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Fitting Guide

Dimensions Weldolet® Size on Size STD MSS SP97

Weldolet® Size on Size STD

Dimensions NPS 1/2 to 24

NPS A B C D
1/2 3/4
19.05
1.3/8
34.93
15/16
23.81
5/8
15.88
3/4 7/8
22.23
1.5/8
41.28
1.3/16
30.16
13/16
20.64
1 1.1/16
26.99
2
50.80
1.7/16
36.51
1.1/32
26.19

31.75
2.3/8
60.3

44.45
1.3/8
34.93
1.5/16
33.34
2.7/8
73
2
50.80
1.5/8
41.28
2
38.10

88.90
2.9/16
65.09
2.1/16
52.39
1.5/8
41.28
4.1/16
103.19
3
76.20
2.7/16
61.91
3
44.45
4.13/16
122.24
3.11/16
93.66
3.1/16
77.79
2
50.80
5.3/8
136.53
3.7/8
98.43
3.9/16
90.49
4 2
50.80
6
152.40

120.65
4
101.60
5
57.15
7.1/8
180.98
5.9/16
141.29
5.1/16
128.59
6 2.3/8
60.3

215.90
6.11/16
169.86
6.1/16
153.99
8
69.85
10.3/8
263.53
8.11/16
220.66
7.15/16
201.61
10 3.1/16
77.79
12.9/16
319.09
10.13/16
274.64
10
254.00
12 3.3/8
85.73
14.7/8
377.83
12.13/16
325.44
12
304.80
14
88.90
16.1/8
409.58
14.1/16
357.19
13¼
336.55
16 3.11/16
93.66
18¼
463.55
16.1/16
407.99
15¼
387.35
18 4.1/16
103.19
20¾
527.05
18.5/8
473.08
17¼
438.15
20 4.5/8
117.48
23.1/16
585.79
20.1/16
509.59
19¼
488.95
24 5.3/8
136.53
27.7/8
708.03
25.1/8
638.18
23¼
590.55
NPS A B C D
General notes:
  • Dimensions: Top Row in Inches / Bottom Row in millimeters.
  • Root Gap - X - "Space" for welding the O'let is raised off the run pipe to establish proper
    weld gap by placing spacers, e.g. welding rods, under the fitting. This provides a uniform
    welding gap between the curvature of the run and base of fitting.
  • L = Dimensions Center Line of Run Pipe + X (Root Gap) + A (height of Weldolet).
  • Bevelled Ends ASME B16.9 and B16.25.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Weldolet® is a registered name. Another often used name is Welding Outlet.
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