Safety in gas welding, cutting and similar processes page 5 of 11 fireexplosion caused by gas leaks acetylene, lpg and other fuel gases are highly flammable, and form explosive mixtures with air and. The chemical action of the oxyacetylene flame can be adjusted by changing the ratio of the volume of oxygen to acetylene, using the valves on the torch or. Gas is a fuel gas, because you dont have to use acetylene, although youre nuts if you dont. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Oxy fuel gas cutting and welding operation of oxy fuel torches involves oxygen and flammable gases under pressure, open flames, flying slag and hot metal, meatl fumes and combustion products. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. Hoses are marked t for other gases but package is marked r for acetylene only. French engineers edmond fouche and charles picard became the first to develop oxygen acetylene welding in 1903. Allow gas in the hose to escape for 5 to 15 seconds. The torch is made with thin flimsy metal lever for oxygen cutting and gas.
Using oxy fuel gas cutting equipment sempeo114 using oxy fuel gas cutting equipment 1 overview this standard covers a range of basic competences that you need for cutting and shaping plate 3mm thickness and above, rolled sections, pipe and tube using oxy fuel gas cutting equipment. Fusion weldinga welding process that joins metals by heating them to be a. Welders have 26 fuel gases to choose from, but acetylene, propylene, propane and natural gas are used most frequently for cutting. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Do not perform any hot work electric or gas welding, cutting, and brazing or. Used cars oxy acetylene cutting torchtip,regulator, arrestors, and hoses selling my backup welding rig, worksgreat has 7. Open the valve on the acetylene cylinder no more than threefourths of a turn so it can be closed quickly in case of emergency. Oxy acetylene cutting can be used to cut thicknesses from 28. Site engineer cylinder near the hot work area keep oxy acetylene. Oxy acetylene cutting safety in agriculture osha standard 1910. Oxyfuel gas equipment has many uses welding, cutting, heating, straightening, and descaling. Bulk acetylene can be also used as a raw material in the chemicals processing industry for the production of organic compounds, including acetaldehyde, acetic acid and acetic.
Cutting, weldingbrazing and heating tip flow and pressure. Oxy fuel cutting is a thermal cutting process that uses oxygen and fuel gas such as acetylene, propane, mapp, propylene and natural gas to cut through materials. Cutting with the oxy fuel process is just the opposite from of welding. Oxy acetylene welding torch oxygen and the fuel gas having been reduced in pressure by the gas regulators are fed through suitable hoses to a welding torch which mixes and controls the flow of gases to the welding nozzle or tip where the gas mixture is burnt to produce a flame for carrying out gas. In gas welding and flame cutting, a fuel gas is mixed with oxygen or air in a blowpipe to. Safety in gas welding, cutting and similar processes hse.
The british compressed gases association publish a range of useful documents. Proper care of oxyacetylene cutting and welding equipment imca. The spark lighter is used to ignite the oxyacetylene mixture at the tip of cutting torch. The next step in oxyfuel cutting from the market leaders. When checking the acetylene, it is best to do it quick so that you are not letting the extra gas. The cutting gas protects the lens from cut particles or splashes of molten materials, and blows away molten or evaporated material. Oxy acetylene welding and cutting equipment, online at gas uk. Gap wirea wire used for correct spacing of butt joints. Here at gas uk, we supply a huge range of oxy acetylene welding and cutting equipment to facilitate your welding needs. Share copy and redistribute the material in any medium or format. Fs page 1 job safety analysis safety information for the university of california, berkeley facilities services using an oxy acetylene welder a welding area of a minimum of 35 feet. However, underwater oxy fuel gas cutting of any kind has been replaced by exothermic cutting.
Contents 4 the school of the art institute of chicago 6. Hobart is registered to the iso 9001 quality system standard. This course content is in the following pdf document. Oxyacetylene cutting safety in agriculture osha standard 1910. Setup and shutdown procedure for oxy fuel cutting torch. When you are done clean the cutting tip with the cleaning tool file and tip cleaner. However, before learning about the equipment, you must be familiar with the gases most often used to fuel the cutting equipment. However, if it is used incorrectly, serious injury can occur to you and the equipment. If the oxy welding cutting equipment is to be operated in a dangerous or hostile environment, the userclient is responsible for conducting an appropriate risk analysis and applying suitable controls to. For cutting most metals, an active gas increases the cutting. The oxyacetylene torch is a safe tool if used properly.
Gas welding allows you to cut steel bars, plates, and sheets, but thats not all. The process consists of preheating the metal to be cut to its ignition oxidation temperature, i. These nozzles are designed for use with the boc cutting attachment, the universal cutting torch and the lt torch. Combining these products into one catalog enables you to consolidate all of your welding, cutting. This book will highlight the welding and cutting processes. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting and hard facing.
When this temperature is attained, a jet of high pressure oxygen from a central opening of the. It is the only gas mixture hot enough to melt steel. The preheating is done by oxy acetylene gas flame, which is supplied from surrounding openings of the cutting torch. The fuel gas acetylene cylinder valve should be opened a maximum of 34 of a turn. Keep torch flame or sparks away from cylinder, regulator, and gas hose. Check to make sure acetylene is supplied to the cutting attachment, and to make sure the acetylene is still at the acceptable level. Oxyfuel cutting an oxyfuel gas cutting process used to burn metals by means of the reaction oxygen with the base metal as elevated temperatures. Students will apply principles of oxygas cutting and welding and other processes, such as air carbonarc cutting and plasmaarc cutting, by using the equipment to perform welds and cuts, identifying welding and cutting equipment, and answering questions about related equipment and. Supply system or due to the hot slag resulted from the. Australian standards as 4839 safe use of portable oxy fuel gas.
Fundamentals of gas cutting and welding ced engineering. However, this segment of the market was taken over in the 1980s by plasma and then by laser. Introduction to gas welding and cutting a pdh online. Vintage purox oxy acetylene brass cutting welding torch.
Then purge the acetylene gas line and check for constant gas flow. A member has noted a number of incidents resulting in fires caused by perished hoses and flashbacks involving oxyacetylene cutting equipment, and has shared the following information with imca for use as part of a safety flash. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Oxy acetylene welding ofw fundamentals pressure settings. In the weld shop, we use machines that will cut pipe form 2 inches to 14 inches in diameter.
This instruction should be read in conjunction with. Gas welding cutting kit tool oxy acetylene torch brazing fits victor sturdy. Locate the emergency stop switch for immediate power isolation. For the first time, the turbotorch catalog features an extended offering of genuine victor gas apparatus including outfits, handles, cutting attachments, tips and nozzles. Where a special wrench is required, it should be left in position on the stem of the valve while the cylinder is in use so that the fuel gas acetylene.
Oxy fuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxy fuel cutting. The necessary temperature is maintained by gas flames resulting from the combustion of acetylene with oxygen. Accessory accessory processes oxy fuel welding and cutting. Site engineer cylinder near the hot work area keep oxy acetylene lpg cylinders. Oxyfuel welding an oxyfuel gas welding process that produces fused metals by. Victor dominates as the most demanded product in oxy acetylene gas apparatus. When a lit oxy acetylene torch was brought into contact with the machine body the acetylene gas ignited and an explosion occurred. Fundamentals of gas cutting and welding cedengineering.
The preheat flame is composed of fuel gas and oxygen at a proper mixture ratio to produce maximum flame temperature for greatest heating efficiency. Acetylene uses acetylene is principally used for oxyacetylene cutting, heat treating, and welding. Oxygen acetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. It can be used for cutting steel, welding steel, brazing and for heating metal. Mechanism aws oac caca pac abbreviation s plasma arc cutting air carbon arc cutting oxyacetylene cutting. Handling and storage advice on general occupational hygiene conditions for safe storage, including any incompatibilities eating, drinking and smoking should be prohibited in areas.
If the oxy welding cutting equipment is to be operated in a dangerous or hostile environment, the userclient is responsible for conducting an appropriate risk analysis and applying suitable controls to mitigate those additional risks. The oxyfuel process is the most widely applied industrial thermal cutting process because it can cut. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. 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.
Oxy fuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure oxygen to burn away the preheated metal. The separation is done by heating the surface of the material over melting temperature and burning it through the supply of additional oxygen. This leaflet describes the hazards associated with portable oxyfuel gas. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene.
Unit ii oxygas and other cutting welding processes. The resulting liquid metal slag is blown out by the cutting stream. Mappoxygen was advantageously used in underwater cutting, which requires high gas pressures under such pressures acetylene polymerizes explosively, making it dangerous to use. The oxyfuel process is the most widely applied industrial thermal cutting process because it can cut thicknesses from 0. In modern steelage the steelmakers cut iron and steel by oxy acetylene, oxy hydrogen, oxy propane, oxy natural gas cutting blowpipes easily, speedily, and cleanly. How to set the oxy acetylene regulators tech team products. Cutting, weldingbrazing and heating tip flow and pressure data table 1. Heats metal via electric arc electrode is made of graphite and coated with copper for strength and conductivity. Because this is achieved by oxidation, it is only effective. Mechanism aws oac caca pac abbreviation s plasma arc cutting air carbon arc cutting oxyacetylene cutting process name. This video will give you an indepth lesson on how to setup and break down your rig. Oxyfuel welding, heating and cutting concoa gas pressure. If you need to cut durbar tread plate you may find it easier to maintain the consistency of the cut if you face the ridged side down and cut. The oxy acetylene torch is a safe tool if used properly.
Electric, forge and thermit welding together with related methods and materials used in metal working and the oxygen process for removal of carbon manly, harold p. Preheat acetylene 6 6 7 9 gas consumption scfh tip no. Oxy fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Additionally, acetylene is far and away the most expensive fuel gas. The various fuel gases impact preheating time, cut. The oxy acetylene torch can be used for various tasks. Gce cwt provides a full range of gas pressure regulators, arc welding. Welding is a fundamental skill needed to perform auto repairs, modifications, and other services. Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. It is produced industrially by distilling air below its freezing.
Oxyacetylene oa welding is one of the many types of welding supported by the prl. Oxygas and other cuttingwelding processes unit objective. Oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals. The chemical action of the oxyacetylene flame can be adjusted.
How to cut metal with an oxy acetylene cutting torch. If im going to set this regulator, i want the gas open, because i want to set the pressure while theres actually gas coming out. Jun 05, 20 how to cut plate straight and smooth with the gas axe. Welding, burning, and cutting environmental health and safety. Oxy acetylene welding oxy acetylene, commonly known as oxy fuel, is one of the. Safety in gas welding, cutting and similar processes. Open the acetylene blowpipe handpiece valve very slightly and light with a flint lighter only. Safe operating procedures sop 15 oxy acetylene cutting. Welding gas welder oxygen regulator oxy for torch cutting set cga 540 female. As a welding torch, the basic operation of an oxyacetylene unit is blending two gases, oxygen and.
This chart provides the approximate cost for cutting metal plate with oxy fuel torches on a cnc cutting machine. Description plate mm da kpa oxy kpa speed mm min da lmin oxy. 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. The preheating is done by oxy acetylene gas flame, which is supplied from surrounding openings of the cutting. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. Flashbacks and backfires flashbacks are commonly caused by a reverse flow of oxygen into the fuel gas hose continue reading proper care of oxyacetylene cutting. Generally, hc gases are used as fuel gas in oxy fuel gas cutting. The chart ranges from 14 material thickness to oxy cutting up to 2 steel. Firepower oxy acetylene gas torch handle assemblykit vintage gas welding cutting oxy acetylene torch tools. Use only acetylene or propane gas and oxygen with this equipment.
Mediumduty oxyacetylene cutting and welding outfit 770 502. Hobart medium duty oxyacetylene kit with tip and hose. It is manufactured by the chemical reaction between calcium carbide, a gray stonelike substance, and water. Oxy acetylene cutting is a gas flame cutting process to separate metal sheets.
Oxy fuel cutting an oxy fuel gas cutting process used to burn metals by means of the reaction oxygen with the base metal as elevated temperatures. Medium duty oxy acetylene fuel gas cutting attachment, style cc509, stainless steel tube, brass handle cw5194. 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 commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Check oxy fuel system for leaks with an approved leak detection solution or leak detector. Read our oxy cutting 101 guide to learn how oxygen acetylene cutting machines work. The oxyacetylene torch can be used for various tasks. The other equipments serves the same function as in case of oxyacetylene gas welding. Ceramic bricks, vise grips, pliers, and clamps are available in a file cabinet in the. This range could be expanded if the appropriate cutting tip was used based on the thickness being cut. Oxy fuel cutting can be very intimidating to students and inexperienced welders. Electric shock ensure the cables have proper insulation and connector as well as termination joints are safe for the purpose.
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