A pressure vessel for a high pressure press comprising: at least a first sub-cylinder and a second sub-cylinder, which are axially connected to form a cylinder body for enclosing a high pressure medium, a sealing arrangement arranged at the inner wall of the cylinder body for sealing the joint between the first and the second sub-cylinder (4, 6) against leakage of the high pressure medium, the sealing arrangement comprising a ring shaped sealing band, a first circumferential protruding flange, which is arranged on the inner wall of the first sub-cylinder and which axially extends from the joint and away from the second sub-cylinder, a second circumferential protruding flange, which is arranged on the inner wall of the second sub-cylinder and which axially extends from the joint and away from the first sub-cylinder; and a first circumferential mounting space, which is arranged in the inner wall of the first sub-cylinder and which axially extends from the first protruding flange and away from the second sub-cylinder; wherein the sealing band, in mounted position, is located concentrically within the first and the second protruding flanges (30, 32) such that it in a radially pre-stressed manner abuts against the first and second protruding flanges (30, 32) and sealingly overlaps the joint between the first and the second sub-cylinder (4,6), characterized in that the sealing band, in mounted position, has a circumferential portion axially extending past the first protruding flange and over a portion of the first mounting space such that a circumferential sealing channel is formed between the sealing band, a radial surface of the first protruding flange and the inner wall of the first sub-cylinder. at least a first sub-cylinder and a second sub-cylinder, which are axially connected to form a cylinder body for enclosing a high pressure medium, a sealing arrangement arranged at the inner wall of the cylinder body for sealing the joint between the first and the second sub-cylinder (4, 6) against leakage of the high pressure medium, the sealing arrangement comprising a ring shaped sealing band, a first circumferential protruding flange, which is arranged on the inner wall of the first sub-cylinder and which axially extends from the joint and away from the second sub-cylinder, a second circumferential protruding flange, which is arranged on the inner wall of the second sub-cylinder and which axially extends from the joint and away from the first sub-cylinder; and a first circumferential mounting space, which is arranged in the inner wall of the first sub-cylinder and which axially extends from the first protruding flange and away from the second sub-cylinder; wherein the sealing band, in mounted position, is located concentrically within the first and the second protruding flanges (30, 32) such that it in a radially pre-stressed manner abuts against the first and second protruding flanges (30, 32) and sealingly overlaps the joint between the first and the second sub-cylinder (4,6), characterized in that the sealing band, in mounted position, has a circumferential portion axially extending past the first protruding flange and over a portion of the first mounting space such that a circumferential sealing channel is formed between the sealing band, a radial surface of the first protruding flange and the inner wall of the first sub-cylinder.