Heating system exhaust silencer

摘要

The inner tube (13) is integral with the unions (16, 17) and the end walls (14, 15) are a press-fit on it. There can be protruding external peripheral ribs on the inner tube at the points where the walls are mounted.The press-fit can be formed by a beaded edge protruding at right angles from the surface of each end wall and which bears against the rib on the tube. The walls can be joined to each other via the outer tube (11), no other material being used.