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Chapter 2. Installing the Pipe Nozzles
2.4.4 Installing the First Welding Boss - MR2 Mid-Radius (cont.)
Table 9: X Values for Common Pipe Sizes with 0.375" Wall Thickness
NPS (inches)
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 59 below.
48
Pipe OD
DN (mm)
26
650
28
700
30
750
32
800
34
N/A
36
900
38
N/A
40
1000
42
1050
44
1100
46
N/A
48
1200
52
1300
54
N/A
56
1400
60
1500
64
1600
66
N/A
Oblique
x
Centerline
Figure 59: Scribing the Oblique Centerline
X Dimension
inches
0.502
0.501
0.499
0.498
0.497
0.496
0.495
0.494
0.493
0.493
0.492
0.492
0.491
0.490
0.490
0.489
0.488
0.488
True Centerline
Oblique Centerline
Ends at Horizontal Line
mm
12.76
12.72
12.68
12.65
12.62
12.59
12.57
12.55
12.53
12.51
12.50
12.49
12.46
12.45
12.44
12.42
12.41
12.40
Model T17 Installation Guide
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