262
API S PECIFICATION 6A
Table E.4
―Type 6BX Flanges for 10 ,000 psi
Dimensions in inches
FOOTNOTES
a Break sharp corner 0.03 in. max.
b Q’’ max. = E; Q’’ min. = 0.1 2 in.
c Optional feature.
d Test connection shall be 1 /2 in. NPT or per 9.3 (Figure 5).
e Ring groove shall be concentric with bore B within 0.01 0 in. diametrical runout. See Table E.1 1 for ring groove
dimensions.
f Test flange style applies to sizes 1 1 3/1 6 through 5 1 /8 only.
g Blind flange style applies to sizes 5 1 /8 through 21 1 /4 only.
h If the minimum value of J3 is exceeded, the maximum depth P of the counterbore may be increased by the same amount
or less.
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S PECIFICATION FOR W ELLHEAD AND TREE E QUIPMENT
Tabl e E . 4―T yp e 6B X F l a n g es for 1 0
Nominal
Size
Maximum
Bore
Outside
Diameter
of Flange
Tolerance
B
max.
OD
As noted
1 1 3/1 6
2 1 /1 6
2 9/1 6
3 1 /1 6
41 /1 6
5 1 /8
71 /1 6
9
11
1 3 5/8
1 6 3/4
1 8 3/4
21 1 /4
1 .84
2.09
2.59
3.09
4.09
5.1 6
7.09
9.03
1 1 .03
1 3.66
1 6.78
1 8.78
21 .28
7.38 ±0.06
7.88 ±0.06
9.1 2 ±0.06
1 0.62 ±0.06
1 2.44 ±0.06
1 4.06 ±0.06
1 8.88 ±0.1 2
21 .75 ±0.1 2
25.75 ±0.1 2
30.25 ±0.1 2
34.31 ±0.1 2
40.94 ±0.1 2
45.00 ±0.1 2
Nominal
Size
Radius
of Hub
Bolt
Circle
Tolerance
R
± 0.06
BC
N
See figure for GDT
13
1 /1 6
2 1 /1 6
2 9 /1 6
3 1 /1 6
41 /1 6
5 1 /8
71 /1 6
9
11
1 3 5/8
1 6 3 /4
1 8 3 /4
21 1 /4
0.38
0.38
0.38
0.38
0.38
038
0.62
0.62
0.62
0.62
0.75
0.62
0.81
5.75
6.25
7.25
8.50
1 0.1 9
1 1 .81
1 5.88
1 8.75
22.25
26.50
30.56
36.44
40.25
Diameter
Total
of
Thickness
Raised
Face
K
T
8
8
8
8
8
12
12
16
16
20
24
24
24
,000 psi (continued)
Max.
Chamfer
± 0.06
+0.1 2 /− 0
C
max.
4.1 2
4.38
5.1 9
6.00
7.28
8.69
1 1 .88
1 4.1 2
1 6.88
20.38
22.69
27.44
30.75
1 .66
1 .73
2.02
2.30
2.77
3.1 2
4.06
4.88
5.56
6.62
6.62
8.78
9.50
0.1 2
0.1 2
0.1 2
0.1 2
0.1 2
0.1 2
0.25
0.25
0.25
0.25
0.25
0.25
0.25
Number
of Bolts
Bolt
Size
and TPI
(Ref.)
3
/4-1 0
/4-1 0
7
/8-9
1 -8
1 1 /8-8
1 1 /8-8
1 1 /2-8
1 1 /2-8
1 3 /4-8
1 7/8-8
1 7/8-8
2 1 /4-8
2 1 /2-8
3
Dimensions in inches
Large
Small
Length
Hub
Hub
of Hub
Diameter Diameter
J1
+0 /− 0.1 2
J2
min.
J3
min.
3.50
3.94
4.75
5.59
7.1 9
8.81
1 1 .88
1 4.75
1 7.75
21 .75
25.81
29.62
33.38
2.56
2.94
3.62
4.34
5.75
7.1 9
1 0.00
1 2.88
1 5.75
1 9.50
23.69
26.56
30.00
1 .91
2.03
2.25
2.50
2.88
3.1 9
3.75
3.69
4.06
4.50
3.00
6.1 2
6.50
Bolt Holes
BH
Diameter
Tolerance
0.88
0.88
1 .00
1 .1 2
1 .25
1 .25
1 .62
1 .62
1 .88
2.00
2.00
2.38
2.62
263
+0.06/− 0.02
+0.06/− 0.02
+0.06/− 0.02
+0.06/− 0.02
+0.06/− 0.02
+0.06/− 0.02
+0.09/− 0.02
+0.09/− 0.02
+0.09/− 0.02
+0.09/− 0.02
+0.09/− 0.02
+0.09/− 0.02
+0.09/− 0.02
Counterbore
Depth
E
Ph
max.
max.
0.240
0.250
0.290
0.320
0.350
0.375
0.438
0.500
0.562
0.625
0.328
0.71 9
0.750
1 .89
2.02
2.42
2.83
3.45
3.86
―
―
―
―
―
―
―
Hub
Height
J4
min. h
―
―
―
―
―
0.25
0.38
0.38
0.56
0.69
1 .1 9
1 .00
1 .25
Ring
Groove
BX 1 51
BX 1 52
BX 1 53
BX 1 54
BX 1 55
BX 1 69
BX 1 56
BX 1 57
BX 1 58
BX 1 59
BX 1 62
BX 1 64
BX 1 66