F - Mech Eng,Light,Heat,Weapons – 22 – B
Patent
F - Mech Eng,Light,Heat,Weapons
22
B
122/67
F22B 9/18 (2006.01) F24H 9/00 (2006.01)
Patent
CA 1112963
A B S T R A C T A fire tube for a heating boiler comprises two substantially U- shaped tube halves of sheet metal which are welded together at the abutting edges of their profile arms. These arms extend at an angle from the profile base. A plurality of substantially L-shaped sheet-metal strips extend in the longitudinal direction of the fire tube. Each strip is located on and attached to the inside surface of the profile base of one tube half. One L-arm of each strip extends almost to the opposite profile base of the other tube half. The other L-arm of the strip faces another corresponding L-arm and is connected to the profile base of the tube half by a common welding seam at adjacent edges of the two facing L-arms.
315971
Fetherstonhaugh & Co.
Interliz Anstalt
LandOfFree
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