API Ring Joint Flange Data
Service Pressure Ratings in P.S.I. – Other Dimensions in Inches
Nom. Size | Pressure Rating (P.S.I.) | Old Series Service | O.D. | Thickness | Dia. Bolt Circle | Bolt Quantity | Bolt Dia. | Pitch Di. | Ring No. | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Bolt Length | Stud Length | ||||||||||
1 13/16 | 10,000 | 7 3/8 | 1 21/32 | 5 3/4 | 8 | 3/4 | 5 1/4 | 3 5/8 | 3 1/16 | BX-151 | |
2 1/16 | 960 | 400 | 6 1/2 | 1 5/16 | 5 | 8 | 5/8 | 4 1/2 | 3 1/8 | 3 1/4 | R-23 |
2 1/16 | 2,000 | 600 | 6 1/2 | 1 5/16 | 5 | 8 | 5/8 | 4 3/4 | 3 3/4 | 3 1/4 | R-23 |
2 1/16 | 3,000 | 900 | 8 1/2 | 1 13/16 | 6 1/2 | 8 | 7/8 | 6 3/8 | 4 1/4 | 3 3/4 | R-24 |
2 1/16 | 5,000 | 1500 | 8 1/2 | 1 13/16 | 6 1/2 | 8 | 7/8 | 6 1/4 | 4 3/8 | 3 3/4 | R-24 |
2 1/16 | 10,000 | 7 7/8 | 1 47/64 | 6 1/4 | 8 | 3/4 | 5 1/2 | 3 5/8 | BX-152 | ||
2 9/16 | 960 | 400 | 7 1/2 | 1 7/16 | 5 7/8 | 8 | 3/4 | 5 1/4 | 4 | 4 | R-26 |
2 9/16 | 2,000 | 600 | 7 1/2 | 1 7/16 | 5 7/8 | 8 | 3/4 | 5 1/4 | 4 | 4 | R-26 |
2 9/16 | 3,000 | 900 | 9 5/8 | 1 15/16 | 7 1/2 | 8 | 1 | 7 | 4 7/8 | 4 1/4 | R-27 |
2 9/16 | 5,000 | 1500 | 9 5/8 | 1 15/16 | 7 1/2 | 8 | 1 | 6 7/8 | 4 1/4 | 4 1/4 | R-27 |
2 9/16 | 10,000 | 9 1/8 | 2 1/64 | 7 1/4 | 8 | 7/8 | 6 1/4 | 4 1/8 | BX-153 | ||
3 1/8 | 960 | 400 | 8 1/4 | 1 9/16 | 6 5/8 | 8 | 3/4 | 5 1/4 | 3 1/2 | 4 7/8 | R-31 |
3 1/8 | 2,000 | 600 | 8 1/4 | 1 9/16 | 6 5/8 | 8 | 3/4 | 5 1/2 | 4 1/4 | 4 7/8 | R-31 |
3 1/8 | 3,000 | 900 | 9 1/2 | 1 13/16 | 7 1/2 | 8 | 7/8 | 6 1/4 | 4 3/8 | 4 7/8 | R-31 |
3 1/8 | 5,000 | 1500 | 10 1/2 | 2 3/16 | 8 | 8 | 1 1/8 | 7 3/4 | 5 5/8 | 5 3/8 | R-35 |
3 1/16 | 10,000 | 10 5/8 | 2 19/64 | 8 1/2 | 8 | 1 | 7 1/4 | 4 7/8 | BX-154 | ||
4 1/16 | 960 | 400 | 10 | 1 11/16 | 7 7/8 | 8 | 7/8 | 5 3/4 | 4 | 5 7/8 | R-37 |
4 1/16 | 2,000 | 600 | 10 3/4 | 1 13/16 | 8 1/2 | 8 | 7/8 | 6 3/8 | 4 3/4 | 5 7/8 | R-37 |
4 1/16 | 3,000 | 900 | 11 1/2 | 2 1/16 | 9 1/4 | 8 | 1 1/8 | 7 3/8 | 5 1/4 | 5 7/8 | R-37 |
4 1/16 | 5,000 | 1500 | 12 1/4 | 2 7/16 | 9 1/2 | 8 | 1 1/4 | 8 1/2 | 5 7/8 | 6 3/8 | R-39 |
4 1/16 | 10,000 | 12 7/16 | 2 19/64 | 10 3/16 | 8 | 1 1/8 | 8 1/2 | 5 5/8 | BX-155 | ||
5 | 10,000 | 2900 | 14 1/4 | 4 3/16 | 11 | 8 | 1 5/8 | 12 3/4 | 8 1/4 | 6 1/8 | R-90 |
Nom. Size | Pressure Rating (P.S.I.) | Old Series Service | O.D. | Thickness | Dia. Bolt Circle | Bolt Quantity | Bolt Dia. | Pitch Di. | Ring No. | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Bolt Length | Stud Length | ||||||||||
7 1/16 | 960 | 400 | 12 1/2 | 1 15/16 | 10 5/8 | 12 | 7/8 | 6 1/4 | 4 1/4 | 8 5/16 | R-45 |
7 1/16 | 2,000 | 600 | 14 | 2 3/16 | 11 1/2 | 12 | 1 | 7 3/8 | 5 | 8 5/16 | R-45 |
7 1/16 | 3,000 | 900 | 15 | 2 1/2 | 12 1/2 | 12 | 1 1/8 | 8 1/2 | 5 5/8 | 8 5/16 | R-46 |
7 1/16 | 5,000 | 1500 | 15 1/2 | 3 5/8 | 12 1/2 | 12 | 1 3/8 | 11 1/4 | 7 1/4 | 8 5/16 | R-46 |
7 1/16 | 10,000 | 18 7/8 | 4 1/16 | 15 7/8 | 12 | 1 1/2 | 11 3/4 | 7 1/2 | BX-156 | ||
9 | 960 | 400 | 15 | 2 3/16 | 13 | 12 | 1 | 7 | 4 3/4 | 10 5/8 | R-49 |
9 | 2,000 | 600 | 16 1/2 | 2 1/2 | 13 3/4 | 12 | 1 1/8 | 8 1/2 | 5 7/8 | 10 5/8 | R-49 |
9 | 3,000 | 900 | 18 1/2 | 2 13/16 | 15 1/2 | 12 | 1 3/8 | 9 1/2 | 6 3/4 | 10 5/8 | R-49 |
9 | 5,000 | 1500 | 19 | 4 1/6 | 15 1/2 | 12 | 1 5/8 | 12 1/2 | 8 1/4 | 10 5/8 | R-50 |
9 | 10,000 | 21 3/4 | 4 7/8 | 18 3/4 | 16 | 1 1/2 | 13 1/4 | 8 1/2 | BX-157 | ||
11 | 960 | 400 | 17 1/2 | 2 7/16 | 15 1/4 | 16 | 1 1/8 | 7 3/4 | 5 | 12 3/4 | R-53 |
11 | 2,000 | 600 | 20 | 2 13/16 | 17 | 16 | 1 1/4 | 9 1/4 | 6 1/4 | 12 3/4 | R-53 |
11 | 3,000 | 900 | 21 1/2 | 3 1/16 | 18 1/2 | 16 | 1 3/8 | 10 | 6 3/4 | 12 3/4 | R-53 |
11 | 5,000 | 1500 | 23 | 4 11/16 | 19 | 12 | 1 7/8 | 14 1/2 | 9 3/8 | 12 3/4 | R-54 |
11 | 10,000 | 25 3/4 | 5 9/16 | 22 1/4 | 16 | 1 3/4 | 15 3/8 | 9 5/8 | BX-158 | ||
13 5/8 | 960 | 400 | 20 1/2 | 2 9/16 | 17 3/4 | 16 | 1 1/4 | 8 1/2 | 5 11/16 | 15 | R-57 |
13 5/8 | 2,000 | 600 | 22 | 2 15/16 | 19 1/4 | 20 | 1 1/4 | 9 1/2 | 6 1/2 | 15 | R-57 |
13 5/8 | 3,000 | 900 | 24 | 3 7/16 | 21 | 20 | 1 3/8 | 10 3/4 | 7 1/4 | 15 | R-57 |
13 5/8 | 5,000 | 1500 | 26 1/2 | 4 7/16 | 23 1/4 | 16 | 1 5/8 | 12 3/4 | 8 1/4 | BX-160 | |
13 5/8 | 10,000 | 30 1/4 | 6 /58 | 26 1/2 | 20 | 1 7/8 | 17 3/4 | 70 7/8 | BX-159 | ||
14 | 5,000 | 1500 | 29 1/2 | 5 7/8 | 25 | 16 | 2 1/4 | 18 | 11 3/4 | 16 1/2 | R-63 |
16 3/4 | 2,000 | 600 | 27 | 3 5/16 | 23 3/4 | 20 | 1 1/2 | 10 3/4 | 7 1/2 | 18 1/2 | R-66 |
16 3/4 | 3,000 | 900 | 27 3/4 | 3 15/16 | 24 1/4 | 20 | 1 5/8 | 12 1/2 | 8 1/4 | 18 1/2 | R-66 |
21 1/4 | 2,000 | 600 | 32 | 3 7/8 | 28 1/2 | 24 | 1 5/8 | 12 1/2 | 8 1/4 | 23 | R-73 |
20 3/4 | 3,000 | 900 | 33 3/4 | 4 3/4 | 29 1/2 | 20 | 2 | 15 1/4 | 10 1/8 | 23 | R-74 |