Composite tubular woven seal for steam turbine diaphragm horizontal joint interfaces

A steam turbine comprising:

• a rotor including a plurality of circumferentially spaced buckets;
• an outer shell surrounding said rotor;
• an inner casing within said outer shell and including upper and lower diaphragms carrying a plurality of stator blades forming with said buckets a stage of the turbine in part defining a steam flowpath through the turbines, said upper and lower diaphragms adjoining one another along a horizontal joint midline and having registering flanges at the joint midline and grooves in the flanges in registration with one another, said grooves disposed radially outwardly of the flowpath;
• and
• a compliant seal partially disposed in each of the registering grooves including a seal body formed of multiple layers of different materials for compliantly sealing the registering flanges of the upper and lower diaphragms to one another along the horizontal joint midline.