The oxyacetylene torch can be used for various tasks. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Apr 16, 2017 today we will learn about gas welding principle, working, equipments, types, application, advantages and disadvantages. Normally these cylinders have maroon line to indicate it. Video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel. Pdf file click here for printable worksheet video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel.
The most important oxyfuel gas welding process is oxyacetylene welding. The chemical action of the oxyacetylene flame can be adjusted. The flux may be used to deoxidize and cleanse the weld metal. Student workbooks hobart institute of welding technology. One of the most commonly used applications of acetylene gas is oxyacetylene welding, oxy welding, or gas welding. In fact, the oxyacetylene flame burns at 6000 f, and is the only gas flame that is hot enough to melt all commercial metals. Mostly oxy acetylene gas is used for all general purpose of welding. Propane is also commonly used in welding and is a flammable material. Aluminum oxyacetylene welding flux gas welding equipment. For all employees, instructors and students who will be working with oxyacetylene welding equipment and 3. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. 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.
What is the difference between gas welding and braze welding. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 d. Apr 18, 2016 today i am going to tell you about difference between arc welding and gas welding. Fundamentals of welding, unit 2, assignment sheet 1complete the student safety pledge form occupation. Other articles where oxyacetylene welding is discussed. Due to flammable liquids, gases or combustible dusts. Wear flame resistant clothing when gas welding or cutting. Gas welding this chapter discusses equipment and materials used in gas welding. Information is provided on the operation and maintenance of oxyacetylene and oxy mapp equipment. Oxyacetylene is one of the oldest and most universally used welding processes. Oxy acetylene, equipment,types of flames,applications by mohammed shafi november 7, 2018 march 21, 2020.
Fusion welding in fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Weld using gas metal arc welding process, department. It is an unstable gas, will violently decompose when in a pure. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal. In most shops, acetylene gas is combined with oxygen to produce the torch flame. To provide safety guidance in the use in performing oxyacetylene welding. The oxyacetylene process it is the only gas mixture hot enough to melt steel. Download it once and read it on your kindle device, pc, phones or tablets.
Oxyfuel welding, heating and cutting concoa gas pressure. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. Compressed gas cylinders used in the welding work can cause different hazards due to their high pressures and contents. Oxyfuel gas is also commonly used in cutting torches to cut and separate metal plates and other parts. An example of acetylene gas, which is used in oxyacetylene welding, is a combustible gas and could cause explosion and fire 37. Oxy acetylene welding ofw fundamentals pressure settings. Today i am going to tell you about difference between arc welding and gas welding. Gas cylinder is filled either by oxy acetylene gas, hydrogen gas, natural gas or other flammable gas. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. Apr 03, 2017 lets talk about the lost art of gas welding.
It can be used for cutting steel, welding steel, brazing and for heating metal. Oxyacetylene welding acetylene gas plant, acetylene. If fuel gas were to leak from the unit, smoking could provide ignition and cause a fire or an explosion. Light the gas by means of a suitable sparklighter making sure that the sparklighter is held at right angles to the nozzle. The combustion to take in two stage of oxyacetylene welding process. These joining processes are used in joining same or different metal by application of heat. Student workbooks archives hobart institute of welding. The flux melts, solidify and forms a slag on the resultant weld bead. 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. Gas tungsten arc welding stainless steel and titanium quantity.
Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. 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. Then take small glass vial and put there a small amount of the flux, about a grain of black pepper size. The main improvements since then have been in equipment and safety. When department of defense activities procure compressed gases in commercialowned cylinders, it is not mandatory that the cylinders be color coded in accordance with this standard. 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. 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.
In gas welding, fuel gases like acetylene, hydrogen are used to generate heat. These are the two main types of welding used in different joining process. Identify and use the safety practices that should be observed when welding with oxyacetylene gas. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. Fundamentals of gas cutting and welding ced engineering. In modern steelage the steelmakers cut iron and steel by oxyacetylene, oxyhydrogen, oxy propane, oxynatural gas cutting blowpipes easily, speedily, and cleanly. Slag splatter wear welding jacket, apron, gloves, work shoes. However, if it is used incorrectly, serious injury can occur to you and the equipment. First clean the aluminum surface with sandpaper to make sure no other stuff is present.
Oxyfuel oxyacetylene welding a guide to gas welding. 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. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. However, it is still widely used for a variety of applications. Heating tip uses a tremendous amount of oxygenacetylene. The oxyacetylene welding process uses a combination of oxygen and acetylene gas in the approved ratio to provide a high temperature flame. Fundamentals of gas cutting and welding cedengineering. Oxygen and acetylene use and safety ar training updated 2012 dmme division of mineral mining. Sparks wear welding jacket, apron, gloves, work shoes. While a great deal of oxyacetylene welding and cutting is done using gases.
Equipments used for oxyacetylene welding metallurgy. The flame heats the base metal to its fluid or puddle state. Its popular with metal artists and also used for soldering and brazing dissimilar or nonferrous metals. Use features like bookmarks, note taking and highlighting while reading welders handbook. Acetylene produces more heat than other fuels, but some welders use propane. Oxyacetylene welding and oxyfuel cuttingall job sheets require students to clean up their work areas and return tools and equipment to proper storage. Never use matches or a cigarette lighter to ignite the oxyacetylene torch. Gas welding the american welding society defines gas welding as a group of welding processes wherein coalescence is produced by heating with a gas flame or flames, with or without the application of pressure, and with or without the usage of a filler metal.
In this unit you will be introduced to oxy acetylene welding and the safety precautions required when using oxy acetylene equipment. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxy acetylene welding unit 3 manual. Its a shame, because oxy acetylene welding teaches you how to manipulate a. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 degrees centigrade. Oxyacetylene welding gas welding, is a process which relies on combustion of oxygen and acetylene. Oxyacetylene, gas welding rods the oxyfuel process is considered oldschool. Mechanism aws oac caca pac abbreviation s plasma arc cutting air carbon arc cutting oxyacetylene cutting process name. Arc welding, using a consumable electrode, was also introduced in this period, but the bare wires initially used produced brittle. Safety in gas welding, cutting and similar processes. Oaw is one of the easiest forms of welding to learn and the equipment is low cost. For welding the mild steel, open oxygen torch valve and adjust to neutral flame. A guide to plasma cutting, oxyacetylene, arc, mig and tig welding, revised and updated kindle edition by finch, richard. The fuel gas selection is depends on the welding material. Oxyacetylene welding, cutting and brazing quantity.
A guide to plasma cutting, oxyacetylene, arc, mig and tig welding, revised and. 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. What is the difference between gas welding and braze. This module will introduce you to the oxyacetylene welding oaw and cutting process. Guidelines are given on the principal health and safety considerations for oxyacetylene welding to ensure safe welding practices. It is a welding process that melts and joins the metals by heating them with a flame caused by a reaction of fuel gas and oxygen. Information is provided on the operation and maintenance of oxyacetylene and oxymapp equipment. By 1916 the oxyacetylene process was well developed, and the welding techniques employed then are still used. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy.
Welding 5 psi acet5 psi oxy cutting 5 psi acet20 psi oxy. In the arc welding, electricity is used to generate heat. 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. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. In this form may be as inner cone in bluish color and outer brownish color. In plastic welding or pressure welding, the pieces of metal to be joined are heated to plastic state and then forced together by external pressure.
It is an unstable gas, will violently decompose when in a pure state above 15 psi. The flux works ok, but the operating window is tight. Oxyacetylene welding oaw the oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame. Today we will learn about gas welding principle, working, equipments, types, application, advantages and disadvantages. Safety for oxyacetylene welding printed copies of this document are uncontrolled. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting and hard facing. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. The oxyacetylene torch is a safe tool if used properly.
Never light the oxyacetylene torch with a mixed gas adjust flame until 29 c. Difference between arc welding and gas welding mech4study. The oxyfuel gas welding processes employ several types of gases, which is the primary distinction among the members of this group. Oxyacetylene welding oaw oaw is a manual process in which the welder must personally control the the torch movement and filler rod application the term oxyfuel gas welding outfit refers to. Oxygen and acetylene use and safety ar training updated 2012. Oxyfuel oxyacetylene welding a guide to gas welding twi. Flashing close welding curtain to shield outsiders from flashing. Oxyacetylene cutting is also just as easy to learn and provides a means to cut through very thick materials.
Oxyfuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Heats metal via electric arc electrode is made of graphite and coated with copper for strength and conductivity. The most commonly used method is oxyacetylene welding, due to its high flame temperature. In oxyacetylene welding, oxygen and acetylene gas are combined in a torch handle to produce a flame that burns at over 6000 degrees fahrenheit. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy.
Nfpa standard 51, oxygenfuel gas systems for welding and cutting, obtainable sames as item a. Oxyfuel gas cutting and welding operation of oxyfuel torches involves oxygen and flammable gases under pressure, open flames, flying slag and hot metal, meatl fumes and combustion products. This welding generates higher temperature than gas welding. What are the differences between arc and gas welding.
829 92 126 969 1352 594 365 846 754 381 1070 502 1513 44 1364 199 496 1460 557 474 1018 966 1198 1106 1247 412 1219 1475 1230 475 258 1362 1293 284 1169 464 712 602 184 725 783 451 1369 184 384 263 772