File Name: welding and cutting safety .zip
To be able to weld using safe practices and to know what personal protective equipment should be used.
- Welding Hazards in the Workplace: Safety Tips & Precautions
- Arc Welding Safety
- Welding - Personal Protective Equipment and Clothing
Welding Hazards in the Workplace: Safety Tips & Precautions
Properly installed and used the arc welder is very safe, but if used improperly the operator can be exposed to a number of hazards including toxic fumes, dusts, burns, fires, explosions, electric shock, radiation, noise, and heat stress. Any of these hazards can cause injury or death. By following suggestions and guidelines in this pamphlet the risks can be greatly minimized. Suitable fire extinguishing equipment such as buckets of sand or a dry chemical extinguisher of the ABC type should be readily available.
The extinguisher should be large enough for the situation with a 10 size adequate for most farm and school shops. Plastic disposable cigarette lighters are very dangerous around heat and flame. It is very important that they not be carried in the pockets while welding. Always provide protection to bystanders or other workers by welding inside a properly screened area, if possible. If unable to work inside a screened area then protection to others should be provided by a portable screen or shield, or by their wearing anti-flash goggles.
Because of their potentially explosive nature, we strongly recommend that no welding, cutting, or hot work be attempted on used drums, barrels, tanks, or other containers under any circumstances. If possible, work to be welded should be placed on a firebrick surface at a comfortable height. Welding should never be done directly on a concrete floor. Heat from the arc can cause steam to build-up in the floor which could cause an explosion. The welder cables should be positioned so that sparks and molten metal will not fall on them.
They should also be kept free of grease and oil and located where they will not be driven over. Electric welders can kill by electric shock. If the welding operation must be done on steel or other conductive material an insulating mat must be used under the operator. It is easier and safer to establish an arc on a clean surface than a dirty or rusty one. Therefore, metal should always be thoroughly cleaned by wire brushing or other method prior to welding.
When chipping slag or wire brushing the finished bead the operator should always be sure to protect his eyes and body from flying slag and chips. Unused electrodes and electrode stubs should not be left on the floor as they create a slipping hazard. Hot metal should be handled with metal tongs or pliers. When quenching hot metal in water it should be done carefully to prevent painful burns from the escaping steam.
Any metal left to cool should be carefully marked "HOT" with a soapstone. When welding is finished for the day or suspended for any length of time electrodes should be removed from the holder. The holder should be placed where no accidental contact could occur, and the welder should be disconnected from the power source.
Publication date: May Organization s : Arizona Cooperative Extension. More Like This. Be sure that the welder you purchase carries the seal of approval of one of these organizations.
Your local power supplier or a qualified electrician can assist you in determining this. Failure to do so could cause fire, a ground fault, or equipment failure. The following rules are not a complete list but are especially important guidelines which should be adhered to: The frame or case of the welder shall be properly grounded.
A safety-type disconnecting switch or controller shall be located near the machine See Figure 1. The welder or welders shall be protected by a properly sized fuse or circuit breaker on an independent circuit. In general, when welding is being done on metals not considered hazardous, a ventilation system that will move a minimum of cubic feet per minute CFM of air per welder is satisfactory.
However, many materials are considered very hazardous and should be welded only in adequately ventilated areas to prevent the accumulation of toxic materials or to eliminate possible oxygen deficiency not only to the operator but to others in the immediate vicinity.
Such ventilation should be supplied by an exhaust system located as close to the work as possible See Figure 2. When welding or cutting metals with hazardous coatings such as galvanized metal the operator should use a supplied-air type respirator or a respirator specially designed to filter the specific metal fume.
Materials included in the very hazardous category are welding rod fluxes, coverings, or other materials containing fluorine compounds, zinc, lead, beryllium, admium, and mercury.
Some cleaning and degreasing compounds as well as the metals they were cleaned with are also hazardous. Always follow the manufacturers precautions before welding or cutting in the presence of these materials. This can be accomplished by using metal sheets or fire resistant curtains as fire barriers.
The floor should be concrete or another fire resistant material. Cracks in the floor should be filled to prevent sparks and hot metal from entering. When work cannot be moved to a firesafe area then the area should be made safe by removing or protecting combustibles from ignition sources.
In certain welding situations it may be necessary to ask someone to watch for fires that could go undetected until the welder has finished the job. For body protection a pair of fire retardant long sleeved coveralls without cuffs is a good choice. Always avoid clothing with tears, snags, rips, or worn spots as these are easily ignited by sparks. The sleeves and collars should be kept buttoned.
The hands should be protected with leather gauntlet gloves. A pair o high top leather shoes, preferably safety shoes, is good protection for the feet. If low shoes are worn the ankles should be protected by fire resistant leggings. Eyes should be protected by transparent goggles if the person wears prescription glasses or safety glasses if not. A welding helmet or hand shield with filter plate and cover plate is mandatory for eye protection from the harmful rays of the arc.
The filter plate should be at least shade 10 for general welding up to amps. However, certain operations such as carbon-arc welding and higher current welding operations require darker shades. Never use a helmet if the filter plate or cover lens is cracked or broken. A flame-proof skull cap to protect the hair and head as well as hearing protection in noisy situations is recommended.
Never fuel the engine while running or in the presence of an open flame. Wipe up spilled fuel immediately and wait for fumes to disperse before starting the engine. Stop the engine before performing any maintenance or trouble shooting.
The ignition system should be disabled to prevent accidental start of the engine. Keep all guards and shields in place. Keep hands, hair, and clothing away from moving parts. It is desirable that one person be trained in first aid to treat the minor injuries that may occur.
All injuries, no matter how minor they may seem can become more serious if not properly treated by trained medical personnel. Never weld without adequate ventilation. Take proper precautions to prevent fires. Protect your entire body with fire retardant clothing, shoes, and gloves.
Wear eye protection at all times. Weld only in a firesafe area. Never do any welding, cutting, or hot work on used drums, barrels, tanks, or other containers. Mark metal "HOT" with a soapstone. Keep a well stocked first aid kit handy.
Arc Welding Safety
From: Employment and Social Development Canada. Request other formats online or call 1 O-Canada If you use a teletypewriter TTY , call This guideline provides a summary of the health effects associated with welding processes and the control measures that should be employed at the work place. Welding, for the purposes of this guideline, is the industrial process for making welds to join metals. Allied processes also involve metals and are somewhat similar with respect to the hazards created, they include gouging, cutting or grinding metal or otherwise preparing or finishing it.
Properly installed and used the arc welder is very safe, but if used improperly the operator can be exposed to a number of hazards including toxic fumes, dusts, burns, fires, explosions, electric shock, radiation, noise, and heat stress. Any of these hazards can cause injury or death. By following suggestions and guidelines in this pamphlet the risks can be greatly minimized. Suitable fire extinguishing equipment such as buckets of sand or a dry chemical extinguisher of the ABC type should be readily available. The extinguisher should be large enough for the situation with a 10 size adequate for most farm and school shops.
Welding operations present several hazards to both those undertaking the activity and others in the vicinity. During the arc welding process, live electrical circuits are used to create a pool of molten metal. Therefore, when welding, you are at risk of experiencing an electric shock. These include welding:. When carrying out welding activities, you are likely to be exposed to loud, prolonged noises.
WELDING AND CUTTING SAFETY. Welding, soldering, and brazing are commonly known as “hot work”. Hot work presents increased potential for fire and.
Welding - Personal Protective Equipment and Clothing
It is important to weld using safety precautions. There are many dangers related to welding. During the training session, have PPE available to show and for employees to try on.
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