One of our maintenance site, We have a requirement to test and maintain the fire pumps. Last week we have conducted the flow test of fire pumps during the time we got the result of while testing diesel fire pump at 100% flow rate. Discharge flow pressure does not meet 100% of actuals design pressure. It reaches only 50%. As per our local authority discharge pressure must meet at least 95% of design pressure at 100% rated flow. Can you please assist what is the main cause of this issue and how to do corrective action to meet at least 95%.
Thanks & Regards,