T5 Flare Gas Transducer Installation Guide
3
Chapter 1. Installing Pipe Nozzles
1.2.1 Identifying and Checking the Nozzle Installation Kit Components (cont.)
1.
Check the marking on the end of the welding boss. The
pipe O.D.
and the
bias dimension
(i.e., the
transducer
spacing
) are engraved on the boss as shown below. Typically,
•
For flow velocities up to 100 m/s (328 ft/s), the
10 in. spacing
is used on pipes 18 in. (450 mm) in diameter
or larger, while the
9 in. spacing
is used on pipes 16 in. (400 mm) in diameter or on larger pipes when
attenuating gases are present.
•
For flow velocities up to 120 m/s (394 ft/s), the
6.4 in. spacing
is used on pipes 14 in. (356 mm) in
diameter or larger.
Note:
Bias dimension refers to the distance between the center of the nozzle location and the center line of the pipe.
2.
Check the spacing between the holes on the alignment plate, as shown below. The dimensions should
correspond to the bias/spacing dimension on the welding boss.
36 in.
5 in.
Bias Dimension (Spacing)
Pipe O.D.
3.4 in. Bias = 6.4 in. Spacing
4.5 in. Bias = 9 in. Spacing
5 in. Bias = 10 in. Spacing
12.73 in.
4.5 in. Bias (9 in. Spacing)
14.14 in.
5 in. Bias (10 in. Spacing)
9.05 in.
3.2 in. Bias (6.4 in. Spacing)
Bolt location shown
for 150# rating.
