AN to Hard Line
 

All,

Designing an AN set up for my fuel lines on a carborated 454 on my 72 restomod. My question is can you use an AN to hard line fitting when the steel fuel lines (coming from the tank to the pump) contain a bubble flair? Wondering if the AN hard line fitting would seal up against that flair like it would with the compression ring on a steel line that is not flaired.

Thanks in advance for the assist.

I use a AN to compression fitting on my pump to carb line. (The line is stainless so I went with a swagelok fitting since the stainless doesn't allow the ferules to bite as they do on a normal steel line) With a steel line I'd have used a normal compression fitting / AN without issue, it's not under much pressure but it's a problem if it leaked :)
M

For clarity, the flare my lines have are bump flares that are intended to hold a rubber line securely once clamped. Thinking I may need to cut those in order to install the AN.

For clarity, the flare my lines have are bump flares that are intended to hold a rubber line securely once clamped. Thinking I may need to cut those in order to install the AN.

Weld an AN fitting to the pipe.

:crazy2:

you need a ''an to flare'' fitting,and need to cut/flare the metal line to match the flare on the ''an'' fitting

Why? First word in OP's question is "designing" which tells me he is starting with new parts. So why can't a steel AN fitting be tigged to a steel pipe?

Easiest answer right there, cut off the bead and use a AN / compression fitting.... Keeping in mind the motor moves and you'll need flex between the frame and pump
M

I reread the op first post and I dont see anything about new steel lines. I would suggest if new parts are going to be used get one with AN already on it.

oh I don't know... maybe like this?

btw, you can also get NAPA for almost any -AN fittings as well, the only thing is they are steel for hydraulics on machinery, so that might even be better if you prefer for peace of mine.
But honestly, your not putting 80+ psi on this fitting, you'll be fine.


https://cimg2.ibsrv.net/gimg/www.cor...97ecfc2444.jpg

You can buy Male AN fittings that are bored out on the opposite end that allows tubing to slide inside. You could have 1 brazed on and in the event you decide to go back, just debraze the fitting and your original line is still useable.

https://www.summitracing.com/parts/sum-2200077b

I used these when I installed the Sniper on my 74. Just cut the flares off of the steel line.

https://cimg4.ibsrv.net/gimg/www.cor...f4256f406a.jpg
https://cimg3.ibsrv.net/gimg/www.cor...87995ea9fc.jpg
Use A tube cutter to cut the Bubble flare and insert the appropriate size compression fitting

Several good suggestions here. The easiest (and probably the most expensive) is the compression fitting. But it makes for a 'clean' connection.

Nothing wrong with brazing the connection to steel tube. Just make sure ALL the fuel and vapors are out of it!! No worries with the compression fitting.