To restore order to disturbed flow immediately upstream of a sensor sensitive to turbulence, what is a common guideline for straight pipe runs?

Answer

A minimum length of ten times the pipe diameter.

A common guideline for applications sensitive to turbulence is to allow a minimum pipe length of ten times the pipe diameter immediately upstream of the instrument to permit the flow profile to develop into a more organized state.

To restore order to disturbed flow immediately upstream of a sensor sensitive to turbulence, what is a common guideline for straight pipe runs?
flowlaminarturbulent