Check oxyfuel system for leaks with an approved leak detection solution or leak detector. Does anyone have any suggestions on cutting sheet steel. Oxyacetylene cutting is used in many metal fabrication shops. Oxyacetylene cutting incidents incident during the past few months there has been an increasing number of incidents involving the use of oxyacetylene equipment, resulting in serious injury and damage to equipment. To secure a neutral flame, always start with an excess of acetylene, then increase the flow of oxygen or decrease the flow of acetylene until the acetylene feather disappears from the center cone. For a typical oxygas cutting outfit, also referred to as a cutting rig figure 41, you need. Circumstances a number of incidents have occurred when operators using oxyacetylene equipment sustained serious. Cutting with the oxy fuel process is just the opposite from of welding. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c.
Safety with oxyacetylene welding or cutting irish oxygen. Oxy acetylene cutting incidents incident during the past few months there has been an increasing number of incidents involving the use of oxy acetylene equipment, resulting in serious injury and damage to equipment. Flame cutting is used to make the edges of the work pieces and for sheet cutting films of metal from 1 to 12 millimeters thin, pipes, steel bars, and other ferrous. When the required temperature is reached, the cutting oxygen is turned on, and the stream of pure oxygen is directed against the heated metal. Now open both cylinders valves no specific order but only open the acetylene tank about a 12 turn, the oxygen should be opened all the way. This course content is in the following pdf document. Setting dwell in oxyfuel cutting is a bit more complicated than in plasma cutting, but is easily accomplished. Kinetics of oxyfuel gas cutting of steels article pdf available in journal of the brazilian society of mechanical sciences and engineering 332. I am using the large victor torch handle with an 0 tip and i have tried adjusting gas to around 3psi and oxy to as little as 20 psi.
Introduction to gas welding and cutting a pdh online. Oxyfuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications. 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. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene.
Oxyacetylene cutting process questions answer the following questions. Harbor freight oxygen and acetylene welding and cutting torch just as good as my victor torch duration. Normal air contains 21% of oxygen and the way in which common materials burn in it is well known. The oxyacetylene torch is a safe tool if used properly. Cutting with the oxyfuel process is just the opposite from of welding. The illustrations below show how to configure your setup file for this. Gas welding is a method of joining similar metals by heating the adjacent surfaces to the melting point with an oxyacetylene flame, and allowing the two parts to fuse together, with a filler metal being required on materials 5mm thick or more. The oxyacetylene equipment presented in this catalogue must be used. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene.
Pdf version 30 kb fires and explosions due to the misuse of oxygen. 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. In oxyfuel cutting, the metal is first preheated with the oxy fuel flame to the ignition temperature. Circumstances a number of incidents have occurred when operators using oxy acetylene equipment sustained serious. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. An oxy acetylene torch is an affordable and versatile tool used by many people to heat, weld, solder, and cut metal. Oxy fuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure oxygen to burn away the preheated metal. First close the acetylene knob all the way until the flame is extinguished. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Oxyacetylene cutting safety occupational safety and.
Fundamentals of gas cutting and welding ced engineering. Giving an overview of the gas or oxy acetylene welding processes. In the proposed work experiments were conducted to determine the appropriate settings of cutting parameters, nozzle size, acetylene pressure. Designed for welding with oxyacetylene, it is conveniently adaptable to other fuels and accessories. 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. The first maritime deliveries from this period were supply of acetylene as fuel gas for the guiding light beams from numerous lighthouses along the long and weatherbeaten coast of norway. For use in welding and cutting, the working pressures must be controlled by a regulator, since above 15 psi 100 kpa, if subjected to a shockwave caused, for example, by a flashback, acetylene decomposes explosively into hydrogen and carbon. The chemical action of the oxyacetylene flame can be adjusted. The chart ranges from 14 material thickness to oxy cutting up to 2 steel. A guide to plasma cutting, oxyacetylene, arc, mig and tig welding.
How to set up an oxy acetylene torch with pictures wikihow. If you suspect the presence of a gas, contact your supervisor to have it checked out before proceeding with any work. Oxyacetylene welding andor cutting produces intense heat, and special precautions need to be taken to prevent deadly fires and explosions. In concentrations higher than 21%, however, the situation is different. Preheat flames are used to raise the surface or edge of the steel to approximately 1800f bright red color. Oxyacetylene cutting safety in agriculture osha standard 1910. It is acceptable to use acetylene regulators that indicate a static pressure up to 22 psi 151 kpa. This chart provides the approximate cost for cutting metal plate with oxyfuel torches on a cnc cutting machine. It uses extreme heat to function, and setting it up properly is one of the most important steps in using it safely.
An excess of acetylene is easy to spot, but an excess of oxygen is difficult to spot except that it will cause molten metal to spark excessively. Others want to carry documents around with them on their mobile phones and read while they are on the move. Torch features silverbrazed, twintube construction for safety and durability. 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 oxygen to weld or cut metals. Oxy acetylene welding andor cutting produces intense heat, and special precautions need to be taken to prevent deadly fires and explosions. Instruction manual welding, brazing, heating, cutting. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. After watching this video, i now know more about oxy acetylene cutting than i thought i didnt know.
Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. The oxyacetylene torch can be used for various tasks. For only cutting and heating propane will do the job and its safer than acetylene too. Many people prefer to read offline or to print out text and read from the real printed page. In addition, oxy fuel cutting is still widely used, both in heavy industry and light industrial and repair operations. Just a very general outline about welding processes,especially off was his recommendation that the reader learn to oxyacetlene weld first as a primer to doing any other types of welding.
Open the acetylene needle valve on the torch and which is blown or washed out of the kerf by the force allow gas in the hose to escape for 5 to 15 seconds. Gas welding is a method of joining similar metals by heating the adjacent surfaces to the melting point with an oxy acetylene flame, and allowing the two parts to fuse together, with a filler metal being required on materials 5mm thick or more. Oxyacetylene cutting can be used to cut thicknesses from 28. Aug 30, 2019 an oxy acetylene torch is an affordable and versatile tool used by many people to heat, weld, solder, and cut metal. Oxyfuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. Because this is achieved by oxidation, it is only effective. Mediumduty oxyacetylene cutting and welding outfit 770 502. Use the following internet link to find the answers. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. As a teenager in the 50s i burned cars apart in a wrecking yard with oxypropane, it works very well. For welding the mild steel, open oxygen torch valve and adjust to neutral flame. Following the inspection and installation of the regulators and hoses, the checklist is divided into two sections. This chart provides the approximate cost for cutting metal plate with oxy fuel torches on a cnc cutting machine.
Gas welding experiment gas welding i objectives giving an. A guide to plasma cutting, oxyacetylene, arc, mig and tig welding, revised and updated finch, richard on. Gas welding experiment gas welding i objectives giving. The focus changed towards gas and arc welding techniques when these were developed to useful. Check oxy fuel system for leaks with an approved leak detection solution or leak detector. Follow the precautions in this safety section and those throughout this manual for your personal safety and the safety of people near the equipment. In modern steelage the steelmakers cut iron and steel by oxyacetylene, oxyhydrogen, oxy propane, oxynatural gas cutting blowpipes easily, speedily, and cleanly.
Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Oxyacetylene torches have an attachment for cutting, which can be attached to the welding torch. It is the only gas mixture hot enough to melt steel. It can be used for cutting steel, welding steel, brazing and for heating metal. Oxygasoline is primarily used for cutting heavy stuff. Introduction to gas welding and cutting a pdh online course. Our oldest son and i got this to learn about using an oxyacetylene torch as it was something we both wanted to learn. Safe operating procedures sop 15 oxy acetylene cutting. It is necessary for there to be two dwells one for preheat, and another for the torch to fully penetrate the material before starting to move.
How to operate an oxyacetylene cutting torch snapguide. Our oldest son and i got this to learn about using an oxy acetylene torch as it was something we both wanted to learn. The oxy acetylene and other oxy fuel gas mixtures welding torch remains a mainstay heat source for manual brazing and braze welding, as well as metal forming, preparation, and localized heat treating. 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. If the oxy welding cutting equipment is to be operated in a dangerous or hostile environment, the userclient. Oxyfuel setup and troubleshooting plate and pipe cutting. There were no concerns about the fuel detonating if mishandled either. Designed for welding, heating and cutting with oxyacetylene. In planning the job, have the tanks firmly secured to prevent tipping over, the hose should be behind you so as to protect it from damage due to flying sparks.
Download oxyacetylene welding and cutting pdf file size. Wear proper clothing and personal protective equipment ppe. Use only acetylene or propane gas and oxygen with this equipment. After watching this video, i now know more about oxyacetylene cutting than i thought i didnt know. If this is not possible, tightly cover them with ap. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. Oxyfuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure oxygen to burn away the preheated metal. February 2015 issue 2 pg 2 of 2 the instructions recommended within this document apply to normal risk conditions.