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> Welding Fumes
Technic Al
post May 23 2017, 09:15 AM
Joined: 14-Oct 03

Just in case people are not aware. This has been published recently

The International Agency for Research on Cancer (IARC) has updated its classification for welding fumes and UV radiation from welding to Group 1 carcinogens, the agency’s designation for agents that carry sufficient evidence of carcinogenicity in humans.

A previous IARC assessment done in 1989 classified welding fumes and UV exposure in Group B as “possibly carcinogenic to humans.”

In March, a group of 17 scientists from 10 countries met to reevaluate the risk welding fume exposure presents to people based on new evidence that has since accumulated from observational and experimental studies.

In a report published in May's The Lancet Oncology, researchers found that arc welding generates UV radiation: a risk factor for various cancers of the eye and eye burns.

Welding fumes were also found to increase the risk of lung cancer, and to some degree kidney cancer and chronic inflammation. Researchers also noted that solvents used for cleaning metal in tandem with welding, such as trichloroethylene, showed an increased risk for kidney cancer.

OSHA's suggestions to reduce exposure to welding fumes include:

Welding surfaces should be cleaned of any coating that could potentially create toxic exposure, such as solvent residue and paint.
Workers should position themselves to avoid breathing welding fume and gases. For example, workers should stay upwind when welding in open or outdoor environments. General ventilation, the natural or forced movement of fresh air, can reduce fume and gas levels in the work area. Welding outdoors or in open work spaces does not guarantee adequate ventilation. In work areas without ventilation and exhaust systems, welders should use natural drafts along with proper positioning to keep fume and gases away from themselves and other workers.
Local exhaust ventilation systems can be used to remove fume and gases from the welder’s breathing zone. Keep fume hoods, fume extractor guns and vacuum nozzles close to the plume source to remove the maximum amount of fume and gases. Portable or flexible exhaust systems can be positioned so that fume and gases are drawn away from the welder. Keep exhaust ports away from other workers.
Consider substituting a lower fume-generating or less toxic welding type or consumable.
Do not weld in confined spaces without ventilation. Refer to applicable OSHA regulations
Respiratory protection may be required if work practices and ventilation do not reduce exposures to safe levels.
NIOSH offers many resources for welders seeking information on protective gear and best safety practices.
post May 23 2017, 09:42 AM
Joined: 14-Jan 07

Thanks Al.
You didn't mention method 1 of Standard ABC12345 - hold your breath for the duration of the run. Refinement 1a - swing your head around in a swoop to the side after the run and before breathing, so the movement of air clears smoke from inside the visor, so when you do breath it's sweet air.
How do people rate the breathing equipment like the "Speedglas" battery-powered filter and supply? One comment is - you absolutely cannot smell the burning paint, etc - the inlet out of the way and the filtration seem to be fully effective...
Try Some
post May 27 2017, 08:34 AM
Joined: 19-Sep 16

I use the speed glass 9100xx with the ad floor pump and it totally eliminates fume from the shield.I use a gas filter with the particle filter which cleans out smoke and most importantly the ozone gas that comes with tight and heavy mig welding.our job supplied the gear so was no problem using it.very expensive otherwise.only thing is the helmet is bulky.fume is a big hazard where we are and worse is the microscopic grin ding particles which stick in your lungs and guarantee to rust in there.is see so many new apprentices starting out grinding piping without a decent dust mask.bad start.aflow speed glass is top class but you need your employer to supply spares because you use a lot of particle filters and cover screens and they are expensive
post May 31 2017, 05:44 AM
Joined: 14-Jan 07

Interesting point about grinding dust, "Rook".
What you describe about welding - that is what anyone with a "Adflo" set has said to me - good.
If you are washing black "bogeys" out of your nose - what should be interpreted about that?
Comes mainly from grinding?
It's annoying when the angle-grinders are too small for the job and you are exerting away doing a slow job, when a 9-inch would cut cleanly and send a trail of sparks (the dust) well away from you - against a wall or curtain.
What is the real deal on grinding dust and using grinders on ordinary steel (it's not particularly toxic) ?
Try Some
Butt animal
post Jul 16 2017, 08:10 PM
Joined: 29-Nov 15

Cryptogenic Organising pneumonia,
geoffry harvey
post Jul 17 2017, 12:50 PM
Joined: 6-Jul 17

Some great points from Rook!
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