I need to know the steps of this test and to know the churn pressure
Close the discharge side valve
Turn the pump on
No pressure minimum
There is quite a bit more to the churn test (also called the "no-flow test"). Read section 8.3.2 of NFPA 25, which has a page and a quarter of procedures and readings to take during the test.
Also, be careful about closing the discharge valve. Some people like to close this valve during the test, but I discourage that procedure. If a fire occurs during the test, severe damage can occur because the valve is closed. While this is a low probability event, it is a high consequence. There is no real value in closing the valve. The system should be able to handle the pressure created by the pump when it is running, so there should be no problem with leaving the valve open.
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