Multi-segmented tube sheet

The tube sheet construction of claim 18 including a securing piece constructed and arranged about the tubular shaft of the elongated tubular element and spaced below the flanged top end of the elongated tubular element, said securing piece for engagement with the tubular shaft to provide a compressive force against the tube sheet segments that are disposed between the flanged top end of the elongated tubular element and the securing piece.

(canceled)

(canceled)

The tube sheet construction of claim 18 wherein the flanged top end of the elongated tubular element is recessed in one of the adjacently disposed tube sheet segments.

The tube sheet construction of claim 18 wherein the flange top end of the elongated tubular element is positioned resting directly on a top surface of one of the adjacently disposed tube sheet segments.

A tube sheet construction that includes a tube sheet and a plurality of elongated tubular elements supported by the tube sheet, said tube sheet comprised of a plurality of separate planar tube sheet segments, multiple holes being provided in each planar tube sheet segment in a predetermined pattern, each hole for accommodating one of the plurality of elongated tubular elements, all of the tube sheet segments being aligning so that the hole pattern of each segment aligns with the hole pattern in all other segments, each said elongated tubular element having a flanged top end and a contiguous tubular shaft with the flanged top end having a diameter greater than a diameter of the tubular shaft, wherein the flanged top end of a first elongated tubular element is disposed between a first pair of adjacently disposed tube sheet segments, and the flanged top end of a second elongated tubular element is disposed between a second pair of adjacently disposed tube sheet segments that is different than the first pair of adjacently disposed tube sheet segments.

19-23. (canceled)