Process for continuous production of longitudinally welded metal tubing
AssigneeNexans
InventorsChristian Frohne, Klaus Porcher
Life of this patent
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Abstract
In a process for continuous production of longitudinally welded metal tubing, in which a metal strip is withdrawn from a strip supply, gradually shaped into a tubing with an open longitudinal slit, and the longitudinal slit is sealed by soldering or welding, a lubricant is introduced into the open slit tubing before sealing.
Claims6
A method for continuous production of longitudinally welded metal tubing, in which a metal strip is withdrawn from a strip supply, gradually shaped into tubing with an open longitudinal slit, and the longitudinal slit is sealed by soldering or by welding at a welding point, said method further including the step of introducing a lubricant into the open slit tubing, wherein the welded tubing is wound into a bundled coil or onto a reel, and further wherein the lubricant is introduced into the open slit tubing in such an amount that the entire inner surface of the metal tubing is coated with lubricant after the tubing is wound up.
A method for continuous production of longitudinally welded metal tubing, in which a metal strip is withdrawn from a strip supply, gradually shaped into tubing with an open longitudinal slit, and the longitudinal slit is sealed by soldering or by welding at a welding point, said method further including the step of introducing a lubricant into the open slit tubing, wherein the lubricant is introduced into the metal tubing by means of a lance behind the welding point.
Dependencies are inferred from the claim text.