Pipe Flow Wizard Serial Number Generator

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Pipe Flow Wizard Serial Number Generator

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Calculator for pressure drop due to minor losses and friction for for known flow rate in a pipe. Calculate flow rate for known pressure drop in a pipe. Calculate flow velocities on the start and on the end of pipe. Friction factor calculation.

Adiabatic compressible flow is the flow where no heat is transferred to or from pipe like in short, perfectly insulated pipe. The heat which is created due to flow friction is added to the flow and that amount of energy is actually acceptable. For adiabatic compressible flow is:

The flow in long pipelines closely approximates isothermal conditions. The pressure drop in such lines is often large compared to inlet pressure and solution of this problem is outside the limitations of the Darcy equation. An accurate solution is made by compressible isothermal equation where weight flow w in [kg/s] is:

p1,2 - pressure on the begging and on the end of pipe line; w - mass flow rate; v1 - specific volume; f - friction factor; L - pipe length; D - internal pipe diameter; A - pipe cross section area;

p1,2 - pressure on the begging and on the end of pipe line; w - mass flow rate; Zm - mean compressibility factor; R - gas constant; T - temperature; f - friction factor; L - pipe length; D - internal pipe diameter; A - pipe cross section area;

p1,2 - pressure on the begging and on the end of pipe line; w - mass flow rate; v1 - specific volume; f - friction factor; L - pipe length; D - internal pipe diameter; A - pipe cross section area; Zm - mean compressibility factor; R - gas constant; T - temperature;

qh - volumetric flow rate [m3/h]; p - pressure [Pa]; T - temperature [K]; Sg - relative density [ - ]; Lm - pipe length [km]; d - internal pipe diameter [mm]; f - friction factor [ - ];

qh - volumetric flow rate [m3/h]; p - pressure [Pa]; T - temperature [K]; Sg - relative density [ - ]; Lm - pipe length [km]; d - internal pipe diameter [mm];

Friction factor used in Weymouth formula is: f=0.094/d 1/3. This friction factor is identical with one obtained from Moody diagram for fully turbulent flow for 20 inch inside diameter. For pipe diameters that are smaller than 20 inch, Weymouth friction factors are larger and for pipes bigger than 20 inch, Weymouth friction factor is smaller than in friction factors obtained from Moody diagram for same pipe sizes.

Panhandle formula is for natural gas pipe sizes from 6" to 24", and for Reynolds numbers between Re = 5x106 and Re = 14x106, with specific gravity for natural gas Sg=0,6. The flow efficiency factor E is defined as an experience factor and is usually assumed to be 0.92 for average operating conditions.

Calculate pressure drop online, flow rate and pipe diameter in natural gas pipeline. Calculator is applicable for any natural gas composition. Calculation is based on the isothermal gas pressure drop calculation formula. Calculation of natural gas pressure drop is also available as incompressible flow.

p1 - absolute pressure on the start of pipe line [bar]; p2 - absolute pressure on the end of pipe line [bar]; Sg - relative density [ - ]; L - pipe length [km]; qh - volumetric flow rate [m3/h]; D - internal pipe diameter [mm];

When the pressure on the downstream of the gas flow reaches certain value, further pressure decrease at the end will not cause higher weight rate of flow [kg/s]. It means that the gas flow in the pipe has its maximum depending on the available energy on beginning. If the pressure drop is sufficiently high, the exit gas velocity will reach the speed of sound, and maximum weight gas flow rate will occur. Further pressure drop and pressure decrease on the outlet will not be felt upstream because the pressure wave can only travel as sonic velocity and the "information" about pressure drop will never translate upstream. Shock waves will occur but actual gas weight flow rate will not increase. The maximum possible gas velocity in the pipe is sonic velocity, which is expressed as:

In the case of the gas compressible flow through a short pipe into the area with larger cross section, or into the atmosphere, the flow is usually considered to be adiabatic. For this situation Darcy formula should be used with factors to compensate on the fluid changes due to expansion, using expansion factor Y. Modified Darcy formula with expansion factor included is then:

where is: w - mass flow rate [kg/s]; Y - expansion factor [ - ]; d - internal pipe diameter [mm]; Δ p - pressure difference [Pa]; ρ - density [kg/m3]; K - total resistance coefficient [ - ];

The value K in this equation is the total resistance coefficient of the pipe line, including entrance and exit losses when they exist, and losses due to valves and fittings. In above equation the pressure difference Δ p is the difference between inlet pressure and the pressure on the larger cross section. When compressible fluid is flowing into the atmosphere it is equal to gauge inlet pressure.

When the pressure difference Δ p between inlet pressure and the larger cross section area pressure, or the atmosphere pressure, is higher than the value in the table below, for certain value of resistance factor K, the flow will be sonic on the exit or somewhere along the pipe and expansion factor Y will be as it is given in table bellow.

digitalYEWFLO Vortex flowmeter Reduced Bore Type is a vortex flowmeter in which the main body of the vortex flowmeter and the reducer (reduction pipe and expansion pipe) are integrated into a casting.Suitable for lines with large fluctuations in flow rate depending on the season, such as steam supply lines.Since the reducer and the vortex flowmeter are integrated, it is not necessary to prepare a reducer and a short pipe for securing the straight pipe length.This not only simplifies installation and reduces costs, but also improves safety by reducing the number of connection points.

As an example of a vortex flowmeter application, a reducer may be used to measure low flow.In this case, as shown in the figure below, it is necessary not only to connect the reduction pipe and the expansion pipe, but also to connect short pipes to secure the straight pipe length upstream and downstream respectively. As a result, not only is the installation process complicated and difficult, but also the installation cost increases. Furthermore, with six connections, the risk of fluid leakage increases.

The Reduced Bore Type has a concentric reducer. Therefore, there is no need to install not only the reduction pipe and the expansion pipe, but also the short pipe for securing the straight pipe length.Furthermore, the reduced number of connections brings reducing the risk of fluid leakage and installation costs.The measurement lower limit value is expanded by 2 to 3 times, and a low flow rate can be measured with a pipe diameter size flowmeter.

digitalYEWFLO Vortex Flowmeter Multi-Variable Type is a flowmeter most suitable for steam applications, with a built-in resistance temperature sensor (Pt1000) in a solid shedder bar (vortex generator).Analog and pulse signals can be output simultaneously, and while displaying the flow rate on the display, it is also possible to display the fluid temperature as a temperature monitor function. It contributes to the total cost reduction and energy saving of the line using steam as the heat medium.

Remote electronics allows you to locate the indicator away from the process measurement point and to more convent visible area. Remote digitalYEWFLO vortex flowmeters are available in a number of different sizes ranging from 1/2-inch to 16-inch. Available with wafer style or flanged style (ANSI Class 150 to ANSI Class 900). digitalYEWFLO has the size you need.

Vortex flowmeters generally affect flow measurement accuracy when the flow velocity distribution in the pipe is biased.Necessary straight pipe length and main points are shown along with typical installation examples.

Install the valve on the downstream side of the flowmeter. The upstream straight pipe length dependent on the element located on the upstream such as reducer/expander, bent and etc., refer to description as above. Keep 5D or more for downstream straight pipe length.In case the valve has to be installed on the upstream of the flowmeter, ensure the upstream straight pipe length to be 20D or more, and the downstream straight pipe length be 5D or more.

The digitalYEWFLO vortex flowmeter has a simple two-line display.The upper part of the display shows the flow rate in selected engineering unit or % of the span, and the lower part shows the total flow rate or alarm number.

Additionally, some errors which are difficult to check from the outside of the pipe, such as fluid flow error (CHECK Flow) and vibration abnormality (CHECK Vibration) are also displayed as the result of self-diagnosis.

Mobile application enables easy access to device information necessary for plant maintenance work. You can search for device information and documentation such as General Specifications, User's Manual, Test Certificate by specifying serial number or scanning QR Code on the device. Compatibility check between a failed device and a spare device is also possible. Yokogawa will contribute to improving the efficiency of customer's plant maintenance work by providing instant access to device information.

There are several methods in the marketplace to measure the oscillation. Diaphragms or capacitance sensors are two of the more common; but, the best method is the use of Piezo-electric crystal sensors. These sensors, when compressed, produce an electric signal that can be sent to the Flowmeter's electronics. Now that the Karmen Vortex Frequency is measured (and we know the St and d), the flowmeter electronics can do simple calculations to determine volumetric flow through the pipe. 2ff7e9595c