Model T17 Installation Guide
21
Chapter 2. Installing the Pipe Nozzles
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
below). Undisturbed flow means avoiding sources of turbulence such as
valves, flanges, elbows, swirl and disturbed flow profiles.
Figure 27: MR1 Mid-Radius Nozzle Locations
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.
Figure 28: Punch Mark on Top of Pipe
FLOW
NOZZLE
2 PLACES
10D
20D
D
45°
TOP VIEW
END VIEW
TOP