How to fix a collapse titanium exhaust pipe

[Canti]

Hi everyone I'm not sure if this is the right place to ask about this, but I was wondering if its even possible to fix a titanium exhaust pipe after its been collapsed. I attached some pics to explain it a little better.

[mc-motorsports]

ouch! That hurts.

Weld studs to it and try to pull it out, or cut the bad section out and weld a new one in. I would cut and weld, try to get a mandrel bend on the same radius to cut out the replacement piece, would be your best bet.

[ImanCarrot]

Owww! looks like my old GPZ750Turbo after I sent it down the road, actualy managed to buff the end off the crankshaft on that occasion

Thinking along the same lines as above- would it be possible to drill two or three 1/2" holes on the opposite side then stick a 1/2" rod through these to batter the bend out from the inside with a copper hammer?

[Khalid]

Pressurize is with water and it will be come to its original position.

[ImanCarrot]

Be blinking carefull with presurised water... I've seen a water jet cut through 1" slab glass. Flesh, bone and eyes would be nothing to a small, high pressure water jet that leaked (for example) through a pinhole. It's better than pressurised air though, since any catastrophic failure would decrease the pressure instantly since liquids are (essentialy) non- compressible. Pressurised air would go boom with the likelyhood of shrapnel very much a nasty probability.

Just had a thought writing this though... what about filling it with water, sealing both ends and sticking it in the freezer? water is one of the few things that will expand on freezing. Might take a few goes, but a lot safer.

Just a thought outside the box so to speak.

[Geof]

Originally Posted by ImanCarrot ....Just had a thought writing this though... what about filling it with water, sealing both ends and sticking it in the freezer? water is one of the few things that will expand on freezing. Might take a few goes, but a lot safer. Just a thought outside the box so to speak.

Minor detail. How seal ends? Weld cap on?

[ImanCarrot]

Thought about that minor technical hitch... I was thinking that since the transition temperature from water to ice is quite narrow you wouldn't really need a strong seal- you'd get some coming out the ends, but like water in a glass bottle, it wouldn't all come out the end when frozen.. the bottle would break (I think!).

Not an expert, but I'd love to know if it worked!

[Geof]

Originally Posted by ImanCarrot Thought about that minor technical hitch... I was thinking that since the transition temperature from water to ice is quite narrow you wouldn't really need a strong seal- you'd get some coming out the ends, but like water in a glass bottle, it wouldn't all come out the end when frozen.. the bottle would break (I think!). Not an expert, but I'd love to know if it worked!

The liquid-solid transition itself is narrow but water has a maximum density at +4degrees C so from 4 down to 0 it is expanding, and leaking.

The trick is to freeze the ends first forming an ice seal here before freezing the center.

[ImanCarrot]

Much better idea!

[Khalid]

One of our Vessel 11Meter length and 3meter dia buldged due to vacuum..We did it rectify through hydraulic pressure...Hydraulic pressure is much much safer than that of Pneumatic one... No problem at all for such small diameter and length pipe..

[Khalid]

From a pinhole water will not cut you...It will just in the form of spray/mist...

[Canti]

Thanks for replying everyone. All the solutions sounds great, but I need to keep it simple. I don't have much equipment to do most of the things you guys are suggestion. I'm curious in how hard is it to hammer out titanium or use a slide hammer to pop it out?