Patent ID: 7258371
Filing Date: 2007-08-21
Classification: F16L

Abstract:
1. Connection system for conduits, fittings or assemblies which are intended for carrying gaseous carbon dioxide acted upon by a pressure increased with respect to a reference pressure, comprising a first coupling part, a second coupling part, the second coupling part being capable of being plugged in with a shank into a round receiving orifice of the first coupling part, whereby, after plugging-in, the circumferential seal, while undergoing deformation from a non-pressed state to a deformed state and generating a radial prepressing force, seals off a gap formed between the first and second coupling parts with a gap width between the outer radius of the shank and the inner radius of the receiving orifice and at the same time bears against the first and second coupling parts at least over a contact length, measured in the axial direction perpendicularly to the inner and outer radius of the first and second coupling parts, and whereby the cross section of the nonpressed circumferential seal, the groove depth and the gap width and the groove length are coordinated with one another in such a way, that a ratio is defined that determines a permeation of the carbon dioxide through the circumferential seal, in relation to the contact length, the permeation-active partial circumferential area is no greater than one fifth of the value of a cross-sectional area of the deformed circumferential seal, said cross-sectional area running perpendicularly to the axial direction.