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Thread: Welding Copper Tube
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15th Jan 2006, 10:46 PM #16
am glad that you decided to silver solder the boiler. I've been in the metalwork industry for 20 years as a fitter & turner, fitter/welder and pressure vessel welder.
have yet to come across any welder who uses tig for copper they all silver solder it. its hard enough getting a perfect tig weld on stainless for use with low pressure's let alone trying to weld copper.
good luck with the boiler look forward to seeing a pic when you are finished
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16th Jan 2006, 10:32 PM #17
Hey another update. I've still been busy and I am going away on holiday so unfortunately the boiler alone could be weeks away . When you say to soak in a weak acid bath, what type of acid? Can I water down Hydrochloric (we have it for our pool) or do I need some specialty stuff?
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30th Jan 2006, 05:20 PM #18
Please answer my acid question if you are here. Anyway, I got back from holidays and I still haven't done more work on the boiler, but I here are the original photos (It obviously needs further cleaning/polishing):
The chimney goes up and through and is sealed, another ring will go around the bottom covering the bottom of the chimney where the burner will go. The overhang is to stop the flames licking around the sides ruining the tarnish. The third picture is a cross-section diagram I drew in paint in 3 seconds.
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30th Jan 2006, 09:27 PM #19
Pickle acid solution for copper
Hi Edd,
The silver brazing effort looks good from what I can see in your photos.Well done mate ! If your were one of my students you would get an A. Good stuff!
Not having experince in pickling myself, I googled up the following for you.
http://www.lucasmilhaupt.com/htmdocs...ons_chart.html
The info mentions a sulphuric acid solution.I fear your hydrochloic acid may be too severe on copper.I have not had time to go through the sit but it looks interesting enough to add to my Favourites List.
Keep up the good work.I will copy your photos to show some of my students just what can be done when someone is interested enough to learn and take advice.
again
well done.
Grahame
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31st Jan 2006, 01:05 PM #20
Thanks Grahame!
I don't know how much time I will have (school's back tomorrow), but when I get it finished I will polish it up and take some better photos that are much larger.
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31st Jan 2006, 01:36 PM #21
Good ONE!!
Originally Posted by Edd
Joking!!!!!!
Well done,
Been following for a while.
Cannot get REALLY High quality Welders out in the workforce much any more.
I'm at a Coal Fired Power station.
I work with BIG Boilers every day
SCARRY what they can do when they let loose.:eek: :eek:Navvi
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31st Jan 2006, 08:57 PM #22Originally Posted by Ivan in Oz
I worked with steam boilers and generators for about 6 years before I woke up to myself and I could not agree more. Boilers can be very dangerous, even little ones like Edd has made. I worked at Loy Yang B installing a commissioning boiler for the big banger. To say that they are big is a serious understatement. I would hate for a seam to let go on one of them...:eek:
DanIs there anything easier done than said?- Stacky. The bottom pub, Cobram.
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22nd Feb 2006, 02:10 PM #23New Member
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Edd, you have had 3 weeks, progress please
Edd,
I am sure I am not alone waiting to see the finished steam engine. There is something about steam engines that internal combustions don't have. I have heard it described that a steam engine is almost a living thing.
Anyway, we are patiently waiting.
Jon
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11th Oct 2006, 03:39 PM #24
I'm sure you've all assumed I have given up or something. I haven't, just moving very slowly... Anyway, I have some pictures:
Picture 1:
-A stainless steel piston. I am quite proud of this turning job. As you can see, it's very small (see 10c coin).
Picture 2:
-Left: A steel flywheel
-Right: Crank wheel, just need a hole drilled and a pin pressed in.
Picture 3:
-Complete boiler with firebox (coated in heat/flame proof automotive paint).
Not Pictured, but complete:
-Cylinder + portblock
-Portface + engine stand
Things yet to complete:
- Engine stand bearing(s)
- Base
- Burner
- Drilling of cylinder ports
- Various minor assembly hardware (crankshaft, crankpin, etc)
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11th Oct 2006, 03:45 PM #25New Member
- Join Date
- Jul 2002
- Location
- Blacktown, Western Sydney
- Age
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nice work Edd
Jon
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