Determining And Marking The Second Nozzle Location - Diametrical - GE T17 Installation Manual

Chapter 2. Installing the Pipe Nozzles
2.2.2 Selecting and Marking the First Nozzle Location - Diametrical (cont.)
4. Spray the area around the first nozzle location mark with a marking dye product. Using a metal straight edge,
scribe 6" long vertical and a horizontal lines that intersect at the center punch mark (see Figure 8 below).

2.2.3 Determining and Marking the Second Nozzle Location - Diametrical

To mark the second nozzle location, complete the following steps:
1. The location for the second nozzle is typically a distance equal to one pipe outside diameter along the pipe
from the first nozzle location and on the opposite side of the pipe (i.e., 180
marking dye product.
Note: For angles other than 45°, the distance is equal to the pipe OD times the tangent of the installation angle.
2. Due to the possible variation in OD of the pipe, measure the outside diameter of the pipe at four locations
between the nozzle centers (see Figure 9 below). Then, calculate the average OD from these measurements.
8
Figure 8: First Nozzle Scribe Lines
D2 D3 D4
D1
Figure 9: Multiple OD Measurements
Side View
°
around). Spray this area with a
Side View
Model T17 Installation Guide