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Title: Orifice Fittings
Author: T. Michael Ricketts
Source: 1966 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1966
Abstract: Mention Orifice Measurement to practically anyone in the industry and odds are that the first image that pops into his head is an orifice plate. While the orifice plate is definitely the heart of good orifice measurement, this type of measurement, like most everything else, cannot depend entirely on one single factor. The orifice plate, plate holder, and upstream and downstream tube, together called the Primary Element, are all important parts in obtaining good measurement and should be manufactured, purchased and inspected to the same rigid requirements of an orifice plate alone.