| 摘要 |
PROBLEM TO BE SOLVED: To reduce labor and time of removable work of an orifice plate for flow rate measurement.SOLUTION: An orifice plate 1 disposed while being interleaved between flat face flanges during flow rate measurement of a fluid in a pipe includes a plurality of open holes 10 through which a bolt that couples the flat face flange. In the orifice plate 1, the open hole 10 disposed in a semicircular portion at the opposite side to a direction in which the orifice plate 1 is withdrawn between flat face flanges has a long hole shape because of a notch reaching the periphery of the orifice plate 1.SELECTED DRAWING: Figure 1 |
