According to the Piping Handbook 7th Edition, “All control valve stations should be designed with the valve stem in the vertical upright position and a minimum of three diameters of straight pipe both upstream and downstream of the control valve, in order to reduce the turbulence entering and leaving the valve and to provide space for removal of the flange studs or bolts.”
Has anyone else heard of this straight run requirement and does anyone practice this in their designs? What are the implications for not having this straight run?
Thanks,
DGrayPPD
.
.