Sealing ring for container

A vessel sealing ring for vessels subjected to high pressure comprising an annular body, a polymer gasket and a sealing gasket, wherein the annular body is in contact with a surface of a high pressure lid and with a surface of a high pressure vessel, and wherein said annular body comprises at least a first part and a second part which are concentric and coupled to one another by means of a mechanical stop, wherein a radius of the second part and a radius of the first part are a same or different size,

• wherein the first part of the annular body is an outer ring which is in contact with the vessel surface and with the lid surface,
• wherein the second part of the annular body is an inner ring which is in contact with the lid surface,
• wherein the high pressure exerted on the sealing ring produces stresses which expand the annular body, such that gaps between the annular body and the vessel surface and lid surface are closed, preventing both the polymer gasket and the sealing gasket from extruding,
• wherein the first part and the second part of the annular body are made with materials having different properties for increasing the fatigue life and reducing the damage from erosion and scratching,
• wherein the first part and the second part are expandable due to stresses produced by a pressure exerted on the sealing ring,
• wherein the first part and the second part of the annular body are made of a metal with a mechanical strength between 550 MPa and 2000 MPa,
• wherein the first part and the second part of the annular body are made of a metal with a Young's modulus having a value less than 13500 MPa,
• wherein the second part of the annular body is made of a metal having a high fracture toughness, and
• wherein the first part of the annular body is made of a metal having a low coefficient of friction with the material of the vessel.