SooCS, thanks for your input. It is the same conclusion that I have come to in reading various codes. I would further add that one should place a blocking valve (gate, plug or ball) directly against the check valve ALLOWING SUFFICIENT ROOM FOR CHECK VALVE FLAPPER MOVEMENT (either up or down...
Is a Wafer Check Valve, when subjected to reverse flow, a stop valve for the purpose of pipe design according to ASME Code 34.3? The main purpose of this question is to determine the boundry between system design pressures.
I agree that one should not rely on a check valve as a means of isolation, especially to work behind (say on a pump or control valve where you have a line break).
But with regard to defining the design temperature and pressure of a pipe system. That is the gist of the question.
Thanks for...
Is a Wafer Check Valve, when subjected to reverse flow, a stop valve for the purpose of pipe design according to ASME Code 34.3? The main purpose of this question is to determine the boundry between system design pressures.
