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Fittings 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
3/4 - 1/2 26.7 21.3 29 29
1 - 1/2 33.4 21.3 38 38
1 - 3/4 33.4 26.7 38 38
1.1/4 - 1/2 42.2 21.3 48 48
1.1/4 - 3/4 42.2 26.7 48 48
1.1/4 - 1 42.2 33.4 48 48
1.1/2 - 1/2 48.3 21.3 57 57
1.1/2 - 3/4 48.3 26.7 57 57
1.1/2 - 1 48.3 33.4 57 57
1.1/2 - 1.1/4 48.3 42.2 57 57
2 - 3/4 60.3 26.7 64 44
2 - 1 60.3 33.4 64 51
2 - 1.1/4 60.3 42.2 64 57
2 - 1.1/2 60.3 48.3 64 60
2.1/2 - 1 73 33.4 76 57
2.1/2 - 1.1/4 73 42.2 76 64
2.1/2 - 1.1/2 73 48.3 76 67
2.1/2 - 2 73 60.3 76 70
NPS O.D.
D
O.D.
D1
Center to End
C
Center to End
M
3 - 1.1/4 88.9 42.2 86 70
3 - 1.1/2 88.9 48.3 86 73
3 - 2 88.9 60.3 86 76
3 - 2.1/2 88.9 73 86 83
3.1/2 - 1.1/2 101.6 48.3 95 79
3.1/2 - 2 101.6 60.3 95 83
3.1/2 - 2.1/2 101.6 73 95 89
3.1/2 - 3 101.6 88.9 95 92
4 - 1.1/2 114.3 48.3 105 86
4 - 2 114.3 60.3 105 89
4 - 2.1/2 114.3 73 105 95
4 - 3 114.3 88.9 105 98
4 - 3.1/2 114.3 101.6 105 102
NPS O.D.
D
O.D.
D1
Center to End
C
Center to End
M

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 2.1/2

3 to 3.1/2

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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