The present document discloses a port flange for a heat exchanger. The port flange comprises a heat exchanger mounting portion (83), for connection to a heat exchanger plate, a system interface portion (82), comprising a flange for connection to a system that is to supply or receive a medium to/from the heat exchanger, and a port channel (84), for connecting an opening in the system interface portion to the heat exchanger mounting portion. At least part of the port channel (84) is formed from a first piece of material (86), the flange is formed of a second piece of material (82), and the first piece of material is permanently joined to the second piece of material
