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Title: Micrometer Measurements Of Orifice Meter Tubes
Author: Ray Forbes
Source: 1983 Appalachian Gas Measurement Short Course
Year Published: 1983
Abstract: Micrometer measurement of meter tubes are often taken during initial inspection of the meter tube prior to acceptance by the user, during regularly scheduled Inspection periods in accordance with company policy, and during periodic inspection of custody transfer measurement stations. Most important, however, are those measurements taken during fabrication and calibration of the meter tube. It is generally difficult to fabricate meter tubes properly in the field due to lack of experience and continuity in the process, therefore it is desireable to use only factory fabricated meter tubes where proper tools and techniques are available. The meter tube is generally referred to as the section of pipe immediately upstream and downstream of the orifice plate holding device, (Fig, 1) and careful attention must be given to its fabrication.

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