Stainless, Problems?

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by Hazmatt, Sep 17, 2009.

  1. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Does anybody know of any reason (aside from cost) why a stainless tank would be a bad idea?
    I rescued some stainless pipe and copper fittings from garbage and was thinkin' of makin' my own tank.
     
  2. bairdco

    bairdco a guy who makes cool bikes

    Joined:
    Aug 18, 2009
    Messages:
    6,377
    Likes Received:
    37
    because it would be so cool someone might steal it...

    stainless is perfect for gas. it resists corrosion and rust better than most anything, and it doesn't need to be painted, gas won't stain it (duh, stainless,) etc...

    the reason you don't see a lot of stainless tanks, is because of what you said, cost. stainless is friggen expensive.

    here's a good link:Stainless Accessories Online | Buy Stainless Steel Gas Tanks
     
    #2 bairdco, Sep 17, 2009
    Last edited: Sep 17, 2009
  3. ratboy

    ratboy New Member

    Joined:
    Sep 15, 2009
    Messages:
    4
    Likes Received:
    0
    most of my fabrication work is done with stainless, its perfect for tanks, and when polished it looks fantastic,give it a go
     
  4. Kevlarr

    Kevlarr New Member

    Joined:
    Jul 22, 2009
    Messages:
    1,628
    Likes Received:
    0
    Probably because in order to weld stainless properly you have to tig weld it. That and the fact that you have to be a darn good metal worker to get a stainless tank to look good, there's no hiding imperfections with filler.
     
  5. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Sweet,
    I am not a good tig welder, but I think I can bribe my co-workers into helping me.
     
  6. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Oooohhh, decision crisis. I just got my hands on an empty, 1 gallon fire extinguisher. I think this just might be my first tank.
     
  7. Rockenstein

    Rockenstein New Member

    Joined:
    Feb 8, 2009
    Messages:
    442
    Likes Received:
    0
    A TIG welder is not a must have for joining stainless! Why is everyone so stuck on electric welders...lol...gas welding is as good now as it was 100 years ago! A set of tanks and torches is sooo much more versatile in the home engineers shop compared to any electric welder.

    You can use O/A or even O/P to join stainless parts...and simply brazing it would likely be fine too.
     
    #7 Rockenstein, Oct 7, 2009
    Last edited: Oct 7, 2009
  8. Elmo

    Elmo New Member

    Joined:
    Sep 3, 2009
    Messages:
    749
    Likes Received:
    0
    Silver brazing (silver solder) worsk well on stainless.
    Elmo
     
  9. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Well,
    I have decided for now to use the Extinguisher tank. I still don't have enough stainless to do what I want.
    The Ext. tank is working out great. I added a filler pipe and a copper air tube.
    I still have to install the fuel line.
    Since I do not have an engine yet, I don't know what size fitting to use. Is it a 1/4" line? or is it some metric tubing size?
    I will post some photos soon (After I clean up my ugly brazing job).
     
  10. BarelyAWake

    BarelyAWake New Member

    Joined:
    Jul 21, 2009
    Messages:
    7,209
    Likes Received:
    5
    it's a 1/4" line or dang well close 'nuff ayup :D
     
  11. silverbear

    silverbear The Boy Who Never Grew Up

    Joined:
    Jul 9, 2009
    Messages:
    8,191
    Likes Received:
    11
    I had the same idea about using an extinguisher tank... an old brass one. I have a bid on one at the moment. I want to use is as a behind the seat tank. What did you use for a filler pipe and cap? How did you join it to the fire X? I'll bed very interested to see your pictures.
    SB
     
  12. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    [​IMG]Okay, So,
    What I did was drill and tap the top of the tank for 3/4" NPT. and 1/2" npt. For the filler pipe I am using a 3/4" rigid conduit nipple threaded into a coupling. I will just thread a conduit cap into this to use as the gas cap. On the other end I'm using a 90 degree brass Swedgelock fitting. It's got 1/2" npt threads and 1/4" pipe compression fitting. This will be the vent. I'm using the same setup on the bottom for the gas line. Because the metal is a little thin, (not much to thread into) I soldered the fittings to the top of the tank as well.
     
    #12 Hazmatt, Oct 10, 2009
    Last edited: Oct 10, 2009
  13. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Close up of the air vent.
    First time I've done any soldering in years, be nice...[​IMG]
     
  14. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    And here is the donor bike,
    Walmart bike saved from dump. I changed out the bars and tires, added the light, and due to cheap components, made it a single speed.[​IMG]
     
    #14 Hazmatt, Oct 10, 2009
    Last edited: Oct 10, 2009
  15. turtle tedd

    turtle tedd Member

    Joined:
    Jul 18, 2009
    Messages:
    153
    Likes Received:
    0
    A stainless steel tank on a motorbike should be TIG welded...it can be "stuck together" by other welding or brazing methods but any small amount of vibration will soon cause these joints to fail...gas be leaking for sure
     
  16. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Well yes,
    The fittings are however threaded in and sealed. The brazing is more of an extra security measure Oh, and the tank is actually not stainless. plain old steel. It will be intresting to be sure.
     
  17. turtle tedd

    turtle tedd Member

    Joined:
    Jul 18, 2009
    Messages:
    153
    Likes Received:
    0
    Hazmat ..sorry man I didn't mean that extinguisher tank your making..I ment stainless tanks......mater of fact I am looking at the fire extinguisher I have got up here on the wall right now..good idea
     
  18. Hazmatt

    Hazmatt New Member

    Joined:
    Sep 15, 2009
    Messages:
    23
    Likes Received:
    0
    Mr. Ted,
    Gotcha man. I am wondering however if vibration will be an issue. I'm going to try making some hard rubber mounts for the tank.
     
  19. turtle tedd

    turtle tedd Member

    Joined:
    Jul 18, 2009
    Messages:
    153
    Likes Received:
    0
    Vibration is always an issue on welded or brazed joints...I wouldn't worry about it to much on a MB...motorcycles yes..ever watch Mikey and his daddy on that chopper show.....no vibration dampeners at all,hardtail frames ....this can be a issue
     

Share This Page