Pressure test points consisting of a process connection with a plugged process quality root valve should be provided on process equipment and piping at the following locations:
• Inlet and outlet of packed vessels and columns
• Indicating pressure transmitters, controllers, and recorders. The pressure test point is the same as the calibration connection on the instrument manifold
• Inlets and outlets (both shell and tube side) of all heat exchangers and reboilers
• Inlet and outlet of each air cooler
