Be sure cylinders are fastened with a chain as a protection against falling or rolling. Gas cutting gas cutting, sometimes referred to as flame cutting or oxygen cutting, involves an active exothermic oxidation of the steel being cut when the material has been preheated by an oxyfuel gas flame to the ignition temperature of around 900c. B restrict manual movement of portable cylinder banks to clean, smooth, level. 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. Mediumduty oxyacetylene cutting and welding outfit 770 502. An introduction to gas welding oxyacetylene this is a video by the world association of technology teachers. Apr 16, 2017 today we will learn about gas welding principle, working, equipments, types, application, advantages and disadvantages. In this video we will discuss about what is oxygen acetylene welding. 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 real tool of the oxyacetylene welding process is the flame, not the torch. 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 oxy fuel gas torch often called a blowpipe is a very powerful source of ignition. Oxy acetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. Identify and safely assemble regulators, hoses, torch and cylinders identify and understand the function of the component parts of the welding torch. Oxy acetylene, equipment,types of flames,applications by mohammed shafi november 7, 2018 march 21, 2020 gas welding process pdf.
The other equipments serves the same function as in case of oxyacetylene gas welding. The most commonly used method is oxyacetylene welding, due to its high flame temperature. Pass a written test on safety and operation procedures on the oxy acetylene unit with a minimum of 100 accuracy. Do not permit untrained persons to install, operate, or maintain. Includes metal filler selection chart and fuels chart. This process can be done with or without help of filler material. When you see the symbol, watch out, and follow the related instructions to avoid the hazard. Since gas welding is slower and easier to control than electric arc welding, it is often used in applications such as general maintenance work, brazing and soldering. Oxy fuel combustion is the process of burning a fuel using pure oxygen instead of air as the primary oxidant. In the arc welding, electricity is used to generate heat. Welding, cutting and brazing student safety guidelines.
The equipment is cheaper than most other types of welding rigs e. 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. The equipment for gas cutting is the same as for welding except that a special cutting. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel. Safety in gas welding, cutting and similar processes. In this process, mostly oxy acetylene gas is used as fuel gas. Welding, cutting, brazing, and heating hazards the symbols shown in this section are used throughout this. Oxyacetylene welding oaw the oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame. Start studying oxyfuel cutting processes important notes.
The other equipments serves the same function as in case of oxy acetylene gas welding. Careless use of oxy fuel torches has caused many fires. 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. However, unlike these, oxy acetylene, or arc welding, is much more widely used since it is relatively inexpensive and has equipment that is typically much more portable than tig or mig welding plants. Oxyfuel gas cylinder storage oxyfuel gas cylinder storage oar 437 division 2q division 3j you must properly store oxygen and fuel gas cylinders used for welding, cutting, brazing, soldering, and thermal spraying when they are not in use. Oxy acetylene welding, brazing, cutting and heating unit. These impurities, called oxides, result from oxy gen. Setup and shutdown procedure for oxyfuel cutting torch a handout containing the highlights of the video titled setup and shutdown procedure for oxyfuel welding. Jan 25, 2017 oxy acetylene welding is a very common welding process that dates back to 1890s, wherein oxygen and acetylene are used as the two major welding gases. Flame cutting is used to make the edges of the work pieces and for sheet cutting.
For detailed information about how to achieve better cut quality with oxy fuel cutting, download the free pdf file below. Gas welding is also named as oxyfuel gas welding ofw. This guide contains important information related to the safe and efficient operation of oxyfuel welding, cutting, and heating apparatus. Trade of metal fabrication phase 2 module 2 unit 6 unit 6 16 safety boc supplies equipment which is manufactured to the highest standards of quality and safety and will give firstclass service for many years if operated correctly.
It is, therefore, necessary that proper safety and operating procedures are understood prior to using such apparatus. Since gas welding is slower and easier to control than electric arc welding, it is often used in applications. This course introduces oxy fuel and plasmaarc cutting systems. 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. Included are welding techniques and safety precautions associated with gas welding. This welding generates higher temperature than gas welding. Oxyfuel oxyacetylene welding a guide to gas welding twi. The cutting torch see figure 512 below, like the welding torch, has a tube for oxygen and one for acetylene. Oxyfuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. 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. In addition, there is a tube for high pressure oxygen, along with a cutting tip or nozzle. The energy for gas welding comes from the combustion of a fuel with oxygen or air. There are several potential hazards present when using oxyfuel equipment.
Competencies given a functional oxy fuel gas unit, instruction and demonstration of use, each student will be able to. An introduction to gas welding oxyacetylene youtube. Inspection of portable and oxy fuel gas systems wi37. The spark lighter is used to ignite the oxyacetylene mixture at the tip of cutting torch. Oxy fuel welding commonly called oxyacetylene welding, oxy welding, or gas welding in the u. Requirements for the separation of oxidizers and fuel gases do not. By the end of this unit each apprentice will be able to. Careless use of oxyfuel torches has caused many fires. Oxyfuel welding and cutting the oxyfuel system is an auxiliary technique to welding developed since 1903 and used to date in many industrial applications. Oxyacetylene welding is simple in concept two pieces of metal are brought together, and the touching edges are melted by the flame with or without the addition of filler rod.
This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. A singlestage regulator will tend to allow a reduction in outlet pressure as the cylinder is emptied, requiring manual readjustment. Identify and state safety standards and precautions related to oxy fuel welding. Oxy fuel gases oxy fuel gases numerous gases are available for use in oxy fuel operations. However, it is still widely used for a variety of applications. Covers the minimum safety requirements for the use, inspection and maintenance of oxy fuel gas equipment, using portable cylinders, with. The chemical action of the oxyacetylene flame can be adjusted.
Experience gained from user contact and welding training of crewmembers showed that. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. Cp 7 the safe use of oxy fuel gas equipment individual portable or mobile cylinder supply revision 4. Each of the above type of welding can be further classified depending on other micro level characteristics. Welding institute technical note 7 safety in welding. Dec 12, 2019 oxy acetylene cutting equipment oxy acetylene cutting torch oxy acetylene torch styles.
Oxygen acetylene welding easily understand youtube. Oxy acetylene welding, brazing, cutting and heating lesson. Part 1 1991 glossary for welding, brazing, and thermal cutting. To attain a similar adiabatic flame temperature the o2 proportion of the gases passing through the burner is higher, typically 30%, higher than that for air of 21%. 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. Working pressure limits for welding hose is 200 psig maximum. This is a good book to learn oxyfuel gas welding, this is a paperback version of the book. An open flame or match should never be used the use of the proper type of filler rod is very important for oxy acetylene welding. In gas welding, fuel gases like acetylene, hydrogen are used to generate heat. Learn welding test oxyfuel with free interactive flashcards. The lighter consists of a fileshaped piece of steel, usually recessed in a cuplike device, and a replaceable flint, which, when drawn across the steel, produces a shower of sparks to light the fuel gas.
Oxyfuel cutting processes important notes flashcards quizlet. Pass a written test on safety and operation procedures on the oxy. Aluminum oxyfuel welding with fuels and metal filler. There are several potential hazards present when using oxy fuel equipment. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. Choose from 65 different sets of welding test oxyfuel flashcards on quizlet. Cutting with the oxyfuel process is just the opposite from of welding. In these process, a mixture in proper proportion of such as acetylene, liquefied petroleum, methyl acetylene propadene, natural gas and hydrogen with oxygen are burnt to get flame. Suitable for light duty fusion welding, braze welding, brazing and hand. Jan 14, 2017 in this video we will discuss about what is oxygen acetylene welding. Oxy fuel equipment is versatile, lending itself to welding, brazing, braze welding, silver soldering, metal heating for bending and forming and oxy fuel cutting. Oxyacetylene welding, commonly referred to as gas welding, is a process which relies on combustion of oxygen and acetylene. What are the differences between arc and gas welding. Trade of metal fabrication phase 2 module 2 unit 6 unit 6 18 hoses use hose which is in.
Introduction to welding in the navy as well as private industry, welding is. Ppt oxyacetylene welding powerpoint presentation free to. The little torch kit top precision and control for your smallest oxy fuel jobs. 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. French engineers edmond fouche and charles picard became the first to develop oxygenacetylene welding in 1903. Gases oxygen, acetylene and liquefied petroleum gas lpg. Unit 1 oxy acetylene welding introduction duration 7 hours learning outcome.
Oxy acetylene welding leaving certificate engineering notes. Oxy acetylene cutting equipment oxy acetylene cutting torch oxy acetylene torch styles. Always close the cylinder valve and replace protective cover before moving the. 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. 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.
One code is very widely used in the welding industry. Aug 02, 2018 working principle gas welding is a fusion welding process in which welding is done by heating workpiece with flames obtained from oxy fuel gases. Feb 15, 2019 intro to oxyacetylene welding part 2 duration. Wall, oxyfuel combustion technology for coalfired power generation, progress in energy and combustion science, 31, 283307, 2005 with a focus on a retrofit, that is, a comparison between air and oxyfuel firing using literature and some of our own research. 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. Since the nitrogen component of air is not heated, fuel consumption is reduced, and higher flame temperatures are possible. Wel120 oxy fuel cutting procedures 3 credits this course will include cutting of ferrous and nonferrous materials with manual, motor driven, and oxy fuel shape cutting equipment. Topics include safety, proper equipment setup, and operation of oxy fuel and plasmaarc cutting equipment with emphasis on straight line, curve and bevel 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. Proper eye protection must be wornoperate only with instructors permission and after proper instructions have been received. Fundamentals of gas cutting and welding ced engineering.
Factors affecting quality in oxyfuel cutting operators manual. This guide contains important information related to the safe and efficient operation of oxy fuel welding, cutting, and heating apparatus. A arc welding b gas welding c resistance welding skip to content engineering interview questions,mcqs,objective questions,class notes,seminor topics,lab viva pdf free download. Fundamentals of gas cutting and welding cedengineering. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Oxy fuel welding includes any welding operation that makes use of a fuel gas combined with oxygen as a heating medium. The chemical action of the oxy acetylene flame can be adjusted. Oxyacetylene oa welding is one of the many types of welding supported by the prl. So, if youre looking at a job where you need to weld aluminum, oxy. Following the inspection and installation of the regulators and hoses, the checklist is divided into two sections. The following notes will help to ensure your equipment is efficient and safe.
Of course, getting to show off flying sparks while you work is a nice bonus. See your distributor for the complete selection of tips and tip guides. Well begin with a brief history of related welding processes, in order to present oxy fuel welding in context. 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. Gas welding gas welding is a welding process that melts and joins metals by heating them with a flame caused by a reaction of fuel gas and oxygen. Setup and shutdown procedure for oxy fuel cutting torch. The spark lighter is used to ignite the oxy acetylene mixture at the tip of cutting torch. A few of the most popular fuels are acetylene, mapp gas and hydrogen. These rules apply to safe practices for users of oxy fuel gas welding, cutting. It is very important to note that welding goggles designed for oxygen fuel welding and cutting will not.