Results 1 to 8 of 8
  1. #1
    Platinum Member FredH's Avatar
    Join Date
    Jul 2007
    Posts
    615
    Location
    Ruch , Oregon
    Tractor
    N.H. TC-30

    Default Silly Question

    All the years that I have used a oxy / acet torch , I have wore the little funky goggles , Not ever really questioning " WHY " .

    So wondering , " WHY " . Eye protection from sparks , slag , etc...? Why not just safety glasses . Protection from bright light ?? ( Try driving down the road and having a bunch of chrome shining in your eyes ) .

    Wondering the same about Plasma cutting ?

    Welding I understand . Auto helmets like mine go from a green tint to darn dark before I can blink , But many a years in using a torch it was just those green tint goggles .

    Fred H.

  2. #2
    Platinum Member FredH's Avatar
    Join Date
    Jul 2007
    Posts
    615
    Location
    Ruch , Oregon
    Tractor
    N.H. TC-30

    Default Re: Silly Question

    This link is from Lincoln Electric . Shows lenses for Plasma cutting but not torch ?

    http://content.lincolnelectric.com/p...dinglenses.pdf


    Fred H.

  3. #3
    Veteran Member
    Join Date
    Mar 2007
    Posts
    1,371
    Location
    Midwest
    Tractor
    Iseki TA 247. Husqvarna 54",Gravely Zero, Cub Zero,.Polaris 850 ATV's Stihl 018 026 Pro, 029, 034 Super AV, 039, 044 Mag. Stihl Pole Saw.

    Default Re: Silly Question

    Haha. Yes the goofy goggles that no-one wears really do protect from an errant spark. The shade #5 is what is recognized as the minumum shade to prevent eye damage from the molten light. Many use shade 3 goggles or glasses but they are not fully protected. Plasma should really be treated the same as Welding as far as shade recomendation. My company calls for a shade 8 minumum with 9-11 preferred. I often use shade 5 for Plasma Demos but just for quick demos..

  4. #4
    Veteran Member brain55's Avatar
    Join Date
    Jan 2008
    Posts
    1,666
    Location
    Brentwood, CA

    Default Re: Silly Question

    I've started wearing a full face shield with a flip-down #5 lense for torch work. I really like it. They also make the same shield with a flip-down #10 for plasma work. I like having full face protection and then the option of flipping down the lense that is probably 1/3 of the size of the face shield.

    Brian

  5. #5
    Platinum Member FredH's Avatar
    Join Date
    Jul 2007
    Posts
    615
    Location
    Ruch , Oregon
    Tractor
    N.H. TC-30

    Default Re: Silly Question

    This link is a similar question to mine but posted on a Different B.B.

    New plasma cutter, eye protection question - Diesel Place

    The Shade #5 is mentioned in that discussion also , but as you mentioned #9 and up is similar to what Lincoln shows . Lincoln's chart though kind of confuses me , ( Does not take much ) . Shows amperage at top , so anything less than say around 55 amps does not need protection with plasma ?? Or below 80 amp mig welding ???

    I was looking at some safety goggles on EBAY , there was this one pair that made you look like you had Marty Feldman ( ?? ) eyes from the movie Young Frankinstien .

    Fred H.
    Last edited by FredH; 07-05-2010 at 11:03 PM.

  6. #6
    Advertiser Mark @ Everlast's Avatar
    Join Date
    May 2010
    Posts
    1,920
    Location
    South GA

    Default Re: Silly Question

    With the eye protection issue, there are different types of light.

    A oxy fuel flame gives off infrared light mostly, with fewer Ultraviolet. The IR light is what does the damage. Most cutting glasses filter 99.9% of IR light, regardless of shade. Now the intensity of the light itself, may necessitate a darker lens, but that is largely up to operator preference in most cases.

    A plasma torch gives off the same UV light that a welding arc does, and in so doing the plasma flame requires similar UV protection which almost all GOOD helmets filter well over 99% of the UV light emitted at any shade. Even the autodarks filter the UV at the light shade. Believe it or not, OSHA only has suggested shades, no REQUIRED standards for minimum shade darkness. They recommend a 8 shade, but freely admit that it isn't required because of the nature of the plasma flame is usually buried in the work and not directly visible. The reason for the shade differences is to protect from temporary blindness of course and to allow the operator to sufficiently see the puddle, but not from the damages that are more permanent from the UV burning out your retinas, and getting eyeball cancer. Though radiant energy is definitely a part of the issue as well, which most welding helmets block almost all IR as well.

    Oxyfuel glasses may or may not offer suitable protection for plasma cutting. And of course, due to the dangers of the UV light, additional face protection is recommended as well. The best thing is to have a helmet that offers a full range of shades so that the face is protected too. The Everlast Fabricator helmet offer a shade range of 4/ 7-15 for this type use. From the osha ppe standards:
    Filter Lenses for Protection Against Radiant Energy

    Operations Electrode size in Arc current Minimum*
    1/32 (0.8mm) protective
    shade
    Shielded metal
    arc welding < 3 < 60 7
    3 - 5 60 - 160 8
    5 - 8 160 - 250 10
    > 8 250 - 550 11
    Gas metal arc welding
    and flux cored
    arc welding < 60 7
    60 - 160 10
    160 - 250 10
    250 - 500 10
    Gas tungsten
    arc welding < 50 8
    50 - 150 8
    150 - 500 10
    Air carbon (light) < 500 10
    Arc cutting (heavy) 500 - 1,000 11
    Plasma arc welding < 20 6
    20 - 100 8
    100 - 400 10
    400 - 800 11
    Plasma arc cutting (light)** < 300 8
    (medium)** 300 - 400 9
    (heavy)** 400 - 800 10
    Torch brazing 3
    Torch soldering 2
    Carbon arc welding 14
    Filter Lenses for Protection Against Radiant Energy
    Operations Plate thickness Plate thickness Minimum*
    inches mm protective
    shade
    Gas welding:
    Light < 1/8 < 3.2 4
    Gas welding:
    Medium 1/8 - 1/2 3.2 - 12.7 5
    Gas welding:
    Heavy > 1/2 > 12.7 6
    Oxygen cutting:
    Light < 1 < 25 3
    Oxygen cutting:
    Medium 1 - 6 25 - 150 4
    Oxygen cutting:
    Heavy > 6 > 150 5
    Source: 29 CFR 1910.133(a)(5).
    * As a rule of thumb, start with a shade that is too dark to see the weld
    zone. Then go to a lighter shade which gives sufficient view of the weld
    zone without going below the minimum. In oxyfuel gas welding or
    cutting where the torch produces a high yellow light, it is desirable to
    use a filter lens that absorbs the yellow or sodium line in the visible light
    of the (spectrum) operation.
    ** These values apply where the actual arc is clearly seen. Experience
    has shown that lighter


    Sorry the cut and paste didn't work too well, but you can get the gist of it.
    Mark Lugo
    Everlast Welders
    http://www.everlastgenerators.com/

    Need a welder? Give me a call at (877) 755-9353 ext 204!

  7. #7
    Platinum Member
    Join Date
    Jun 2010
    Posts
    677
    Location
    w.v.
    Tractor
    ck30 kioti

    Default Re: Silly Question

    Safety glass work fine for oxy/act cutting,depends on your eyes,a little tint helps you see better to cut,if oxy/act welding you need to see the puddle so more tint would be usefull,also depends on how much cutting you do at a time.

  8. #8
    Gold Member Sandlot's Avatar
    Join Date
    Aug 2006
    Posts
    281
    Location
    CA. High Desert
    Tractor
    Kioti CK20(Gear)

    Default Re: Silly Question

    If you look up from your torch and see spots, you need a shaded lens. I too like a full face shield shade #5. Something like this.

    Faceshield Assembly - Welding Helmets - Supplies - Welding : Grainger Industrial Supply
    Kioti, CK20(Gear), Loader, Backhoe, Box Scraper, and Post Hole Digger.

Similar Threads

  1. Tres_Crows... Airplane question!
    By RobertN in forum Related Topics
    Replies: 10
    Last Post: 09-25-2004, 01:43 PM
  2. ASK A SILLY QUESTION
    By daedong in forum Oil, Fuel & Lubricants
    Replies: 9
    Last Post: 09-02-2004, 05:47 PM
  3. Silly Question
    By Bowhunter in forum Case-IH
    Replies: 12
    Last Post: 08-14-2004, 06:02 PM
  4. Silly question: float position?
    By davesisk in forum Power Trac
    Replies: 4
    Last Post: 05-07-2002, 01:11 PM
  5. Grading Back Blade plowing Question
    By Kubota-monkey in forum Kubota Owning/Operating
    Replies: 8
    Last Post: 02-09-2001, 08:05 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.