Alternative to Fire bricks

[durhambuilder]

Having just had a new chimney and flue built onto the house I was left with a spare length of chimney liner. We used the Schiedel Isokern system which comprises various diameters of basically pumice tube. It's soft enough to cut with a hand saw and with a few additional bits of vermiculite board all sorts of arrangements can be made. I think it must have cut the heating time by at least a half as well as made everything much more comfortable. The liners are not cheap at about £25 a length but having used it I would not hesitate to go out and buy another length specifically if I had to do a larger boiler. Just make sure you get an inch or so bigger than the boiler barrel to clear any bosses etc.

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[Deleted]

That's a great idea! If only I'd had something like that it might have prevented my Brit boiler seam from failing!
JB

[davebreeze]

Any idea where to get it from? A quick google search gives no clues!

[durhambuilder]

Hmm, my google search on Isokern brings up a fair few suppliers, alternatively most woodburner installers or builders merchants shoule be able to supply.

this is a price list, the plain round liners are on page six.

www.oilstoves.co.uk/webdocs/prices/ISOKERN_Pumice_Retail_Price_List_Jan_2009.PDF

[daveburrage]

I've used a white cotton wool like material. Its used as insulation in pottery kilns and is supplied in sheets. It's very effective. Wrapped round a boiler even at red heat its still cool enough to touch. I recall it was expensive. I think the supplier was www.potclays.co.uk. (on the basis that it's the nearest kiln supplier shown on google to where I remember going).

regards

Dave Burrage

[daveburrage]

This is the stuff

Listed under

Catalogue > Kilns and Accessories > Kiln non electrical other spares eg Bricks, vent plugs, fibre etc

www.potclays.co.uk/ListProducts_239.asp

"ceramic fibre blanket"

regards

Dave Burrage

[davebreeze]

Oct 9, 2010 9:04:54 GMT durhambuilder said:

Hmm, my google search on Isokern brings up a fair few suppliers, alternatively most woodburner installers or builders merchants shoule be able to supply.

this is a price list, the plain round liners are on page six.

www.oilstoves.co.uk/webdocs/prices/ISOKERN_Pumice_Retail_Price_List_Jan_2009.PDF

Thanks for that, bookmarked for when I start my boiler. Incidentally, I did the same google search just now and got a better set of results for some reason.

[cupalloys]

As opposed to a 7m length 610mm wide, this material is also available in smaller more manageable pieces for £6 at exhibitions from CuP Alloys. See www.cupalloys.co.uk

[makmin56]

I've used a somebody textile pelage same touchable. Its used as insulation in clayware kilns and is supplied in sheets. It's real powerful. Wrapped disklike a boiler equal at red change its relieve unemotional enough to impinging.

[daveburrage]

Just revived this thread. I was the guilty man recommending kiln insulation. Worked well but now, starting om my next boiler, its gone into a into a cotton wool powder. Anyone got any more thoughts on insulating boilers during soldering. I've been thinking about using a fire blanket, or using the CUP alloys stuff - although I a bit concerned it might be like the material I've just tried.

regards

Dave Burrage

[durhambuilder]

My Isokern tube is still as good as new and ready for the next boiler