Columbian Chemicals Company

Marvin Skiff

Wallace G Murray

Janek Porowski

David Lewis

A process and apparatus that would hydraulically compress the external sleeve onto the inner APH tube, without deforming the inner surface of the APH tube during the process. The system would include a heating tube of the type having a continuous wall portion and a bore therethrough; a sleeve positionable around the heating tube, the diameter of the sleeve slightly larger than the diameter of the heating tube; a contracting assembly securably atop the end portions of the heating tube and the surrounding sleeve; an insert positionable within the bore of the tube, for defining a protective member along a portion of the inner wall of the tube; a contour ring moveable along the outer surface of the sleeve for compressing the sleeve wall against the tube wall to define a sealable gap between a portion of the sleeve and a portion of the tube. In the process for securing a seal between the heating tube and the surrounding sleeve, there would be provided a heating tube of the type having a continuous wall portion and a bore therethrough; next, positioning a sleeve around the heating tube, the diameter of the sleeve slightly larger than the diameter of the heating tube; then placing a contracting assembly securably atop the end portions of the heating tube and the surrounding sleeve; providing a contour ring along the outer surface of the sleeve, the contour right carried by the contracting assembly; positioning an insert within the bore of the tube, for defining a non-deformable member along a portion of the inner wall of the tube; and then moving the contour ring along the outer wall of the sleeve to compress the sleeve wall against the tube wall at a point opposite the position of the tube insert, for forming a sealable gap between a portion of the sleeve and a portion of the tube.

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El Dorado, AR, United States of America

Marvin Skiff