SUCCESS/FAIL DECIDING METHOD FOR TEST OF HYDRAULIC PRESSURE IN DUCT

PURPOSE:To properly judge whether or not the tested hydraulic pressure in a duct is successful or not by performing comparative arithmetic between the supply amount of water obtained by measurement and the permissible supply amount of water. CONSTITUTION:While all opening-closing valves 5, 9, and 12 are closed, test water is supplied by a pump 14 into a connecting pipe 2 and a pipe body 1 through a supply pipe 7. Then the air in the pipe body 1 is discharged through an air vent pipe 4 as the test water is supplied and the 1st opening-closing valve 5 is closed when the tube body 1 is filled with the test water. Then when the pressure measured by a self-recording pressure gauge 10 reaches test hydraulic pressure, the supply amount of water is measured according to a flow rate value sent as an electric signal from a flow meter 11 while a processor 16 maintains the test hydraulic pressure. Then the measured supply water of water is compared with the permissible supply amount of water which is calculated previously from the shape of the hydraulic pressure tested pipe to decide whether or not the tested hydraulic pressure is successful or not.