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Chapter 2. Installing the Pipe Nozzles
2.3.1 Identifying the Nozzle Installation Kit Components - MR1 Mid-Radius (cont.)
Check the etched markings on the welding boss, as illustrated in Figure 26 below. The MR1 Mid-Radius path
designation, the pipe OD and the mounting angle are engraved on the bosses.
CAUTION!
and that the etched markings are the same on both bosses
2.3.2 Selecting and Marking the First Nozzle Location - MR1 Mid-Radius
CAUTION!
Therefore, 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
centerline of the pipe. The centerlines of the two nozzles must form an angle of
other, and the points where the two nozzle centerlines intersect the pipe centerline must be within
±1/16" (±1.6 mm)
flanges must be parallel to each other.
WARNING!
(see "Hot Tapping the Pipe - MR1 Mid-Radius" on page 35).
20
Before proceeding, be certain that these etched values match your intended installation
Scribe Line Aligns with
Oblique Line Marked on Pipe
Figure 26: P/N 591-338 Welding Bosses for MR1 Configurations
Correct nozzle alignment is critical to the accurate operation of the flow meter.
of each other. When the nozzle installation is complete, the raised faces of the two
All hole cutting in live process piping must be performed using
with the
45° ±1°
with each
180° ±1°
equipment
hot tapping
Model T17 Installation Guide
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