Ball joint coupling for pivotally coupling two pipe parts, which ball joint coupling comprises: - a first coupling part with a central passage and an at least partially ball-shaped outer surface; - a second coupling part with an axially extending, central passage and an at least partially socket-shaped inner surface which corresponds with the at least partially ball-shaped outer surface in order to form a ball joint; wherein the second coupling part comprises a base part arranged around the central passage, and locking segments arranged around the central passage and pivotally on the base part, which locking segments each have a socket-shaped surface part, wherein the socket-shaped surface parts form at least a part of the at least partially socket-shaped inner surface of the second coupling part, wherein the locking segments are each pivotable around a tangential pivot axis between a first position, wherein the socket-shaped surface parts of the locking segments lie against the ball-shaped outer surface of the first coupling part, and a second position wherein the locking segments release the first coupling part for uncoupling of the second coupling part; and - a blocking ring which extends around the second coupling part and is axially displaceable between a blocking position, in which the blocking ring encloses the locking segments in the first position and blocks the pivoting movement of the locking segments, and a release position for releasing the locking segments characterized in that a hinge (10, 11, 12) is arranged between a first axial end of each locking segment and the base part, wherein the tangential pivot axis is formed by the hinge (10, 11, 12). - a first coupling part with a central passage and an at least partially ball-shaped outer surface; - a second coupling part with an axially extending, central passage and an at least partially socket-shaped inner surface which corresponds with the at least partially ball-shaped outer surface in order to form a ball joint; wherein the second coupling part comprises a base part arranged around the central passage, and locking segments arranged around the central passage and pivotally on the base part, which locking segments each have a socket-shaped surface part, wherein the socket-shaped surface parts form at least a part of the at least partially socket-shaped inner surface of the second coupling part, wherein the locking segments are each pivotable around a tangential pivot axis between a first position, wherein the socket-shaped surface parts of the locking segments lie against the ball-shaped outer surface of the first coupling part, and a second position wherein the locking segments release the first coupling part for uncoupling of the second coupling part; and wherein the second coupling part comprises a base part arranged around the central passage, and locking segments arranged around the central passage and pivotally on the base part, which locking segments each have a socket-shaped surface part, wherein the socket-shaped surface parts form at least a part of the at least partially socket-shaped inner surface of the second coupling part, wherein the locking segments are each pivotable around a tangential pivot axis between a first position, wherein the socket-shaped surface parts of the locking segments lie against the ball-shaped outer surface of the first coupling part, and a second position wherein the locking segments release the first coupling part for uncoupling of the second coupling part; and - a blocking ring which extends around the second coupling part and is axially displaceable between a blocking position, in which the blocking ring encloses the locking segments in the first position and blocks the pivoting movement of the locking segments, and a release position for releasing the locking segments characterized in that a hinge (10, 11, 12) is arranged between a first axial end of each locking segment and the base part, wherein the tangential pivot axis is formed by the hinge (10, 11, 12).