Flame cutting is used to make the edges of the work pieces and for sheet cutting. There are several potential hazards present when using oxyfuel equipment. Acetylene produces more heat than other fuels, but some welders use propane. The joint types and methods of distributing filler metal in the joints differ significantly in the two process.
Its popular with metal artists and also used for soldering and brazing dissimilar or nonferrous metals. Oxyfuel welding, heating and cutting pdf book manual free. Oxy fuel combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. Preheat flames are used to raise the surface or edge of the steel to approximately 1800f bright red color. When conducting oxy fuel cutting and welding operations, operators can experience backfires or flashbacks.
Operation of oxyfuel torches involves oxygen and flammable gases under pressure, open flames, flying slag and hot metal. The chemical action of the oxyacetylene flame can be adjusted. Cutting with the oxyfuel process is just the opposite from of welding. Setup and shutdown procedure for oxy fuel cutting torch a handout containing the highlights of the video titled setup and shutdown procedure for oxy fuel welding. When opening tank valves, always open valves slowly so pressure on regulators is. While not practical for stainless steel or aluminum, oxyfuel cutting is a good process for mild and low alloy steels. 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 most shops, acetylene gas is combined with oxygen to produce the torch flame. Check oxyfuel system for leaks with an approved leak detection solution or leak detector.
The impact of teaching oxyfuel welding on gas metal arc. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. The oxy fuel cutting process is capable of cutting steel whose composition is less than. Oxy fuel welding includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. Learn welding test oxyfuel with free interactive flashcards. Feb 15, 2019 intro to oxyacetylene welding part 2 duration. Oxyfuel welding ofw is a group of welding processes that join metals by heating them with a fuel gas flame or flares with or without the application of pressure and with or without the use of filler metal. Ten years ago the oxyacetylene method of welding and cut ting metals was hardly more than a laboratory process, but in the course of these few years it has. In this process, mostly oxy acetylene gas is used as fuel gas. Reverse flow check valves alone will not stop a flashback in the system.
Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. 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. This welding generates higher temperature than gas welding. It is, therefore, necessary that proper safety and operating procedures are understood prior to using such apparatus. In the arc welding, electricity is used to generate heat. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxy acetylene welding unit 3. Acetylene acetylene is the primary fuel for oxy fuel welding and is the fuel of choice for repair work and general cutting and welding, acetylene generator as used in bali by a reaction of calcium carbide with water. In this unit you will be introduced to oxyacetylene welding and the safety precautions required when using oxyacetylene equipment. Factors affecting quality in oxyfuel cutting operators manual.
Acetylene acetylene is the primary fuel for oxyfuel welding and is the fuel of choice for repair work and general cutting and welding, acetylene generator as used in. Safety in gas welding, cutting and similar processes page 3 of 11 preventing fire from heat, sparks, molten metal or direct contact with flame the flame from an oxyfuel gas torch often called a blowpipe is a very powerful source of ignition. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. All books are in clear copy here, and all files are secure so dont worry about it. Oxy acetylene cutting equipment oxy acetylene cutting torch oxy acetylene torch styles. Oxyfuel combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. By varying the relative amounts of acetylene and oxygen, a welder can produce different flame atmospheres and temperatures as he requires.
Dec 12, 2019 oxy acetylene cutting equipment oxy acetylene cutting torch oxy acetylene torch styles. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Read online oxyfuel welding, heating and cutting book pdf free download link book now. However, it is still widely used for a variety of applications.
When using an oxygenfuel gas process to perform welding or cutting, the operator must wear proper goggles or a full face shield fitted with at least a shade five 5. Safety in gas welding, cutting and similar processes. In fact, the oxyacetylene flame burns at 6000 f, and is the only gas flame that is hot enough to melt all commercial metals. Oxy acetylene torches can be used for a variety of processes, and is one of the many things that can be used to weld aluminum. Fundamentals of gas cutting and welding ced engineering.
This process can be done with or without help of filler material. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. The chemical action of the oxy acetylene flame can be adjusted. Persons can strike an object, or be struck by a moving or flyingfalling. This guide contains important information related to the safe and efficient operation of oxyfuel welding, cutting, and heating apparatus. Oxyfuel 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. Oxyfuel oxyacetylene welding a guide to gas welding twi. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Goggles or equivalent with the correct shade lens must be worn when welding or cutting. Setup and shutdown procedure for oxy fuel cutting torch. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. The equipment is easy to transport from worksite to worksite and is well suited for both mechanized and manual operations.
Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Fundamentals of gas cutting and welding cedengineering. Which of the following is not a general safety practice you should follow. Careless use of oxyfuel torches has caused many fires. What is the most common gas used for oxyfuel welding. Part 1 1991 glossary for welding, brazing, and thermal cutting. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. 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. Oxy fuel weldingcutting involves combining what of the following. In addition, there is a tube for high pressure oxygen, along with a cutting tip or nozzle. The impact of teaching oxyfuel welding on gas metal arc welding skills the journal of technology studies. Oxyfuel cutting uses acetylene and oxygen to preheat metal to red hot and then uses pure.
Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. Choose from 65 different sets of welding test oxyfuel flashcards on quizlet. Oxy fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. 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. In gas welding, fuel gases like acetylene, hydrogen are used to generate heat. 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.
Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible. As 48392001 the safe use of portable and mobile oxyfuel. While not practical for stainless steel or aluminum, oxy fuel cutting is a good process for mild and low alloy steels. For general fabrication or welding, or when working near machinery or on scaffolding. Use the diagram provided to compare and contrast what is similar, and what is different the oxyacetylene welding, and oxyfuel cutting processes. Check if exposure recommends or requires a style of ppe. What are the differences between arc and gas welding. In this unit you will be introduced to oxy acetylene welding and the safety precautions required when using oxy acetylene equipment. Chapter 1 from the welding handbook, tenth edition, volume 1, welding science and technology, has been selected by the aws product development committee as a service to indust. Oxyfuel equipment is versatile, lending itself to welding, brazing, brazewelding, silver soldering, metal. Read the steps below to get a feel for what is going on, and then get a shop ta to walk you through the process the first time. Mild steel is comprised of 98% iron, 1% manganese, carbon up to. Oxyfuel cutting is a chemical reaction between pure oxygen and steel to form iron oxide.
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. Apr 16, 2017 gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. Oxyfuel welding, heating and cutting pdf book manual. Further information can be obtained in the welding institute technical note 7 safety in welding and cutting. Do not use this system unless you have received authorization from the shop manager. Download oxyfuel welding, heating and cutting book pdf free download link or read online here in pdf. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxyacetylene welding unit 3. Setup and shutdown procedure for oxyfuel cutting torch a handout containing the highlights of the video titled setup and shutdown procedure for oxyfuel welding. This australian standard was prepared by committee me002, gas cylinders. Other welding techniques that are effective for aluminum include tig tungsten inert gas welding and mig metal inert gas welding. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. The process involves the melting of the base metal and a filler metal if used, by means of the flame produced at the tip of a welding torch. Oxy fuel cutting cannot cut nonferrous metals such as aluminum, stainless, brass or copper. Do not open the acetylene valve more than one and one half turns.
Do not permit untrained persons to install, operate, or maintain. It was approved on behalf of the council of standards australia on 31 august 2001. Welding, whether arc welding or oxyfuel, carries with it the potential for serious accidents. The cutting torch see figure 512 below, like the welding torch, has a tube for oxygen and one for acetylene. Pdf oxyfuel welding and cutting sewalem gezie academia. Gas welding is a fusion welding process in which the heat for welding is obtained by the combustion of oxygen and fuel gas. Fusion welding, with or without filler metal, in which the heat for welding is produced by the combustion of a fuel gas or gasses with an admixture of oxygen. May 08, 2018 welders can employ oxy fuel cutting for metals as thin as 1 mm and as thick as mm. Oxyacetylene torches can be used for a variety of processes, and is one of the many things that can be used to weld aluminum. Oxyfuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications. Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. When conducting oxyfuel cutting and welding operations, operators can experience backfires or flashbacks. Welders can employ oxyfuel cutting for metals as thin as 1 mm and as thick as mm. Although we will discuss some basic safety tips to lessen that potential, nothing can take the place of thoroughly reading your particular equipments operator manual and following all of the safety, operation and maintenance instructions it contains.
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