Chapter 1. Installing Pipe Nozzles
18
T5 Flare Gas Transducer Installation Guide
1.3.3 Determining and Marking the Second Nozzle Location
1.
The second nozzle is located a distance equal to one pipe O.D. along the pipe centerline and on the opposite
side of the pipe (180
°
around the circumference). Spray this area with a marking dye product.
Note:
For installation angles other than 45°, the distance along the pipe centerline is equal to the pipe O.D. times the
tangent of the installation angle.
2.
To account for possible variations in the O.D. of the pipe, measure the pipe O.D. at four location between the
nozzle centers. Calculate the average outside diameter based on these measurements.
3.
Using a roll of polyester film (or equivalent), cut a strip of film to the following width and length:
IMPORTANT:
Ensure that the sides of the film are cut parallel to each other.
•
Width
- equal to the average pipe O.D., as calculated in Step 1 above.
•
Length
- equal to 4 times the average pipe O.D., as calculated in Step 1 above.
D1
D2 D3
D4
Side View
Average
O.D.
4 X O.D.
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