A seal assembly for a piping connection comprising, either i); - a first part having at least one projecting rib extending at least partially along an outer circumference thereof, where the first part is provided with a first and fourth corresponding shoulder (8', 13') for sealing connection with a first and fourth shoulder (8, 13) of a first and second piping end (4, 5) when connected, and - a second part arranged to be attached to the first part, the second part being provided with at least one recess on an inner surface thereof, which recess is adapted to receive the projecting rib when the first and second parts are connected, and wherein the second part is provided with second and third corresponding shoulders (9', 12') for sealing connection with a second and third shoulder (9, 12) of the first and second piping ends (4, 5) when connected, or ii) - a first part having at least one recess extending at least partially along an outer circumference thereof, where the first part is provided with a first and fourth corresponding shoulder (8', 13') for sealing connection with a first and fourth shoulder (8, 13) of a first and second piping end (4, 5) when connected, and - a second part arranged to be attached to the first part, the second part being provided with at least one projecting rib on an inner surface thereof, which recess is adapted to receive the projecting rib when the first and second parts are connected, and wherein the second part is provided with second and third corresponding shoulders (9', 12') for sealing connection with a second and third shoulder (9, 12) of the first and second piping ends (4, 5) when connected, and, wherein, according to both i) and ii), - the recess has a larger cross-section area than the cross-section area occupied by the projecting rib within the recess, such that when the first and second parts are connected, they are free to move relative to each other in at least one direction. i); - a first part having at least one projecting rib extending at least partially along an outer circumference thereof, where the first part is provided with a first and fourth corresponding shoulder (8', 13') for sealing connection with a first and fourth shoulder (8, 13) of a first and second piping end (4, 5) when connected, and - a second part arranged to be attached to the first part, the second part being provided with at least one recess on an inner surface thereof, which recess is adapted to receive the projecting rib when the first and second parts are connected, and wherein the second part is provided with second and third corresponding shoulders (9', 12') for sealing connection with a second and third shoulder (9, 12) of the first and second piping ends (4, 5) when connected, - a first part having at least one projecting rib extending at least partially along an outer circumference thereof, where the first part is provided with a first and fourth corresponding shoulder (8', 13') for sealing connection with a first and fourth shoulder (8, 13) of a first and second piping end (4, 5) when connected, and - a second part arranged to be attached to the first part, the second part being provided with at least one recess on an inner surface thereof, which recess is adapted to receive the projecting rib when the first and second parts are connected, and wherein the second part is provided with second and third corresponding shoulders (9', 12') for sealing connection with a second and third shoulder (9, 12) of the first and second piping ends (4, 5) when connected, or ii) - a first part having at least one recess extending at least partially along an outer circumference thereof, where the first part is provided with a first and fourth corresponding shoulder (8', 13') for sealing connection with a first and fourth shoulder (8, 13) of a first and second piping end (4, 5) when connected, and - a second part arranged to be attached to the first part, the second part being provided with at least one projecting rib on an inner surface thereof, which recess is adapted to receive the projecting rib when the first and second parts are connected, and wherein the second part is provided with second and third corresponding shoulders (9', 12') for sealing connection with a second and third shoulder (9, 12) of the first and second piping ends (4, 5) when connected, and, wherein, according to both i) and ii), - the recess has a larger cross-section area than the cross-section area occupied by the projecting rib within the recess, such that when the first and second parts are connected, they are free to move relative to each other in at least one direction. - a first part having at least one recess extending at least partially along an outer circumference thereof, where the first part is provided with a first and fourth corresponding shoulder (8', 13') for sealing connection with a first and fourth shoulder (8, 13) of a first and second piping end (4, 5) when connected, and - a second part arranged to be attached to the first part, the second part being provided with at least one projecting rib on an inner surface thereof, which recess is adapted to receive the projecting rib when the first and second parts are connected, and wherein the second part is provided with second and third corresponding shoulders (9', 12') for sealing connection with a second and third shoulder (9, 12) of the first and second piping ends (4, 5) when connected, - the recess has a larger cross-section area than the cross-section area occupied by the projecting rib within the recess, such that when the first and second parts are connected, they are free to move relative to each other in at least one direction.