Page 60 - Steam Turbines Design, Applications, and Rerating
P. 60
Turbine Casing and Major Stationary Components 41
Figure 2.14 Welded steam turbine diaphragm assembly
(shroud-band type diaphragm). (Mitsubishi Heavy Indus-
tries, Ltd., Hiroshima, Japan)
The construction is costly by virtue of the extensive manual welding
operation.
Any unit in compliance with applicable standards of the American
Petroleum Institute (API 612) will require use of labyrinth packing for
interstage sealing. The features described below will center around the
use of labyrinth packing:
Figure 2.15 Spoke type diaphragm. (Dresser-Rand Company,
Wellsville, N.Y.)
