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Wellhead Data

Flanges with Ring Grooves – API Specifications

Series 600 (2000 psi)
Nominal Flange Size Actual Flange Size Flange OD Flange Thickness Bolt Circle Diam # of Bolts Size of Bolts Length of Bolts Diam Ring Groove Ring #
6"
8"
10"
12"		 7 1/16"
9"
11"
13 5/8"		 14"
16 1/2"
20"
22"		 2 3/16"
2 1/2"
2 13/16"
2 15/16"		 11 1/2"
13 3/4"
17"
19 1/4"		 12
12
16
20		 1"
1 1/8"
1 1/4"
1 1/4"		 7 3/8"
8 3/8"
9 1/4"
9 1/2"		 8 5/16"
10 5/8"
12 3/4"
15"		 R45
R49
R53
R57
Series 900 (3000 psi)
Nominal Flange Size Actual Flange Size Flange OD Flange Thickness Bolt Circle Diam # of Bolts Size of Bolts Length of Bolts Diam Ring Groove Ring #
6"
8"
10"
12"		 7 1/16"
9"
11"
13 5/8"		 15"
18 1/2"
21 1/2"
24"		 2 1/2"
2 13/16"
3 1/16"
3 7/16"		 12 1/2"
15 1/2"
18 1/2"
21"		 12
12
16
20		 1 1/8"
1 3/8"
1 3/8"
1 3/8"		 8 3/8"
9 1/2"
10"
10 3/4"		 8 5/16"
10 5/8"
12 3/4"
15"		 R45
R49
R53
R57
Series 1500 (5000 psi)
Nominal Flange Size Actual Flange Size Flange OD Flange Thickness Bolt Circle Diam # of Bolts Size of Bolts Length of Bolts Diam Ring Groove Ring #
6"
8"
10"
12"		 7 1/16"
9"
11"
13 5/8"		 15 1/2"
19"
23"
26 1/2"		 3 5/8"
4 1/16"
4 11/16"
5 7/16"		 12 1/2"
15 1/2"
19"
22 1/2"		 12
12
12
16		 1 3/8"
1 5/8"
1 7/8"
2"		 11 1/4"
12 1/2"
14 3/8"
16 7/8"		 8 5/16"
10 5/8"
12 3/4"
15"		 R46
R50
R54
R58
10,000 psi API Working Pressure
15,000 psi Test Pressure
Flange Size Flange OD Flange Thickness Bolt Circle Diam # of Bolts Size of Bolts Length of Bolts Ring #
7 1/16"
9"
11"
13 5/8"		 18 7/8"
21 3/4"
25 3/4"
30 1/4"		 4 1/16"
4 7/8"
5 9/16"
6 5/8"		 15 7/8"
18 3/4"
22 1/4"
26 1/2"		 12
16
16
20		 1 1/2"
1 1/2"
1 3/4"
1 7/8"		 11 1/4"
13"
15"
17 1/4"		 BX156
BX157
BX158
BX159