Selecting And Marking The First Nozzle Location - Diametrical - GE T17 Installation Manual

Chapter 2. Installing the Pipe Nozzles
2.2.1 Identifying the Nozzle Installation Kit Components - Diametrical (cont.)
Check the etched markings on the welding boss, as illustrated in Figure 5 below. The diametrical path code, the pipe
OD and the mounting angle are engraved on the bosses.
CAUTION!
that the etched markings are the same on both bosses

2.2.2 Selecting and Marking the First Nozzle Location - Diametrical

CAUTION!
all marking, positioning and welding operations must be carried out with the utmost attention to
accuracy. The centerline of each nozzle must form an angle of
The centerlines of the two nozzles must form an angle of
where the two nozzle centerlines intersect the pipe centerline must be within
each other. When the nozzle installation is complete, the raised faces of the two flanges must be
parallel to each other.
WARNING!
(see "Hot Tapping the Pipe - Diametrical" on page 17).
6
Before proceeding, be certain that these values match your intended installation and
Code for Diametrical Path
Figure 5: Welding Boss Etching
Correct nozzle alignment is critical to the accurate operation of the Flowmeter. Therefore,
All hole cutting in live process piping must be performed using
Pipe O.D.
Mounting
Angle
with the centerline of the pipe.
45° ±1°
with each other, and the points
180° ±1°
±1/16" (±1.6 mm)
hot tapping
Model T17 Installation Guide
of
equipment