process manually, in which the surfaces to be joined, which is warming to melt by a gas flame oxyacetylene with or without filler metal, where the connection process without emphasis. The oxyacetylene welding process combines oxygen and acetylene gas to provide a high temperature flame for welding.
Llc an itw welding company 1635 west spencer street p. Gas welding is also named as oxyfuel gas welding ofw. Thelittletorch kit top precision and control for your smallest oxyfuel jobs. Oxy acetylene gas welding process is widely used commercially for welding of ferrous and nonferrous metals particularly for thin sections up to 6 mm thick. A filler rod is used to deposit additional metal as necessary to merge the two base materials. Gas welding is probably the oldest of the welding processes and gas welding equipment is arguably the most versatile.
Weve worked hard to produce gas welding kits to suit as many applications, and pockets, as possible. Giving an overview of the gas or oxyacetylene welding processes. However, if it is used incorrectly, serious injury can occur to you and the equipment. The oxy acetylene welding process uses a combination of oxygen and acetylene gas in the approved ratio to provide a high temperature flame. In oxyacetylene welding, oxygen and acetylene gas are combined in a torch handle to produce a flame that burns at over 6000 degrees fahrenheit. In addition, oxy fuel cutting is still widely used, both in heavy industry and light industrial and repair operations. The pressure amount of gas in an oxygen cylinder is 1980 lbin. Fundamentals of gas cutting and welding ced engineering. Oxyacetylene oa welding is one of the many types of welding supported by the prl. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting.
Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. The spark lighter is used to ignite the oxyacetylene mixture at the tip of cutting torch. Gas welding it is a non pressure or fusion welding technique. Oxygenacetylene welding, or gas welding, is a process which relies on. Always close the cylinder valve and replace protective cover before moving the. Mostly oxy acetylene gas is used for all general purpose of welding. Ppt oxyacetylene welding powerpoint presentation free. The oxyacetylene torch can be used for various tasks. In this welding the welder should wear all protective clothing and helmet.
Commonly used gases are acetylene, natural gas and hydrogen in combination with oxygen. Nov 18, 20 oxyacetylene welding also known as oxyacetylene welding uses an oxyfuel gas flame can be applied with or without pressure can be applied with or without the use of filler materials 5. The process is also useful for a large amount of repair work. The oxyacetylene torch is a safe tool if used properly. The fuel gas selection is depends on the welding material. Apr 16, 2017 gas cylinder is filled either by oxy acetylene gas, hydrogen gas, natural gas or other flammable gas.
Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. Normally these cylinders have maroon line to indicate it. The chemical action of the oxyacetylene flame can be adjusted. Both require a gasfueled torch to raise the temperature of two similar pieces of metal to the fusion point that allows them to flow together. Oxidation of the joint faces is prevented by an envelope made. Oxyacetylene gas welding is commonly used to permanently join mild steel. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Typical applications of the process include fabrication of ventilation and airconditioning ducts and repair of vehicles. In this video we will discuss about what is oxygen acetylene welding. Following table shows the useful fuel gases for gas welding with their calorific values and temperatures. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Oxyacetylene welding it is the common method of gas welding. Thereby the gas welding may be known as oxyacetylene welding oaw.
The fuel gas commonly acetylene, when mixed with proper proportion of oxygen in a mixing chamber of welding torch, produces a very hot flame of about 57005800f. Oxyfuel welding, heating and cutting concoa gas pressure. Do not extinguish, unless leak can be stopped safely. Other fuel gases, such as propane, propylene or natural gas, produce insufficient heat input for welding but are used for cutting, torch brazing and soldering. Proper eye protection must be wornoperate only with instructors permission and after proper instructions have been received. In fact, the oxyacetylene flame burns at 6000 f, and is the only gas flame that is hot enough to melt all commercial metals. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Torches types of torch welding torch cutting torch rosebud torch used. The popular gas combinations are oxy hydrogen mixture, oxygen acetylene, etc.
Fundamentals of gas cutting and welding cedengineering. One of the most commonly used applications of acetylene gas is oxyacetylene welding, oxy welding, or gas welding. Safety for oxyacetylene welding thompson rivers university. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. The oxy acetylene welding process combines oxygen and acetylene gas to provide a high temperature flame for welding.
A master log will be maintained by the chairperson for the welding department. Nov 17, 2016 an introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the united states and oxyfuel cutting are processes that use fuel gases or liquid fuels such as gasoline and oxygen to weld or cut metals. Oxygen acetylene welding easily understand youtube. The oxy acetylene and other oxy fuel gas mixtures welding torch remains a mainstay heat source for manual brazing and braze welding, as well as metal forming, preparation, and localized heat treating. Oxyacetylene welding is simple in concept two pieces of metal are brought together, and the touching edges are melted. Oxyacetylene welding is simple in concept two pieces of metal are brought together, and the touching edges are melted by the flame with or without the addition of filler rod.
Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Aug 02, 2018 oxy acetylene welding it is the common method of gas welding. A complete, practical manual for gas welding and cutting practice ted b. Oxy acetylene welding ofw fundamentals pressure settings.
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