The Solar Envelope-Its meaning for urban growth and form

The invention relates to a socket connection of tubes or tubular elements, in particular of metal, with a plug-in (male) end and a socket (female) end which accommodates the former with radial clearance and has a radially extending inside shoulder against which supports itself in axial direction a one-piece sealing and anti-thrust ring with a foot section and several retaining elements spaced in circumferential direction and engaging with an inside edge of the periphery of the plug-in end whose head portion, located inside axially, seals the annual space between the socket end and the plug-in end.