INLET/OUTLET SYSTEM FOR COMPOSITE PRESSURE RECEPTACLES

The present invention provides an inlet/outlet system (3) for a composite pressure receptacle comprising an inner liner (1) and an outer composite shell (2), said inlet/outlet system (3) comprising - a circular collar (8) for being located circumferentially between the inner liner (1) and the outer composite shell (2), said collar being provided with a recess in the part of its inner diameter destined for being adjacent to the outer shell, - an annular disc (5) having a shape which fits into the recess of the circular collar, - a circular plug (6) with a central opening provided with a thread suitable for engaging a valve or a fitting, and wherein the outer surface of the plug (6) comprises a first portion or the surface located closest to the opening of the inlet/outlet system (3) to the outside, a second portion adjacent to the first portion, and a third portion adjacent to the second portion, wherein the first portion comprises a circumferential recess, the second portion is provided with a fixing means to ensure the fixing of the plug (6) in the receptacle and allowing it to withstand pressure loads, and the third part includes at least one groove for insertion of a sealing element (7). The invention further provides a composite pressure receptacle comprising an inner liner (1), an outer composite shell (2), and the inlet/outlet system (3) according to any one of the preceding claims.