Abstract: A tube header for a heat exchanger includes a header plate having two major dimensions defining a header plane. The header plate has a row of oblong passages extending through the header plate, and a plurality of tie bars. Each tie bar is arranged between a pair of adjacent oblong passages. At least one of the tie bars is a support tie bar with a generally W-shaped support tie bar profile in a cross-section across the row of oblong passages. The support tie bar has a center area forming a plateau surface parallel to the header plane and connecting two generally V-shaped portions of the support tie bar profile. The plateau surface supports an internal header baffle extending perpendicular to the header plane.

Abstract: A tube header for a heat exchanger includes a header plate having two major dimensions defining a header plane. The header plate has a row of oblong passages extending through the header plate. Each passage is bordered by a ferrule monolithically formed with the header plate. The ferrule has a surrounding wall extending perpendicular to the header plane. A transitional area between the ferrule and the header plate has a reduced thickness that is smaller than the wall thickness of the ferrule. This transitional area provides a flexible hinge-like function for compensating dimensional changes during thermal cycles of a heat exchanger.

Abstract: A tube header for a heat exchanger includes a header plate having two major dimensions defining a header plane. The header plate has a row of oblong passages extending through the header plate, and a plurality of tie bars. Each tie bar is arranged between a pair of adjacent oblong passages. At least one of the tie bars is a support tie bar with a generally W-shaped support tie bar profile in a cross-section across the row of oblong passages. The support tie bar has a center area forming a plateau surface parallel to the header plane and connecting two generally V-shaped portions of the support tie bar profile. The plateau surface supports an internal header baffle extending perpendicular to the header plane.

Abstract: A tube header for a heat exchanger includes a header plate having two major dimensions defining a header plane. The header plate has a row of oblong passages extending through the header plate. Each passage is bordered by a ferrule monolithically formed with the header plate. The ferrule has a surrounding wall extending perpendicular to the header plane. A transitional area between the ferrule and the header plate has a reduced thickness that is smaller than the wall thickness of the ferrule. This transitional area provides a flexible hinge-like function for compensating dimensional changes during thermal cycles of a heat exchanger.