Best filter for welding fumes?

[Atom Cat]

My brother gave me a half mask respirator from his construction job. It feels like a solid mask and fits well. I've been wearing it while practicing stick and MIG welding in my garage, but I'm not sure which filter is safest for welding fumes. I see some people online use pancake filters since they fit under the hood better. Are those good enough for welding smoke, or should I look for something else? I just want to make sure I'm staying safe while I learn.

 

[Cov3ll.WG]

A P100 filter is the minimum you should be looking for. It's an excellent particulate filter, and the 100 means it's rated to filter out 99.97% of airborne particles. That's what you have to look out for with welding, especially since a lot of the stuff you're burning off has metals in it. A lot of the pancake filters you see are P100s, which is why they're so popular with welders. They're low profile and fit under a hood without a problem. So as long as the filters are P100, you'll be good for general welding smoke! Just make sure the mask itself is a good brand and you're getting a good seal. If you can smell the smoke, the seal is bad or the filter is shot!

 

[Atom Cat]

A P100 filter is the minimum you should be looking for. It's an excellent particulate filter, and the 100 means it's rated to filter out 99.97% of airborne particles. That's what you have to look out for with welding, especially since a lot of the stuff you're burning off has metals in it. A lot of the pancake filters you see are P100s, which is why they're so popular with welders. They're low profile and fit under a hood without a problem. So as long as the filters are P100, you'll be good for general welding smoke! Just make sure the mask itself is a good brand and you're getting a good seal. If you can smell the smoke, the seal is bad or the filter is shot!

This answered my question about pancake filters and helped me understand the 'P100' rating, which I was missing. Now I know the filter's rating matters more than its shape. I plan to visit the local welding supply shop this weekend to find a set of P100 filters for my mask. Is there a general rule for how long filters last, or should I just replace them when breathing becomes difficult?

 

[Cov3ll.WG]

Apologies for not getting back sooner.. Yes, the P100 rating is key. There isn't a strict number of days for using pure particulate filters, like there is for gas cartridges but you should definitely replace it when you notice breathing resistance getting difficult. That's the practical indicator that the filter media is clogged with dust and metal particles. Als toss them immediately when they get wet as that compromises the filtration. A casual hobbyist might get a few months out of a set, but if you start feeling like you're sucking through a straw, it's definitely time for fresh ones!

 

[Atom Cat]

Apologies for not getting back sooner.. Yes, the P100 rating is key. There isn't a strict number of days for using pure particulate filters, like there is for gas cartridges but you should definitely replace it when you notice breathing resistance getting difficult. That's the practical indicator that the filter media is clogged with dust and metal particles. Als toss them immediately when they get wet as that compromises the filtration. A casual hobbyist might get a few months out of a set, but if you start feeling like you're sucking through a straw, it's definitely time for fresh ones!

Breathing’s still easy so I’ll hold off replacing for now. Have you noticed any difference in how long pancake-style P100s last compared to the bulkier cartridge types?

 

[Alan]

My brother gave me a half mask respirator from his construction job. It feels like a solid mask and fits well. I've been wearing it while practicing stick and MIG welding in my garage, but I'm not sure which filter is safest for welding fumes. I see some people online use pancake filters since they fit under the hood better. Are those good enough for welding smoke, or should I look for something else? I just want to make sure I'm staying safe while I learn.

Nice topic, what kind of welding are you doing most, stick or MIG?