WATER TANK TYPE PRESSURE-RESISTANT EXPANSION MEASURING METHOD FOR HIGH-PRESSURE CONTAINER

PROBLEM TO BE SOLVED: To provide a water tank type pressure-resistant expansion measuring method capable of highly precisely measuring and recording test data at every pressure-resistant expansion measuring test as a highly reliable data history and capable of keeping and monitoring the pressure of high-pressure water introduced into a pressure-resistant container highly precisely by a double check of electronic control and visual control. SOLUTION: In performing the water tank type pressure-resistant expansion measuring test of a cylinder B, the inner pressure of the cylinder B is set to a zero point and high-pressure water is introduced into the cylinder B to be pressurized up to initial pressure allowing the inner pressure of the cylinder B to reach 15% of measured maximum pressure (Mpa) and the expansion quantity (cc) of the cylinder B produced at this time is measured. The measuring standard straight line passing the intersecting point A of this expansion quantity and the initial pressure is drawn toward the intersecting point B of the measured maximum pressure and the expansion quantity at this time and, by measuring whether the actually measured pressurization line drawn as the inner pressure of the cylinder B is next pressurized up to 90% of the measured maximum pressure is drawn almost along the measuring standard straight line from the intersecting point A, only a valuable data history is accumulated. COPYRIGHT: (C)2005,JPO&NCIPI