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Fitting Guide

Dimensions butt welded Straight Tees
ASME B16.9 NPS 1/2 - 48

Straight Tee ASME b16.9
NPS O.D.
D
Center to End
C
Center to End
M
1/2 21.3 25 25
3/4 26.7 29 29
1 33.4 38 38
42.2 48 48
48.3 57 57
2 60.3 64 64
73 76 76
3 88.9 86 86
101.6 95 95
Straight Tee ASME b16.9
NPS O.D.
D
Center to End
C
Center to End
M
4 114.3 105 105
5 141.3 124 124
6 168.3 143 143
8 219.1 178 178
10 273 216 216
12 323.8 254 254
14 355.6 279 279
16 406.4 305 305
18 457 343 343
20 508 381 381
22 559 419 419
24 610 432 432
Straight Tee ASME b16.9
NPS O.D.
D
Center to End
C
Center to End
M
26 660 495 495
28 711 521 521
30 762 559 559
32 813 597 597
34 864 635 635
36 914 673 673
38 965 711 711
40 1016 749 749
42 1067 762 711
44 1118 813 762
46 1168 851 800
48 1219 889 838

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.
Outlet dimension (M) for NPS 26 and larger is recommended but not required.

Dimensional Tolerances Straight 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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