Flow measurement is one of the most important process measurements made. There are many types of flowmeters and selection can be difficult.
ISA (www.isa.org) publishes Standards, Books,
Software and Video tapes which include Flow Measurement.
ISA members require Adobe Acrobat Reader to view Intech magazine articles about flow
measurement.
ISA Directory of Instrumentation (www.isa.org/directory) is a resource for finding
products and manufacturers of Instrumentatin.
ASME (www.asme.org/) codes and standards.
American Petroleum Institute (http://www.api.org/)
Flow Control Network (www.flowcontrolnetwork.com)
The Water Measurement Manual (http://ogee.do.usbr.gov/fmt/wmm/) A Water Resources technical publication by the US Department of the Interior Bureau of Reclaimation. Includes Basic Concepts of Flow Measurement, Measurement Accuracy, Selection of Measurement Devices, Inspection, etc.
Omega Technical Reference - Flow and
Level (http://www.omega.com/techref/flow.html)
An overview of types and capabilities of Liquid Flowmeters, plus guidelines on selection,
installation, and maintenance.
Brooks Instruments
(http://www.frco.com/brooks/index.dgw).
Controlotron
(http://www.controlotron.com/)
Daniel Industries
(http://www.danielind.com/) .
Elsag Bailey
(http://www.ebpa.com/)
Endress + Hauser (http://www.endress.com/).
Fisher Rosemount (http://www.frco.com).
Flow Technology (http://www.ftimeters.com/)
The Flow Resource.
Fluid Components
(http://www.fluidcomponents.com/)
Foxboro
(http://www.foxboro.com).
McCrometer
(www.mccrometer.com/).
Omega
(www.omega.com).
Panametrics
(http://www.panametrics.com/).
Schlumberger
(http://www.slb.com/ms/) measurement and systems.
Seametrics
(http://www.seametrics.com/links.htm)
links. Flow Meter Finder™ selection software.
Smith Meter
(www.fmc.com/Eteg/Etmd/smithmeter.html)
Yokogawa
(http://www.yokogawa-ia.com/)
Search the ISA Directory of Instrumentation and Suppliers & Manufacturers
(http://www.xcelco.on.ca/~btsmith/vendors.htm) product directories for additional
product and contact information.
Emerging Flow Technology
Boosts Accuracy and Savings (http://www.isa.org/fmo/journals/intech/jan9852.pdf)
Smart multivariable transmitters plus averging pitot tube provides accurate mass fkow
measurement and lowers costs.
Errors Occur Often in Municipal Flowmetering (http://www.isa.org/fmo/journals/intech/sep97/flow.html) accessible by ISA members only. Municipal water and wastewater systems employ multifarious flowmeters measuring fluids at rates up to 200,000 gallons per minute ( gpm) through primaries of over 90 inches in diameter.
Flow Computers or Cash
Registers? (http://www.isa.org/fmo/journals/intech/jan9748.pdf)
Flow computing can provide critical measurements for tracking product transfers across
plant boundaries, through and between pipeline systems, at shipping terminals and even at
oil or gas well heads.
Developments in DP Flowmeters (http://www.controlmagazine.com/0498/C0560498.html) Improvements in Primary Elements are Keeping Differential Pressure Flowmeters the First Choice for Many Process Applications. This article reviews the theory underlying the use of pressure transmitters to measure flow and examines the advantages and disadvantages of each type of primary element.
Flowmeter Selection Isn't Easy, But Tools Are Here (http://www.manufacturing.net/magazine/ce/archives/1996/11/issues/na/11g851.htm) Wherever liquids or gases flow, it is a sure bet that the amount going from one place to another has to be measured, and with the right method. The importance for measuring flow can vary from very high, such as custody transfer, to relatively noncritical, such as recordkeeping. Regardless of why a user wants to measure flow, the challenge is to select the most applicable technology.
Flow
Sensing: The Next Generation
(http://www.manufacturing.net/magazine/ce/archives/1997/ctl1101.97/11a850b.htm)
Process flow sensing is a need that will remain beyond the time when Scotty has to monitor
the flow of matter and antimatter to the dilithium crystals. Here are some changes that
have come about and a look at others on the way.
Turbine Flowmeters, Monitor of Choice for Custody Transfer (http://www.manufacturing.net/magazine/ce/archives/1996/05/issues/na/05e308.htm) The importance of accuracy in flow and volume measurements cannot be overestimated. To avoid the types of errors that could affect credibility, one company turned to turbine flowmeters.
Flowmeters Pass the Muster (http://www.manufacturing.net/magazine/ce/archives/1998/ctl0402.98/04e407.htm) Measuring the flow of fluids is critical in many industrial plants. For some applications, measuring flow accurately can make the difference between making a profit or taking a loss.
Matching the Flowmeter to the Job (www.flowcontrolnetwork.com/article_index.cfm?article=84) Today, investment in flow measurement technology represents more than 40 percent of a company's annual capital investment for instrumentation. Improvements in flow measurement performance can add significantly to the bottom line.
Using
meters to measure steam flow
(http://www.manufacturing.net/magazine/planteng/archives/1998/ple0401.98/043526.htm)
When people hear about fluid measurement, they usually think of checking either liquid or
gas flow. This belief is natural, since about 90% of fluid measurements are for these two
applications. In a worldwide survey of flowmeter users, 68% measured liquids, 22% gas, and
only 10% steam.
Ensuring
Orifice Plate Accuracy
(http://www.manufacturing.net/magazine/planteng/archives/1997/ple1001.97/103519.htm)
Following some basic guidelines ensures that correct flow measurements are made.
Ever since the Italian physicist Giovanni B. Venturi recorded his findings on the use of
orifices for fluid flow measurement in 1779, orifice flowmeters have become a worldwide
standard. And why not? They are economical, accurate, rugged, and require minimal
maintenance. The hydrocarbon industry, for instance, where service conditions can be
severe, uses orifice flowmeters extensively.
Brian Smith
ISA Annunciator
July 1998.