GE T17, Руководство по установке

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Chapter 2. Installing the Pipe Nozzles
30 Model T17 Installation Guide
2.3.4 Installing the First Welding Boss - MR1 Mid-Radius (cont.)
2. Scribe the oblique center line on the pipe from the horizontal scribe line upward around the pipe, at the
calculated or tabulated distance from the true center line. The oblique center line should be marked on the side
of the true center line that is closer to the second nozzle location. One end of the oblique centerline should stop
at the horizontal scribe line, as shown in
Figure 38 below.
Figure 38: Scribing the Oblique Centerline
Table 5: X Values for Common Pipe Sizes with 0.375” Wall Thickness
Pipe OD X Dimension
NPS (inches) DN (mm) inches mm
26 650 0.502 12.76
28 700 0.501 12.72
30 750 0.499 12.68
32 800 0.498 12.65
34 N/A 0.497 12.62
36 900 0.496 12.59
38 N/A 0.495 12.57
40 1000 0.494 12.55
42 1050 0.493 12.53
44 1100 0.493 12.51
46 N/A 0.492 12.50
48 1200 0.492 12.49
52 1300 0.491 12.46
54 N/A 0.490 12.45
56 1400 0.490 12.44
60 1500 0.489 12.42
64 1600 0.488 12.41
66 N/A 0.488 12.40
True Centerline
Oblique Centerline
Oblique Centerline
Ends at Horizontal Line
x