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ASME B16.9 - Dimensions and tolerances

Ø NPS Ø DN
1/2 15

Outside Diameter
Ø D:21,3 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:25 +/-3

Limit thickness for length E
4,57

Length
E1:25 +/-3
3/4 20

Outside Diameter
Ø D:26,7 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:25 +/-3

Limit thickness for length E
3,81

Length
E1:25 +/-3
1 25

Outside Diameter
Ø D:33,4 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:38 +/-3

Limit thickness for length E
4,57

Length
E1:38 +/-3
1 1/4 32

Outside Diameter
Ø D:42,2 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:38 +/-3

Limit thickness for length E
4,83

Length
E1:38 +/-3
1 1/2 40

Outside Diameter
Ø D:48,3 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:38 +/-3

Limit thickness for length E
5,08

Length
E1:38 +/-3
2 50

Outside Diameter
Ø D:60,3 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:38 +/-3

Limit thickness for length E
5,59

Length
E1:44 +/-3
2 1/2 65

Outside Diameter
Ø D:73,0 +1,6/-0,8

Internal diameter
(O.D.-2xW.T.):+/- 0,8

Length
E:38 +/-3

Limit thickness for length E
7,11

Length
E1:51 +/-3
3 80

Outside Diameter
Ø D:88,9 +1,6/-1,6

Internal diameter
(O.D.-2xW.T.):+/-1,6

Length
E:51 +/-3

Limit thickness for length E
7,62

Length
E1:64 +/-3
3 1/2 90

Outside Diameter
Ø D:101,6 +1,6/-1,6

Internal diameter
(O.D.-2xW.T.):+/-1,6

Length
E:64 +/-3

Limit thickness for length E
8,13

Length
E1:76 +/-3
4 100

Outside Diameter
Ø D:114,3 +1,6/-1,6

Internal diameter
(O.D.-2xW.T.):+/-1,6

Length
E:64 +/-3

Limit thickness for length E
8,64

Length
E1:76 +/-3
5 125

Outside Diameter
Ø D:141,3 +2,4/-1,6

Internal diameter
(O.D.-2xW.T.):+/-1,6

Length
E:76 +/-6

Limit thickness for length E
9,65

Length
E1:89 +/-6
6 150

Outside Diameter
Ø D:168,3 +2,4/-1,6

Internal diameter
(O.D.-2xW.T.):+/-1,6

Length
E:89 +/-6

Limit thickness for length E
10,92

Length
E1:102 +/-6
8 200

Outside Diameter
Ø D:219,1 +2,4/-1,6

Internal diameter
(O.D.-2xW.T.):+/-1,6

Length
E:102 +/-6

Limit thickness for length E
12,70

Length
E1:127 +/-6
10 250

Outside Diameter
Ø D:273,0 +4,0/-3,2

Internal diameter
(O.D.-2xW.T.):+/-3,2

Length
E:127 +/-6

Limit thickness for length E
12,70

Length
E1:152 +/-6
12 300

Outside Diameter
Ø D:323,8 +4,0/-3,2

Internal diameter
(O.D.-2xW.T.):+/-3,2

Length
E:152 +/-6

Limit thickness for length E
12,70

Length
E1:178 +/-6
14 350

Outside Diameter
Ø D:355,6 +4,0/-3,2

Internal diameter
(O.D.-2xW.T.):+/-3,2

Length
E:165 +/-6

Limit thickness for length E
12,70

Length
E1:191 +/-6
16 400

Outside Diameter
Ø D:406,4 +4,0/-3,2

Internal diameter
(O.D.-2xW.T.):+/-3,2

Length
E:178 +/-6

Limit thickness for length E
12,70

Length
E1:203 +/-6
18 450

Outside Diameter
Ø D:457,0 +4,0/-3,2

Internal diameter
(O.D.-2xW.T.):+/-3,2

Length
E:203 +/-6

Limit thickness for length E
12,70

Length
E1:229 +/-6
20 500

Outside Diameter
Ø D:508,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:229 +/-6

Limit thickness for length E
12,70

Length
E1:254 +/-6
22 550

Outside Diameter
Ø D:559,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:254 +/-6

Limit thickness for length E
12,70

Length
E1:254 +/-6
24 600

Outside Diameter
Ø D:610,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-6

Limit thickness for length E
12,70

Length
E1:305 +/-6
26 650

Outside Diameter
Ø D:660,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
28 700

Outside Diameter
Ø D:711,2 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
30 750

Outside Diameter
Ø D:762,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
32 800

Outside Diameter
Ø D:813,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
34 850

Outside Diameter
Ø D:864,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
36 900

Outside Diameter
Ø D:914,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:267 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
38 950

Outside Diameter
Ø D:965,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:305 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
40 1000

Outside Diameter
Ø D:1016,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:305 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
42 1050

Outside Diameter
Ø D:1067,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:305 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
44 1100

Outside Diameter
Ø D:1118,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:343 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
46 1150

Outside Diameter
Ø D:1168,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:343 +/-10

Limit thickness for length E
…

Length
E1:… +/-10
48 1200

Outside Diameter
Ø D:1219,0 +6,4/-4,8

Internal diameter
(O.D.-2xW.T.):+/-4,8

Length
E:343 +/-10

Limit thickness for length E
…

Length
E1:… +/-10

Unless otherwise indicated, dimensions are in mm. A minimum wall thickness of 87.5% applies unless the purchaser specifies a different wall thickness tolerance. Out of round is the sum of absolute values of plus and minus tolerances. The shape of these caps shall be ellipsoidal and shall conform to the requirements given in the ASME Boiler and Pressure Vessel Code. Length E applies for thickness not exceeding that given in column “Limiting all Thickness for length E”. Length E1 applies for thickness greater than that given in column “Limiting all Thickness for length E”. For NPS 26 and larger, length E1 shall be by agreement between the manufacturer and purchaser.


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