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Thread: Where to buy 6mm copper tube?

  1. #1
    levercrema
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    Where to buy 6mm copper tube?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I want to make a new steam arm out of 6mm copper tube. Does anyone know where I can buy true metric 6mm tube? Im sick of idiot plumbing supply companies trying to sell me 1/4 inch tube as 6mm when its 6.4mm >:(.

  2. #2
    A_M
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    Re: Where to buy 6mm copper tube?

    Quote Originally Posted by 50594A594E5F4E59515D3C0 link=1296124499/0#0 date=1296124499
    I want to make a new steam arm out of 6mm copper tube. Does anyone know where I can buy true metric 6mm tube? Im sick of idiot plumbing supply companies trying to sell me 1/4 inch tube as 6mm when its 6.4mm >:(.
    plain copper OR chrom plated ?

    How long ?

    Why not SS

    I would look at one of the places that supply marine products... *A few good places that cater for those who live on and for boats. *Have always found that many things not available elsewhere can be hade at these places... *

    Whitworths and Specialist pipe people such as swagelok (they have 6mm *316L SS Titanium Alloyed Tubing, 6 mm OD x 1.0 mm Wall *or 1.5 mm Wall) also ( Copper Jacketed Tubing, 6 mm OD x 1.0 mm Wall)

  3. #3
    levercrema
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    Re: Where to buy 6mm copper tube?

    Just 6mm copper tube. Not chromed because I can get that done with other stuff and I need to bend it first. Stainless is a good idea except the pipe has to be brazed into brass fittings. Can I do that with stainless?

    And I need to thread the ends for screw-on tips. Copper is easier for this no?

  4. #4
    Mal Dimal's Avatar
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    Re: Where to buy 6mm copper tube?

    Im with AM Doc.... ;)

    SS can be brazed or silver-soldered so long as you use the correct flux. It can also be bent using proper bending tools - No kinks or flat bends. It will also hold a thread better than copper as copper is so soft it is very easy to strip. SS can also be chromed or simply polished to a chrome-like finish - your choice.

    The best place to find the most appropriate tubing, which ever way you decide to go, would be to visit a local industrial refrigeration workshop. They will have hard drawn copper and SS.....

    Mal.

  5. #5
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    Re: Where to buy 6mm copper tube?

    out of interest why does the 6.4 not work ?
    is it the current fittings @ 6mm ?

    edit: just PMed you a link to "polyair" they list 6mm and 6.35mm copper
    they are good to work with as i have bought copper off them :)

  6. #6
    levercrema
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    Re: Where to buy 6mm copper tube?

    Okay - Im starting to like the idea of stainless. This particular application is for a vintage Elektra a leva. I want to use the original fittings which will only accommodate European metric 6mm tube, not 6.35.

    I thought copper because once the brass fittings go on the tube the whole lot gets dipped but if I can use stainless it looks to be a better option. More Elektra restorations on the way.

    Thanks Mal and AM.

    Leeham, thank you for the link.

  7. #7
    Senior Member ozscott's Avatar
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    I saw this thread and through I would refresh it because I need to make up a new group feed pipe from boiler to flow meter on my FAEMA Due. I overtorqued the nut and cracked it... I have a new nut and I will be able to melt the solder from the fitting on the other end and pull that off. I just need 6mm copper tube. I suppose it doesnt matter if its soft drawn or hard...if hard I can anneal it myself using the MAP gun if I understand correctly?

    Is stainless able to have a brass fitting silver soldered onto it?

    Also does anyone know where to source a small length of eithe 6mm OD copper tube or the same size stainess tube in or around Brisbane...everyone wants to sell me 15 metres of the stuff! I need 30cm.

    Cheers

  8. #8
    Senior Member ozscott's Avatar
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    Looks like I can get 1.5m of easy flare copper pipe from the UK delivered for $16 AU...

    Cheers

  9. #9
    Member alexm1's Avatar
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    Ozscott, I bought some years ago at a brake specialist. They usually use steel to avoid the expansion that can occur with copper but those that work on boat trailers in particular usually have copper.
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  10. #10
    rrm
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    Any refrigeration supply company
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  11. #11
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    ozscott,
    Stainless tubing can be either TIG welded (expensive machinery,correct technique demanding though) silver soldered with oxy/acet (easier for most people).
    I recently sourced some insulated 6mm annealed copper piping from refrigeration fitter mate for our caravan fridge installation,just strip away the covering and you have beautiful bright copper.
    I generally use >15% silver rated solder however,lesser percentage work fine too.
    Hope that helps,
    Cheers,
    Mick.
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  12. #12
    Mal Dimal's Avatar
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    Yep...

    Any Refrig. shop should have a lot of short lengths of various sizes Oz,
    It will nearly all be hard drawn copper so will have to anneal before flaring...

    Mal.
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  13. #13
    Senior Member ozscott's Avatar
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    Thanks all. I ended up with soft easy bend 6mm copper from the UK. I rang a few refrigeration places today and they only had 15 metre lengths for $135 plus!. For about $17 Au delivered i got 1.5m which is much better. So i will get the MAP and silver solder out and go to work. Iove keeping the machine running. She is about 30 years old. She is actually due for a full strip and descale.
    Cheers and thanks
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  14. #14
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    Geez, the refrigeration mobs in BNE must be tight bastards, I've never had any drama getting short lengths of copper tubing (soft or hard drawn) from the guys down here at decent prices.

  15. #15
    rrm
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    Quote Originally Posted by jbrewster View Post
    Geez, the refrigeration mobs in BNE must be tight bastards, I've never had any drama getting short lengths of copper tubing (soft or hard drawn) from the guys down here at decent prices.
    The other option is to collar any split system installer. Either at an installation site or at the suppliers. Most would have tails of 1/4 : 1/2 pair coil in their vehicles. However some of the imported copper is absolute junk and crimps while you look at it.

    I's hard to beat the Australian made Kembla .91 wall copper tube.

    6mm Brake bundy tube, from a brake place is OK but it's not copper. It's cupro nickel and heavier wall. Copper is banned from brake use because vibration can work harden the fittings and cause failure.

    l
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  16. #16
    Senior Member ozscott's Avatar
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    Thanks guys. Does Nickel cause any problems for food use?

    Cheers

  17. #17
    rrm
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    No problem according to this:

    http://standards.nsf.org/apps/group_...1/nsf51-97.pdf

    7.3.1 Copper and copper alloys shall not be
    used in a food zone except where exposure to food
    is limited to potable, non-carbonated water under
    constant service pressure. Exceptions to this
    requirement are specified in 7.3.2 for brass and
    bronze and in 7.3.3 for copper-nickel alloys
    7.3.3 Copper-nickel alloys may be used in a food
    zone where exposure to food is clearly and
    specifically limited to non-acidic foods and
    beverages (i.e., food and beverages with a pH of
    6.0 or greater)
    So my reading of the standard is that cupro nickle tube should be OK with water or steam.
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  18. #18
    Senior Member ozscott's Avatar
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    Many thanks mate!

  19. #19
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    How much copper are we taliking here? Surely you're only after a few inches? A foot at most? Any fridgy tradey round here would just dock a bit off a roll and some wouldn't even charge you for it.
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  20. #20
    Senior Member ozscott's Avatar
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    Where to buy 6mm copper tube?

    Yes i agree. I need about 39cm but A. I dont know any fridgies; B. I dont want to roll up and randomly ask one for some; and C. My machine needs a full clean and descale and there are quite a few 6mm runs given it's a volumetric machine with flowmetres x2 so if i need more it's there ready to roll. Funnily enough i an ennealed the butchered piece i had and reflared the top and its in and holding pressure nicely BUT i dont trust the fitting in the long run and prefer to do a fresh piece.

    Thanks for your help.

    Cheers
    Last edited by ozscott; 17th January 2016 at 11:22 PM.

  21. #21
    rrm
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    If you were in Melbourne I'd give a couple of meters. I have an almost full roll of 1/4 soft .91 wall. in the workshop.

    The tyranny of distance.

  22. #22
    Senior Member ozscott's Avatar
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    Behmor Brazen - $249 - Free Freight
    True. Thanks rrm. Cheers



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