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Thread: Rusted bolts

  1. #1
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    Rusted bolts

    I have a coworker in a mission to replace about 50 stainless nuts n bolts on like a couple of 10" PVC flange. The old steel rusted bolts r about 5 years old m rusted out good he said he can't flip out the old nuts, Amy recommmendatiom

  2. #2
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    It is going to sound crazy but after soaking with WD-40/PB Blaster/Liquid Wrench try to tighten the heads just a little bit to break them loose. You can also spend about 2-3 minutes tapping each bolt with a hammer before turning them. I know tightening is the exact opposite of your objective but after soaking, then tapping, it frequently works.

    If all that fails there is always the torch...

    Good Luck!

    Ken

  3. #3
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    I'm having a hard time understanding exactly what is going on, here.

    Is he able to loosen the bolt and remove it? Is the nut the problem?

    By "flip out the old nuts" do you mean that they are some sort of captive system that holds the nuts in place?

    Pictures would go a long way to clarifying if possible.


    I'm on board with a good soak-down with aerokroil and a couple of good taps with a hammer. That'll loosen the rust up good.


    If you've got some sort of captive system holding the nut, you may be into drilling and using an easy-out to pull the nuts out.

  4. #4
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    I've never seen stainless nuts and bolts rusted so bad that they couldn't be taken apart. If they're plain old grade 2 steel nuts and bolts like are used everywhere, I'd skip the oil and go right to a grinder with a cutoff wheel. That'll make short work of those things without melting the PVC flange.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  5. #5
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    They make a tool called a nut cracker. If you have the room you can use this tool to split the nuts. That will most certainly assist in loosening them.
    Probably NAPA has the tool.

    Quote Originally Posted by anthonyac1 View Post
    I have a coworker in a mission to replace about 50 stainless nuts n bolts on like a couple of 10" PVC flange. The old steel rusted bolts r about 5 years old m rusted out good he said he can't flip out the old nuts, Amy recommmendatiom

  6. #6
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    Quote Originally Posted by Tech Rob View Post
    I've never seen stainless nuts and bolts rusted so bad that they couldn't be taken apart. If they're plain old grade 2 steel nuts and bolts like are used everywhere, I'd skip the oil and go right to a grinder with a cutoff wheel. That'll make short work of those things without melting the PVC flange.
    That's what's I wa thinking too.

  7. #7
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    Sounds like he has steel now and replacing with stainless. I'm with the guys on a good soaking with Kroil. Let it soak a while and do its thing. I like a 1/2" impact to prevent snapping rusted bolts. Good luck. Also seen PVC flange so I would not put a smoke wrench on it.

  8. #8
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    Quote Originally Posted by Tech Rob View Post
    I've never seen stainless nuts and bolts rusted so bad that they couldn't be taken apart. If they're plain old grade 2 steel nuts and bolts like are used everywhere, I'd skip the oil and go right to a grinder with a cutoff wheel. That'll make short work of those things without melting the PVC flange.
    I like this too

  9. #9
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    Doh! PVC flange...forget the torch. Missed that detail.

  10. #10
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    Quote Originally Posted by Tommy knocker View Post
    I like this too
    if you have room to do this this is the best!!! dont even think about anything else...I had a tech work on a 8 in flange..I was not there,,,i think he tapped to hard and was messing with the bolts,,,,the pipe was an old condensor loop...cracked the flange...hair line crack....what a mess....

  11. #11
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    Quote Originally Posted by dlove View Post
    if you have room to do this this is the best!!! dont even think about anything else...I had a tech work on a 8 in flange..I was not there,,,i think he tapped to hard and was messing with the bolts,,,,the pipe was an old condensor loop...cracked the flange...hair line crack....what a mess....
    Hopefully its valves out, the flange, before he starts doing ANYTHING to it. Nothing like a 5" column of fluid getting loose to get the adrenalin going.

  12. #12
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    Sep 2010
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    hey guys. sorry for the confuseing post i was beat after work i knocked out while writing it but to clear it all up. the original contractor used steel bolts so they are rusted out beyond anything so one of our techs has to remove the bolts and replace them with stainless steel bolts. you cannot tremove the nut so he just grinds off the nut, so now you have the hex head with the shaft of the bolt still in the flange it wont budge some slide out after tapping them and soaking them but others wont budge. today i spoke with him he said with the grinder he cut a fine slit in the edge of the flange and lightly pry it open while tapping them out. i guess thats working for him. i was curious to see what others do in this case.

  13. #13
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    Jul 2009
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    Try a spud wrench to pry the flanges after you get a bolt out. http://toolmonger.com/2012/02/23/its-a-spud-wrench/

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