A set (15) of tubes for administering components to a bag (80) of product comprising: several tubular ducts (20)； a manifold (45) having several entrances, each inlet being adapted for connection to a respective tubular conduit (20), and an outlet (30) connectable to a first feed tube of said product bag (80): a branch (23) associated with at least one of said tubular ducts (20)； said branch (23) having: a branch inlet (25) connectable to said at least one of several tubular ducts (20) associated with said branch (23)； and at least two outlets (30, 35): a first outlet (35), connectable to a tubular conduit (40) in fluid communication with an inlet of said manifold (45), and a second outlet (30) connectable in a manner separable with a second feed tube (60) from said product bag (80), characterized in that the two outlets (30, 35) are arranged mutually so that when one end of the second feed tube (60) in fluid communication With the product bag (80) it is inserted into an inlet of a passage (200) of bypass fluid, the second feed tube (60) blocks said passage (200) of bypass fluid, where the end of the second Feed tube (60) is a hollow penetrating probe (230) and where a resealable membrane (210) is disposed at the second outlet (30), the resealable membrane (210) being configured to be pierced by the hollow penetrating probe (230 ).Un conjunto (15) de tubos para administrar componentes a una bolsa (80) de producto que comprende: varios conductos tubulares (20)； un colector (45) que tiene varias entradas, estando adaptada cada entrada para su conexión a un respectivo conducto tubular (20), y una salida (30) conectable a un primer tubo de alimentación de dicha bolsa (80) de producto: una derivación (23) asociada con al menos uno de dichos conductos tubulares (20)； teniendo dicha derivación (23): una entrada (25) de derivación conectable a dicho al menos uno de los varios conductos tubulares (20) asociado con dicha derivación (23)； y al menos dos salidas (30, 35): una p
