Model pressurized reaction vehicle

A model reaction pressure vessel made of metal for inserting into an autoclave for carrying out chemical reactions at various pressures, having a one piece cup-shaped bottom part (1) and a welded-on lid (2), wherein the outer lid margin (2b) is designed as a joint edge so as to run parallel to and lie adjacent to the outer circumferential surface of the cup-shaped bottom part, and wherein the lid (2) and the cup-shaped bottom part (1) are welded only at the outer circumferential surface, and wherein a supporting ring (3) is mounted around the outer circumferential surface of the cup-shaped bottom part (1), and this supporting ring (3) as viewed from the bottom part (1), lies opposite the lid margin (2b), the lid margin (2b), bottom part (1) and supporting ring (3) being welded together, wherein the lid (2) is equipped with necked Portions (2c), or welding sleeves (5, 6), wherein inserts, such as screw fittings (4) or pipe connections (7), are inserted into the necked portions, or welding sleeves, and are welded to the necked portions or welding sleeves.