New at Piping Design Central: 19 June 2003

Software
http://www.pipingdesign.com/software1.html

-->PipingOffice

Ben A. Nottingham

<<It's a must have for the piping engineer, pipe stress analyst, mechanical integrity analyst, and pipe specification developer.>>

Flowmeters
http://www.pipingdesign.com/flowmeters.html

-->Raising the Bar for Primary Elements

Control Engineering Online

<<New measurement technologies are flowing through the stream measurement marketplace. New flowmeters such as ultrasonic, vortex, and Coriolis are causing a fundamental shift in the market away from traditional technologies and towards the new technologies. User concerns with reliability, cost of ownership, maintenance requirements, and improved accuracy are driving these changes. Differential pressure (dp) flowmeters are squarely in the middle of this change. Dp flowmeters use a primary element to place a constriction in the flow stream, causing a drop in pressure. The device's transmitter uses the resulting pressure drop to calculate the flow rate. Flow rate is proportional to the square root of the difference in pressure, and is calculated using Bernoulli's equation.>>

-->One Person's Opinion: Pumps and Flow Controls
Engineered Systems

<<Selecting the right flowmeter, and even more importantly, installing it correctly, are critical for the proper operation of the building automation system (bas). Flowmeters that are not selected correctly or that are not installed correctly can produce large errors and cause a great deal of trouble. The first step in selecting the right flowmeter for the application is to compare the flowmeter specifications with the actual application. You have to look at the specific piping, pressure, and temperature conditions, and make sure that the flowmeter is going to be operating in the optimum portion of its measurement and operating range.>>

-->Advanced Differential Pressure Flowmeter Technology
Flowmeter Directory

<<The V-Cone's remarkable performance characteristics, however, are the result of its unique design. It features a centrally-located cone inside the tube. The cone interacts with the fluid flow, reshaping the fluid's velocity profile and creating a region of lower pressure immediately downstream of itself. The pressure difference, 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, 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. The cone's central position in the line optimizes the velocity profile of the flow at the point of measurement, assuring highly accurate, reliable flow measurement regardless of the condition of the flow upstream of the meter.>>

-->Ultrasonic Flowmeter Basics

Sensors Online

<<Doppler and transit-time flowmeters are gaining ground in liquid, and in some instances gas, flow measurement applications. Understanding how they work will help guarantee optimum performance.>>

Diversions
http://www.pipingdesign.com/fun1.html

-->The Falkirk Wheel

General Information

<<This magnificent, mechanical marvel has been constructed to 21st Century, state-of-the-art engineering and it is already being recognised as an iconic landmark worthy of Scotland's traditional engineering expertise.>>

-->The Falkirk Wheel

Engineering / Design

<<The wheel consists of massive steel arms which stand 35 m high and revolve around a central hub, driven by hydraulic motors at one end.>> Received on Thu Jun 19 06:01:00 2003