Pipe Tee dimensions are covered in ASME B16.9. Refer to the table given below for the size 1/2″ to 48″. In piping two types of the tee are uses. Stright / equal and reducing tee. The following shall be checked during the inspection of Pipe Tee Dimensions.

  • The diameter of branch and run pipe
  • The thickness of the tee
  • Center to center dimension for branch
  • Length of the tee.

Straight / Equal Tee Dimensions

equal tee
Pipe Tee Dimensions As Per ASME B16.9
NOMINAL PIPE SIZEOUTSIDE DIAMETERCENTER TO ENDLENGTH
Inch.ODCM
1/221.32525
3/426.72929
133.43838
1 1/442.24848
1 1/248.35757
260.36464
2 1/2737676
388.98686
3 1/2101.69595
4114.3105105
5141.3124124
6168.3143143
8219.1178178
10273.1216216
12323.9254254
14355.6279279
16406.4305305
18457.2343343
20508381381
22559419419
24610432432
26660495495
28711521521
30762559559
32813597597
34864635635
36914673673
38965711711
401016749749
421067762711
441118813762
461168851800
481219889838
All Dimensions are in mm

Reducing Tee Dimensions

reducing tee dimensions
Pipe Tee Dimensions As Per ASME B16.9
NOMINAL PIPE SIZEOUTSIDE DIAMETERCENTER TO END
InchDPCM
1/2 x 3/821.317.12525
1/2 x 1/421.313.72525
3/4 x 1/226.721.32929
3/4 x 3/826.717.12929
1 x 3/433.426.73838
1 x 1/233.421.33838
1 1/4 x 142.233.44848
1 1/4 x 3/442.226.74848
1 1/4 x 1/242.221.34848
1 1/2 x 1 1/248.342.25757
1 1/2 x 148.333.45757
1 1/2 x 3/448.326.75757
1 1/2 x 1/248.321.35757
2 x 1 1/260.348.26460
2 x 1 1/460.342.26457
2 x 160.333.46451
2 x 3/460.326.76444
2 1/2 x 27360.37670
2 1/2 x 1 1/27348.37667
2 1/2 x 1 1/47342.27664
2 1/2 x 17333.47657
3 x 2 1/288.9738683
3 x 288.960.38676
3 x 1 1/288.948.38673
3 x 1 1/488.942.28670
3 1/2 x 3101.688.99592
3 1/2 x 21/2101.6739589
3 1/2 x 2101.660.39583
3 1/2 x 1 1/2101.648.39579
4 x 3 1/2114.3101.6105102
4 x 3114.388.910598
4 x 2 1/2114.37310595
4 x 2114.360.310589
4 x 1 1/2114.348.310586
5 x 4141.3114.3124117
5 x 3 1/2141.3101.6124114
5 x 3141.388.9124111
5 x 2 1/2141.373124108
5 x 2141.360.3124105
6 x 5168.3141.3143137
6 x 4168.3114.3143130
6 x 3 1/2168.3101.6143127
6 x 3168.388.9143124
6 x 2 1/2168.373143121
8 x 6219.1168.3178168
8 x 5219.1141.3178162
8 x 4219.1114.3178156
8 x 3 1/2219.1101.6178152
10 x 8273.1219.1216203
10 x 6273.1168.1216194
10 x 5273.1141.3216191
10 x 4273.1114.3216184
12 x 10323.9273.1254241
12 x 8323.9219.1254229
12 x 6323.9168.3254219
12 x 5323.9141.3254216
14 x 12355.6323.9279270
14 x 10355.6273.1279257
14 x 8355.6219.1279248
14 x 6355.6168.3279238
16 x 14406.4355.6305305
16 x 12406.4323.9305295
16 x 10406.4273.1305283
16 x 8406.4219.1305273
16 x 6406.4168.3305264
18 x 16457406.4343330
18 x 14457355.6343330
18 x 12457323.9343321
18 x 10457273.1343308
18 x 8457219.1343298
20 x 18508457381368
20 x 16508406.4381356
20 x 14508355.6381356
20 x 12508323.9381346
20 x 10508273.1381333
20 x 8508219.1381324
22 x 20559508419406
22 x 18559457419394
22 x 16559406.4419381
22 x 14559355.6419381
22 x 12559323.9419371
24 x 10559273.1419359
24 x 22610559432432
24 x 20610508432432
24 x 18610457432419
24 x 16610406.4432406
24 x 14610355.6432406
24 x 12610323.9432397
24 x 10610273.1432384
All Dimensions are in mm
Piping Courses

Pipe Fittings Dimensions Tolerance as per ASME B16.9

Dimension Tolerance
NOMINAL PIPE SIZEALL FITTINGSALL FITTINGSALL FITTINGSELBOWS AND TEES180 DEG RETURN BENDS180 DEG RETURN BENDS180 DEG RETURN BENDSREDUCERSCAPS
NPSO.D. at Bevel (1), (2)I.D. at End
(1), (3), (4)
Wall Thickness (3)Centre-to-End Dimension A,B,C,MCentre-to-Centre OBack-to-Face KAlignment of Ends UOverall Length HOverall Length E
½ to 2½0.06
-0.03
0.03Not less than 87.5% of nominal thickness0.060.250.250.030.060.12
3 to 3 ½0.060.060.060.250.250.030.060.12
40.060.060.060.250.250.030.060.12
5 to 80.09
-0.06
0.060.060.250.250.030.060.25
10 to 180.16
-0.12
0.120.090.380.250.060.090.25
20 to 240.25
-0.19
0.190.090.380.250.060.090.25
26 to 300.25
-0.19
0.190.120.190.38
32 to 480.25
-0.19
0.190.190.190.38
NOMINAL PIPE SIZE NPSANGULARITY TOLERANCESANGULARITY TOLERANCESALL DIMENSIONS ARE GIVEN IN INCHES. TOLERANCES ARE EQUAL PLUS AND MINUS EXCEPT AS NOTED.
Off Angle QOff Plane P(1) Out-of-round is the sum of absolute values of plus and minus tolerance.
(2) This tolerance may not apply in localized areas of formed fittings where increased wall thickness is required to meet design requirements of ASME B16.9.
(3) The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser.
(4) Unless otherwise specified by the purchaser, these tolerances apply to the nominal inside diameter, which equals the difference between the nominal outside diameter and twice the nominal wall thickness.
½ to 40.030.06
5 to 80.060.12
10 to 120.090.19
14 to 160.090.25
18 to 240.120.38
26 to 300.190.38
32 to 420.190.50
44 to 480.180.75

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