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The six EEC thin 250 mm orifice plates were dimensionally checked before and after flow calibration tests were carried out in the NEL cold-water test facilities. No measurable changes were found in the orifice diameter, flatness, surface texture and concentricity of the plates. A slight increase in the end radii was detected, with two plates being outside the allowable tolerances.

Additional information

Authors: NATIONAL ENGINEERING LABORATORY, National Engineering Laboratory, Engineering Metrology Business Centre, Glasgow (GB)
Bibliographic Reference: EUR 13728 EN (1991) 21 pp., MF, ECU 4
Availability: (2)
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