double or single flare?

[meatonastick]

I'm gong to replace all of the brake lines on my car ('62 fairlane) since they're either original, or at least very rough. My question is whether single flare will be okay, or if I should just stop being lazy and cheap and get the right flare tool? I know double flare are standard for brake and that single flare like to crack, but will that crack just result in a leak or will it result in me slamming into something at speed? eventually i'd like to get stainless line and do it right, so im wondering if a single flare will be okay for "right now" or will I just end up causing problems...

thanks in advance..

[astroracer]

Get CPP's flaring tool and do it right. For 69 dollars this will be the last flaring tool you buy.
http://www.classicperform.com/Store/Tools/CPDFTD.htm
AND, forget about the stainless. Check out the Ni-Cop lines that everyone is using. Much easier to bend and flare and you won't destroy tools trying to flare it. If you use the Ni-Cop now you will be done. Get the line at most any auto parts store.
I am using CPP's flaring tool and Ni-Cop lines in this post.
https://www.pro-touring.com/threads/20086-The-BAD-AST-Project-Faze-II?p=1214889#post1214889
Mark

[meatonastick]

Spending the money and time now is probably a lot better than dealing with it down the road or causing real problems../ That will probably be the tool i end up getting and I will definitely look into the ni-cop line.

thanks again for the help

[astroracer]

Good man, have fun with it. :)
Mark

[Shawn01754]

Double flare all the way. Gives that much more strength. You need to remember, once you start adding power and traction, everything flexes and takes more abuse. If your running a sraight 6. Single flare if you got a v8 be safe and add 1 step. The peiece of mind is worth it

[rjsjea]

Looking for a way to just get by with brake lines.......skimp on something else plz.

[MonzaRacer]

SINGLE FLARE WILL GET YOU SUED IF YOU WRECK. A shop doing brakes can be sued severely if not using double flare. And its just plain lazy , stupid and wrong. If you actually want the math, single flare 3/16 is rated at 890-1150 psi. Properly done a double flare can hold upwards of 9000 psi. Most rubber hoses aare speced at 5000 psi. Oh and to get single to seal on typical inverted flare would require something like 76 ft lbs for 3/8×24 3/16 linedouble flare can seal in the 20-30 ft lbs but generally require less torque. Also the aluminum parts with inverted fitting will be damaged quite easily. Iso or bubble flare takes less to seal as preasure forces the bubble to open as pressure rises thus requring less torque.

[IMPALAMAN1]

Are we talking single 45? With the nut? No way. Or single 37 with a sleeve an nut?

[andrewb70]

Are we talking single 45? With the nut? No way. Or single 37 with a sleeve an nut?

The SAE standard for automotive brakes is 45 degree double flare. Single 45 degree flares are for home and commercial heating and cooling equipment.

Single flare 37 degree is the AN (Army/Navy) standard, and it is also used in industrial hydraulic applications (JIC).

If I was doing brakes from scratch, I would do NiCopp lines and SAE 45 degree double flare fittings when possible. I also don't mind running NiCopp lines with a single 37 degree flare, as long as the fittings are steel and there is a proper sleeve and tube nut.

Andrew

[BonzoHansen]

Any reason that you cannot use nicomp for fuel?

[parsonsj]

Any reason that you cannot use nicomp for fuel? Nope. I use 3/8 Ni-Copp for fuel all the time.

[andrewb70]

Nope. I use 3/8 Ni-Copp for fuel all the time.

Me too...

Andrew

[Jk918]

That CPP tool looks like a good buy for the $

[BonzoHansen]

Nope. I use 3/8 Ni-Copp for fuel all the time.

Thanks