| http://www.w3.org/ns/prov#value | - The perimeter of the tube sheet can be attached to the inner surface of the inner shell 30 by any suitable known means including brazing and welding. [0055] As shown in FIG. 1, the primary inner shell 30 may be formed with an inwardly extending circumferential ???lip??? 59, or other inwardly extending indentation(s), such as dimples, to correctly locate the first tube sheet 58 relative to the prim
|
