Abstract: A turbine casing has a front casing segment around a turbine longitudinal axis with first and second front casing part-segments, and a rear casing segment, around the longitudinal axis with first and second rear casing part-segments. The rear casing segment is downstream of the front casing segment in the direction of flow and fastened to the front casing segment via a rear vertical flange of the rear casing segment and a front vertical flange of the front casing segment, forming a cross-shaped joint. A protrusion surrounding the longitudinal axis is formed on the front casing segment in a region of the front vertical flange and extends parallel to the longitudinal axis and protrudes from the front vertical flange in the flow direction. A circumferential seal device is on an outer side, facing away from the longitudinal axis, of the protrusion, and seals the protrusion against the rear casing segment.

Abstract: A turbine casing has a front casing segment around a turbine longitudinal axis with first and second front casing part-segments, and a rear casing segment, around the longitudinal axis with first and second rear casing part-segments. The rear casing segment is downstream of the front casing segment in the direction of flow and fastened to the front casing segment via a rear vertical flange of the rear casing segment and a front vertical flange of the front casing segment, forming a cross-shaped joint. A protrusion surrounding the longitudinal axis is formed on the front casing segment in a region of the front vertical flange and extends parallel to the longitudinal axis and protrudes from the front vertical flange in the flow direction. A circumferential seal device is on an outer side, facing away from the longitudinal axis, of the protrusion, and seals the protrusion against the rear casing segment.

Abstract: An exhaust-steam casing for a turbine, the exhaust-steam casing being designed to discharge the exhaust steam of the turbine in a radial direction with respect to a longitudinal axis of a rotor shaft of the turbine and having an upper exhaust-steam casing part and at least one side exhaust-steam casing part. The upper exhaust-steam casing part and/or the side exhaust-steam casing part have a lower exhaust-steam casing part connection surface for connecting the exhaust-steam casing to a lower exhaust-steam casing part. A turbine frame, a turbine casing and an assembly system for a turbine has an exhaust-steam casing.