Video for my high school students to follow as they learn the process of using the oxyacetylene torch. Health and safety in welding pdf 564 kb welding health and safety assessment. Oxyacetylene welding oaw oaw is a manual process in which the welder must personally control the the torch movement and filler rod application the term oxyfuel gas welding outfit refers to all the equipment needed to weld. Safe operating procedures sop 15 oxy acetylene cutting. If not stopped, the fire can travel through and damage the torch, hoses and explode the cylinder. This safety advice of the gas describes the properties of acetylene that are related to safety, and offer practical hints for working safely with this gas. Adjust the oxygen regulator screw by turning it clockwise until the recommended pressure is achieved. Equipments used for oxyacetylene welding metallurgy. Oxyacetylene cutting safety in agriculture osha standard 1910. Oxygenacetylene welding, or gas welding, is a process which relies on combustion of oxygen and acetylene. They are essential to the safety of welding and cutting operations due to the potential hazards involved. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to.
Unfortunately, gas welding isnt taught as regularly as it used to be. Oxyacetylene equipment should not be left near hot equipment or metals which could burn the leads. Hot work permits covers the use of the hot work permit system as a primary means of preventing fires due to nonroutine open flame and high temperature processes. There is also a workplace assessment tool and a permit to work form. Safety for oxyacetylene welding thompson rivers university. This article throws light upon the ten basic equipments used for oxyacetylene welding. Oxygenacetylene welding, or gas welding, is a process which relies on. However, if it is used incorrectly, serious injury can occur to you and the equipment. Video an introduction to gas welding oxyacetylene oxyacetylene gas welding is commonly used to permanently join mild steel. Objective identify and use the safety practices that should be observed when welding with oxyacetylene gas. It is produced industrially by distilling air below its. Oxy acetylene welding safety test flashcards quizlet. In this process, mostly oxyacetylene gas is used as fuel gas. Proper attention to maintenance of equipment is necessary to prevent accidents.
When finished welding shut off the main valves, bleed. A mixture of oxygen and acetylene, burns as an intense focussed flame, at approximately 3,500 degrees centigrade. Oxyacetylene safety awareness explores oxyacetylene safety and includes gases, cylinder contruction and regulators. Fusion welding a welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Safety in gas welding, cutting and similar processes pdf. Welding jackets and sleeves cotton or leather required when weldingcutting safety shoes required when weldingcutting and handling heavy metal partspieces note. This is userfriendly illustrated guidance that covers a range of topics including training and qualifications, fire and explosion prevention, local exhaust ventilation, and noise and vibration. It describes the hazards associated with portable oxyfuel gas equipment and the precautions for avoiding injury and damage to property.
Welding, cutting, and brazing welding is a process that joins materials together by melting a metal work piece along with a filler metal to form a strong joint. For all employees, instructors and students who will be working with oxyacetylene welding equipment and 3. Oxy acetylene welding ofw fundamentals pressure settings. An approved code of practice is a practical guide to achieving the standards of health. 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.
Its a shame, because oxy acetylene welding teaches you how to manipulate a. This process can be done with or without help of filler material. Oxyacetylene welding is one of the most common forms of welding in use throughout industry. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Wear proper clothing and personal protective equipment ppe. Normal air contains 21% of oxygen and the way in which common materials burn in it is well known. Precautions and safe practices for gas welding, cutting. This procedure provides safety and health instructions regarding gas and electric welding, cutting, brazing, or similar flame or sparkproducing operations to protect personnel and property against heat, evolved gases and fumes, electrical shock, and radiation. Oxygen and acetylene use and safety virginia department of. Oxyfuel welding and oxyfuel cutting are processes that use fuel gases and oxygen to weld or.
Safety in gas welding, cutting and similar processes. When mixed together in correct proportions within a handheld torch or blowpipe, a hot flame is produced with a temperature of about 3,200c. To provide safety guidance in the use in performing oxyacetylene welding. In order to discuss the various aspects of welding, cutting and brazing safety, first we need to cover the basics in this first module. Further information can be obtained in the welding institute technical note 7 safety in welding and cutting. Welding, cutting and brazing student safety guidelines. Gas welding is a type of liquid state welding process in which fuel gases burns to generate heat. This jha provides only the minimum ppesafety requirements necessary to safely complete the task or assignment, and the jha. The specific personal protection equipment ppe required will depend on the type of hot work being performed. In addition to the purposes of welding connecting, gas welding can also be used as preheating, brazing, cutting, and hard facing. The oxyacetylene torch is a safe tool if used properly. Fundamentals of gas cutting and welding ced engineering. However, if it is used incorrectly, serious injury can occur to you and the. Safety in gas welding, cutting and similar processes this leaflet is for people who use compressed gases for welding, hot cutting and similar processes.
General safety tips work under the supervision of trained and qualified. Oxyacetylene 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. Oxyacetylene cutting is also just as easy to learn and provides a means to cut through very thick materials. 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. Refer to the victor acetylene cutting tip chart in appendix a or welding nozzle flow data in appendix b for the recommended pressures. Safety in gas welding, cutting and similar processes hse. Occupational safety and health hazard awareness training for the construction, oil and gas, and landscaping industries west virginia university research corporation 2011.
Fusion weldinga welding process that joins metals by heating them to be a melting point and allowing them to fuse or flow together. Oaw is one of the easiest forms of welding to learn and the equipment is low cost. Ensure the gloves, welding gun and work leads are in good condition. Safety compliance checklist welding operations general 29 cfr 1910 y hot work permit msfc 1155 completed and approved. When opening tank valves, always open valves slowly so pressure on regulators is. However, most of the users may not be aware of the unique characteristics of acetylene gas itself that create special hazards than the other fuel gases. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint.
Acetylene is very flammable and hazardous and can ignite at a wide range of concentrations. Always have the spindle key in the acetylene cylinder valve. Oxyfuel gas equipment has many uses welding, cutting, heating, straightening, and descaling. Safety with oxyacetylene welding or cutting irish oxygen. Oxygen and acetylene use and safety ar training updated 2012 dmme division of mineral mining.
Y y mechanical ventilation is required if space is less than 10,000 cubic feet per welder, rooms having a ceiling height less than 16 feet. This module will introduce you to the oxyacetylene welding oaw and cutting process. Materials oxygen cylinder, acetylene cylinder, regulator, valves, torch, welding tips, goggles, friction lighter, tip cleaner, personal safety equipment. When these measures are overlooked or ignored, however, welders can. In concentrations higher than 21%, however, the situation is different. Chemistry of oxy acetylene process the most common fuel used in welding is acetylene. A common inside diameter of oxyfuel gas hose is 14 inch. Dont smoke when welding or near welding and dont keep your lighter in your pocket it could explode. For example, cutting with an oxyacetylene torch will require a different type of eye protection than would shielded metal arc welding smaw. Safety with oxyacetylene welding or cutting fires and explosions due to the misuse of oxygen oxygen is necessary for combustion. We dont have the space to list them all here, but new welding equipment comes. Rk sk oxyacetylene welding techniques flame settings. This checklist helps employers and employees in general industry and construction comply with the occupational safety and health administration oshas standards for welding, cutting, and brazing.
This booklet provides safety and health information on oxyfuel gas welding, cutting, heating, and allied products and processes such as brazing, soldering. The oxyacetylene torch can be used for various tasks. Oxyacetylene welding and safety 2010 safetycare welding. Welding 5 psi acet5 psi oxy cutting 5 psi acet20 psi oxy. Rk nozzle selection, working gas pressures, filler materials.
It can be used for cutting steel, welding steel, brazing and for heating metal. The chemical action of the oxyacetylene flame can be adjusted. The oxyacetylene process produces a high temperature flame, over 3000 degrees c, by the combustion of pure oxygen and acetylene. Safety and health at work for gas welding and flame cutting. Oxyacetylene cutting safety occupational safety and.
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