Stabilizing a cylindrical conduit made of a cement material by extrusion, comprises alternately rotating the conduit to an interior of a tubular gauge by heating the conduit in wetness conditions

摘要

The process comprises alternately rotating a conduit to an interior of a tubular gauge by heating the conduit in wetness conditions of greater than 95%. During the rotation, the temperature is increased from a value of ambient temperature to a maximum value of 50-60[deg] C at an average speed of less than 4[deg] C/h for 2 hours and decreased from a value of maximum to a value of 30[deg] C at an average speed of lower than 15[deg] C/h. The tube and the tubular gauge are maintained in rotation on alternative direction at a speed of 0.2-10 rotations per minute. Independent claims are included for: (1) a cylindrical conduit; (2) a process for the production of cylindrical conduit; and (3) an apparatus for the production of cylindrical conduit.