Abstract: A flexible tube terminating means comprising a fitting connected around the end portion of a flexible tube and having a shoulder for engagement by an annular threaded coupling member located around the tube. The fitting is formed by one member which engages the end of the tube and holds a second member in place while both members are brazed together and to the tube by solder located in an annular cavity formed between the two members and around the tube.
Abstract: A bimetallic tube comprising a copper-base alloy and a reactive metal such as titanium, is produced by assembling concentrically a tubular member of each of such materials and interposing a layer of copper, nickel or silver between them, forming a bond between the reactive metal and the copper, nickel or silver and extruding the assembly. The bimetallic tube is useful for heat exchange purposes when corrosive fluids are involved and has better heat transfer properties than an all-reactive metal tube.