The present invention relates to a disposable set (5) for dispensing a fluid from a reservoir (17) of a fluid dispensing system to a dosing device adapted to dispense the fluid into a patients' vein, the disposable set comprising a length of a tubing (15) for establishing a fluid connection from the reservoir and towards the dosing device to be inserted in the patients' vein. The the tubing (15) comprises a first (1) and a second (10) tubing part. The first tubing part (1) is provided to establish a connection towards the reservoir, the second tubing part (10) is provided to establish a connection towards the dosing device. The first and second tubing part (1, 10) are in fluid connection with each other and are releasable connectible to each other in a liquid tight manner.