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2.5
Installing the First Welding Boss (cont.)
3. Position the welding boss such that the four scribe lines on the welding boss are lined up with the horizontal scribe
mark and the oblique center line on the pipe. Make sure you orient the boss as shown below.
4. Clamp the boss in place using a pipe strap or equivalent so that it cannot move during tack welding.
5. Check the boss alignment, then tack weld the carbon steel boss to the pipe in each of the four grooves between the
boss scribe marks.
6. Remove the clamp and check the alignment again. If the boss is misaligned by 0.02 in. (0.5 mm) or more, remove
the boss, grind off the welds and reinstall.
Model T9 Ultrasonic Flow Transducer Installation Guide
Oblique Center Line
Scribe Mark
Chapter 2. Installing Pipe Nozzles
Top View
Side View
11
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