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FLANGES – DIMENSIONS OF WELDING ENDS ASME B16.5

Bevel for wall thicknesses (t) from 0.19″ to 0.88″, inclusive. Bevel for wall thicknesses (t) greater than 0.88″
Nominal
Pipe
Size		 Wall Thickness(t) Inside Diameter Identification Nominal
Pipe
Size		 Wall Thickness(t) Inside Diameter Identification
in. mm in. mm Std.*
XH;XXH		 Schedule
Nr.		 in. mm in. mm Std.*
XH;XXH		 Schedule
Nr.
1/2″ 0.109
0.147
0.188
0.294		 2.8
3.7
4.8
7.5		 0.622
0.546
0.464
0.252		 15.8
13.9
11.8
6.4		 Std.
XHXXH		 40
80
160		 5” 0.258
0.375
0.500
0.625
0.750		 6.6
9.5
12.7
15.9
19.1		 5.047
4.813
4.563
4.313
4.063		 128.2
122.3
115.9
109.6
103.2		 Std.
XH		 40
80
120
160
¾” 0.113
0.154
0.219
0.308		 2.9
3.9
5.6
7.8		 0.824
0.742
0.612
0.434		 20.9
18.8
15.5
11.0		 Std.
XHXXH		 40
80
160		 6” 0.280
0.432
0.562
0.719
0.864		 7.1
11.0
14.3
18.3
21.9		 6.065
5 761
5 501
5 189
4.897		 154.1
146.3
139.7
131.8
124.4		 Std.
XHXXH		 40
80
120
160
1” 0.133
0.179
0.250
0.358		 3.4
4.5
6.4
9.1		 1.049
0.957
0.815
0.599		 26.6
24.3
20.7
15.2		 Std.
XHXXH		 40
80
160		 8” 0.250
0.277
0.322
0.406
0.500
0.594
0.719
0.812
0.875
0.906		 6.4
7.0
8.2
10.3
12.7
15.1
18.3
20.6
22.2
23.0		 8.125
8.071
7.981
7.813
7.625
7.439
7.189
7.001
6.875
6.813		 206.4
205.0
202.7
198.5
193.7
189.0
182.6
177.8
174.6
173.1		 Std.

XH

XXH

 20
30
40
60
80
100
120
140160
1 ¼” 0.140
0.191
0.250
0.382		  3.4
4.9
6.4
9.7		 1.380
1.278
1.160
0.896		 35.1
32.5
29.5
22.8		 Std.
XHXXH		 40
80
160		 10” 0.250
0.307
0.365
0.500
0.594
0.719
0.844
1.000
1.125		 6.4
7.8
9.3
12.7
15.1
18.3
21.4
25.4
28.6		 10.250
10.136
10.020
9.750
9.564
9.314
9.064
8.750
8.500		 260.4
257.5
254.5
247.7
242.9
236.6
230.2
222.3
215.9		 Std.
XHXXH		 20
30
40
60
80
100
120
140
160
1 ½” 0.145
0.200
0:281
0.400		 3.7
5.1
7.1
10.2		 1.610
1.500
1.338
1.100		  40.9
38.1
34.0
27.9		 Std.
XHXXH		 40
80
160
2″ 0.154
0.218
0.344
0.436		 3.9
5.5
8.7
11.1		 2.067
1.939
1.687
1.503		 52.5
49.3
42.8
38.2		 Std.
XHXXH		 40
80
160
21/2“ 0.203
0.276
0.375
0.552		 5.2
7.0
9.5
14.0		 2.469
2.323
2.125
1.771		 62.7
59.0
54.0
45.0		 Std.
XHXXH		 40
80
160
3 0.216
0.300
0.438
0.600		 5.5
7.6
11.1
15.2		 3.068
2.900
2.624
2.300		 77.9
73.7
66.6
58 4		 Std.
XHXXH		 40
80
160
3 ½ 0.226
0.318		 5.7
8.1		 3.548
3.364		 90.1
85.4		 Std.
XH		 40
80
4″ 0.237
0.337
0.438
0.531
0.674		 6.0
8.6
11.1
13.5
17.1		 4.026
3.826
3.624
3.438
3.152		 102.3
97.2
92.0
87.3
80.1		 Std.
XHXXH		 40
80
120
160
PIPELINE HUB
In addition, when the minimum yield strength of the hub portion of any
flange or its representative test specimen is less than that specified
for the pipe to be matched, the minimum thickness of the hub at the
welding end shall be such that the product of its thickness times its
yield strength (at welding end) shall at least equal the product of the
specified nominal wall thickness and minimum specified yield strength
of the pipe to be matched. Under these conditions, sizes NPS 24 and
smaller flanges may also have a single taper hub and the outside
diameter of the hub at the base may be modified in accordance with
ASME Section VIII Division 1 Appendix 2 calculations.

 

Nominal
Pipe
Size		 Wall Thickness(t) Inside Diameter Identification Nominal
Pipe
Size		 Wall Thickness(t) Inside Diameter Identification
in. mm in. mm Std.*
XH;XXH		 Schedule
Nr.		 in. mm in. mm Std.*
XH;XXH		 Schedule
Nr.
12” 0.250
0.330
0.375
0.406
0.500
0.562
0.688
0.844
1.000
1.125
1.312		 6.4
8.4
9.5
10.3
12.7
14.3
17.5
21.4
25.4
28.6
33.3		 12.250
12.090
12.000
11.938
11.750
11.626
11.376
11.064
10.750
10.500
10.126		 311.2
307.1
304.8
303.2
298.5
295.3
289.0
281.0
273.1
266.7
257.2		 Std.

XH

XXH

 20
304060
80
100
120
140
160		 24”  0.250
0.375
0.500
0.562
0.688
0.969
1.219
1.531
1.812
2.062
2.344		 6.4
9.5
12.7
14.3
17.5
24.6
31.0
38.9
46.0
52.4
59.5		 23.500
23.250
23.000
22.876
22.626
22.064
21.564
20.938
20.376
19.876
19.314		 596.9
590.6
584.2
581.1
574.7
560.4
547.7
531.8
517.6
504.9
490.6		 Std.
XH		 10
2030
40
60
80
100
120
140
160
14” 0.250
0.312
0.375
0.438
0.500
0.594
0.750
0.938
1.094
1.250
1.406		  6.4
7.9
9.5
11.1
12.7
15.1
19.1
23.8
27.8
31.8
35.7		 13.500
13.376
13.250
13.124
13.000
12.814
12.500
12.126
11.814
11.500
11.188		 342.9
339.8
336.6
333.3
330.2
325.5
317.5
308.0
300.1
292.1
284.2		 Std.

XH

 10
20
30
4060
80
100
120
140
160		 26” 0.312
0.375
0.500		 7.9
9.5
12.7		 25.376
25.250
25.000		 644.6
641.4
635.0		 Std.
XH		 10

20
16” 0.250
0.312
0.375
0.500
0.656
0.844
1.031
1.219
1.438
1.594		 6.4
7.9
9.5
12.7
16.7
21.4
26.2
31.0
36.5
40.5		 15.500
15.376
15.250
15.000
14.688
14.314
13.938
13.564
13.124
12.814		 393.7
390.6
387.4
381.0
373.1
363.6
354.0
344.5
333.3
325.5		 Std.
XH		 10
20
30
40
60
80
100
120
140
160		 28” 0.312
0.375
0.500
0.625		 7.9
9.5
12.7
15.9		 27.376
27.250
27.000
26.750		 695.4
692.2
685.8
679.5		 Std.
XH		 10

20
30
18“ 0.250
0.312
0.375
0.438
0.500
0.562
0.750
0.938
1.156
1.375
1.562
1.781		 6.4
7.9
9.5
11.1
12.7
14.3
19.1
23.8
29.4
34.9
39.7
45.2		 17.500
17.376
17.250
17.124
17.000
16.876
16.500
16.126
15.688
15.250
14.876
14.438		 444.5
441.4
438.2
434.9
431.8
428.7
419.1
409.6
398.5
387.4
377.9
366.7		 Std.

XH

 10
203040
60
80
100
120
140
160		 30“ 0.312
0.375
0.500
0.625		 7.9
9.5
12.7
15.9		 29.376
29.250
29.000
28.750		 746.2
743.0
736.6
730.3		 Std.
XH		 10

20
30
20” 0.250
0.375
0.500
0.594
0.812
1.031
1.281
1.500
1.750
1.969		 6.4
9.5
12.7
15.1
20.6
26.2
32.5
38.1
44.5
50.0		 19.500
19.250
19.000
18.814
18.376
17.938
17.438
17.000
16.500
16.064		 495.3
489.0
482.6
477.9
466.8
455.6
442.9
431.8
419.1
408.0		 Std.
XH		 10
20
30
40
60
80
100
120
140
160		 32” 0.312
0.375
0.500
0.625
0.688		 7.9
9.5
12.7
15.9
17.5		 31.376
31.250
31.000
30.750
30.624		 797.0
793.8
787.4
781.1
777.8		 Std.
XH		 10

20
30
40
34” 0.312
0.375
0.500
0 625
0.688		 7.9
9.5
12.7
15.9
17.5		 33.376
33.250
33.000
32.750
32.624		 847.8
844.6
838.2
831.9
828.6		 Std.
XH		 10

20
30
40
36” 0.312
0.375
0.500
0.625
0.750		 7.9
9.5
12.7
15.9
19.1		 35.376
35.250
35.000
34.750
34.500		 898.6
895.4
889.0
882.7
876.3		 Std.
XH		 10

20
30
40
38” 0.375
0.500		 9.5
12.7		 37.250
37.000		 946.2
939.8		 Std.
XH
40” 0.375
0.500		 9.5
12.7		 39.250
39.000		 997.0
990.6		 Std.
XH
42” 0.375
0.500		 9.5
12.7		 41.250
41.000		 1047.8
1041.4		 Std.
XH
44”  0.375
0.500		 9.5
12.7		 43.250
43.000		 1098.6
1092.2		 Std.
XH
46” 0.375
0.500		 9.5
12.7		 45.250
45.000		 1149.4
1143.0		 Std.
XH
48” 0.375
0.500		 9.5
12.7		 47.250
47.000		 1200.2
1193.8		 Std.
XH

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