Pressure vessel

A hybrid pressure vessel comprising:

• a liner having a connecting area, an inner face, and an outer face, the liner having a pipe-shape and an outer diameter;
• a metallic boss having an outer diameter at least as large as the outer diameter of the liner, the metallic boss being adapted to accommodate a valve;
• a squeezing ring disposed inside the liner to expand the connecting area of the liner against a counterpiece of the metallic boss to form a seal between the liner and the counterpiece,
• wherein the hybrid pressure vessel has a storage volume on the inside;
• and
• wherein the liner is made of a material at least partially plastically deformable under pressure, the hybrid pressure vessel has further at least one outer layer applied on the liner to the reinforcement thereof, the squeezing ring and the counterpiece accommodating the valve and for sealing the storage volume with respect to the liner;
• the connecting area of the liner comprising an outer face and an inner face for connecting the boss;
• the squeezing ring being positioned on one face of the connecting area of the liner and the counterpiece for generating a sealing pressure between squeezing ring, connecting area of the liner and counterpiece on a different face of the connecting area of the liner;
• the counterpiece having on its face facing the connecting area of the liner a suitably formed groove with a first edge facing the storage volume and a second edge in the opposite direction for receiving a sealing ring which seals under the sealing pressure;
• the groove and the sealing ring being dimensioned and the liner material being provided to form first and second sealing beads protruding at least in both gaps between sealing ring and first and second edge under the sealing pressure due to its plastic deformability.