File Name: welding and cutting safety .zip
- Welding - Personal Protective Equipment and Clothing
- Welding Hazards in the Workplace: Safety Tips & Precautions
- Welding Hazards in the Workplace: Safety Tips & Precautions
To be able to weld using safe practices and to know what personal protective equipment should be used. Trainer's Note: It is important to weld using safety precautions.
From: Employment and Social Development Canada. Request other formats online or call 1 O-Canada If you use a teletypewriter TTY , call
Welding - Personal Protective Equipment and Clothing
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. There are two types of welding: heat or fusion welding, and pressure welding. Welding can be perfomed using electric arc, gas or thermal systems.
These processes often involve the use of multiple metals and chemicals and can lead to employee exposure to chemical agents as fumes and gases. Welding and cutting operations present certain hazards to welders that, if not properly controlled, can result in temporary or permanent physical injury, short- or long-term adverse health effects, discomfort and even death. Even though the Standard is not referenced in the COHSR, it is still a useful resource to better understand hazards associated with welding operations and allied processes and how to control these hazards.
Fumes produced during welding are solid particles, usually less than 1. These particles are capable of being deposited in the gas-exchange region of the lungs. The chemical composition of the welding fumes and gases and therefore the associated health hazards depend on the welded materials, the process and the filler rod or electrodes used.
Importantly, the work environment, including the location indoor vs. Usually, a welding operation is associated with the generation of two or more hazardous substances into the working atmosphere.
Therefore, the hazard should be evaluated by measurement of each constituent and, if the constituents have similar toxicological effects, or there is no information to the contrary, their synergistic combined effect should be given primary consideration.
Attention should also be paid to synergism with non-occupational risk factors, such as cigarette smoking. Smoking may enhance the adverse health effects of respiratory hazards related to welding. Sampling for welding fumes should be performed by qualified personnel, who possess knowledge, training and experience of sampling techniques, exposure limits and the work place processes. For welding fumes, the Occupational chemical agent compliance sampling guideline can be used to obtain information on sampling techniques, examples and calculation methods Footnote 2.
The Thermal Stress in the work place guideline is also a useful source for understanding the hazards associated with hot work environments and prevention strategies Footnote 3. The COHSR should also be referred to by qualified persons when sampling for welding contaminants and other physical hazards associated with welding processes. These regulations provide the requirements for hazard investigation, employee education and training, exposure limits and exposure measurement.
Hazards associated with welding processes can also be divided into hazardous chemical agents and physical agents. The chemical hazards include metal and contaminant fumes and gases, and organic vapours that are either used in the welding processes or produced during the processes. The physical agents include noise, radiation and thermal stress.
Each of these hazard categories are then associated with specific health concerns in workers. The nature of the work done in welding processes leads to ergonomic hazards. Processes that do not consider ergonomics can result in employees developing musculoskeletal injuries and disorders.
Musculoskeletal injuries, such as strains and sprains, can occur when a welder is welding in a static awkward or horizontal position with a heavy face shield. Neck problems are also associated with prolonged use of a combination of a hard hat and a welding helmet. The ergonomics of all welding processes must be assessed and appropriate controls implemented.
Welding and thermal cutting produce multiple types of metal and chemical fumes and gases, and organic vapours that can have specific and additive health effects. The information below summarizes the health effects and the associated sources Footnote 6 , Footnote 7 , Footnote 8. Inadvertent unprotected contact with heated metal will cause local burns to skin or cause clothing to catch fire resulting in burns to more of the body.
Hot environmental conditions at the work place can be caused by air temperature, radiant heat, humidity and air movement. Welding and cutting operations, and in particular plasma arc cutting, are known to produce heat. Prolonged exposure to heat along with physical activity and clothing can increase the internal body temperature which may lead to heat-related illnesses. Excessive and prolonged exposure to hot work environment can cause heat-related illnesses such as:. Some general signs and symptoms of heat illnesses include excessive sweating, rapid breathing, weakness, fainting, headache and confusion.
General welding processes and physically manipulating metals also produce high noise levels and in some cases, impulse noise. Excessive and long term exposure to noise among welders can cause noise-induced hearing losses, along with other non-auditory health effects such as cardiovascular diseases, stress, lack of sleep etc Footnote 7.
The plasma arc emits intense ultraviolet UV , visible light and infrared IR radiation. Appropriate eye protection is essential in welding. In addition, whenever the high voltage is on, an electron beam system is capable of generating X-rays. While investigating potential health hazards with respect to welding, it is important to consider the safety data sheets SDSs for each hazardous substance, metal or other chemical that is used in the welding operation.
The SDS also provides the available exposure limits from different regulatory bodies and physical and chemical properties that can be used to control the exposures at the work place. The exposure limits from the booklet must be used in monitoring and controlling exposure at the work place.
It includes requirements for hazard investigation, storage and handling, employee education and hazard control. The complete Part X must be followed and referred to at the work place. Some examples of subsections include Footnote 4 :. The controls employed should follow the hierarchy explained in the COHSR and multiple controls can be employed simultaneously. Adequate ventilation must be provided for all welding and allied processes.
The combination of general dilution ventilation and local exhaust is the most successful method in controlling welding fumes and gases. Dilution ventilation comprises of fans such as roof exhaust fans and wall fans. If used exclusively, dilution ventilation is not adequate to control the exposure of welders to welding fumes and gases to below the permissible occupational exposure limits. Some welding equipment come equipped with local exhaust ventilation attached to the welding equipment and is designed to remove the fumes and gases close to their point of origin.
Other local exhaust ventilation systems are comprised of a task-specific design hood, fan, duct, and air cleaner. Local exhaust can be discharged outside the building re-circulated through an air cleaner. The employer must ensure that the air cleaning system removes airborne contaminants, including toxic gases that may be generated during the welding process prior to re-circulating.
The effectiveness of a local exhaust ventilation system will depend on the distance of the hood from the source, exhaust air velocity and hood placement. Hoods must be located as close as possible to the welding points so that the welding fumes and gases are captured at the source. An air velocity of 0. In all processes that use shielding gases, air velocities in excess of 0.
For down-draft benches, it is necessary that an air velocity be great enough to assure that the fumes and gases generated during welding do not rise into the breathing zone of the welder. In addition, the welder must know that if the work pieces cover too much of the down-draft hood assembly the exhaust effect is lost. Further practical procedures for controlling welding fumes and gases are outlined in the CSA Standard W These procedures include the installation of ventilation and fume extraction equipment.
In some cases, the combination of both ventilation and respiratory protection may be necessary to reassure that the welders are protected. Where breathing air is provided for the purpose of a respirator, the air must meet the standards set out in the recent edition of the CSA Standard Z According to the Standard, a respiratory protection program must consist of the following components:.
Atmosphere-supplying respirators provide a breathing air that is independent of atmospheric conditions. For welding fumes, particulate removing respirators must be equipped with Welders using negative-pressure respirators only must be clean-shaven where the face piece seals to the skin.
Positive-pressure powered air purifying respirators that do not have a facepiece that seals to the skin do not require the workers to be clean shaven. Apart from respiratory protection, the workers should also use other forms of PPE either in conjunction with other controls or separate, keeping in mind that it is the least effective form of control. As mentioned earlier in this document, for all welding and cutting operations, welders must wear appropriate eye and face protection, and clothing.
Hearing protection may also be required depending on the levels of noise to which welders are exposed. The screens of sturdy opaque or translucent materials with at least 50 cm 20 inch bottom clearance for ventilation are recommended. Apart from the control measures above, there should also be general preventive strategies and administrative controls in place at the work place. Welders should receive regular training and education on handling equipment, protecting themselves, the hazards associated with welding processes and basic first aid.
There should be cleaning and maintenance procedures in place for the welding equipment so that any exposure through that route is reduced. The work stations should also be positioned in such a way that the welding fumes are released away from the worker.
Welding must not be performed in confined spaces in the absence of adequate ventilation. In case of any change to the health of the employee, the employers should be notified immediately. In addition, the work place should undergo regular monitoring and sampling so that exposure levels can be kept under the exposure limits. You will not receive a reply. Skip to main content Skip to "About government". On this page Introduction Welding fumes and gases Sampling for welding fumes Health effects 4.
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Welding Hazards in the Workplace: Safety Tips & Precautions
Health hazards from welding, cutting, and brazing operations include exposures to metal fumes and to ultraviolet UV radiation. Safety hazards from these operations include burns, eye damage, electrical shock, cuts, and crushed toes and fingers. Many of these can be controlled with proper work practices and personal protective equipment PPE. The following links provide information about potential hazards and possible solutions associated with these operations. Welding, Cutting, and Brazing. Hazards and Solutions Health hazards from welding, cutting, and brazing operations include exposures to metal fumes and to ultraviolet UV radiation.
WELDING AND CUTTING SAFETY. Welding, soldering, and brazing are commonly known as “hot work”. Hot work presents increased potential for fire and.
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.
Easy-to-read, question-and-answer fact sheets covering a wide range of workplace health and safety topics, from hazards to diseases to ergonomics to workplace promotion.
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