Model Boat Mayhem
Technical, Techniques, Hints, and Tips => Engineering Techniques and Materials. => Topic started by: oiler on August 23, 2008, 03:44:02 pm
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I've searched high and low for a week now. Does anyone know where one can find 50mm copper tubing or pipe? I'm trying to increase the size of my condenser and it specs out to be 50mm outside. Wish the whole world would either go imperial or metric because it sure would make life easier.
Thanks for you time
Chad
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You might have a problem here as metric copper tube is 54mm outside diameter O0
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Is that coz they are working to the nearest inch.
I am not being difficult here. But I cannot by 2m of timber. But I can buy 1.8m lengths, as they work to the nearest foot, honest. :angel:
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if its for a condenser for steam size is not critical MHB used something like 25mm x 75 mm and they where horizontal ,Cheddar had all sorts of dia vertical and Hemmins has all sorts of sizes and shapes the main thing is the in and out and drain are in the right position. and the lines to and from are horizontal without U bends , you can help them work by passing the feed from engine to tank through any water tanks for boiler feed , warms water cools steam.
Proteus
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Is that coz they are working to the nearest inch.
I am not being difficult here. But I cannot by 2m of timber. But I can buy 1.8m lengths, as they work to the nearest foot, honest. :angel:
Not quite tt. 2" copper is a different diameter to 50mm and 1.8 metres isn't 6 foot. O0
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Is that coz they are working to the nearest inch.
I am not being difficult here. But I cannot by 2m of timber. But I can buy 1.8m lengths, as they work to the nearest foot, honest. :angel:
Not quite tt. 2" copper is a different diameter to 50mm and 1.8 metres isn't 6 foot. O0
1.8 IS to the nearest foot. ::)
54 is also close to 2" and maybe nearest to 2" than other 'standard' sizes of copper tube used in the olden days. When I were a boy.
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I've got a piece 51mm dia (OD) if thats any use, if it is, PM me your address and let me know the lenght and I will stick it in the post (unless you're going to Llanberis, then I can deliver O0)
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hi all
I was lead to believe that all pipe was measured and graded by internal bore - so 2 inch pipe was in actual fact 2 inches bore plus the thickness of the pipe - so, therefore if someone has 54mm I/D pipe we will take it that it is 50mm bore; allowing 2mm per side for wall thickness, which, would be about right. So, in my books that is roughly 2 inch bore or 2 inch copper pipe.
aye
john e
bluebird
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So whats your point John ? :-\
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Well, Dicky, you always measure pipe diameter by the bore, unless it is high pressure hydraulic pipe.......
john
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But Mr Oiler wanted 50mm o/s diameter. :angel:
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I've got a piece 51mm dia (OD) if thats any use, if it is, PM me your address and let me know the lenght and I will stick it in the post (unless you're going to Llanberis, then I can deliver O0)
Oh I think that would work very nice!
I'm looking to extend mine and want to lag it with mahogany as well. Only need 2" of it actually. I can't find 50mm anywhere.. I don't know how John made it with 50mm. I'd ask him but he told me he's on a nice long holiday.
thank you for all the replies guys O0
love this forum!
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Just out of interest why do you want to make it bigger.? you should get a few hours out of a 2" dia condenser, and they only take a few seconds to blow one out after a run.
If you extend the tank you will have to extend the empty tube, its prob quicker to make a new one than modify one.
Proteus
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Wish the whole world would either go imperial or metric because it sure would make life easier.
Thanks for you time
Chad
So, you need 2" of 50mm eh!. ::)
You could always have a trawl through the local Scrapyard. O0
Regards,
Len.
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hi all
fridge pipe is measured in imperial still , the measurement is the o/d size.
you can get all different type of fittings eg end caps ,reduces (bell shape) from most control centre /Nrs or nrw
cheers spud
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Just out of interest why do you want to make it bigger.? you should get a few hours out of a 2" dia condenser, and they only take a few seconds to blow one out after a run.
If you extend the tank you will have to extend the empty tube, its prob quicker to make a new one than modify one.
Proteus
Well not really. If I extend it 2" then it'll increase it by almost twice the amount. The condenser is inside the ship and won't be easy to get at when the ships in the water. I figured it would be easier to just run longer and not have to take the boat in and out of the water every 20 minutes. Making a whole new one would mean I would have to redo all of the connections to it as opposed to just soldering two joints.
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Ain't you lucky - in Taiwan you would get the 50mm diameter but the two inches would be local inches, which are defined as 1/33 of a metre. There are about 10 inches to our foot. :o
Of course they would sell the copper by weight, in Kg. Easy until you realise that a Taiwan Kg is only 600 grammes in our measure.
I haven't yet dared to ask for a 1/2 inch drill bit so I stick with mm for everything.
It's possible to adopt world standard names for the measures, then modify or corrupt them to the point of meaningless.
Cheers,
Geoff
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Have you seen this item?
http://cgi.ebay.co.uk/2-pieces-Hard-drawn-copper-tube-Live-steam-no-dinges_W0QQitemZ160278197799QQcmdZViewItem?hash=item160278197799&_trkparms=72%3A12%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14