Flow restricting orifice

A method for equipping a tube connector (30) with a flow restricting orifice (2;

• 2′) and for connecting a tube (40) to the tube connector (30) equipped with the flow restricting orifice (2;
• 2′), the method comprising the steps:
• providing an assembly comprising a tube connector (30) and a flow restricting orifice, said flow restricting orifice comprising a tubular nozzle (4) having an insert portion (6) for insertion into a mouth of the tube connector;
• and a visible marking having a marking element which extends radially outwardly from the tubular nozzle (4) and which includes a frangible connection (12) which is connected to the tubular nozzle and which has at least one predetermined breaking point (14), the frangible connection (12) being configured to release the marking element when the frangible connection (12) is broken before the tube is completely pushed onto the tube connector, the marking element being configured to be retained on the tube connector or on the tube connected to the tube connector to remain, after the tube has been connected to the tube connector (30), as a marking element visible from the exterior of the tube, wherein the flow restricting orifice is fitted in the mouth of the tube connector (30);
• and
• wherein the insert portion (6) of the flow restricting orifice is inserted into the mouth of the tube connector (30);
• breaking the frangible connection (12) to release the marking element and moving the marking element further along the tube connector (30);
• and,
• pushing the tube (40) onto the tube connector (30) to connect the tube to the tube connector (30), the marking element remaining as a visible indicator retained at an end portion of the tube connector (30) in front of the connected tube (40) or at a front end portion of the tube (40).