Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: Fundamentals Of Orifice Flowmeters
Author: Richard R. Roseberry
Source: 1977 International School of Hydrocarbon Measurement
Year Published: 1977
Abstract: In ancient times, an orifice such as the hourglass was used to make different measurements and aid in control. Probably one of the oldest devices for measuring the flow rate of fluids is the orifice. The Egyptians used weir orifices for measuring the flow of water some 500 years before the time of Abraham (about 2200 BC) the Romans used it to measure water flow to homes. In the early 17th century, two Italians, Castelli and Torricelli, laid the basic foundation for orifice measurements. About 1640, one of Galileos students established the first mathematical statement of an orifice measurement principle. Approximately 100 years later, Bernoulli stated his theorem, which is the basis for our present-day hydraulic equation for orifice measurement. The original theorem is very simple in a fluid flowing through a pipeline, the energy potential at any point in the pipe is equal to the energy potential at any other point in the pipe, neglecting friction losses in the pipe, of course. The energy potential is basically elevation head, pressure head and velocity head (see Figure 1).

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.