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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
34 - 16 864 406.4 635 533
34 - 18 864 457 635 546
34 - 20 864 508 635 559
34 - 22 864 559 635 572
34 - 24 864 610 635 584
34 - 26 864 660 635 597
34 - 28 864 711 635 597
34 - 30 864 762 635 610
34 - 32 864 813 635 622
36 - 16 914 406.4 673 559
36 - 18 914 457 673 572
36 - 20 914 508 673 584
36 - 22 914 559 673 597
36 - 24 914 610 673 610
36 - 26 914 660 673 622
36 - 28 914 711 673 622
36 - 30 914 762 673 635
36 - 32 914 813 673 648
36 - 34 914 864 673 660
38 - 18 965 457 711 597
38 - 20 965 508 711 610
38 - 22 965 559 711 622
38 - 24 965 610 711 635
38 - 26 965 660 711 648
38 - 28 965 711 711 648
38 - 30 965 762 711 673
38 - 32 965 813 711 686
38 - 34 965 864 711 698
38 - 36 965 914 711 711

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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