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Post by justheaven on Nov 10, 2016 10:34:52 GMT
I'm fed up with buying chimneys that corode away in one winter. I thought I'd make one from sheet ali.
My plan was to just bend it round and pop rivet the join. What thickness do people think would be about right?
Note I have no particular metal bending skills or metal bending tools !!
Steve
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Post by Deleted on Nov 10, 2016 10:37:19 GMT
Can I have your boat when you die?
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Post by tonyb on Nov 10, 2016 10:57:20 GMT
If you are burning solid fuel the acidic flue condensation may eat through ally as fast as rust does on steel chimneys. If you do make it please let us know how long it lasts. I think Forumidiot may be living up to his name. I think that he thinks you mean tyo make an aluminium flue, not the chimney. |
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Post by justheaven on Nov 10, 2016 11:05:54 GMT
Can I have your boat when you die? You'll have to speak to our daughter and son in law. They already have their eyes on it for when we're too old and infirm to go boating ! |
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Post by Deleted on Nov 10, 2016 11:06:33 GMT
I chose my name well! Sorry for the misunderstanding.
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Post by justheaven on Nov 10, 2016 11:07:54 GMT
If you are burning solid fuel the acidic flue condensation may eat through ally as fast as rust does on steel chimneys. If you do make it please let us know how long it lasts. I think Forumidiot may be living up to his name. I think that he thinks you mean tyo make an aluminium flue, not the chimney. Presumably painting the inside with something might help to protect it, and so maybe last loger ? |
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Post by smileypete on Nov 10, 2016 11:45:05 GMT
ISTR there are stainless steel ones available which should last OK
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Post by cuthound on Nov 10, 2016 12:30:33 GMT
Yes there is a boat and butty which usually plies it's trade on the Coventry Canal that makes stainless steel chimneys. They both by the name of The Little Chimney Co. www.littlechimneycompany.co.uk |
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Post by Deleted on Nov 10, 2016 13:02:23 GMT
I know someone who made up his own Chinaman's cap using aluminium pop rivets. The rivets just deformed and fell out.
I would definitely go for stainless steel rather than ali for the sheet and there should be no need to have a joint because if it is designed properly it should overlap and "spring out" inside the flue so that it forms a seal.
A fixed cone would be OK but not really needed IMO
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Post by Deleted on Nov 10, 2016 13:07:56 GMT
Sorry I though it was about a Liner. I misunderstood the op. If you have a stsinless steel conical liner you will probably find the actually chimney terminal would last longer even if is steel. I have taken to buying lengths of standard 150mm galv. spiral ducting which if given a 50mm long vertical slit in one side at the end will slot neatly and tightly onto the collar. I've got a 1.5m (external) length due to downdraught problems (tall building beside mooring). I would expect 500mm length to be fine in normal situations. 1.5m was about £15. I bin it at end of fire season and buy a new one. Once its wedged onto the collar it stays there even in high winds. Not very shiny and decorative but very functional and I prefer function over shiny ness myself  |
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Post by larkboy on Nov 17, 2016 8:56:30 GMT
I'm fed up with buying chimneys that corode away in one winter. I thought I'd make one from sheet ali. My plan was to just bend it round and pop rivet the join. What thickness do people think would be about right? Note I have no particular metal bending skills or metal bending tools !! Steve Aluminium will disintegrate in the flue gasses, you do need to use stainless steel, 304 grade being more than adequate. I made mine 4 years ago and all I've had to do is repaint it. I have posted a pic of it on here in a thread about my boat. |
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Post by Gone on Nov 17, 2016 9:00:42 GMT
I'm fed up with buying chimneys that corode away in one winter. I thought I'd make one from sheet ali. My plan was to just bend it round and pop rivet the join. What thickness do people think would be about right? Note I have no particular metal bending skills or metal bending tools !! Steve Aluminium will disintegrate in the flue gasses, you do need to use stainless steel, 304 grade being more than adequate. I made mine 4 years ago and all I've had to do is repaint it. I have posted a pic of it on here in a thread about my boat. Agreed. If the op is still not sure then consider that Ally is much cheaper than stainless, but no one makes an ally flue, they use either coated steel and or thin stainless. |
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Post by bodger on Nov 17, 2016 16:17:54 GMT
you'd be better off going for electric storage heaters.
less to go wrong.
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Post by justheaven on Nov 17, 2016 19:12:24 GMT
Aluminium will disintegrate in the flue gasses, you do need to use stainless steel, 304 grade being more than adequate. I made mine 4 years ago and all I've had to do is repaint it. I have posted a pic of it on here in a thread about my boat. Agreed. If the op is still not sure then consider that Ally is much cheaper than stainless, but no one makes an ally flue, they use either coated steel and or thin stainless. I've bought some stainless tube, hoping to adapt that into a chimney. |
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Post by larkboy on Nov 17, 2016 21:39:01 GMT
Agreed. If the op is still not sure then consider that Ally is much cheaper than stainless, but no one makes an ally flue, they use either coated steel and or thin stainless. I've bought some stainless tube, hoping to adapt that into a chimney. It probably is of no help to you, but I developed the frustums for my chimney and still have the patterns at work.... I'm on the River Lark, nearest well known places are Cambridge or Ely if you're interested.  |
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