Plate heat exchanger

A plate heat exchanger comprising

• a plate package having a plurality of heat exchanger plates, which are stacked onto each other and arranged in such a way that they in the plate package form first plate interspaces for a first medium and second plate interspaces for a second medium,
• a casing, which encloses the plate package and which comprises a circular cylindrical outer envelope and two end plate members, the outer envelope defining a center axis which extends through the two end plate members,
• a first inlet and a first outlet, which are adapted to convey the first medium into and out from the plate heat exchanger and extend through a respective one of the two end plate members,
• a second inlet and a second outlet, which are adapted to convey the second medium into and out from the plate heat exchanger, each of the heat exchange plate comprising an opening which forms a space in the plate package,
• wherein the end plate members having an inner surface facing the plate package, an outer surface facing away from the plate package and a surrounding surface connecting the inner surface and the outer surface to each other, the end plate members are attached to the outer envelope by a releasable connection and the surrounding surface of one of the end plate members faces an inner surface of the outer envelope;
• wherein the outer envelope has a first envelope end, a second envelope end, a first flange at the first envelope end and a second flange at the second envelope end, wherein the first end plate member is connected to the first flange and wherein a second end plate member of the end plate members is connected to the second flange;
• and
• wherein the first flange extends radially inwardly from the first envelope end and abuts the outer surface of the first end plate member.