All 2st Rebuild a pancake pipe?

so with my budget blown out with kids bikes and mine needing numerous replacements my bent and totally abused expansion chamber on the 3 hung needs to be caressed back to shape.
I'm thinking of the air and heat method ... I'm an expert now as I've watched 3 YouTube vids so apprenticeship done online!
Any one tried it and has tips. Between 30-60psi of air then heat with blow torch and hope it pops..
Most of the pipes on u tube were nickel and not steel so is there a difference in heating with the torch?
I don't wanna blow a hole in it but I think it's worth a try.

Duno but if it works il send ya mine for a spare!

if you have a nitrogen bottle use it much safer for you and the pipe

wear your helmet and goggles!

Blank off inflate to 40-50 psi and use oxysettaline blow torch you will be there forever, if no access to oxy use mapp and work in a circular motion start two inches out and keep heating untill it glows red it will start to come then move in, depending on damage you may have splits or pin holes weld them before you start without pressure in.
Its satisfying when done right.

Yeah it'll be a map torch as no access to oxy/ accet.. Also seen peeps using water in the dented area only and freezing with good results until they go a bit far and split it at the seams.
Thinking I might find a smaller dent and try it...
Helmet and goggles ya reaction.. Cricky I might chuck on my NATO webbing and bullet proof vest!!

Setup yer GoPro too please

Never get inline with the end plugs after you put heat to it.

Using an inert gas like nitrogen is a great idea. Burning out the inside of the pipe to remove all left over fuel and spooge is also a great idea. I had a pipe spontaneously ignite once. It basically went off like a small bomb, blew the one end cap right off the pipe before we even knew what happened. Thank goodness we were being careful to avoid being inline with the ends of the pipe while we heated it up and added compressed air when it blew.

The explosion did remove all the dents in the pipe really quickly, so it wasn't all bad.

hahahahaha, glad you were safe

Good advice guys!
It takes a long time to get the heat in with mapp, nitrogen may work what are its expansion properties under heat like?
Air expands more when its hot so the pressure is higher in the pipe probably not by much but it should help a little.

geez jax this is starting to sound pretty full on! film it just in case & you might make it into zoos gruesome photo section

There's a Youtube vid where they burn out the spooge with a heatgun, sounds like a good idea.

We used the oxy acetelyne torch to burn out the left overs in the pipe from then on. Seemed to work pretty good.

Yeah there's a good vid on YouTube where the bung blows off and there's a fire right next to the oxy/accet hoses, gets full on. My oldest lad and I burnt out the carbon when I removed it on Sunday.
Spray a bit of wd40 down the header then ignite as you are spraying flame thrower style and get it burning then gently use air compressor to blow until it gets the carbon glowing then wide open on the air and she looks and sounds like a pulse jet! The kids love it!!
I gotta mate involved as he has pressure bungs and an oxy welder. His wife's an accident and emergency nurse so I'll get her to video. All happening on the weekend.
Never posted a vid... How's it done?

haha...you guys are as red neck down there as we are although around here probably just use gasoline
What are the famous, last words of a red neck?
"watch this!"
Anyway, the only way I know to post a vid is to upload to a host like Youtube, then paste the link into a post here.

As stated above, be careful as my friend has does this heat-up method and the plugs can fly out the pipe at high speed ...

There is also a method adding water inside the pipe and freezing it over night ...

--

NC, I just read out here it's ... "Hold my beer ... Watch this"

I just send my banged, bent and tattered pipes to Pacific Crest Pipe Repair in OR. They are awesome. Pipe comes back looking almost new for like $70. Check them out. www.piperepair.com

I just send my banged, bent and tattered pipes to Pacific Crest Pipe Repair in OR. They are awesome. Pipe comes back looking almost new for like $70. Check them out. www.piperepair.com

Me 2!!

I do it myself if i had to pay $70 everytime i mashed a pipe i wouldnt be allowed out!