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 pdf fileAGA Calculations 1985 Standard VS 1992 Standard
This paper is intended to help bridge the gap between the Old AGA-3 equation (hereafter referred to as AGA-3-1985) and the New AGA-3 equation (hereafter referred to as AGA-3-1992). As such the paper begins with a background section aimed at assisting those who are mostly familiar with the factored form of the orifice metering equation.

File size: 282.29 KB
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Last download: Thu Oct 06, 2016 08:53:45 PM


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 pdf fileORIFICE METER PRIMARY ELEMENTS STANDARDS
The April 2000 revision to the API 14.3 part 2 Standard includes the results of considerable test work over the past few years. Numerous changes are noted, some of which will have major effects on users of orifice measurement. The most significant impact will be in the upstream length and flow conditioner areas. This paper will discuss most of the changes and go into some detail on the more important ones. Items not mentioned essentially remain as stated in the previous issue of the Standard.

File size: 163.45 KB
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Last download: Tue Oct 04, 2016 02:35:13 PM


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 pdf fileAPPLICATION OF FLOW COMPUTERS FOR GAS MEASUREMENT AND CONTROL
Flow computers are microprocessor controlled CPUs specifically designed to measure and regulate the transfer of a fluid from one point to another. They are an essential part of electronic fluid flow measurement, and are usually installed in various remote locations throughout the production, transmission and distribution segments of the gas industry. The function of a flow computer is fourfold: collect measurement data, calculate and store measurement data, transmit stored measurement data to a host system, and execute control requirements. In addition to measurement data, the event log, audit trail, and alarm information is also collected, stored, and subsequently transmitted to a host system in accordance with API Ch 21.1 – Flow Measurement Using Electronic Metering Systems. All these flow computer functions are controlled by on-board firmware, sometimes in conjunction with inputs from the host system. It is this on-board firmware, and associated host software, that allows the user to maximize the flow computer’s versatility and efficiency.

File size: 109.14 KB
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Last download: Wed Oct 12, 2016 05:37:35 PM


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 pdf fileDESIGN AND ANALYSIS OF CORIOLIS MASS FLOWMETERS USING MSC NASTRAN
A Coriolis mass ilowmeter measures mass flow directly by vibrating a fluid—conveying pipe at resonance. Design of these meters was facilitated by solving the equations of motion via the finite element method. A complex eigenvalue analysis (SOLIU7) was necessary due to the presence of the Coriolis force terms in the damping matrix. Performance parameters of the meter can be predicted from the complex eigenvectors and were found to match experimentally determined values to within five percent Since vibration occurs during Coriolis meter operation, low stress designs must be used to preclude fatigue failure. This analysis was also performed using MSC/NASTRAN

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Last download: Tue Jan 03, 2017 06:29:26 PM


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 pdf fileCORIOLIS MASS FLOW DENSITY AND TEMPERATURE SENSING WITH A SINGLE VACCUM SEALED MEMS CHIP
flow rate, dose, chemical concentration, fluid density, specific gravity and temperature has been developed. Vacuum packaged, resonating silicon microtubes are employed to form both a Coriolis mass flow and density sensor. The micro Coriolis mass flow sensor has 10 times the resolution of the best commercially available macro Coriolis mass flow sensors. An onchip temperature sensor (RTD) has been added to the microchip, enabling accurate fluid temperature monitoring. At constant temperature the density resolution/or output stability approaches 1 over 1 million (6 digits) in the new system. Also a new method of chip-level gettering was developed to achieve the milliTorr pressures needed for adequate resonator signal quality for the vacuum packaged microsensors. Applications for both mass flow measurements and density sensing are discussed.

File size: 481.01 KB
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Last download: Tue Dec 20, 2016 12:40:51 AM


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 pdf fileNatural gas meter selection
Natural gas meter selection is based on a variety of factors: the most important of which are safety and accuracy. Other significant factors include repeatability, defensibility through adherence to contractual and/or regulatory requirements and industry standards, cost effectiveness, reliability, and uniformity with existing installations. This paper will briefly discuss commonly used high pressure gas meters, their basic functionality, applicable standards, installation and operating considerations based on the author’s experience and a review of industry standards and literature, their turndown, and specific examples of recent meter selections for specific applications

File size: 111.85 KB
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Last download: Wed Oct 12, 2016 05:38:58 PM


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 pdf fileMeasurement of flowing fluids
Variable head meters Variation of flow rate thro a constant area generates a variable pressure drop which is related to the flow rate Venturi meter Orifice meter Variable area meters Consists of devices in which the pressure drop is constant, or nearly so, and the area thro which the fluid flows varies with the flow rate. The area is related, thro proper calibration, to the flow rate Rotameter

File size: 107.5 KB
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Last download: Tue Oct 04, 2016 02:34:29 PM


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 pdf fileInnovations in Fluid Flow
In the late 1700s, Swiss physicist Daniel Bernoulli and his father, Johann, separately entered a scientific contest sponsored by the Unive rsity of Paris. They tied for first place. Johann, shamed by the comparable abilities of his son, banned Daniel from his house. His father also tried to steal Daniel’s b ook Hydrodynamica and rename it Hydraulica. Daniel’s father carried this grudge until his death.

File size: 321.21 KB
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Last download: Tue Oct 04, 2016 02:31:18 PM


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 pdf fileProving Coriolis Flowmeters
This manual was published primarily to support the application of Micro Motion Coriolis flowmeters used in custody transfer service, where the meters are proved by common proving methods. This is a comprehensive manual, in that it can be used for training those people who have minimal knowledge of Coriolis meters, and those people who know very little about proving techniques in general. For those experienced with the application of Coriolis flowmeters, or those experienced at proving other types of flowmeters, the manual has been designed in brief sections that can be referred to quickly and

File size: 775.27 KB
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Last download: Sat Oct 01, 2016 11:36:35 AM


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 pdf fileCoriolis Mass Fllow Meters for Naturall Gas Measurement
Theory of Operation – Density Operatiion Densiity & Piiickoffff Siiignalll

File size: 5.6 MB
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Last download: Tue Dec 20, 2016 12:41:14 AM


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