Manual oxyflame cutting of a round hole or disc can be made easier using a. The oxyacetylene and other oxyfuel gas mixtures welding torch remains a mainstay heat source for manual brazing and braze welding, as. This equipment can be used to flame harden and temper work pieces of varying sizes and for the cutting. In this modern steelage welding scienceboth arc and gas weldingare developing side by side. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to.
When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. When checking the acetylene, it is best to do it quick so. Oxy fuel cutting can be very intimidating to students and inexperienced welders. By the end of this unit each apprentice will be able to. Adjust acetylene to bring flame back down to almost touching the tip. The theory of oxyacetylene equipment global engineer harry. Mediumduty oxy acetylene cutting and welding outfit 770 502. In this article we will discuss about the principle of gas welding. What operations can oxy acetylene equipment perform. Dissolute acetylene cylinder lpgas cylinder gas oxyfuelcutting gas welding. Plasma arc cutting pac plasma cutting plasma arc welding paw plasma welding carbon arc cutting cac arc gouging, airarcing oxy acetylene welding or cutting torch welding or cutting, gas welding or cutting shielded metal arc welding smaw also known as stick welding is an arc welding. Cutting air carbon arc cutting oxyacetylene cutting process name.
Experience gained from user contact and welding training of crewmembers showed that. It can be used for cutting steel, welding steel, brazing and for heating metal. Follow the precautions in this safety section and those throughout this manual for your personal safety and the safety of people near the equipment. When opening tank valves, always open valves slowly so pressure on regulators is. Oxy fuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications. In this article, you will learn the basics of setting up, using and extinguishing an oxy acetylene cutting torch. A guide to plasma cutting, oxyacetylene, arc, mig and tig welding, revised and updated kindle edition by finch, richard. Welding, or gas welding, and oxy fuel cutting applications tools, equipment, or machinery used when performing task. Oxygen acetylene cutting definition is gas cutting with oxygen and acetylene. These nozzles are designed for use with the boc cutting attachment, the universal cutting torch and the lt torch. 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. 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. Unit ii oxygas and other cutting welding processes.
Oxygenacetylene cutting definition of oxygenacetylene. Oxygen acetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Chapter 8 oxyacetylene facts do not cease to exist because they are ignored. The oxy acetylene torch can be used for various tasks. Aldus huxley introduction one of the earliest welding processes, oxyacetylene welding was first used industrially in the early years of the twentieth century. Feb 23, 2012 oxy acetylene welding has been in use since the turn of the 20th century, and does not require electrical power, allowing the welding equipment to be used in a wide variety of environments. Because this is achieved by oxidation, it is only effective. The impact of teaching oxyfuel welding on gas metal arc. Theory 120 hrs including selflearning with a digital module on gmaw basic level. Oxyacetylene torcheshow to use use of a cutting torch is not something that just anybody should do without training. Turn the acetylene knob on the cutting torch about a quarter of a turn and light the acetylene. If the oxy welding cutting equipment is to be operated in a dangerous or hostile environment, the userclient. Pdf oxyacetylene welding krishna chaitanya academia. Oxy acetylene welding ofw fundamentals pressure settings.
Fundamentals of gas cutting and welding cedengineering. The purpose of the welding handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. This video will give you an indepth lesson on how to setup and break down your rig. Gas welding and flame cutting are indispensable today.
Flame cutting is used to make the edges of the work pieces and for sheet cutting films of metal from. The oxy fuel cutting process is capable of cutting steel whose composition is less than. There are advantages for the oxyacetylene welding processes, especially in light gauge sheet metal work and oxycutting in heavy section. The impact of teaching oxy fuel welding on gas metal arc welding skills the journal of technology studies. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting and hard facing. Unit 1 oxyacetylene welding introduction duration 7 hours learning outcome. However, if it is used incorrectly, serious injury can occur to you and the equipment. Block vi general precautions in welding and cutting the student must be able to. Flexible hoses are used to connect the regulators to the torch or blowpipe. Pure nickel is grayishwhite, malleable, ductile and. Identify and safely assemble regulators, hoses, torch and cylinders identify and understand the function of the component parts of the welding torch. Introduction and of restricted size and shape, the oxyacetylene process. It is an invaluable aid to industry as well as in schools and universities. The use of ppe is a good safe practice and may be required by regulatory agencies.
An investigation of oxyacetylene welding and cutting blowpipes with. Fundamentals of gas cutting and welding ced engineering. Oxyfuel cutting is a chemical reaction between pure oxygen and steel to form. After all its about the quality of the entire fitting contour to reduce fitting and welding time. Cutting method that melts and remove iron by the oxidation reaction heat of the iron itself. Oxy fuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide. Oxy acetylene welding or cutting torch welding or cutting, gas welding or cutting shielded metal arc welding smaw also known as stick welding is an arc welding process which produces coalescence by heating with an electric arc between a covered. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. What operations can oxyacetylene equipment perform.
It is the only gas mixture hot enough to melt steel. The chemical action of the oxy acetylene flame can be adjusted. Oct 31, 2017 gas cutting basics of gas welding basics of gas cutting types of flames in gas welding gas welding flames neutral flame carburising flame oxidising flame equipments used in gas welding gas. The chemical action of the oxyacetylene flame can be adjusted. In case of a beveled cut an angled cut for weld preparation the cutting torch will be at an angle and the heat transfer to. 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. Syllabus introduction to oxyfuel welding and cutting. Storage area means where more than 1 bottle of each are stored. Gas welding is also named as oxyfuel gas welding ofw. 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.
Employees have said that it takes too long doing it this way, but this is the only. 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. How to operate an oxy acetylene cutting torch i am a welderfabricator by trade. Setup and shutdown procedure for oxy fuel cutting torch. Describe the applications of oxy acetylene welding in the pipefitting trade and the type of materials that are suitable for joining using this process. Oxy acetylene equipment is portable and easy to use. Dissolute acetylene cylinder lpgas cylinder gas oxy fuel cutting gas weldinggas types. Oxy fuel cutting torches use a copper tip with a series of holes arranged in a circle to deliver a mixture of a fuel gas and oxygen to create a preheat flame. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. Oxy acetylene, equipment,types of flames,applications by mohammed shafi november 7, 2018 march 21, 2020 gas welding process pdf. 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.
Theory of oxy fuel gas cutting oxy fuel gas cutting is functional for use with low carbon and low alloy steels, with a carbon content generally restricted to 110 to 310 of 1%. As the electrode movement is manually controlled hence it is termed as manual metal arc. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. Oxyacetylene welding is one type of welding process used in metal fabrication. 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.
Apr 16, 2017 gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. The shortest distance through the material is a cut perpendicular to the wall. 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. Every effort has been extended in the preparation of this book to make it a textbook on the manual application of the oxy acetylene processes that. The various alloy elements found in steel affect the ability of the oxygen to cut the metal. Nickel is important in mechanics because of its combinations with other metals as alloys. Oxygen acetylene welding easily understand youtube. Guidelines for matching plasma processes with applications are presented. Jan 14, 2017 in this video we will discuss about what is oxygen acetylene welding. Download it once and read it on your kindle device, pc, phones or tablets. Write a list of general precautions used in welding and. Persons can strike an object, or be struck by a moving or flyingfalling.
Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Oxy fuel cutting is a reliable, accurate and competitive cutting technique used for the cutting of mild steel. Oxy fuel cutting cannot cut nonferrous metals such as aluminum, stainless, brass or copper. The cylinders should be fitted with regulators, to control the pressure and flow of gases. Oxygas and other cuttingwelding processes unit objective. February 2015 issue 2 pg 2 of 2 the instructions recommended within this document apply to normal risk conditions. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal heating for bending and forming and oxyfuel cutting. Given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. The first 4steps below will talk about putting a new tank on your oxyacetylene set and starting with step 5, how to use a cutting torch set. 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. Check if exposure recommends or requires a style of ppe. Mild steel is comprised of 98% iron, 1% manganese, carbon up to. The oxy acetylene torch is a safe tool if used properly.
This program will enable them to become welders for employment in auto shops and general fabrication shops. Traditionally oxyfuel processes are used for brazing, fusion welding, flame hardening, metalizing. 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. Description plate mm da kpa oxy kpa speed mm min da lmin oxy single 20 pack lmin 105520 105420 6ca 15 100 180 450 2 11. Oxy acetylene flame cutting gouging principles of flame cutting equipment setup, lightup and shutdown procedures acetylene and oxygen linepressure adjustment for cutting cutting tip types, sizes and selection. Oxy acetylene welding has been in use since the turn of the 20th century, and does not require electrical power, allowing the welding equipment to be used in a wide variety of environments. Oxy fuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure oxygen to burn away the preheated metal. Oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals.
In recent times, many shops are now considering cnc plasma cutting in place of oxy fuel cutting in this material thickness range. Preventive maintenance procedures and define backfire and backflash and their effects. Accessory accessory processes oxy fuel welding and cutting. Industrial technology programs around the country must be sensitive to the demands of manufacturing and industry as they continue to replace vocational curriculum with hightech. The oxy acetylene handbook is a basic handbook or manual on oxy acetylene welding and cutting and their related processes. During the war period oxyacetylene welding and cutting equip ment became of. The project gutenberg ebook of oxyacetylene welding and cutting. Acetylene pressure oxygen pressure metal tip size thickness victor cutting equipment. Oxyfuel welding and oxyfuel cutting are processes that use fuel gases and oxygen to weld or. An introduction to oxyfuel welding and cutting, including history and future in welding, safety, setup and maintenance of oxyfuel welding and cutting equipment and supplies. Check to make sure acetylene is supplied to the cutting attachment, and to make sure the acetylene is still at the acceptable level. This chart provides the approximate cost for cutting metal plate with oxy fuel torches on a cnc cutting machine. The impact of teaching oxyfuel welding on gas metal arc welding skills the journal of technology studies.
The choice between plasma and oxyfuel cutting processes is analyzed in detail. The fuel gas acetylene cylinder valve should be opened a maximum of 34 of a turn. In this video we will discuss about what is oxygen acetylene welding. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. This document contains general information about the topic discussed herein. Oxyacetylene cutting process questions answer the following questions. Oxyfuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications.
Mediumduty oxyacetylene cutting and welding outfit 770 502. Of course, getting to show off flying sparks while you work is a nice bonus. Use the following internet link to find the answers. This process can be done with or without help of filler material. How to operate an oxyacetylene cutting torch snapguide. Cutting with the oxy fuel process is just the opposite from of welding. 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. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. There are advantages for the oxy acetylene welding processes, especially in light gauge sheet metal work and oxy cutting in heavy section. What functionalities should you take into account when automating this cutting process. Discuss general operating instructions for oxy acetylene welding. In this process, mostly oxy acetylene gas is used as fuel gas. This document is not an application manual and does not contain a complete statement of all factors pertaining to that topic.
A number 4 shade lens is minimum for oxyfuel gas welding and cutting. Cutting of metals by means of flame has many advantages over other methods, specially when the metal is of irregular shape. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. It comprises oxygen and acetylene gases stored under pressure in steel cylinders. For example, osha requires the use of ppe when engineering and administrative controls are not feasible or effective. Theory of oxyfuel gas cutting the harris products group. Oxy acetylene welding oxy acetylene, commonly known as oxy fuel, is one of the. Oxy fuel cutting is a time consuming process, especially cutting thick walled materials. Welding and cutting with oxyacetylene popular mechanics, december 1935 pp. In modern steelage the steelmakers cut iron and steel by oxyacetylene, oxyhydrogen, oxy propane, oxynatural gas cutting blowpipes easily, speedily, and cleanly. This type of welding uses a torch fed by an oxygen and acetylene fuel mixture to heat the metal parts to be welded as well as the. For a typical oxygas cutting outfit, also referred to as a cutting rig figure 41, you need. Oxy acetylene cutting safety in agriculture osha standard 1910. 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.
The oxyfuel process is the most widely applied industrial thermal cutting process because it can cut thicknesses from 0. 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. Open oxygen valve slowly on torch and adjust flame. The chart ranges from 14 material thickness to oxy cutting up to 2 steel. 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. As well, oxy fuel cutting is still popular, and oxy acetylene cutting is used in many metal fabrication shops.