Co-extruded steam generating bank swaged tubing

Details Co-extruded steam generating bank swaged tubing Co-extruded steam generating bank swaged tubing

F - Mech Eng,Light,Heat,Weapons

22

B

F22B 37/10 (2006.01) F22B 37/04 (2006.01)

Patent

CA 2541589

A method is provided for successfully rolling co-extruded tubing into drums of a boiler bank. First, a co-extruded tube is provided, containing a carbon steel base tubing with an outer layer of high alloy tubing. Next, the outer layer of high alloy tubing is removed by machining in the area of the co-extruded tubing that is to be rolled into the drum. Then, the co-extruded tubing is swaged using multiple swaging steps and annealing treatments. The co-extruded tubing is swaged to the required diameter and wall thickness. Finally, co-extruded tubing is inserted, rolled, and sealed into the drums.

Une méthode est proposée pour enrouler des tubes coextrudés dans les corps de chaudière d'un système de chaudières. La base des tubes coextrudés est faite d'acier ordinaire; la couche extérieure de ces tubes est fortement alliée. Cette couche extérieure est retirée par usinage là où le tube est enroulé dans le corps de la chaudière. Les tubes sont alors matricés en multiples étapes et traités par recuit. Ils sont matricés jusqu'à l'obtention du diamètre et de l'épaisseur souhaités, et sont enfin insérés, enroulés et scellés dans les corps de chaudière.

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