Abstract: Device for connection between adjacent solar receiver tubes of the type which are at the end of the solar receiver tube (1) to be joined with another adjacent solar collector tube, comprising: An expansion compensating element with at least two concentric bellows (7, 8) that are connected to each other and to a rigid ring (9) by means of a welded joint, which keeps them concentric in the expansion and compression process and joined to the glass tube (4) by the cover (12) and glass-metal transition element (21), A connection flange (5) to connect the solar receiver tube (1) to the one adjacent thereto, the flange (5) being a round metal plate with a hole that houses the absorber tube (3), Some through bolts (20) passing through the connection flange (5) to attach it with flange of the adjacent receiving tube (1).

Abstract: Working method for a system for partial mirroring of glass tubes and said system, made up by an tube supply facility, a chain where the mirroring is carried out in different fixed stations and a tube output facility, in which the main partial mirroring steps are the following: cleaning the glass tube sensitizing the surface washing optional activation or super-sensitization step washing plating washing drying in the case of external partial mirroring, the following steps are added: depositing the copper layer washing depositing anti-corrosion paint depositing mechanical and UV protective paint curing the paint external drying of the tube