Transport by pipe is the means more used, at the present time, to convey energies of
their point of extraction until their field sites final. To limit any risk of explosion or of escape
and thus to limit the geological problems of pollution and the human risks, it is necessary to
be able to know the mechanical properties of the steels used in the manufacture of these pipes.
With the reduction in oil stocks, it is necessary to find a new energy. Hydrogen is this new
energy vector, it thus will also be necessary to be able to transport it. This study makes it
possible to emphasize the assignment of the lifespan of hydrogen on a pipeline steel normally
used in the transport of gas. The fatigue tests in 3 points bending are carried out on samples
not standards because of dimensions of the tube of origin