Abstract: A supporting grid for tubes comprising a central reticular structure formed of main and secondary intersecting strips, an inner annular frame formed in the same material as the strips and so designed as to receive with a tight fit the ends of said strip therein, said inner frame being higher than the reticular structure so that upper and lower projecting portions are created together with cleaning ducts, and an external annular frame formed of a different material and consisting of an external box ring and of an external cover ring capable of receiving and containing therein said projecting portions of the inner frame, axially extending and inwardly facing dogs being provided at the inner portion of said external frame; the inner frame and the external frame being assembled so that at room temperature said dogs of the external frame fit tightly to the inner cylindrical surface of said projecting portions while play exists between the external cylindrical surface of the inner frame and the internal cylindrical

Abstract: A system for transferring tubes or bars or like elongated elements between a processing line and associated storage structures or intermediate delivery locations is disclosed. The system includes spacing stations for intermittently spacing groups of tubes or bars, apparatus for transporting the groups from one spacing station onto one of several storage cantilever supports adapted to support the tubes or bars with their axes parallel to that of the processing line, apparatus for intermittently laterally removing groups of spaced elongate elements from the storage supports via an intermediate supporting station, and apparatus for rotating the elements through 90.degree. in order to deposit them on supports at the inlet end of the processing line with their axes at right angles to that of the processing line, or after removal from such supports onto an intermediate supporting station at the outlet end of the processing line.

Abstract: The invention refers to a supporting grid for pipes particularly in steam generators, heat exchanger and other thermic apparatus.This supporting grid is formed of a plurality of intersecting strips forming a reticular structure joined to a peripheral frame, characterized by the fact that the connection between the strips and the peripheral frame is made by means of precision mechanical fixing joints, which prevents reciprocation of the parts but permits free thermic expansion of the same.