Typically, flowmeter manufacturer's specify a minimum of 10 to 15 diameters of straight pipe. This means that for a 4″ diameter pipe, you would need 10 x 4 = 40″ of straight pipe, or for a 2″ pipe you would need 10 x 2 = 20″ of straight pipe. However, for more severe flow distortions, you may require more. How much straight pipe do you need?

The flow sensor – type, turndown and straight-run pipe requirements Upstream or downstream the PRV Station. • Straight-run pipe Straight-run length.

In our technical support department, the primary installation question we get is: How much upstream and downstream straight run is required 

The general rule of thumb for straight piping is a five-diameter length of piping upstream and three diameters downstream from the meter (measured from the center of the tube). Next, we will detail the various flow meters Upstream and Downstream Flow Straight Pipe Requirements. RFQ Flow Meters Table of Contents what is upstream and downstream flow?

Meters often require a specified amount of straight run upstream and downstream to deliver these accuracies—sometimes five to 10 or more pipe 

Meter Orientation Support Flow Conditioners Upstream Downstream Pipe Pipe Wall Condition Concentricity Horizontal Vertical Sloping By-Pass As a As a Plate, Tube Other Strainer Air Block Transmitter Sensing Isolation Pipe size should be the same as the meter size. Pipe length is established by Standards, Recommended Practices, or

1, 2, and 3 are respectively the front, behind and by-pass valves and 4 is the flow meter. L≥10D and L>=5D are respectively front and behind pipelines whose lengths are larger than 10 and 5 times of the pipe diameter respectively. Minimum pipe length (diameters): upstream lengths Before meter 10; downstream lengths after meter 5.

Required Straight Run to install flowmeters Technology On Flow Measurement F-0009 Required Straight Run to install flowmeters To obtain specified accuracy, straight run both for upstream and downstream is needed. The required straight run is depeding on the type of flowmeter. The recommended straight run by type is shown below.

their flow meter suppliers to provide engineering recommendations Recommendation for Flow Controlling Valves Upstream or Downstream. Pipe Size. Upstream.

Upstream/downstream piping length To ensure specification accuracy over widely varying process conditions, install the sensor with a minimum of five straight pipe diameters upstream and two straight pipe diameters downstream from the electrode plane. See Figure 1. This procedure should adequately allow for disturbances created by

Jan 05,  · 18" diameter duct. 180-inch-long straight section, upstream end open to atmosphere, downstream end connected to flow meter. Downstream of the meter, there is a 90-inch-long straight section, and then there's a blower, pulling air through the duct. I'm wondering what sorts of obstructions can be tolerated near the inlet end of this system.

The installed length of an orifice plate flowmetering system may be substantial; a minimum of 10 upstream and 5 downstream straight unobstructed pipe 

Meter Orientation Support Flow Conditioners Upstream Downstream Pipe Pipe Wall Condition Concentricity Horizontal Vertical Sloping By-Pass As a As a Plate, Tube Other Strainer Air Block Transmitter Sensing Isolation Pipe size should be the same as the meter size. Pipe length is established by Standards, Recommended Practices, or

As a rule of thumb, most manufacturers recommend a minimum of “20 times the pipe diameter” downstream of a 90-degree bend. For some exceptions 

Flow control valves are to be located downstream, if any. Corioli Force Mass flowmeter: MASSMAX7000 MASSMAX7100: Not required: Not required---Thermal Mass flowmeter/ Conroller: TF TC HM: Not required: Not required: 5D both upstream and downstream for type TF-1150,A1250,A1251, A1551,A2251. 5D upstream 0D for downstream for TF-2421 to 2441.

detailing the piping system 50 diameters upstream and 10 diameters downstream from the proposed meter location. 3. Internal straightening vanes can be used to reduce straight pipe length requirements, Consult Factory. 4. Positive Displacement and Coriolis Effect Meters are not infl uenced by upstream and downstream fi ttings.

Turbine flowmeter is a common type of flow meter. Install process connections to ensure that the tube goes upstream and downstream of the meter place. The minimum straight run upstream should be at least 20 diameters and the straight run downstream should be at least 5 diameters length.

Jul 13,  · In some cases, there is just not enough pipe to accommodate the minimum straight pipe requirement. In this case, you should use the 2/3 rule. Install the flowmeter with 2/3 of the

For upstream and downstream lengths equal to one half the values shown, add 2 percent to the accuracy value. — Any flow conditioner shall be installed in the straight length between the primary element and the upstream distance, or the fitting closest to the element. The straight lengths between

Up. 8. 9. 24. Down. 3. 3. 4. Note: 1. The straight runs shown above are conservative minimums. Longer upstream straight pipe lengths provide better accuracy 

Pipe Size Upstream Downstream < 6 inches [150 mm] 20 x Pipe ID 10 x Pipe ID ≥ 6 inches [150 mm] 15 x Pipe ID 7.5 x Pipe ID FCI flow meter performance guarantees are only available following completed AVAL software-based application evaluations.