This instruction should be read in conjunction with. Oxyacetylene cutting safety in agriculture osha standard 1910. Download oxyacetylene welding and cutting pdf file size. Before cutting, the cutting torch has to preheat the steel to ignition temperature at the starting point.
Gases oxygen, acetylene and liquefied petroleum gas lpg. Oxyfuel 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. 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. By varying the relative amounts of acetylene and oxygen, a welder can produce different flame atmospheres and temperatures as he requires. Oxyacetylene cutting can be used to cut thicknesses from 28. Allow gas in the hose to escape for 5 to 15 seconds. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. This book will highlight the welding and cutting processes. Gce cwt provides a full range of gas pressure regulators, arc welding. Safe operating procedures sop 15 oxy acetylene cutting. Oxygen is supplied for oxyacetylene welding in seamless steel cylinders. Others want to carry documents around with them on their mobile phones and read while they are on the move. Cutting with the oxyfuel process is just the opposite from of welding.
Setup and shutdown procedure for oxy fuel cutting torch. It is an invaluable aid to industry as well as in schools and universities. Open acetylene fuel gas valve on torch handle for 3 to 5 seconds, then shut it off o check both regulator pressures and reset if necessary. 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.
Preheat flames are used to raise the surface or edge of the steel. Gas welding is a method of joining similar metals by heating the adjacent surfaces to the melting point with an oxyacetylene. The combination of oxygen and acetylene produces a flame. A number 4 shade lens is minimum for oxyfuel gas welding and cutting. Oxidizing excess oxygen to acetylene burning ration with on acetylene feather, and makes a harsh, hissing sound least used because it oxidizes metal, but is used for braze welding with a bronze rod neutral x burns equal amounts of oxygen and acetylene, and has a clean, cleanedged inner cone the most used flame for oxyacetylene applications. Like the cutting outfit, the minimum welding outfit consists of the following parts. Then purge the acetylene gas line and check for constant gas flow. This colorless gas is widely used as a fuel and a chemical. Follow the precautions in this safety section and those throughout this manual for your personal safety and the safety of people near the equipment.
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. One of the most commonly used applications of acetylene gas is oxyacetylene welding, oxy welding, or gas welding. The chemical action of the oxy acetylene flame can be adjusted. Acetylene is the hottest and most efficient of all fuel gases making it suitable for a range of applications and requires the least amount of oxygen to ensure complete combustion. It is the only gas mixture hot enough to melt steel. Because this is achieved by oxidation, it is only effective. Oxyfuel gas equipment has many uses welding, cutting, heating, straightening, and descaling. Cutting heating brazing correct pressure setting charts by. This chart provides the approximate cost for cutting metal plate with oxyfuel torches on a cnc cutting machine. Gas welding is still used for side of metal, cut by oxygen propane cutting torch metalbased. It is acceptable to use acetylene regulators that indicate a static pressure up to 22 psi 151 kpa. Features reverse flow check valves straight cutting torches total length 14 355mm barrel length 10 252mm racking length 7 176mm gas acetylene cutting tips series 1 type 101. Giving an overview of the gas or oxyacetylene welding processes.
Wear proper clothing and personal protective equipment ppe. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. Turn the acetylene knob on the cutting torch about a quarter of a turn and light the acetylene. Withdrawal rates from acetylene cylinders are limited to about 17 of the cylinder contents per hour, e. Oxygenfuel gas cutting is a process in which the base metal is heated to its ignition point by a heating flame and then burned by a jet of oxygen. 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. Oxyfuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure oxygen to burn away the preheated metal. Gas welding experiment gas welding i objectives giving. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. Fundamentals of gas cutting and welding ced engineering. Firepower portable oxyacetylene tote outfit 150 series. Oxygen acetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. With a 2hose cutting torch, preheat pressure is set by the cutting oxygen. Use only acetylene or propane gas and oxygen with this equipment.
Introduction to gas welding and cutting a pdh online. Keep torch flame or sparks away from cylinder, regulator, and gas hose. Oxyacetylene welding is a very common welding process. Instruction manual welding, brazing, heating, cutting. The oxyacetylene torch can be used for various tasks. Fundamentals of gas cutting and welding cedengineering. The use of oxygen and acetylene as welding gases dates back to the 1890s. In modern steelage the steelmakers cut iron and steel by oxyacetylene, oxyhydrogen, oxy propane, oxynatural gas cutting. Oxyacetylene welding acetylene gas plant, acetylene. 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. Purge the oxygen gas line and check for constant gas flow. Oxy acetylene welding ofw fundamentals pressure settings. If you light up the tip and the flame is away from the tip, decrease the acetylene pressure and let the flame come back against the tip. Oxyfuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure.
In the proposed work experiments were conducted to determine the appropriate settings of cutting parameters, nozzle size, acetylene pressure, heating oxygen pressure, cutting oxygen pressure and. Oxyacetylene cutting safety occupational safety and. It can be used for cutting steel, welding steel, brazing and for heating metal. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Fusion weldinga welding process that joins metals by heating them to be a. The oxyacetylene handbook is a basic handbook or manual on oxyacetylene welding and cutting and their related processes.
Figure 410 shows the components of a typical oxygen cylinder. Mediumduty oxyacetylene cutting and welding outfit 770 502. Pdf oxyfuel welding and cutting sewalem gezie academia. Cylinder of acetylene or mapp gas cylinder of oxygen two regulators two lengths of hose with fittings torch with.
Upon successful completion of the course, the learner will be proficient in the following key areas. Many people prefer to read offline or to print out text and read from the real printed page. Mechanised oxyfuel cutting of 25mm mild steel with. Safety in gas welding, cutting and similar processes. Oxyfuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. What is the difference between gas welding and gas cutting.
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