Do not perform any hot work electric or gas welding, cutting, and brazing or. Safety in welding, cutting, and allied processes, z49. Welders should read and understand the safety data sheets for welding cutting gases. 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. Welding and cuttingpdf university of hawaii at manoa. Oxyfuel welding, heating and cutting concoa gas pressure. This guide, and all the information contained within, is intended to provide you with. All welding is carried out on the welders own risk and account. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint.
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 is a type of liquid state welding process in which fuel gases burns to generate heat. Welding hazards pose an unusual combination of safety and health risks. Welding health and safety ss832 march 2015 page 4 gas metal arc welding gmaw or mig metal inert gas welding is an arc welding process wherein coalescence is produced by heating with an arc between a continuous filler metal electrode typically a steel alloy wire and the work. There is also a workplace assessment tool and a permit to work form. Always protect you, other workers, welding hoses, gas cylinders, and.
Welding workplace safety the welding management and supervisors are responsible for. Hot work safety national fire protection association. 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. By its nature, welding produces fumes and noise, gives off radiation, involves electricity or gases, and has the potential for burns, shock, fire, and explosions. Pass a written test on safety and operation procedures on the oxyacetylene unit with a minimum of 100 accuracy. Y when working in confined places, are environmental monitoring tests taken. Insulating devices on terminals of a welding machine 9. Arc welding underground before any work begins, obtain a hot work permit as outlined in the hot work permit procedure. Safety and health at work for gas welding and flame cutting. Oxyacetylene and oxymapp methylacetylenepropadiene welding are two types of gas welding processes. Competencies given a functional oxyfuel gas unit, instruction and demonstration of use, each student will be able to. Wear proper clothing and personal protective equipment ppe.
Electric shock from electrical welding and cutting equipment can result in death or severe burns. Controlling hazardous fume and occupational safety and. Safe storage, handling, and use american welding society 8669 doral blvd. Additional information is available in the american welding society publications listed in the references section of this book. Today we will learn about gas welding principle, working, equipments, types, application, advantages and disadvantages. Safety and health at work for gas welding and flame cutting 2 1. Rev date 09302014 printed copies of this document are uncontrolled. Safety in gas welding, cutting and similar processes. Connect the cutting hoses to the regulators with hose clamps. This safety hazard is associated with operations that use electricity to.
It is very important to note that welding goggles designed for oxygenfuel welding and cutting will not. Oxyfuel welding, cutting and heating oxygenacetylene oxyacetylene or oxygen propane oxypropane mixtures are the most common fuel. The safe practices are also applicable to welding or cutting with flames using other fuel gases such as propane. Ensure that gas cylinders are fitted with valve caps and use appropriate cylinder trolleys for the transport of cylinders use of gas distribution systems is recommended to increase safety and reduce the need for transporting cylinders around the ship never use. Oct 01, 2009 arcs generate, to a greater or lesser degree, radiation spanning ultraviolet to infrared and metal evaporation that condenses to fume. You should be familiar with the information in this booklet as well as safety in welding and cutting ansi z49. This booklet provides safety and health information on oxyfuel gas welding, cutting, heating, and allied products and processes such as brazing, soldering, and use of airfuel gas equipment. Welding, burning, and cutting environmental health and safety. Some welded products include ships, aircraft, automobiles. Material safety data sheet central welding supply gas. Gas metal arc welding gmaw or mig metal inert gas welding is an arc welding process wherein coalescence is produced by heating with an arc between a continuous filler metal electrode typically a steel alloy wire and the work. During the training session, have ppe available to show and for employees to try on. Then open the hand torch oxygen valve and adjust the flame.
Comfort is a key component in wearability, so choose a jacket that is appropriate. The area should be cleared for a radius of 35 feet. Mcr safety s welding products are designed to keep welders safe from numerous workplace hazards. Precautionary information for oxyfuel gas processes 8. Welding leathers are preferred and required if welding overhead.
Y are pressurereducing regulators used only for the gas and pressures for which they are intended. Wear an approved welding helmet fitted with a proper shade of filter lenses to protect your face and eyes from arc rays and sparks when welding or watching see ansi z49. Fs page 1 job safety analysis safety information for the university of california, berkeley facilities services using an oxyacetylene welder a welding area of a minimum of 35 feet in diameter must be established. The process uses shielding from an externally supplied gas to protect the molten weld pool. Fix the da and oxygen regulator to the respective cylinders after ensuring free from dirt or grease. Arcs generate, to a greater or lesser degree, radiation spanning ultraviolet to infrared and metal evaporation that condenses to fume. Welding safety hazards and precautions health and safety. Gas metal arc welding gmaw, by definition, is an arc welding process which produces the coalescence of metals by heating them with an arc between a continuously fed filler metal electrode and the work. Always conduct gas welding in well ventilated areas. Wear snug fitting clothing that will not burn or melt readily and welding gloves. This leaflet is for people who use compressed gases for welding, hot cutting and similar processes. The fire watch must remain on site for a minimum of 60 minutes to monitor for smoldering fires, per nfpa 51b, standard for fire prevention during welding, cutting, and other hot work 2019 edition.
If the oxy welding cutting equipment is to be operated in a dangerous or hostile environment, the userclient. Begin gas welding tasks by opening the acetylene valve on the hand torch and lighting the gas. Wire welding properly known as gmaw gas metal arc welding or fcaw fluxcored arc welding. Before going to gas welding let me discuss what is welding so, welding is defined as a fabrication process that joins materials, usually metals or. Background most farms and small shops have some type of equipment for welding and cutting metals. Apr 16, 2017 today we will learn about gas welding principle, working, equipments, types, application, advantages and disadvantages. Welding should be executed by a qualified and experienced welder and adequate safety measures should always be adhered to. 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.
Additional sources for arc welding safety are given in the references. In this unit you will be introduced to oxyacetylene welding and the safety precautions required when using oxyacetylene equipment. Y is red used to identify the acetylene and other fuel gas hose, green for oxygen hose, and black for inert gas and air hose. From leather gloves and flameresistant clothing, to sateen cotton and eyewear, we have a multitude of options to fit your protective needs. This booklet provides safety and health information on oxyfuel gas welding, cutting, heating, and allied products and processes such as brazing, soldering. This leaflet is for people who use compressed gases for welding, hot. This is usually done by applying heat and energy when bringing the pieces of metal together. Warning welding equipment esab north america esab welding. 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. Rockhampton office brisbane office tarong site barron gorge hydro ps kareeya hydro ps mica creek ps koombooloomba hydro ps swanbank ps mackay gas turbine wivenhoe small hydro ps stanwell ps meandu mine table of contents. Argon argon material safety data sheet commercial names. Flux cored arc welding fcaw gas metal arc welding gmaw, also known as metal inert gas mig welding or hand wire welding. Oxygen and acetylene use and safety ar training updated 2012 dmme division of mineral mining.
Additionally, serious injury can occur if the welder falls as a result of the shock. Like all welding safety equipment, welding jackets are effective when they feature durable flameresistant materials, fit properly and, most importantly, are actually worn by the welder. 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. This bulletin is written with the arc welding operator in mind, containing both mandatory safety practices and those based on shop experience. Welding operations continued 2 y before a regulator is removed, is the valve closed and gas released from the regulator. At the end of the articles you will find the download pdf button that you can easily download pdf. Other applications of gas welding include welding of hot water pipes, gas bottles, nuclear heat exchangers and boilers. Welding safety always remember welding is serious business. Gas tungsten arc welding gtaw or tungsten inert gas tig welding. Use protective screens or barriers to protect others from flash.
It describes the hazards associated with portable oxyfuel gas equipment and the precautions for avoiding injury and damage to property. Welding safety document number ohsproc7 this document applies to the following sites. Welding, cutting and brazing student safety guidelines. Upon completion of a welding, heating, or cutting operation, immediately inspect the surrounding areas for smoldering embers. Welding and cutting are common industrial operations, but there is lack of adequate. Safety in gas welding, cutting and similar processes hse. This standard provides safety requirements for oxygenfueled gas cutting and welding systems to reduce the risk of fires and explosions. In order to discuss the various aspects of welding, cutting and brazing safety, first we need to cover the basics in this first module. Thermit welding uses a chemical reaction to produce intense heat instead of using gas fuel or electric current. Fundamentals of gas cutting and welding ced engineering. Module 2 thermal processes unit 1 introduction to thermal processes and safety unit 2 introduction to oxyacetylene welding unit 3 manual. Safety in gas welding, cutting and similar processes this leaflet is for people who use compressed gases for welding, hot cutting and similar processes. Definition, equipment, flames, working, types, advantages, disadvantages, applications in detail note. Welding safety procedures thompson rivers university.
When welding operations are suspended for a substantial period of time, such as lunch or overnight, gas. Gas may accumulate in low or confined areas or travel a considerable distance to a source. Trainers note it is important to weld using safety precautions. Kms has tig welding gloves in a range of styles and brands. In a fire or if heated, a pressure increase will occur and the container may burst, with the risk of a subsequent explosion. The vapor gas is heavier than air and will spread along the ground. Mig metal inert gas, also known as gmaw, gas metal arc welding welding uses an aluminum alloy wire as a combined electrode and filler material. Health and safety in welding pdf 564 kb welding health and safety assessment. Gas welding is very suitable for welding pipes and tubes. Which of the following is not a general safety practice you should follow when using welding cutting equipment.
Material safety data sheet gas, safety and welding. Welding 5 psi acet5 psi oxy cutting 5 psi acet20 psi oxy. Gas welding is rarely used in production now, but oxyfuel gas processes are still prevalent for cutting. Follow the precautions in this safety section and those throughout this manual for your personal safety and the safety of people near the equipment. Each of these aspects has implication on the health and safety of the welder. Precautions and safe practices for gas welding, cutting.
During the training session have personal protective equipment available to show and for employees to try on. Welding safety equipment checklist kms tools and equipment. Wear approved safety glasses with side shields under your helmet. Transporting, moving, and storing compressed gas cylinders. Welding is a general term for various processes used to join metal parts by producing a coalescence, called a weld, at a joint. Y is a check made for adequate ventilation in and where welding or cutting is performed. It is based on 29 code of federal regulations cfr part 1910. Thermit welding uses a chemical reaction to produce intense heat instead of using gas. It contains information on protection of personnel. To be able to weld using safe practices and to know what personal protective equipment ppe should be used. Safety in welding and cutting secretariat american welding society abstract this standard covers all aspects of safety and health in the welding environment, emphasizing oxygen gas and arc welding processes with some coverage given to resistance welding. Gas or oxyfuel welding uses a flame from burning a gas usually acetylene to melt metal at a joint to be welded, and is a common method for welding iron, steel, cast iron, and copper. 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. Safety and health of welders written by the staff of hobart institute of welding technology.
Y if welding is to be conducted in an area containing compressed gas containers and flammable or explosive materials. This instruction should be read in conjunction with the risk assessment procedure for oxy weldingcutting equipment general safety safety glasses must be worn at all times in work area. Some hazards are common to both electric arc and oxygenfuel gas welding. Please send hydro testing hazards and safety related pdf. The flame is hot enough to fuse the metal surfaces together for welding.
Safe operating procedures sop 15 oxy acetylene cutting. The slag accumulated at the blow pipe tip to be frequently removed gas flame not to be played on the cylinder or their attachments. Oxygen and acetylene use and safety ar training updated 2012. Organizations ohio state university extension pdf version. A few of the most popular fuels are acetylene, mapp gas and hydrogen. It is both effective and economic for applications such as construction and repair of heating, ventilation and air conditioning hvac systems.
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