Pipe are subjected to expansions created by different temperatures, pressure, external movements and from pipe’s weight too. Where the values of strengths and the movements overcome the acceptable values, it is necessary the use of expansion joints that allow to absorb the different thermal expansion. Some studious of engineering have declared that the employment of metallic expansion joints is preferred, because their flexibility absorbs movements in more directions with success, so that there is a considerable reduction of exercise costs (manpower). Furthermore the losses of head and thermal dispersions are contained, with particular benefit to pipes having big diameter. The expansion joint, to be able to exploit its own functions, must be chosen and projected according to working conditions. To the aim, and to allow a careful study, Giorgi’s technical offices are at client disposal to examin the best solutions for every specific situation. The expansion joints are classified according to the kind of expansion that they are able to absorb, as follows: Axial Universal Hinged Gimbal Lateral Spherical lateral Pressure balanced axial Pressure balanced universal

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