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Fitting Guide

Dimensions Butt Welded Reducing Tees ASME B16.9 NPS 1/2 to 48

Reducing Tee ASME b16.9

Other Diameters

NPS O.D.
D
O.D.
D1
Center to End
C
Center to End
M
44 - 20 1118 508 813 686
44 - 22 1118 559 813 686
44 - 24 1118 610 813 698
44 - 26 1118 660 813 698
44 - 28 1118 711 813 698
44 - 30 1118 762 813 711
44 - 32 1118 813 813 711
44 - 34 1118 864 813 724
44 - 36 1118 914 813 724
44 - 38 1118 965 813 737
44 - 40 1118 1016 813 749
44 - 42 1118 1067 813 762
46 - 22 1168 559 851 724
46 - 24 1168 610 851 724
46 - 26 1168 660 851 737
46 - 28 1168 711 851 737
46 - 30 1168 762 851 737
46 - 32 1168 813 851 749
46 - 34 1168 864 851 749
46 - 36 1168 914 851 762
46 - 38 1168 965 851 762
46 - 40 1168 1016 851 775
46 - 42 1168 1067 851 787
46 - 44 1168 1118 851 800
48 - 22 1219 559 889 737
48 - 24 1219 610 889 737
48 - 26 1219 660 889 762
48 - 28 1219 711 889 762
48 - 30 1219 762 889 762
48 - 32 1219 813 889 787
48 - 34 1219 864 889 787
48 - 36 1219 914 889 787
48 - 38 1219 965 889 813
48 - 40 1219 1016 889 813
48 - 42 1219 1067 889 813
48 - 44 1219 1118 889 838
48 - 46 1219 1168 889 838

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.

Reducing Tee ASME b16.9

Dimensional Tolerances Reducing Tees ASME B16.9

Nominal Pipe Size

1/2 to 2½

3 to 3½

4

5 to 8

10 to 18

20 to 24

26 to 30

32 to 48

Outside Dia
at Bevel (D)

+1.6
-0.8

1.6

1.6

+2.4
-1.6

+4
-3.2

+6.4
-4.8

+6.4
-4.8

+6.4
-4.8

Inside Dia at End

0.8

1.6

1.6

1.6

3.2

4.8

+6.4
-4.8

+6.4
-4.8

Center to End (C / M)

2

2

2

2

2

2

3

5

Wall Thk (t)

Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

Note:
MSS SP-43 only covers stainless steel buttweld fittings made for use with Schedule 5S and 10S pipe and Stub Ends suitable for use with Schedule 40S pipe, as defined in ASME B36.19. The dimensions and dimensional tolerances defined in MSS SP-43 are substantially the same as those in ASME B16.9 specifications from NPS 1/2 - NPS 24. Except with regard to the outside diameter at the bevel.

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