Oil States HydroTech
Subsea Pipeline Technology
since 1966
Swivel-Ring Flange
Facilitates bolt-hole alignment
API 6H-0001
The Swivel-Ring Flange permits 360° rotation of an outer ring
around a hub, to allow easy alignment of bolt holes when
attaching to a mating standard flange. For subsea applications,
this capability is important when only a single diver is available
to align and make up the flange connection.
Swivel-Ring Flanges can be designed for any size and pressure
rating to meet applicable dimensions and gasket types of any
recognized flange specification, such as ASME B16.5, API 6A or
MSS SP-44. Nonstandard Swivel-Ring Flanges can also be custom-designed for certain applications; for example, applications
involving large pipelines may incorporate features such as hub
face profiles to aid axial alignment and Teflon rings between the
SRF ring and hub to reduce rotational friction.
Swivel-Ring Flanges are available from stock in diameters from
4 inches through 24 inches, in both 600 and 900 ANSI ratings.
Up through 16-inch, SRFs are stocked with schedule 80 bores;
20-inch and 24-inch have schedule 60 bores. The material for
inventory SRF hubs is ASTM A694, grade F52. For reference,
dimensional data for most ANSI and MSS RTJ Swivel-Ring
Flanges are given in the tables on the back of this sheet.
Design Specifications
Swivel-Ring Flanges meet the requirements of API 6H and are
designed in accordance with ASME Pressure Vessel Code, Section
VIII, Division 2, unless otherwise specified, and applicable sections of the flange specification to which it will mate.
Ordering Information
Please provide the following information on any purchase order
or request for quotation:
• Nominal pipe size
• Pipe wall thickness or bore
• Pipe grade
• Design rating
• Specification of mating flange
• Gasket type
3-inch through 24-inch Swivel-Ring Flanges are kept in inventory, in
a wide range of ANSI and MSS ratings.
© 2002 Oil States Industries Incorporated
w w w. o i l s t a t e s hy d r o t e c h . c o m
MAIN OFFICES
13111 Northwest Freeway
Suite 200
Houston, Texas 77040
Ph 713 510 2200
Fx 713 688 9166
email hydrotech@oilstates.com
SALES OFFICE
Blackness Road
Altens Industrial Estate
Aberdeen AB12 3LH
Scotland
Ph (44) 1224 896190
Fx (44) 1224 896199
SALES OFFICE
No. 9 Pandan Crescent
Singapore 128465
Ph (65) 6773 7555
Fx (65) 6773 7667
SALES OFFICE
36, Bd des Oceans
13275 Marseille Cedex 9
France
Ph (33) 491 29 18 33
Fx (33) 491 29 18 43
Swivel-Ring Flange, Page 2
Y
Ring
C
O (diameter)
Retainer
ring
Hub
Bore as specified
Swivel-Ring Flange Specifications
Nominal
pipe size,
inches
O
inches
Y
inches
C
inches
Stud
quantity
Stud
size,
inches
Stud
length,
inches
Ring
gasket
Approx
weight,
lb
Nominal
pipe size,
inches
O
inches
150 ANSI and MSS Swivel-Ring Flange
3
4
6
8
10
12
14
16
18
20
24
26
28
30
32
34
36
42
8.50
9.00
11.00
13.50
16.00
19.00
21.00
23.50
25.00
27.50
32.00
34.25
36.50
38.75
41.75
43.75
46.00
53.00
3.75
3.50
3.63
4.25
4.75
5.38
5.63
6.38
6.25
6.75
7.38
8.13
8.75
8.75
10.00
10.25
10.50
11.75
1.69
1.81
2.06
2.44
2.75
2.69
3.00
3.38
3.69
3.94
4.44
4.88
5.19
5.19
6.19
6.50
6.56
6.81
8
8
8
8
12
12
12
16
16
20
20
24
28
28
28
32
32
36
0.625
0.625
0.750
0.750
0.875
0.875
1.000
1.000
1.125
1.125
1.250
1.250
1.250
1.250
1.500
1.500
1.500
1.500
4.75
5.00
5.50
6.00
6.75
6.50
7.25
7.75
8.50
8.75
10.00
11.00
11.25
11.50
13.00
13.50
13.75
14.25
9.00
10.00
12.50
15.50
17.50
20.00
23.00
25.50
28.00
30.50
36.00
38.25
40.75
43.00
45.25
47.50
50.00
50.75
3
4
6
8
10
12
14
16
18
20
24
26
28
30
32
34
36
42
8.25
10.00
12.50
15.00
17.50
20.50
23.00
25.50
28.00
30.50
36.00
38.25
40.75
43.00
45.25
47.50
50.00
52.00
4.13
3.75
4.75
5.38
5.75
6.38
8.00
8.25
8.63
8.88
10.50
11.88
12.38
13.00
13.50
13.38
15.13
11.00
2.06
2.00
2.38
2.75
3.50
3.68
4.06
4.56
4.75
4.69
5.69
6.81
6.94
7.50
8.13
8.00
9.13
7.94
8
8
12
12
16
16
20
20
24
24
24
28
28
28
28
28
32
32
0.750
0.750
0.875
0.875
1.000
1.125
1.125
1.250
1.250
1.250
1.500
1.625
1.625
1.750
1.875
1.875
2.000
1.625
6.00
5.75
7.25
7.25
8.50
9.00
9.50
10.50
10.75
11.00
13.50
14.25
14.75
15.75
17.00
17.00
18.50
16.75
R-33
R-36
R-43
R-48
R-52
R.56
R-59
R-64
R-68
R-76
Special
Special
Special
Special
Special
Special
Special
Special
25
25
35
65
95
140
180
250
265
335
505
575
695
760
1050
1155
1300
1795
3
4
6
8
10
12
14
16
18
20
24
26
28
30
32
34
36
42
8.25
10.75
14.00
16.50
20.00
22.00
23.75
27.00
29.25
32.00
37.00
40.00
42.25
44.50
47.00
49.00
51.75
55.25
2.13
2.31
2.75
3.25
3.81
4.19
44.63
5.00
5.25
5.75
6.81
7.50
8.25
8.81
8.69
8.56
9.13
9.75
8
8
12
12
16
16
20
20
24
24
24
28
28
28
28
28
32
32
0.750
0.875
0.875
1.000
1.125
1.250
1.250
1.375
1.375
1.500
1.750
1.750
1.875
2.000
2.000
2.000
2.000
1.875
6.00
6.50
7.25
8.25
9.25
10.00
10.50
11.25
11.75
12.75
14.75
15.75
16.50
18.00
18.25
18.25
19.00
20.00
Stud
quantity
Stud
size,
inches
Stud
length,
inches
Ring
gasket
Approx
weight,
lb
3.63
4.50
5.50
6.25
8.13
8.75
9.50
10.00
10.50
11.38
12.63
14.00
14.63
16.00
16.13
16.13
17.25
16.00
2.13
2.31
3.13
3.44
4.50
4.81
5.25
5.81
6.00
6.75
7.69
8.44
8.88
10.00
9.88
9.75
11.19
11.75
8
8
12
12
16
20
20
20
20
24
24
28
28
28
28
28
28
28
0.750
0.875
1.000
1.125
1.250
1.250
1.250
1.500
1.625
1.625
1.875
1.875
2.000
2.000
2.250
2.250
2.500
2.500
6.00
6.75
8.00
8.75
10.50
11.00
11.00
13.00
13.50
14.75
16.75
17.50
18.25
19.75
20.25
20.25
22.25
24.75
R-31
R-37
R-45
R-49
R-53
R-57
R-57
R-65
R-69
R-73
R-77
R-93
R-94
R-95
R-96
R-97
R-98
Special
25
50
105
155
295
370
370
630
750
965
1370
1760
2010
2460
2650
2805
3440
3295
R-31
R-37
R-45
R-49
R-53
R-57
R-62
R-66
R-70
R-70
R-78
R-100
R101
R-102
R-103
R-104
R-105
Special
40
70
150
275
410
550
655
745
1045
1045
2455
2680
3365
3705
4335
5545
6060
6320
R-35
R-39
R-46
R-50
R-54
R-58
R-63
R-67
R-71
R-75
R-79
65
95
195
380
675
1005
1415
1900
2485
3160
5200
R-32
R-38
R-47
R-51
R-55
R-60
120
180
430
595
1135
1545
900 ANSI and MSS Swivel-Ring Flange
R-34
R-37
R-45
R-49
R-53
R-57
R-61
R-65
R-69
R-73
R-77
R-93
R-94
R-95
R-96
R-97
R-98
Special
30
35
65
100
150
215
330
420
515
595
975
1240
1450
1680
1925
2050
2555
1465
3
4
6
8
10
12
14
16
18
20
24
26
28
30
32
34
36
42
9.50
11.50
15.00
18.50
21.50
24.00
25.25
27.75
31.00
33.75
41.00
42.75
46.00
48.50
51.75
55.00
57.50
61.50
4.50
5.25
6.88
8.25
9.00
10.00
11.25
10.88
12.25
13.00
16.25
17.00
18.13
18.50
19.75
21.25
21.63
21.50
R-31
R-37
R-45
R-49
R-53
R-57
R-61
R-65
R-69
R-73
R-77
R-93
R-94
R-95
R-96
R-97
R-98
Special
25
40
65
110
160
235
355
450
550
685
1090
1315
1600
1845
2020
2155
2555
2000
3
4
6
8
10
12
14
16
18
20
24
10.50
12.25
15.50
19.00
23.00
26.50
29.50
32.50
36.00
38.75
46.00
5.25
6.00
7.88
10.13
12.13
13.88
15.75
17.38
18.88
20.50
24.00
400 ANSI and MSS Swivel-Ring Flange
3.63
3.88
4.88
5.38
6.13
6.50
8.13
8.63
9.00
9.50
11.13
12.25
13.00
13.88
14.00
13.88
15.13
12.63
C
inches
600 ANSI and MSS Swivel-Ring Flange
300 ANSI and MSS Swivel-Ring Flange
3
4
6
8
10
12
14
16
18
20
24
26
28
30
32
34
36
42
Y
inches
2.38
3.06
3.75
4.56
5.19
5.75
6.31
6.50
7.38
7.94
10.19
10.69
11.75
11.50
12.44
13.56
13.50
14.25
8
8
12
12
16
20
20
20
20
20
20
20
20
20
20
20
20
24
0.875
1.125
1.125
1.375
1.375
1.375
1.500
1.625
1.875
1.875
2.500
2.750
3.000
3.000
3.250
3.500
3.500
3.500
6.75
8.25
9.00
11.00
11.75
12.75
13.75
14.50
16.50
16.50
22.00
23.50
25.00
25.00
27.25
29.00
29.00
33.25
1500 ANSI Swivel-Ring Flange
3.19
3.56
4.56
5.88
7.13
8.25
9.31
10.44
11.13
12.38
14.50
8
8
12
12
12
16
16
16
16
16
16
1.125
1.250
1.375
1.625
1.875
2.000
2.250
2.500
2.750
3.000
3.500
8.00
9.00
11.50
14.00
16.25
18.50
20.50
22.75
24.75
27.25
31.50
2500 ANSI Swivel-Ring Flange
3
4
6
8
10
12
12.00
14.00
19.00
21.75
26.50
30.00
7.50
8.63
10.88
12.13
15.25
16.63
4.31
4.88
6.31
6.88
8.94
9.38
8
8
8
12
12
12
1.250
1.500
2.000
2.000
2.500
2.750
10.75
12.25
16.25
17.50
22.50
24.00
© 2002 Oil States Industries Incorporated