Oxy fuel or oxy acetylene welding are gas welding procedures that were invented in the early 1900s. The concepts and skills that are used can be directly related to other process and more complicated process. Before use visual checklist operators should always follow company approved procedures satisfactory report to supervisor if unable to rectify yes no trolley good condition. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. This lesson will take students through the basic concepts, principles, and safety of oxy fuel welding. Chapter 1 from the welding handbook, tenth edition, volume 1, welding science and technology, has been selected by the aws product development committee as a service to indust. Acetylene produces more heat than other fuels, but some welders use propane. Factors affecting quality in oxyfuel cutting operators manual 0558006464 06 2006. Instructors will need to break instruction time apart using the discussion materials attached to all three lessons. Jul 14, 2014 fusion welding uses heat to partially melt the metal surfaces that are to be joined. Industrial technology programs around the country must be sensitive to the demands of manufacturing and industry as they continue to replace vocational curriculum with hightech. Fusion welding uses heat to partially melt the metal surfaces that are to be joined. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Oxyfuel cutting torches use a copper tip with a series of holes arranged in a circle to deliver a mixture of a fuel gas and oxygen to create a preheat flame.
Fundamentals of gas cutting and welding ced engineering. The flame heats the base metal to its fluid or puddle state. By adding oxygen gas, torch outfits can produce flame temperatures of 5,620 degrees. Acetylene produces the hottest flame temperature for oxy fuel cutting and welding the hotter temperature creates a quicker piercing of materials oxy acetylene can be used on sites with no power supply. In this article, you will learn the basics of setting up, using and extinguishing an oxyacetylene cutting torch. 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. Oxyfuel welding ofw is a group of welding processes that join metals by heating them with a fuel gas flame or flares with or without the application of pressure and with or without the use of filler metal. When using an oxygenfuel gas process to perform welding or cutting, the operator.
This is lesson one of three for an introduction to welding course. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting and hard facing. Two of these techniques are used to weld flat joints and one is used for allposition welding. The difference between acetylene vs lpg propane as a. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. Fundamentals of gas cutting and welding cedengineering. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxyacetylene welding unit 3. 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. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. Oxyfuel welding, heating and cutting process manual installation and operation instructions before installing or operating, read and comply with these instructions controls corporation of america 1501 harpers road virginia beach, va 23454 to order call 18002250473 or 7574228330 fax 7574223125 april 2001. 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.
Oxyfuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. This article discusses the process of brazing, torch brazing, how to braze metal and the difference between brazing and soldering. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Kerf width 18 000 2025 for 3hose machine torches only see table. After all its about the quality of the entire fitting contour to reduce fitting and welding time. Traditionally oxyfuel processes are used for brazing, fusion welding, flame hardening, metalizing, soldering.
The oxyfuel process uses oxygen and what other types of gases. 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. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Migmag welding 30 flux cored electrodes 33 tig welding 34 oxyfuel gas cutting 37 plasma cutting 44 safety always 46 conversion data inside back cover air products welders. The other equipments serves the same function as in case of oxyacetylene gas welding. So, if youre looking at a job where you need to weld aluminum, oxy acetylene will be what you want to go with. The oxyfuel system is an auxiliary technique to welding developed since 1903. Before use visual checklist operators should always follow company approved procedures satisfactory report to supervisor if unable to rectify. Which type of hose is used for used for acetylene fuel gases. The purpose of this page is to introduce the beginning welder to the equipment used in the oxyacetylene welding process. Oxy fuel cutting cannot cut nonferrous metals such as aluminum, stainless, brass or copper. The impact of teaching oxyfuel welding on gas metal arc.
Brazing is much like soldering because there is a flux that is distributed on securely fixed metal pieces which are brazed to until the filler melts and gets drawn into the joint. Use the diagram provided to compare and contrast what is similar, and what is different the oxy acetylene welding, and oxy fuel cutting processes. At this temperature of around 960c depending on type of alloy, the steel has lost protective properties against oxygen and is still solid. 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. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. At this point, the gas welding rod copper coated steel is dipped into the puddle. Before cutting, the cutting torch has to preheat the steel to ignition temperature at the starting point. The difference between acetylene vs lpg propane as a cutting or heating fuel gas. Air products welders handbook fusion welding the most widely used welding processes rely on. Flame cutting is used to make the edges of the work pieces and for sheet cutting. Oxyacetylene welding is the most commonly used gas welding technique. The impact of teaching oxyfuel welding on gas metal arc welding skills the journal of technology studies. What is the most common gas used for oxyfuel welding.
Once you are familiar with the equipment and procedures, you should be able to make. Victor tip charts acetylene cutting tip chart cutting tip series 1101 and 3101 metal thickness tip size. Ten years ago the oxyacetylene method of welding and cut ting metals was hardly more than a laboratory process, but in the course of these few years it has. Cutting with the oxyfuel process is just the opposite from of welding. Once you learn the basics of gas welding, you will find the. Oxyacetylene welding uses a mixture of acetylene gas and oxygen gas to feed the welding torch.
Solidstate bonding uses pressure as well as heat to bond metal and other. In most shops, acetylene gas is combined with oxygen to produce the torch flame. Oxy fuel welding includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. The torch body we use for welding is a standard torch body. This will be done starting with the cylinders and ending with the torch tip. What is solidus and liquidus and why is it important to brazing. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxy acetylene welding unit 3. Wall, oxyfuel combustion technology for coalfired power generation, progress in energy and combustion science, 31, 283307, 2005 with a focus on a retrofit, that is, a comparison between air and oxyfuel firing using literature and some of our own research. The chemical action of the oxyacetylene flame can be adjusted. Use the diagram provided to compare and contrast what is similar, and what is different the oxyacetylene welding, and oxyfuel cutting processes. Tig welding 10 plasma welding 17 welding sheet 18 welding plate 20 welding pipes 22 defects in welds 24 the right gas. The spark lighter is used to ignite the oxyacetylene mixture at the tip of cutting torch. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Background the use of gas welding dates back to the middle 1800s where a mixture of oxygen and hydrogen were used.
Practice fire prevention techniques whenever oxyfuel operations are in. Oxygenacetylene welding, or gas welding, is a process which relies on. The same type of oxyfuel welding apparatus is used in all cases, but the torch welding tip size could be changed depending on the amount of btu heat output. 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. Oxyfuel welding basics, principles, and safety by justin pickard. 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. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Oxy acetylene welding ofw fundamentals pressure settings. Oxyfuel welding basics, principles, and safety cte online. To attain a similar adiabatic flame temperature the o2 proportion of the gases passing through the burner is higher, typically 30%, higher than that for air of 21%. How to operate an oxyacetylene cutting torch i am a welderfabricator by trade. Torch outfits produce heat energy by burning acetylene gas. The oxy fuel cutting process is capable of cutting steel whose composition is less than.
Oxy fuel welding is a critical process in welding instruction. Its popular with metal artists and also used for soldering and brazing dissimilar or nonferrous metals. 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 nozzle flow data metal thickness tip size drill size oxygen pressure psig acetylene. The basics before cutting, the cutting torch has to preheat the steel to ignition temperature at the starting point. Part 1 1991 glossary for welding, brazing, and thermal cutting. How to operate an oxy acetylene cutting torch i am a welderfabricator by trade. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. However, unlike these, oxy acetylene, or arc welding, is much more widely used since it is relatively inexpensive and has equipment that is typically much more portable than tig or mig welding plants.
For detailed information about how to achieve better cut quality with oxyfuel cutting, download the free pdf file below. As presented in the introduction to welding chapter, mapp c 3 h 4 methylacetylenepropadiene is an allpurpose industrial fuel with the highflame temperature of acetylene and the handling characteristics of propane. In this unit you will be introduced to oxyacetylene welding and the safety precautions required when using oxyacetylene equipment. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. There are many variations of the arc welding process.
May 1 what is the difference between gas welding and braze welding. In this unit you will be introduced to oxy acetylene welding and the safety precautions required when using oxy acetylene equipment. Further information can be obtained in the welding institute technical note 7 safety in welding and cutting. Mapp is sold by the pound as a liquid instead of by the cubic foot, as with acetylene. Oxyfuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications. However, it is still widely used for a variety of applications. In this article, you will learn the basics of setting up, using and extinguishing an oxy acetylene cutting torch. Oxyacetylene, gas welding rods the oxyfuel process is considered oldschool. There are three main techniques used in oxyfuel welding. April 3 with a single stage regulator the delivery pressure rises as inlet pressure decreases why. However, unlike these, oxyacetylene, or arc welding, is much more widely used since it is relatively inexpensive and has equipment that is typically much more portable than tig or mig welding plants. Common fusion welding processes arc welding oxyfuel welding electric resistance welding laser beam welding electron beam welding thermite welding 7.
Torch outfit basics for beginners oxygenacetylene welding. Esabs experience with oxyfuel cutting dates back to 1907. Other welding processes that produce fusion of the metals joined. This operating manual has been designed to instruct you on the. The temperature of a neutral oxyacetylene flame is approximately. Heating tip uses a tremendous amount of oxygenacetylene.
And this welding process is still very popular today, mainly because it does not require much equipment, and does not require power. So, if youre looking at a job where you need to weld aluminum, oxyacetylene will be what you want to go with. Preheat flames are used to raise the surface or edge of the steel to approximately 1800f bright red color. When oxyfuel welding, gases are mixed in following before exiting the torch. Feb 15, 2019 intro to oxyacetylene welding part 2 duration. This gas mixture also provides the highest flame temperature of available fuel gases, however acetylene is generally the most expensive of all fuel gases. The use of oxyfuel equipment is a necessity for teacher. Gas welding and cutting oxy fuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. Oxyfuel welding, heating and cutting process manual installation and operation instructions before installing or operating, read and comply with these instructions controls corporation of america 1501 harpers road virginia beach, va 23454 to order call 18002250473 or 7574228330 fax 7574223125 april 2001 supersedes. Oxyfuel oxyacetylene welding a guide to gas welding twi. Experience gained from user contact and welding training of crewmembers showed that. Mild steel is comprised of 98% iron, 1% manganese, carbon up to.