It is well accepted that turbulence in pipe flow is transient for
$Re \lesssim 2000$
and, after some time, always comes back to the laminar state. However, there is no current agreement about the behaviour of turbulence for higher
: whereas some experiments indicate that turbulence becomes sustained after certain critical Reynolds number,
, other studies show that the turbulent state keeps its transient behaviour, ruling out any critical point. Our experiments show that these different views are not caused by the different ways of generating turbulence or by some experimental noise, and therefore the turbulent state is always well defined. Our data also suggest that, in spite of the different interpretations, all experimental results presented up to date are compatible when some sistematic error is taken into account.