Heating radiator has array of upright cavity wall tubes with gap sealed at ends by beading

摘要

A convection heating radiator has an array of upright tubes with cavity walls formed by concentric pipes. The cavity is the passage for moving hot fluid e.g. water or oil. The gap between the concentric pipes is sealed at the ends by beading of the inner or outer pipe. The beading (8) translates through an angle of more than 90 degrees.