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.

Nearly all types and makes of ultrasonic flowmeters require some length of straight pipe upstream and downstream of the flowmeter itself.

The general guidelines suggested by manufacturers of turbine flow meters are 15-20 straight pipe diameters (inclusive of the strainer) straight pipe runs 

downstream of the flow meter (figure 2). For optimum flow meter performance a minimum length of upstream and downstream piping 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?

Meter Orientation. Support. Flow Conditioners. Upstream Downstream. Pipe. Pipe Wall Condition Concentricity Horizontal. Vertical. Sloping. By-Pass.

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.

B. Two pipe diameters (downstream) C. Flow direction Installations with reduced upstream and downstream straight runs are possible. In reduced straight run installations, the meter may not meet accuracy specifications. Reported flow rates will still be highly repeatable. 3.3 Flow direction. The sensor should be mounted so that the arrow points

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

elbow and the upstream side of magnetic flow meters was completed in this research. installed only three diameters downstream of the elbow.

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