MANUFACTURE OF COATING PIPE
PURPOSE: To provide a method to manufacture a clad tube capable of manufacturing the clad tube having a three-layer covered structure with significant adaptability. CONSTITUTION: A method contains a process in which an outer circumferential surface of an inner liner alloy sheath is joined with an in...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE: To provide a method to manufacture a clad tube capable of manufacturing the clad tube having a three-layer covered structure with significant adaptability. CONSTITUTION: A method contains a process in which an outer circumferential surface of an inner liner alloy sheath is joined with an inner circumferential surface of a zirconium sheath, to form a barrier and an inner liner sheath, and a process in which an outer circumferential surface of the zirconium sheath of the barrier and the inner liner sheath is joined with an inner circumferential surface of an outer base layer alloy tube to form a clad tube. Alternatively, this method contains a process in which an outer circumferential surface of the zirconium sheath is joined with an inner circumferential surface of an outer base layer tube alloy tube, to form a base layer tube and a barrier sheath, and a process in which an outer circumferential surface of the inner liner alloy sheath is joined with an inner circumferential surface of the zirconium sheath of the base layer tube and the barrier sheath to form the clad tube. In each case, the next process is performed after the manufactured tube has been heat treated. The joining process and the next process are performed by extrusion and by an arbitrary hot isostatic press. |
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