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Flow Level Pressure
Space/Weight Saving V-Cone Flow Meter Is Ideal for Mounted Module Systems
Designers of mounted module systems for a wide variety of oil/gas applications will find that the rugged McCrometer V-Cone Flow Meter from McCrometer (USA) fits into tight places, saving space and reducing weight while providing the highest levels of performance and accuracy.
Designed for portability, mounted module equipment requires a small footprint for easy shipment, quick installation in tight spaces and minimal environmental impact. The V-Cone Flow Meter is ideal for mounted module systems in the oil/gas industry, meeting the technical and space requirements for multiple applications in offshore and land-based production and refining operations.
The V-Cone provides the ideal solution for flow measurement in tight spaces such as mounted modules because it dramatically reduces the need for required
flow meter straight pipe runs while meeting or exceeding necessary technical specifications. Mounted module systems require compact minimal pipe runs, and the V-Cone reduces installation real estate, allows for flexible layouts and cuts overall pipe weight.
The precision V-Cone’s unique no-moving parts design provides built-in flow conditioning, which nearly eliminates the upstream/downstream straight pipe runs required by nearly all other flow meter technologies. Other Typical flow meter installations may require 10 to 40 straight pipe diameters upstream from the meter and 5 or more straight pipe diameters downstream to eliminate the effects of swirl and other pipeline disturbances caused by valves or elbows that negatively affect measurement accuracy.
The space-saving V-Cone reduces typical flow meter straight pipe run requirements by up to 70 percent or more and needs only 0-3 straight pipe diameters upstream and 0-1 downstream to operate effectively. It easily fits into mounted module systems in crowded deep water subsea production units, FPSO vessels and refineries, while also reducing pipe material costs and installation labor costs.
The versatile V-Cone operates over a wide flow range of 10:1 and supports line sizes from 0.5 to greater than 120 inches. Engineers in the oil/gas industry can rely on the V-Cone Flow Meter for low cost of ownership because it requires virtually no recalibration or maintenance over an exceptionally long life.
Unlike traditional DP instruments such as orifice plates and Venturi tubes, the
V-Cone Flow Meter’s design is inherently more accurate because the flow conditioning function is built-into the basic flow sensor design. The V-Cone conditions fluid flow to provide a stable flow profile, resulting in a stable signal that increases accuracy. The flow sensor‘s design features a centrally-located cone inside a tube. The cone interacts with the fluid flow and reshapes the velocity profile to create a lower pressure region immediately downstream.
The pressure difference, which is exhibited between the static line pressure and the low pressure created downstream of the cone, can be measured via two pressure sensing taps. One tap is placed slightly upstream of the cone and the other is located in the downstream face of the cone itself. The pressure difference can then be incorporated into a derivation of the Bernoulli equation to determine the fluid flow rate.
McCrometer’s versatile V-Cone Flow Meter is compatible with the demanding standards set by the oil/gas production and refining industry. The testing of the V-Cone Flow Meter conforms to the American Petroleum Institute’s API 22.2 Testing Protocol for Differential Pressure Flow Measurement Devices for standard measurement requirements, and other international certifications such as Measurement Canada and Brazilian INMETRO when allocation and even custody transfer measurements are required.
Reader Reply Card No 187 Rugged Pressure and Temperature Switches
With the series ZPN, ZDPN and ZT, Baumer (Germany) offers very robust pressure and temperature switches developed especially for the use in a wide variety of applications. The pressure switches are suitable for pneumatic or hydraulic control, for power generation safety equipments and for pressurised chambers control. They are resistant to short duration overpressure and show a good vibration resistance. The ZPN can measure a gauge pressure from -1 bar up to 600 bar with a very small intermediate range from -2 mbar up to 10 mbar. The ZDPN measures a differential pressure from 2 mbar up to 120 bar.
The pressure switches maintain a constant pressure around a chosen set value. When the pressure reaches a critical pre-set value, they trigger an alarm or safety system. A flexible diaphragm actuates
a micro-switch via a piston. The set point adjustment is realised via a compressible spring mounted on the opposite. Due to the force-balance principle, the dead band setting remains constant, even with different set point adjustments. With rapid pressure variations, an attenuator should be used to prevent a temporary on- and off-switching.
The ZT temperature switches are suitable for all fluids and measuring ranges between -45°C and 350°C. They maintain a constant temperature around a chosen set value and act as regulator of an alarm or safety system when the temperature reaches a critical preset value.
The pressure and temperature switches ZPN, ZDPN and ZT offer a very good repeatability (±1% F.S.) making them suitable for all demanding applications. The devices comply with ATEX 94/9/CE requirements for the use in hazardous areas; they are available in an intrinsically safe and an explosion-proof version. Approved by the French electricity board EDF, they are used in nuclear power stations all over the world.
Reader Reply Card No 188
US manufacturer, Fluid Components International (FCI), has announced its Customer GHG Reporting Fast Track Initiative in response to the US Environmental Protection Agency’s (EPA) new mandate per 40 CFR part 98 that requires greenhouse gas (GHG) emissions reporting effective January 1, 2010.
“To help our customers comply with the EPA’s new GHG reporting mandate, we have dedicated special gas flow meter application resources to assist them. We recognise that accurate measurement of greenhouse gas flow is important for compliance and the global environment, and are ready to do our part in helping our customers meet this challenge,” said Dan McQueen, President, FCI.
FCI’s new Customer GHG Reporting Fast Track Initiative is a three-prong program. A special toll free GHG Hotline is now available to answer flow meter questions. The hotline will be answered by FCI’s Flow Meter Applications Group, which includes experts in GHG measurement and stack gas monitoring. A special GHG Reporting Web Page is now live with FCI’s AVAL Gas Flow Meter Sizing Tool. AVAL is a simple online tool that assists process and plant engineers with proper flow meter selection. In addition, Fast Track Order Expediting is available to ensure instrument deliveries prior to January 1, 2010.
The EPA’s new reporting mandate requires more than 10,000 facilities to report the annual mass flow of greenhouse gases from their operations. Process and environmental compliance engineers at many industrial plants will be challenged to provide accurate measurement of these gas flow emissions to ensure proper reporting and compliance. For many operations, actual GHG measurements are required and for others, actual measurement can provide the best available technology solution that ensures long-term, accurate compliance. FCI manufactures an extensive line of gas mass flow meter solutions that can help plant managers with their compliance objectives.
FCI’s thermal dispersion technology gas flow meters are direct mass flow measuring instruments and most require only a simple, single insertion point into a pipe or stack to install. Instruments are available for installation in line sizes from 0.25 inches to more than 100 inches. In addition, FCI’s flow measurement accuracies of ±1% reading, ±0.5% of full scale, exceed the stated acceptable accuracy within the EPA mandate.
Measurements include mass flow rate, totalised flow and temperature with electronic output options for a built- in digital readout, standard 4-20mA analog outputs and/or digital bus communications such as HART and Profibus. Precision calibrations matched to the application, installation conditions and gas composition are a hallmark of FCI flow meters. FCI has extensive experience in producing high accuracy, highly repeatable flow meters for methane (CH4
), N2 0, SF6 out in the EPA mandate.
The EPA’s new reporting mandate will provide a better understanding of where GHG’s are coming from and will guide development of the best possible policies and programs to reduce emissions. The data will also allow businesses to track their own emissions, compare them to similar facilities and provide assistance in identifying cost effective ways to reduce emissions. FCI gas mass flow meters can provide an accurate, low cost and virtually maintenance-free solution for facilities required to instrument and measure the GHG emissions from their processes to comply with the mandate.
Reader Reply Card No 189 , HFCs, PFCs and CO2 as called
New Customer Fast Track Initiative to Meet EPA Greenhouse Gas Reporting Mandate
Annual Buyers’ Guide 2010
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