Brake Lines - Steel vs Copper vs Copper-Nickel

[Fireblade69]

Whilst trying to change rubber pipes for braided lines on my track car I've managed to mangle a solid to rubber union, (yes I did use a brake pipe spanner!), and now the pipe has to be replaced. It's one of the fronts and it is clipped to the bulkhead behine the damned engine so is bloody hard to get to for a steel replacement as they tend to be a bit inflexible. I'd also have to get one prepared & supplied ready to go and was wondering on doing a copper replacement but heard that copper-nickel are as flexible and have a higher burst pressure.

Anyone have any advice/suggestions as to whether copper is fine, copper-nickel is great or whether the steel lines are a must?

[tr7v8]

I've always used Copper as replacements. The burst pressure is much higher than you'll ever see anyway. Never had a problem.

[Classic Grad 98]

Kunifer (copper nickel). Resistance to fatigue and corrosion.

[Mr2Mike]

Classic Grad 98 said:

Kunifer (copper nickel). Resistance to fatigue and corrosion.

Cupro-nickel lines (such as Kunifer) are the way to go for DIY for the above reasons. A little harder to form flares than copper lines, but doesn't work harden anything like the extent that copper does.

[kev b]

If you know anyone local with a brake pipe tool you might be able to cut off the formed end, slide on a new union and make a new flare in situ.It's a bit of a faff but easier than removing the old and fitting a new line. If not, Kunifer is the pipe to use, I don't know of any garage not using it.

[Fireblade69]

Cheers guys. I know a guy with a flaring kit suitable for steel but it's vise mounted and he reckon's it can't be used under the wheel arch as it's a pain in the arse. I might invest in one of the more cost effective versions available and go for that Cunifer. Can't see me using it too much anyway.

[stevieturbo]

Kunifer is the best option. The soft copper stuff places sell is just crap.

Sykes sell a great portable crimper that doesnt cost the earth anymore.

Shop around, but this is a decent price, and it is a proper tool

http://www.uktools.com/flaremaster2-brake-pipe-fla...

[chimaeras]

Kunifer is the way to go . To do the job properly you must support the pipe every 12 inches,this is very important.