Bubble Flare
 

I recently bought a tube flaring kit for three different types of tubing flares. I know how to do flares on Copper tubing , Double flares on Brake lines but i've never heard the word Bubble Flare used or where they're used. My question is where are they used? and what kind of tubing are they used on?

Thanks Kenney Kelley

Re: Bubble Flare
 

Re: Bubble Flare
 

Bubble flare is very common on todays automobiles, You mostly see it on 3/16 brake line

Re: Bubble Flare
 

basically a double flare and not doing second step

Re: Bubble Flare
 

Bubble flares are used on brake lines

Re: Bubble Flare
 

Thanks to everyone who answered my question. I knew the Bubble Flare was different from the others because it required a different flaring cone all together and i had never seen one so that's the reason why I asked. Once again thanks for the response.

Kenney Kelley

Re: Bubble Flare
 

I’m never to old to learn. Thanks everyone

Re: Bubble Flare
 

A bit late but a bubble flare is a European standard and not common on US cars. Not sure its road legal in this country. Inverted double flare is stronger. Always match flares and fittings. Here's a chart.


https://www.mpbrakes.com/images/MPB-F200-22.pdf

Re: Bubble Flare
 

A word of caution.
If you are using a bubble flare, make sure the mating components are designed for a bubble flare. The flare has a different shape and will not fit into double flare connections. You cannot connect a bubble flare to a double flare seat.

They have a built in crush surface which means that the flare can not be reused. You also can not connect a bubble flare to a double flare seat.

Re: Bubble Flare
 

They've been around for a while on European cars at least. I'm working on an '81 Porsche 911, its brake system has all bubble flares.