High pressure vessel

A high-pressure container, comprising:

• a cylinder, composed of plastic, to serve as a centre member, the cylinder including:
• at least one half-shell, composed of a multilayer composite plastic that includes a plastic layer and a barrier layer, at an axial end of the cylinder;
• a boss member having a foot member at an end thereof facing an interior of the high-pressure container, the foot member being embedded in the plastic of the half-shell to substantially form a hollow cone or hollow cylinder, the foot member having a first groove filled with the multilayer composite plastic of the half-shell, and which extends around an inner circumference of the foot member at a level of the sleeve, a second groove which is filled with the multilayer composite plastic of the half-shell, and which extends around at least in portions on the base of the foot member facing the interior of the high-pressure container, a third groove which is filled with the multilayer composite plastic of the half-shell and which extends around at least in portions on a cover face of the foot member that faces the interior of the high-pressure container, and a fourth groove which is filled with the multilayer composite plastic of the half-shell, and which extends around at least in portions on the base of the foot member facing the interior of the high-pressure container;
• a sleeve pressed into the inner circumference of the foot member;
• a valve received in the boss member, the valve having a shaft portion received in the sleeve;
• a first sealing element, arranged on a base of the first groove between the plastic layer and the foot member, to form a first seal;
• and
• a second sealing element, arranged on a base of the second groove between the plastic layer and the foot member, to form a second seal.