Genuine 6inch heating tips melt up to three ounces of gold or silver. Weldingoverview of techniques wikibooks, open books for an. These devices are mainly used in industrial processes where oxy fuel gas mixtures are handled and used. A flashback arrestor or flash arrestor is a gas safety device most commonly used in oxy fuel welding and cutting to stop the flame or reverse flow of gas back up into the equipment or supply line. Ofw includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. 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. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. Air products range of fuel gases for welding and cutting. Explain how to select fuel gas welding equipment and supplies.
Each of the above type of welding can be further classified depending on other micro level characteristics. Always transport hot parts using a pair of pliers or even a cold metal plate as a carrier. Pass a written test on safety and operation procedures on the oxy. Generally, the principal for oxy fuel welding or cutting is the same. Physical mobilitymovement from place to place on the job, considering distance and speed 2. Oxy acetylene, gas welding rods the oxy fuel process is considered oldschool. Welding and brazing guide gases and welding equipment.
These ratios produce highly oxidizing flames, which prevent the satisfactory welding of most metals. Setup and shutdown procedure for oxyfuel cutting torch a handout containing the highlights of the video titled setup and shutdown procedure for oxyfuel welding. A backfire is defined as the momentary recession of the flame into the torch, potentially causing a flashback or sustained. Migmag welding 30 flux cored electrodes 33 tig welding 34 oxy fuel gas cutting 37 plasma cutting 44 safety always 46 conversion data inside back cover air products welders. A filler rod is usually blended into the weld for strength. Although we will discuss some basic safety tips to lessen that potential, nothing can take the place of thoroughly reading your particular equipments operator manual and following all of the safety, operation and maintenance instructions it contains.
However, unlike these, oxy acetylene, or arc welding, is much more widely used since. Applying fuel gas welding fgw processes and techniques. Oxy fuel welding cutting involves combining what of the following. Tig welding 10 plasma welding 17 welding sheet 18 welding plate 20 welding pipes 22 defects in welds 24 the right gas. Fundamentals of gas cutting and welding ced engineering. Oxy acetylene welding is the most common fuel to use, but others can include natural gas, propane, mapp gas, gasoline or any number of hot gases.
Gas welding is a fusion welding process in which the heat for welding is obtained by the combustion of oxygen and fuel gas. Oxyfuel oxyacetylene welding a guide to gas welding twi. After completing this course, participants should be able to describe common oxy fuel gas welding applications and safety concerns associated with the use of oxy fuel gas welding equipment. The gas is generally a mixture of a fuel gas and oxygen to create a clean, hot flame. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. Oxy fuel or oxy acetylene welding are gas welding procedures that were invented in the early 1900s. The lowpressure torch is also known as an injector torch.
Illinois tool works itw purchased the company in 1998. Many beginners want to begin with a particular process but its not always the ideal process to begin the learning process. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. In this process, mostly oxy acetylene gas is used as fuel gas. Of course, getting to show off flying sparks while you work is a nice bonus.
Becareful not to let welding hoses come into contact with torch flame or sparks from cutting. Most commonly used fuel gas is acetylene and thus the name oxy acetylene welding oaw is also used for this process, when acetylene is used as a fuel. 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 oxy fuel gas torch often called a blowpipe is a very powerful source of ignition. Which of the following is not a general safety practice you should follow. An oxy acetylene torch with a welding tip concentrates the heat in a comparatively small area, while an oxy acetylene torch with a multiflame heating tip rosebud applies heat to a larger area. Further information can be obtained in the welding institute technical note 7 safety in welding and cutting. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. In 1916, elmer smith from minneapolis, mn founded smith equipment company to build oxy fuel welding and cutting equipment. Mild steel is comprised of 98% iron, 1% manganese, carbon up to.
When conducting oxy fuel cutting and welding operations, operators can experience backfires or flashbacks. Other names for gas welding are oxyacetylene welding and oxy welding. Oxy fuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. The term oxy fuel 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. Acetylene is the primary fuel for oxy fuel welding and is the fuel of choice for repair work and general cutting and welding, acetylene produces the hottest and most concentrated primary flame of all industrial fuel gases. Check if exposure recommends or requires a style of ppe.
Video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel. Gas welding joins metal using the heat of a torch burning both oxygen and a secondary fuel. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Welding, whether arc welding or oxy fuel, carries with it the potential for serious accidents. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. An oxy fuel torch is a device used in the heating, welding and cutting of steel and other metals. Oxy fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Careless use of oxy fuel torches has caused many fires. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. Using fuel gas and oxygen, the torch heats the metal pieces to the point that they become molten and join together upon cooling. Fusion welding, with or without filler metal, in which the heat for welding is produced by the combustion of a fuel gas or gasses with an admixture of oxygen. Safety for oxyacetylene welding printed copies of this document are uncontrolled.
Choose from rg45 welding rod and flux coated bronze brazing rod. Oxyfuel gas welding ofw is a group of welding processes which join metals by heating with a fuel gas flame with or without the application of pressure and with or without the use of filler metal. Identify safety practices that should be observed in fuel gas welding. In most shops, acetylene gas is combined with oxygen to produce the torch flame. 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. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 d. Acetylene produces more heat than other fuels, but some welders use propane. The most commonly used method is oxyacetylene welding, due to its high flame temperature. Welder and welding operator one who operates electric or gas welding and cutting equipment.
The companys sales continued to grow for many years. Gas welding involves the use of a gasfed flame torch to heat the metal work piece and the filler material to create a weld. Welding and fuel gases what is welding and fuel gasses. Oxy fuel weldingfor almost anyone interested in trying his hand at welding, deciding on which process to start with can be a challenge. The oxy fuel cutting process is capable of cutting steel whose composition is less than. Oxy fuel welding includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. For use with fuel gases acetylene, hydrogen and propylene. Jun 12, 2017 oxy fuel welding is a very traditional type of welding, relying on a torch to weld the metals.
Uses an electric arc between an electrode and the base material to melt the metals at the welding point. Nov 30, 2015 how to master the fiery art of gas welding. Learn welding oxyfuel with free interactive flashcards. Gas flame the molten metal must be protected from the atmosphere absorption of. It protects the user and equipment from damage or explosions. The torch itself can range in size depending on the amount of heat output desired, but in general is about 12 inches long. In this unit you will be introduced to oxy fuel cutting and the safety precautions required when using oxy fuel cutting equipment. A member has reported an incident in which a subcontractors oxygen and acetylene cutting hose burst and caught fire. Mediumduty oxyacetylene cutting and welding outfit 770 502. Hose fire caused by flashback in oxygen and acetylene. See safe welding and cutting with oxy fuel video arc welding processes.
Preheat flames are used to raise the surface or edge of. 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. 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. 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. Safety for oxyacetylene welding thompson rivers university. Reverse flow check valves alone will not stop a flashback in the system. Oxy fuel welding ofw is also known as gas welding or oxy fuel gas welding. Praxairs vast distribution network for welding and fuel gases in north america and our versatile supply system expertise help ensure that your gases are delivered costeffectively. In fusion welding, a heat source melts the metal to form a bridge between the components.
This guide contains important information related to the safe and efficient operation of oxy fuel welding, cutting, and heating apparatus. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Many different gases can be used as fuel for gas welding, and electricity is not needed to power the welding. Equipment safety accessories consumables new products special offers where to buy support. The process may be used with or without the application of pressure and with or without the use of a. 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. The incident occurred when the welder was ready to ignite the cutting torch head. For all employees, instructors and students who will be working with oxyacetylene welding equipment and 3.
Choose from 58 different sets of welding oxyfuel flashcards on quizlet. Welded metal occurs when two pieces are heated to a temperature that produces a shared pool of molten metal. Oxy acetylene torches can be used for a variety of processes, and is one of the many things that can be used to weld aluminum. When you see the symbol, watch out, and follow the related instructions to avoid the hazard. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel. In this unit you will be introduced to oxy acetylene welding and the safety precautions required when using oxy acetylene equipment. Safety in gas welding, cutting and similar processes. Flame temperatures can reach 3,200 degrees celsius. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. Oxy fuel cutting is an excellent solution for construction sites and field repair work because of its low cost and diverse application on metal of varying degrees of thickness. Gas welding is a process of construction that involves the use of gases as well as oxygen to weld metals together. Welding oxyfuel welding a process using fuel gases and oxygen to weld metals. Scope and application oxyfuel gas welding and cutting 14.
To provide safety guidance in the use in performing oxyacetylene welding. 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. This is a good book to learn oxyfuel gas welding, this is a paperback version of the book. The molten pool is generally supplied with additional metal. Supersedes and is equivalent to mem05004c perform routine oxy acetylene welding. And this welding process is still very popular today, mainly because it does not require much equipment, and does not require power. Part 1 1991 glossary for welding, brazing, and thermal cutting. How should welders move hot welded or cut parts manually within the welding shop. Its popular with metal artists and also used for soldering and brazing dissimilar or nonferrous metals. Air products welders handbook fusion welding the most widely used welding processes rely on fusion of the components at the joint line. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. Oxy fuel welding which welding process should i try first. There is no need for filler material or pressure to create the weld. This course is designed to familiarize participants with the basic parts and safe operation of oxy fuel gas welding rigs.
The highest flame temperatures of the gases are obtained at high oxygento fuel gas ratios. Gas welding gas welding is a welding process that melts and joins metals by heating them with a flame caused by a reaction of fuel gas and oxygen. Oxygen is supplied in ratio to the fuel gas, and is then lit by a sparking lighter. Developed in 1903, gas welding is used to weld pipes and tubes together while also being an effective way to repair metal. Other welding techniques that are effective for aluminum include tig tungsten inert gas welding and mig metal inert gas welding. An oxy fuel torch setup consists of the torch itself and associated tubing, regulators, and tanks. Oxy fuel welding an oxy fuel gas welding process that produces fused metals by heating them with a gas flame or flames obtained from the combustion of acetylene with oxygen. Welding done by heating the workpieces with flames obtained from oxyfuel gases is. This unit of competency defines the skills and knowledge required to prepare materials and perform routine oxy fuel gas welding of mildlow carbon steel and cast iron where the welding is not required to meet an australian standard or equivalent. It is, therefore, necessary that proper safety and operating procedures are understood prior to using such apparatus. An intense gas flame is thus produced which melts the.
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