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Post by alandlewis on Jan 19, 2007 9:54:30 GMT
I have recently returned to a model stationary steam engine that I started some years ago and now wish to complete. The boiler enclosure requires to be lined with heat resisting material and millboard is suggested. I am finding it hard to source millboard, at least in model engineering quantities. Any suggestions please? The material needs to resist flames from the burner, and not just provide heat insulation.
For those interested in more detail, the model was called Wenceslas and was in Model Engineer November 1990. I started making it about 10 years ago, but got diverted.
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Post by teakfreak on Jan 19, 2007 10:23:50 GMT
Millboard (at least the stuff I have seen - specifically as used in Gresley teak carriages) was made of compressed sawdust and so I don't think it would be good for resisting flames! There is a material called Masterboard that is a modern asbestos board replacement and can be had obtained in ca. 3/16" thick sheets. I think it would probably be OK if exposed to a direct flame, presumably meths or solid fuel tablets so not too intense.
Your local builders merchant should be able to help you with Masterboard, and because it is fairly brittle stuff you may even get lucky and get a piece from a damaged sheet - I doubt if you want an 8 x 4 sheet of the stuff!
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Post by ron on Jan 19, 2007 10:38:02 GMT
Thin millboard used to be made from asbestos so I presume it isn't available nowadays, it might be worth investigating things like exhast wrap from Frost Restorations, it will withstand very high temperatures but it's drawback is it tends to be quite soft unlike millboard which was quite stiff.
Ron
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SteveW
Elder Statesman
Posts: 1,469
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Post by SteveW on Jan 19, 2007 23:27:15 GMT
Alan,
I bought some ceramic cloth from either Chronos or GLR. It's available as either 1mm or 3mm thick. The nearest building supplier source stuff I've identified was a ceramic string/rope used in and around CH boilers. All the other stuff is a hard board and doesn't wrap around a boiler easily.
I think it was around nine quid including P&P for around half a square metre. Our club treasurer's preference was cornflake packets and that's what I found during the club loco's refurbish. Problem was they go all manky after twenty years.
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Post by recurve on Jan 21, 2007 19:09:46 GMT
How about the fireproof matting you can buy from plumbing suppliers to protect paintwork etc when you are using a blow torch on pipework.
Piece I have is about 30cm sq.
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