Abstract: A coupling system for coupling two pipe ends (2, 3) which are each provided with an outer wall (21, 31) and, at at least one circumferential position on the outer wall (21, 31), a protrusion (20, 30) that extends radially outwardly, comprises a frame (10) which can adopt an open condition and a closed condition, the open condition allows the frame (10) to be put around the two pipe ends (2, 3) when put together for a continuation of a pipeline lumen, the frame (10) in the closed condition being configured to house the two pipe ends (2, 3) when put together for a continuation of the pipeline lumen, wherein the frame (10) comprises at least a first and a second restrictor part (11, 12), the first and second restrictor parts (11, 12) being configured to allow an abutment against the protrusions (20) of the opposite pipe ends (2) in the closed condition of the frame (10), so that the pipe ends (2, 3) are at least limited from moving away from each other in a pipeline direction by inability of the protrusions (20,