The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-14-2019, 08:05 PM   #1
mick53
Registered User
 
Join Date: Oct 2018
Location: Warsaw IN
Posts: 112
Can I use this for brake line?

On my last project I asked the customer if I could have some scrap Stainless steel tubing for my brake lines on my 53 1/2 ton. They gave me two 200 foot coils. I'm running Wilwood 12.88" disk 4 piston rear and 6 piston front. The writing on the tubing is, Made in Canada, 0.250" XO .035" A ASTM A249 / A209 ASME 5A-249 & BRS-75 TP 304 / 304L HT #SE00444 welded NDE 2018/02/27 22:10
Attached Images
 

Last edited by mick53; 03-14-2019 at 08:06 PM. Reason: sp
mick53 is offline   Reply With Quote
Old 03-14-2019, 09:00 PM   #2
1project2many
Registered User
 
Join Date: Mar 2012
Location: Lakes Region NH
Posts: 2,278
Re: Can I use this for brake line?

Well, that looks like type 304 stainless tubing with .250" OD and .035" wall thickness which according to this chart (if I'm reading it correctly) has a working pressure of 5941 psi. This compares to a mild steel tube of same dimensions which has a working pressure of 3950 psi.

I would say yes, as long as your tools can form and flare the tubing safely, it is acceptable.
1project2many is offline   Reply With Quote
Old 03-14-2019, 09:46 PM   #3
MiraclePieCo
Registered User
 
MiraclePieCo's Avatar
 
Join Date: Sep 2014
Location: OR
Posts: 985
Re: Can I use this for brake line?

I agree, sounds good. SS is harder to flare; guys often go with the 37* single flare instead of the double flare.

https://www.jegs.com/s/tech-articles...s+Steel+Tubing
__________________
1951 Chevy Panel Truck
MiraclePieCo is offline   Reply With Quote
Old 03-14-2019, 10:02 PM   #4
mongocanfly
Senior Member
 
Join Date: May 2015
Location: Alabama
Posts: 7,930
Re: Can I use this for brake line?

I was gonna add it may be hard to do a double invert without splitting the tube....
__________________
Mongo...aka Greg

1981 c30 lq9 nv4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
1955.1 ls3 tr6060...(under construction)(on hold)
2013 gmc z71. (daily driver)
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
mongocanfly is offline   Reply With Quote
Old 03-15-2019, 07:06 AM   #5
1project2many
Registered User
 
Join Date: Mar 2012
Location: Lakes Region NH
Posts: 2,278
Re: Can I use this for brake line?

Quote:
guys often go with the 37* single flare instead of the double flare
I tend to believe the folks who insist double flare or ISO flare is better than single flare for safety reasons. I have seen single flared mild steel tubing which has split in service. While .035" wall stainless is going to be much tougher to flare than .028" wall mild steel brake tubing, it may be possible to create bubble flares and use adapters at each end of a brake line.
1project2many is offline   Reply With Quote
Old 03-15-2019, 07:49 AM   #6
mick53
Registered User
 
Join Date: Oct 2018
Location: Warsaw IN
Posts: 112
Re: Can I use this for brake line?

I have the nice Eastwood flaring set that does 37 deg. and 45 deg. flares. I have a little extra to play with. I guess I'll try a few practice pieces and see what happens.
mick53 is offline   Reply With Quote
Old 03-15-2019, 09:38 AM   #7
mongocanfly
Senior Member
 
Join Date: May 2015
Location: Alabama
Posts: 7,930
Re: Can I use this for brake line?

Good deal....let us know how it works with pics....I've got the Eastwood also...great tool...
__________________
Mongo...aka Greg

1981 c30 lq9 nv4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
1955.1 ls3 tr6060...(under construction)(on hold)
2013 gmc z71. (daily driver)
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
mongocanfly is offline   Reply With Quote
Old 03-20-2019, 05:33 PM   #8
Krustyone
Registered User
 
Join Date: Dec 2017
Location: Mesa az
Posts: 35
Re: Can I use this for brake line?

You'll want to do 37deg single flares with that. Make sure you deburr the ends before flaring to keep it from splitting. Also, It helps the seal to slightly burnish the flare inside if you can with the tool you have. Keep a steady pace on the flaring tool, don't stop and start if you can help it. Stainless work hardens pretty easily. I usually run 3/16 but 1/4 should work as long as your master is sized appropriately. also, make sure the flares seats straight and not cockeyed.
Oh, one more thing, Use steel 37deg AN fitting, NOT aluminum.
Krustyone is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:23 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com