Flashback arrestors...do they go bad?
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  1. #1
    Join Date
    Aug 2007
    Posts
    313

    Flashback arrestors...do they go bad?

    Kind of an odd question, but short of any obvious damage, do flash arrestors go bad? I picked up a couple sets in a package deal of stuff, and while physically they look OK, they are clearly not new. Any reason to avoid using them?

  2. #2
    Join Date
    Sep 2013
    Location
    central Wis.
    Posts
    3,807

    Re: Flashback arrestors...do they go bad?

    I have the acetylene ones plug up to the point where there was almost zero gas flow.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

  3. #3
    Join Date
    Aug 2007
    Posts
    313

    Re: Flashback arrestors...do they go bad?

    Was it fairly obvious by looking at them?

  4. #4
    Join Date
    Sep 2013
    Location
    central Wis.
    Posts
    3,807

    Re: Flashback arrestors...do they go bad?

    Yeah, they had a somewhat wet black soot in them.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

  5. #5
    Join Date
    Feb 2010
    Location
    Northern MN
    Posts
    1,273

    Re: Flashback arrestors...do they go bad?

    Aren't they basically a brass foam filling? I'd say short of plugging or being mechanically damaged they shouldn't go bad

  6. #6
    Join Date
    Oct 2015
    Posts
    1,729

    Re: Flashback arrestors...do they go bad?

    According to the manufacturers they should be replaced every 5 years. At least thats the way it was the last time I looked into it. With that said I have not done that with my personal ones. When I was a supervisor for a large construction company I did it every 5 years.

  7. #7
    Join Date
    Aug 2007
    Posts
    313

    Re: Flashback arrestors...do they go bad?

    Here are a few pics...






  8. #8
    Join Date
    Jan 2016
    Posts
    2,796

    Re: Flashback arrestors...do they go bad?

    they are cheap enough to replace for what they may save you from, why temp fate, buy a new set..heres hobarts for a reasonable price less than $8.00 a year if you replace every 5... https://www.amazon.com/Hobart-770506...hback+arrestor

  9. #9
    Join Date
    Apr 2008
    Location
    NW ON Canada
    Posts
    2,960

    Re: Flashback arrestors...do they go bad?

    I've had them fail in the past, wouldn't allow any gas to pass through. It's not real common but it can happen.
    Jason
    Lincoln Idealarc 250 stick/tig
    Thermal Dynamics Cutmaster 52
    Miller Bobcat 250
    Torchmate CNC table
    Thermal Arc Hefty 2
    Ironworkers Local 720

  10. #10
    Join Date
    Jun 2016
    Location
    Not there
    Posts
    2,490

    Re: Flashback arrestors...do they go bad?

    I just run at the regulators.50 feet of acet hose exploding is kinda neat.
    I like a light handle. Nothing there. These are 12 or so years old. They don't get hot way over there...probably why they stay mint.
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    Last edited by Bonzoo; 09-14-2018 at 07:13 PM.

  11. #11
    Join Date
    Mar 2017
    Location
    bar stool
    Posts
    664

    Re: Flashback arrestors...do they go bad?

    It generally begins with the flashback preventers hanging around with dusty regulators in a dark corner of the shop.
    Then you catch them rolling their own
    Then they get plugged up.

    Saw one open look at the contents and post seeking suggestions on how to MIG them back together.

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