Absorber pipe

An absorber pipe for solar collectors in solar-thermal power plants having at least one collector mirror, the absorber pipe comprising:

• a metal pipe for conducting and heating a heat transfer medium;
• a cladding pipe surrounding the metal pipe to form an annular space;
• a getter material disposed in the annular space for binding free hydrogen present in the annular space;
• a reflector disposed in the annular space for reflecting solar radiation into the metal pipe, wherein the reflector has a housing with a storage section for fastening and for protecting getter material from the solar radiation;
• a wall running between the cladding pipe and the metal pipe, the wall sealing the annular space, wherein the wall comprises an outer ring, a transition element, an expansion bellows, and a connection element;
• and
• a retaining device disposed in the annular space at least partially between the expansion bellows and the metal pipe, and having a receiving section configured to receive a getter material or a container filled with getter material, wherein the retaining device is fastened to one of the outer ring, the transition element, the expansion bellows, and the connection element.