Dimensions Reducing Thredolets® – MSS SP97

Thredolet® Reducing

Class 3000

NPS A B C
1/2 INCH
MM
1
25.40
1.13/32
35.71
15/16
23.81
3/4 INCH
MM
1.1/16
26.98
1.23/32
43.65
1.5/32
29.36
1 INCH
MM
1.5/16
33.33
2
50.80
1.7/16
36.51
1.1/4 INCH
MM
1.5/16
33.33
2.9/16
65.08
1.3/4
44.45
1.1/2 INCH
MM
1.3/8
34.92
2.27/32
72.23
2
50.80
2 INCH
MM
1.1/2
38.10
3.15/32
88.10
2.9/16
65.08
2.1/2 INCH
MM
1.13/16
46.03
4.1/16
103.18
3
76.20
3 INCH
MM
2
50.80
4.13/16
122.23
3.11/16
93.66
3.1/2 INCH
MM
2.1/8
53.975
5.7/32
132.55
4
101.6
4 INCH
MM
2.1/4
57.15
5.31/32
151.60
4.3/4
120.65
5 INCH
MM
2.5/8
66.67
7.5/16
185.73
5.9/16
141.28
6 INCH
MM
2.3/4
69.85
8.5/8
219.07
6.11/16
169.86
NPS A B C

Class 6000

NPS A B C
1/2 INCH
MM
1.1/4
31.75
1.23/32
43.65
3/4
19.05
3/4 INCH
MM
1.7/16
36.51
1.61/64
49.60
1
25.40
1 INCH
MM
1.9/16
39.68
2.7/16
61.91
1.5/16
33.33
1.1/4 INCH
MM
1.5/8
41.27
2.23/32
69.05
1.1/2
38.10
1.1/2 INCH
MM
1.11/16
42.86
3.1/4
82.55
1.15/16
49.21
2 INCH
MM
2.1/16
52.38
4.1/32
102.39
2.3/4
69.85
NPS A B C

General notes:

  • 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.
  • Threaded Ends are in accordance with ASME B1.20.1. Design per MSS SP-97.
  • Source comes from Bonney Forge (except the sizes in millimeters).
  • Thredolet® is a registered name. Another often used name is Threaded Outlet.