The invention relates to a securing device (15) for securing a pipe (12) in a housing (7), the device comprising: a cylindrical collar (16), at least three fixing arms (17), each fixing arm comprisinga proximal arm portion (34) mounted on the cylindrical collar, a distal arm portion (35) bearing a bearing pad (19), the bearing pad comprising a bearing surface (20) facing away from the collar andintended to collaborate with a wall (9) of the housing, in which device at least one of said fixing arms comprises a guideway (48, 49) capable of translationally guiding the distal arm portion with respect to the proximal arm portion, an elastic member (18) being coupled to the guideway so as to be able to apply a return force that pushes the distal arm portion away from the proximal arm portion.