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Title: Orifice Meter Tube Dimensional Tolerances
Author: Rod Dent
Source: 2007 International School of Hydrocarbon Measurement
Year Published: 2007
Abstract: The orifice meter tube is the most widely used method of fluid measurement currently in use in the petroleum industry . Orifice fittings and orifice flanges developed to insert, retract, and hold the orifice plate in the meter tube in a dimensionally defined manner, are commonly used in meter tube assemblies. Each component of this meter tube assembly (normally welded and/or flanged together) must meet dimensional specifications of industry recommendations and standards (latest revisions) such as American Gas Association (AGA) Report No. 3- Part 2, the American Petroleum Institute (API) Chapter 14 section 3, ANSI, and ASME to name a few. This paper will discuss the manufacturing and fabrication dimensional tolerances involved in the design and construction of meter tubes.

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