Page 1 of 2 12 LastLast
Results 1 to 13 of 17
  1. #1
    Join Date
    May 2008
    Posts
    12

    connecting copper

    This is going to sound off the wall ,but from reading post on brazing ,soldering ,connecting copper lines .Reading the problems that may be caused by improper brazing,ext, . Why isn't the practice of using double flare connectors used instead ? Seems to me that that would take the guess work out of contaminating and handle vibration leaks . Just my 2 cents .

  2. #2
    Join Date
    Jan 2004
    Location
    New Jersey
    Posts
    534
    You will be told to follow mfgs install instructions. IMO, flare fittings done correctly work very well.

  3. #3
    Join Date
    May 2008
    Posts
    12
    Quote Originally Posted by fastfred View Post
    You will be told to follow mfgs install instructions. IMO, flare fit
    tings done correctly work very well.
    I am not associated with your industry .but have been a cert.master mechanic on heavy equipment for 40 years .I work on a lot of hydraulic systems that carry very high pressures ,one type pressure system is a closed loop ,meaning that when it is called into operation the pressure hits like a sledge hammer.The fittings almost never fail , they maintain their integrity on occasions when the pressure will blow a triple ,wire braided hose wide open. Also on our air condition units they go through extreme vibration and run under very high heat situations(compressor sits beside of a screaming ,scalding hot diesel engine) and long runs of hoes up to the cab.The a/c's use only fittings also .Anyway I think that fittings would be a big improvement form my state on mind..Thanks for listening

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,717
    Flares work.

    Double flaring 7/8" could be a bite.
    In your industry, how many flares do you do a day, 5 days a week.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    Jan 2008
    Location
    Boaz, AL
    Posts
    52
    All the mini-split systems I've installed have flare connections

  6. #6
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,704
    back in the day units were all flare fittings.


    brazed connections are MUCH better.


    never saw double flares on a/c units but i don't think it would help.
    biggest problem was expansion and contraction of different types of metal would loosen the fittings.

  7. #7
    Join Date
    Apr 2008
    Location
    Alberta Canada
    Posts
    2,246

    We use to flare

    [QUOTE=GERMAN;1866385]I am not associated with your industry .



    We use to use Double flare but now the industry just decided to go brazen. keeprite use to have precharged linesets with flare ends on them in 1980s.
    Do it right the first time.

  8. #8
    Join Date
    Oct 2007
    Location
    Southern Indiana
    Posts
    94
    There are two types of flares:
    1. A flare that leaks
    2. A flare that is going to leak!

  9. #9
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    Quote Originally Posted by GOVHVAC View Post
    There are two types of flares:
    1. A flare that leaks
    2. A flare that is going to leak!

    you forgot 2 more ways you did not mention

    3. a flare that is not done properly
    4. a flare that is done properly

    read very carefully;

    a flare done properly can outlast a brazed joint done improperly

    a flare joint done improperly wont outlast a brazed joint done properly

    if you have a flare joint done properly and a brazed joint done properly either may fail first

    shall i go on



    .

  10. #10
    Join Date
    May 2008
    Posts
    12
    I have not seen a problem with double flares leaking, when properly done and tightened. and that's with equipment that takes terrible abuse. How many times do you see a line on your automobile brake system leak at the fitting ? They are double flare .But like I said this is from my experience and just friendly conversation. And yes I am willing to flare as many lines as my job pays for , but if we are at the shop we do have a hydraulic flare crimp machine that is time saver. Thanks for joining in.

  11. #11
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,717
    I realize that your flares take as much, and maybe more extreme temps.
    Ours only have to with stand -30 to 135*F temps, and less then 600 PSIG.

    Lots of small refrigeration units use flare.

    As airmechanical pointed out. Either done wrong won't last.
    If a guy isn't going to take time to braze propery, he isn't going to take time to double flare properly either.

    Long story short. If your worried about your contractor not using proper brazing procedure, you hired the wrong contractor.

    Unfortunately, what the salesman promises, and what the installer delivers, is quiet often 2 different things. And, if it isn't written in the contract, the salesman never agreed to it.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  12. #12
    Join Date
    Nov 2003
    Posts
    100
    What do they use in aircraft hydraulic control connections, braze, double flare or something better than either?

  13. #13
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,717
    Flare I believe. Use to know a couple mechanics.
    Of course, air craft is usually maintained much better then your average A/C.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event