The first step in preparing to arc weld is to make certain that the necessary equipment is available and that the welding machine is properly connected and in good. Before going to arc welding we first discuss welding so, welding is defined as. The electric arc is formed between an electrode which is usually but not always made of sintered tungsten and the work piece. It is important that the beads be deposited in a predetermined sequence to produce the soundest welds with the best. A qualified person is defined as one who, by possession of a recognized degree. Welding safety equipment welding grainger industrial supply. Welding safety equipment welding grainger industrial. Health hazards from welding, cutting, and brazing operations include exposures to metal fumes and to ultraviolet uv radiation. Of all injuries to welders, burns are the most common due to sparks landing on bare skin. Welding safety equipment is designed to withstand hazardous glare, sparks, spatter, and heat generated during welding to prevent injury to workers and avoid damage to equipment and surfaces. What will we do at the worksite to prevent injuries from arc welding and electrical hazards. Depending on the type shielding gas, this process is of also known as co. Welding personal protective equipment and clothing. Welding health and safety environmental health and safety.
Welding safety procedures thompson rivers university. Personal protective equipment ppe for welding and cutting. There are many ways in which welding can damage your health. In arc welding process, an electric arc between an electrode and a workpiece or between two electrodes is utilized to weld base metals. Guidelines for gas tungsten arc welding gtaw tig gtaw welding for product information, owners manual translations, and more, visit. Arc welding is a general term that can include shielded metalarc and gas shielded welding.
Since arc welding equipment varies in size and type, it is important to read and follow the manufacturers recommendations. In addition to arc welding safety standards published by national standards bodies and the american welding society aws, a part series has been published by the international electrotechnical commission iec, with each part looking closely at a single component of arc welding, setting forth requirements for both performance and safety, highlighting the everpresent attention to safety. Welding hazards pose an unusual combination of safety and health risks. From ear plugs and auto darkening welding helmets to respirators, welding gloves, bibs and chaps. Welding equipment shall be chosen for safe application to the work to be done as specified in paragraph b of this section. Y are approved safety glasses required to be worn at all times in areas where there is a risk of eye injuries such as punctures, abrasions, contusions, or burns3 y are protective gloves, aprons, shields, or other means approved against cuts, corrosive liquids, and. Stick welding is a manual arc welding process in which a covered metal stick electrode is used as the filler metal for making the weld.
To start, protective clothing and equipment must be worn during all welding operation including helmets and shields. Eye and face protection for welding and cutting operations. Since it is impractical to cite every possible variation occasioned by different welding conditions, only the information necessary for the commonly used positions and welds is discussed here. Welding safety equipment checklist kms tools and equipment. Shield metal arc welding smaw also known as manual metal arc welding. Wire welding is considered as a semiautomatic process, using a wire electrode thats conveniently fed through a welding gun. When these measures are overlooked, welders can encounter such dangers as electric shock, overexposure to fumes and gases, arc radiation, and fire and explosion. Arc welders use a powerful electric arc to make and repair plain, coated, or treated metal items.
This includes welders, supervisors, management, contractors, educa. A filler material is fed into the joint at the same time. Now supplying the power from machine to the electrodes by the electrode cable and holder. Federal or other laws and standards may govern different operations and facilities. The arc welding is a fusion welding process in which the heat required to fuse the metal is obtained from an electric arc between the base metal and an electrode. Welding, cutting, and allied processes supersedes ansi z49. Arc welding, also referred to as stick welding, has been performed successfully on almost all types of metals. Additional instruction and information pertaining to arc welding of other metals can be obtained from training institutions and the various manufacturers of the welding equipment. Welding helmets and goggles protect the head and eyes, and some even have autodarkening lenses that adjust the level of glare protection to suit the. In addition to arc welding safety standards published by national standards bodies and the american welding society aws, a part series has been published by the international electrotechnical commission iec, with each part looking closely at a single component of arc welding, setting forth requirements for both performance and safety, highlighting the ever. Arc welding procedures, techniques, and welding safety equipment part two in aircraft welding. Competencies given a functional welder, instruction and demonstration of use, each student will be able to.
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. This document should be read and understood by all persons involved with welding and cutting. Almost every farm, ranch, and vocational agriculture shop is equipped with one or more welders which are used for fabrication, repair, andor educational programs. Avoid welding in wet or damp areas, to prevent electrical shock. Plasma arc gouging pag this booklet contains guidelines on the safe handling and operation of electric welding and cutting equipment. A diagram of the gastungsten arc welding process setup is shown in figure 5. Consequently, the arc welding safety precautions listed below should always be observed. Arc welding procedures, techniques, and welding safety.
However, the basic elements involved in arc welding process are shown in the below fig. Arcwelding processes include shielded metal arc welding, metal inertgas welding, tungsten inertgas welding, plasma arc welding, and submerged arc welding. Safety and health topics welding, cutting, and brazing. Precautionary information for arc processes and equipment. According to the occupational safety and health administration osha, some facilities have been. The electrode is either a rod that simply carries current between the tip and the work, or a rod or wire that melts and. Welders supply company has everything a welding professional needs to work safely in any environment.
Welding operations continued 3 y are helpers or observers wearing proper eye protection to prevent flash burns. Arcwelding introduction arc welding is the fusion of two pieces of metal by an electric arc between the pieces being joined the work pieces and an electrode that is guided along the joint between the pieces. Protect skin and eyes from uv light, and shield your welding area from the eyes of onlookers. The arc welding temperature ranges from a minimum 3000degree centigrade to up to 20000degree centigrade. Welders can be stationary, electric powered or portable, dieselgas powered. Shop miller welding safety gear, including ppe welding jackets, welding helmets and gloves respirators, fume extractors, and heat stress equipment. Determine arc welding processes, tools and equipment, their use and safety. Some hazards are common to both electric arc and oxygenfuel gas welding. If you work with or near a welding operation, the following general. Keeping the arc welding operator in mind, here you will find both mandatory. Keep hands and body insulated from both the work and the metal electrode holder. Grove and fillet welds in heavy metals often require the deposit of a number of beads to complete a weld.
Explain the gas welding cutting tools and equipment, their use and safety. This section addresses the procedures as they may apply to fusion welding of steel plate and provides the basic steps and procedures required to. Pass a written test of safety and operating procedures of the arc welder with a minimum of 100 percent accuracy. Arc welding machinedefinition, types, parts, equipment. Check the welding equipment to make certain that electrode connections and insulation on holders and cables are in good condition.
Jan 25, 2020 consequently, the arc welding safety precautions listed below should always be observed. Personal protective equipment protective clothing welders, like firemen, must wear clothing to protect them from being burned. Miller welding safety equipment glasses, helmets, and. Additional sources for arc welding safety are given in the references. Arc welding is a general term that can include shielded metal arc and gas shielded welding. For example, keep welds away from areas where materials are painted or dipped. Arc length is controlled by a combination of the electrode size, welding position, and welding current. During the training session have personal protective equipment available to show and for employees to try on. Safety hazards from these operations include burns, eye damage, electrical shock, cuts, and crushed toes and fingers. Processes 215994 f 201801 guidelines for gas tungsten arc welding gtaw tig gtaw welding for product information, owners manual translations, and more, visit.
Personal protective equipment ppe for welding and cutting aws disclaims liability for any injury to persons or to property, or other damages of any nature whatsoever, whether special, indirect, consequential or compensatory, directly or indirectly resulting from the publication, use of, or reliance on this safety and health fact sheet. Safety, health and environment standards revision date. It is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence this is often done by melting the workpiece and adding a filler material from a pool of molten material that cools to become a strong joint. Welding and cutting can produce hazards such as sparks. Electric arc welding an overview sciencedirect topics. For gas cutting, welding, or brazing, the intensity of the light is much less than from arc welding, cutting or gouging processes. A main objective became to develop and maintain a range of welding equipment that is suitable for onboard welding, backed by a worldwide service network, training and documentation. Introduction the electric arc welder remains one of our most useful and timesaving pieces of shop equipment. An arc flash occurrence can have a productivity and financial impact as well. The basic principle of arc welding is shown in below fig. Plasma arc welding is an arc welding process similar to gas tungsten arc welding gtaw. For mig welding safety do not weld near flammable materials or fumes.
Arc welding processes include shielded metal arc welding, metal inertgas welding, tungsten inertgas welding, plasma arc welding, and submerged arc welding. Gasshielded arc welding of aluminium gasshielded welding can be divided into the tungsten gasshielded welding and the. So as the diagram is shown above in which set up has been shown. The electric arc is produced when two conductors are touches together and then separated by a small gap of 2 to 4 mm, such that the current continues to flow, through the air. Express the suitable welding joints, welding positions, electrodes, their use and selection. Safety in welding, cutting, and allied processes a safety document published by the american welding society that covers safe practices in the welding environment.
1405 808 1395 754 38 1428 1053 965 850 881 1014 34 14 813 1414 1508 1139 825 1484 606 537 899 713 617 393 1166 1354 666 339 443 642 957 842 1007 966 99 1236