A fluid coupling includes a first coupling member, a second coupling member configured for connection with the first coupling member, and a sleeve disposed at least partially around the first coupling member and/or the second coupling member. In embodiments, the sleeve may include a first flame-retardant layer, a second flame-retardant layer, a third flame-retardant layer, and at least one reinforcement of a non-rubber, rigid material.

A pipe connection that includes two tubular connection pieces for a conical clamping connection, the connection pieces being screwed together by a union nut while one connection piece is plugged inside the other. Each connection piece has a conical sealing surface which sealingly rests against the other, and an annular groove is provided in one of the sealing surfaces. The union nut is slit on the collar side.