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2.3.2 Selecting and Marking the First Nozzle Location - MR1 Mid-Radius (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 27 below). Undisturbed flow means avoiding sources of turbulence such as
valves, flanges, elbows, swirl and disturbed flow profiles.
FLOW
TOP VIEW
Note: We recommend that you install the nozzles on a chord as near as possible to the horizontal plane for horizontal
pipe. If you cannot find a proper nozzle location, please contact GE for assistance.
2. Locate the top of the pipe and put a center punch mark there as a reference mark.
Model T17 Installation Guide
20D
Figure 27: MR1 Mid-Radius Nozzle Locations
Figure 28: Punch Mark on Top of Pipe
10D
45°
NOZZLE
2 PLACES
Chapter 2. Installing the Pipe Nozzles
TOP
D
END VIEW
21
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