radiant in ceiling?

gthep

Looking to repair a system One story house with partial basement,. House apparently froze up and busted. I've been in business 27 years and never seen this material before.  I believe it is ferrous metal, 3/8 od, bent in a pattern like copper, no kinks, maybe prefab.  It is installed in a plaster ceiling strapped to the bottom of the joist with thin foil type insulation above.  They said it used to work, don't know how.  Will try to add pics. Any help would be greatly appreciated

Gordy

Bundy weld tubing

http://www.heatinghelp.com/files/articles/1113/99.pdf

Mark Eatherton

Can be soldered...

It has all the same dimensional properties of copper tubing.



If you can find some old petroleum based flux (I've never tried with water based fluxes) and good old 95/5 solder, you should be able to solder repair couplings in place.



I have made a LOT of connections using the above method. I believe Bundy wed was a tin/steel pipe, hence its compatability with conventional soldering techniques. It was introduced to replace copper which had been allocated to the war efforts during the second big one.



ME

RobG

Bundy (Wiki)

Bundy tube, sometimes called Bundy pipe, is type of double-walled low-carbon [u][color=#0066cc]steel[/color][/u] tube manufactured by rolling a copper-coated steel strip through 720 degrees and resistance [u][color=#0066cc]brazing[/color][/u] the overlapped seam in a process called Bundywelding. It may be zinc- or terne- coated for corrosion protection. It is used in automotive [u][color=#0066cc]hydraulic brake lines[/color][/u] in cars manufactured in the USA since the 1930s.

A 1969 study by the [u][color=#0066cc]SAE[/color][/u] recommended the replacement of Bundy tube with 90-10 copper-nickel alloy [u][color=#0066cc]UNS[/color][/u] C70600 (Kunifer pipe) because of corrosion concerns.[u][size=8][color=#0066cc][1][/color][/size][/u] Kunifer pipe has since been adopted by European automakers [u][color=#0066cc]Volvo[/color][/u], [u][color=#0066cc]Rolls-Royce[/color][/u], [u][color=#0066cc]Lotus Cars[/color][/u], [u][color=#0066cc]Aston-Martin[/color][/u], [u][color=#0066cc]Porsche[/color][/u], and [u][color=#0066cc]Audi[/color][/u].[u][size=8][color=#0066cc][2][/color][/size][/u] Bundy pipe retains the advantage higher rigidity, which means less volume expansion under pressure.

The Bundy Tubing Company, started in the USA, was bought in the 1980s by what is now the British company TI Automotive