If not, they should be securely fastened with a chain to a workbench, a wall, or a post. Turn the adjusting screw or knob counterclockwise onehalf turn. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Fasten oxygen and acetylene cylinders in an upright position. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing. Careless use of oxyfuel torches has caused many fires.
Ensure both gas bottles are off and the welder secured with bottles stored upright at completion of work. The combination of oxygen and acetylene produces a flame temperature over 6000 degrees fahrenheit making it ideal for. Oxyacetylene or oxygen acetylene welding is a type of welding that relies on the combustion of oxygen and acetylene gases, hence often referred to as gas welding. 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. When mixed together in correct proportions within a handheld torch or blowpipe, a relatively hot flame is. Acetylene produces more heat than other fuels, but some welders use propane. Characteristics of the oxy acetylene welding process include. However, it is still widely used for a variety of applications. Oxyfuel welding ofw is also known as gas welding or oxyfuel gas welding. Safety in gas welding, cutting and similar processes. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to.
Oxy acetylene welding leaving certificate engineering notes. Normally these cylinders have maroon line to indicate it. Other names for gas welding are oxyacetylene welding and oxy welding. Hot gas welding can be used to weld practically any shape or size of component, and the equipment has probably the lowest cost of all the plastic welding techniques. Oxyacetylene welding requires a specific skill set and thorough practice, coupled with which it can. For brazing or bronze welding mild steel, open oxygen torch valve and adjust to a slightly oxidizing flame. The company was formed in 2006 with the merger of harris calorific, inc. Fundamentals of gas cutting and welding ced engineering. Oxyfuel oxyacetylene welding a guide to gas welding twi. Thirtyplus years ago, i gas welded everything because thats the setup i could afford, thats how i learned to weld. Safe operating procedure oxy acetylene fuel gas welder. Oxygen acetylene welding, or oxy acetylene welding, is a process for joining metals that was introduced in 1903 by thomas wilson.
The welding torch is opened, both gases are combined together and it is burned due to more oxygen mix to acetylene. Aug 30, 2019 an oxy acetylene torch is an affordable and versatile tool used by many people to heat, weld, solder, and cut metal. Im a welding instructorselfemployed welder and i have a student that signed up for a night course to learn oxyacetylene welding. It offers the advantage of a 5,500f flame temperature with the versatility of a handheld system. This is a welding process that is not used very often because the heat is not as high as the other processes, but is commonly used for welding lead.
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. Increase fuel gas flow until flame leaves end of tip and no smoke is present. Pressure and rod filler metal is used as needed depending on the project. Many professionals use gas welding as the equipment is versatile. An introduction to gas welding oxyacetylene youtube. This is referred to as forehand welding, and is the most commonly used method for lighter tubing and sheet metal. Oxy acetylene welding andor cutting produces intense heat, and special precautions need to be taken to prevent deadly fires and explosions. May 14, 2017 gas welding uses tanks of compressed oxygen and fuelmost commonly acetylenefeeding these gases through hoses to a handheld torch, producing an extremely hot and easytocontrol flame. The gas flow rate is controlled by a pressure adjusting screw which sets the outlet gas pressure.
How to set up an oxy acetylene torch with pictures wikihow. Materials oxygen cylinder, acetylene cylinder, regulator, valves, torch, welding tips, goggles, friction lighter, tip cleaner, personal safety equipment key points and supporting information. The oxyacetylene torch can be used for various tasks. For welding the mild steel, open oxygen torch valve and adjust to neutral flame. 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. 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. Oxyacetylene gas welding is commonly used to permanently join mild steel. Oxyacetylene welding also known as oxyfuel welding ofw, includes any. 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. Most commonly used fuel gas is acetylene and thus the name oxyacetylene welding oaw is also used for this process, when acetylene is used as a fuel gas. Apr 16, 2017 gas cylinder is filled either by oxy acetylene gas, hydrogen gas, natural gas or other flammable gas. Air acetylene welding aaw oxy hydrogen welding ohw pressure gas welding pgw the required heat for welding is generated by a flame caused by the chemical reaction between oxygen and the fuel gas acetylene. In modern steelage the steelmakers cut iron and steel by oxyacetylene, oxyhydrogen, oxy propane, oxynatural gas cutting blowpipes easily, speedily, and cleanly.
It uses extreme heat to function, and setting it up properly is one of the most important steps in using it safely. Oxyacetylene welding is simple in concept two pieces of metal are brought together, and the touching edges are melted. If you suspect the presence of a gas, contact your supervisor to have it checked out before proceeding with any work. Ensure torch tips are cleaned as per manufacturers recommendations. Nov 17, 2016 an introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. The bcga code of practice cp7 recommends the gauges are checked annually and replaced every 5 years. Nov, 2019 apart from oxy acetylene welding, other common variants of oxyfuel gas welding are. The oxy acetylene welding process uses a combination of oxygen and acetylene gas in the approved ratio to provide a high temperature flame. If the torchregulators and gases are done being used for a while, follow these procedures. Oxy acetylene welding ofw fundamentals pressure settings chart set up and kit. Gas welding uses tanks of compressed oxygen and fuelmost commonly acetylenefeeding these gases through hoses to a handheld torch, producing an extremely hot and easytocontrol flame.
Giving an overview of the gas or oxyacetylene welding processes. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. Gas welding experiment gas welding i objectives giving. Hot gas torches are very light and easy to use in awkward positions, and are ideally suited for field repairs where the. Temperatures from the combustion of oxygen o2 gas and ethyne, or acetylene c2h2 gas can reach 3,340 degrees celsius, which is hot enough to cut through steel. Oxy acetylene or oxygen acetylene welding is a type of welding that relies on the combustion of oxygen and acetylene gases, hence often referred to as gas welding. Safe operating procedure oxy acetylene fuel gas welder last modified by. Mostly oxy acetylene gas is used for all general purpose of welding. Mig also is referred to as gmaw gas metal arc welding. 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.
Once the gas welding equipment is connected as per the setup shown in fig. Cylinders should not be able to be knocked or pulled over. The filler rod is kept ahead of the tip in the direction the weld is going and is added to the puddle. C maintained for melt the commercial metal welding. The benefits of acetylene for welding and cutting are well documented. Heating tip uses a tremendous amount of oxygenacetylene. Get the entire oxy acetylene welding dvd here highly recommended here are the common gas welding processes.
Gas cylinder is filled either by oxy acetylene gas, hydrogen gas, natural gas or other flammable gas. An introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. 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. Objective identify and use the safety practices that should be observed when welding with oxyacetylene gas. Oxy acetylene welding ofw fundamentals pressure settings. Oxyacetylene welding is a very common welding process. 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 it is the common method of gas welding. If you have a cylinder cart, place both the oxygen and acetylene cylinders into it. Oxyacetylene welding andor cutting produces intense heat, and special precautions need to be taken to prevent deadly fires and explosions. Oxy acetylene welding requires a specific skill set and thorough practice, coupled with which it can. When mixed together in correct proportions within a handheld torch or blowpipe, a relatively hot flame is produced with a temperature of about 3,200 deg.
Close acetylene torch valve first, then close oxygen torch valve. The oxyacetylene torch is a safe tool if used properly. Its a process where the a combination of pressure and flames are spread across the. The fuel gas selection is depends on the welding material. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Safety in gas welding, cutting and similar processes page 3 of 11 preventing fire from heat, sparks, molten metal or direct contact with flame the flame from an oxyfuel gas torch often called a blowpipe is a very powerful source of ignition. Down of heatingweldingbrazing torch system check each step once completed. Temperatures from the combustion of oxygen o2 gas and ethyne, or acetylene c2h2 gas can reach 3,340 degrees celsius, which is. Oxyacetylene welding acetylene gas plants manufacturer.
However, if it is used incorrectly, serious injury can occur to you and the equipment. It uses dual oxygen and acetylene gases stored under pressure in steel cylinders. Gas welding procedures and techniques flight mechanic. In oxyacetylene welding, the flame produced by the combination of the gases melts the metal faces of the workpieces to be joined, causing them to flow together. Safe operating procedures sop 15 oxy acetylene cutting. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. The regulator has two gauges, a high pressure gauge for the gas in the cylinder and a low pressure gauge for the gas being fed to the torch. In addition, oxy fuel cutting is still widely used, both in heavy industry and light industrial and repair operations. Oxyfuel welding, heating and cutting concoa gas pressure. Oxyfuel oxyacetylene welding a guide to gas welding. Welding can be performed by pointing the torch flame in the direction that the weld is progressing.
The term oxyfuel is used to denote a combination of oxygen and a fuel gas, means its a process in which oxygen and a fuel combustible gas both are required. Developed in 1903, gas welding is used to weld pipes and tubes together while also being an effective way to repair metal. Oxyacetylene gas welding is the most widely recognized sort of gaswelding process. 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. Welding goggles must be worn at all times in work areas. Mapp gas can be used at much higher pressures than acetylene, sometimes up to 40 or 50 psi in highvolume oxyfuel cutting. Its popular with metal artists and also used for soldering and brazing dissimilar or nonferrous metals. The oxy acetylene welding process combines oxygen and. The use of oxygen and acetylene as welding gases dates back to the 1890s. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape.
In oxyacetylene gas welding, a blend of oxygen and acetylene combusts and produces fire at a temperature of around 3500c. The harris products group is a world leader in metal working products used in the brazing, soldering, welding, cutting and gas distribution industries. Oxyacetylene, gas welding rods the oxyfuel process is considered oldschool. Most commonly used fuel gas is acetylene and thus the name oxyacetylene welding oaw is also used for this process, when. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. In handbook of plastics joining second edition, 2009. A filler metal alloy is normally added and sometimes be used to prevent oxidation and to facilitate the metal union. Do not use this equipment unless a teacher has instructed you in its safe use and operation and has given permission. This is a very popular way to gas weld because it produces a lot of heat as a result of acetylene and oxygen combustion, and its relatively easy to regulate. However, operators must observe safety precautions.
The oxyacetylene torch is a popular heat source in the brazing industry. With this family of processes, the base metal and a filler rod are melted using a. In most shops, acetylene gas is combined with oxygen to produce the torch flame. Gas welding experiment gas welding i objectives giving an. Oxyfuel welding and oxyfuel cutting are processes that use fuel gases. In this process the mixture of oxyacetylene and oxygen presented, which is flow to the burning process and controlled by control valve. One of the most commonly used applications of acetylene gas is oxy acetylene welding, oxy welding, or gas welding. Excellent thermal properties make it much more effective at cutting than other fuel gases, offering productivity gains of around 33 percent relative to propane, for instance what is perhaps not so well known is the fact that acetylene because of its high flammability can present a serious safety hazard. The combination of oxygen and acetylene produces a flame temperature over 6000 degrees fahrenheit making it ideal for welding and cutting. Do not use this equipment unless you have been instructed.
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