Flue ducting for atmospheric boilers

Details Flue ducting for atmospheric boilers Flue ducting for atmospheric boilers

F - Mech Eng,Light,Heat,Weapons

23

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F23J 13/00 (2006.01) F16L 9/18 (2006.01) F16L 11/15 (2006.01) F16L 11/20 (2006.01) F16L 59/06 (2006.01) F23J 11/12 (2006.01) F23J 13/02 (2006.01)

Patent

CA 2270332

A flue ducting for atmospheric boilers is disclosed and comprises two coaxial generally tubular ducts, and a generally undulating linear spacer between the ducts. Linear features are provided on the mutually facing surfaces of the ducts, the features being shaped to engage the undulating spacer. One end of the annular space between the ducts is closed.

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