GE T17, Руководство по установке

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Model T17 Installation Guide 7
Chapter 2. Installing the Pipe Nozzles
2.2.2 Selecting and Marking the First Nozzle Location - Diametrical (cont.)
To mark the first nozzle location, complete the following steps:
1. For optimum performance, you should select a location that has at least 20 pipe diameters of straight,
undisturbed flow upstream and 10 pipe diameters of straight, undisturbed flow downstream from the
measurement point (see
Figure 6 below). Undisturbed flow means avoiding sources of turbulence such as
valves, flanges, elbows, swirl and disturbed flow profiles.
Figure 6: Diametrical Nozzle Locations
2. We recommend that you install the nozzles on a diameter as near as possible to the horizontal plane
(i.e., 3 o’clock and 9 o’clock positions) for a horizontal pipe.
Note: If you cannot find a proper location, please consult with GE Flow Application engineering.
3. At the 3 o’clock position, center punch the pipe to mark the position for the center of the first nozzle, as shown
in
Figure 7 below.
Figure 7: Mark First Nozzle Location
FLOW
NOZZLE
2 PLACES
10D
20D
D
45°
TOP VIEW
END VIEW
TOP
Side View