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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
40 - 18 1016 457 749 622
40 - 20 1016 508 749 635
40 - 22 1016 559 749 648
40 - 24 1016 610 749 660
40 - 26 1016 660 749 673
40 - 28 1016 711 749 673
40 - 30 1016 762 749 698
40 - 32 1016 813 749 711
40 - 34 1016 864 749 724
40 - 36 1016 914 749 737
40 - 38 1016 965 749 749
42 - 26 1067 660 762 698
42 - 28 1067 711 762 698
42 - 30 1067 762 762 711
42 - 32 1067 813 762 711
42 - 34 1067 864 762 711
42 - 36 1067 914 762 711
42 - 38 1067 968 762 711
42 - 40 1067 1016 762 711
42 - 16 1067 406.4 762 635
42 - 18 1067 457 762 648
42 - 20 1067 508 762 660
42 - 22 1067 559 762 660
42 - 24 1067 610 762 660

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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