Description of API Flange, API 6A Flange
API 6A Flange Manufacturer antong supplies API 6A Flange according to API 6A, API flange in forged steel, Stainless Steel, Carbon steel etc. include type of blind, target, threaded, weld-neck and adapter flanges,conform to API 6A specifications.
Type 6B flanges: Type 6B flanges are of the ring joint type and are not designed for face-to-face make-up. The connection make-up bolting force reacts on the metallic ring gasket. Type 6B flanges are of through bolted or studded design. Dimensions for 6B flanges blind type shall conform to Table 36, Table 37 & Table 38 with reference to figure no. 8 on pg. no. 108 of API 6A (19 th Edition, July 2004) as applicable.
Type 6BX flanges: Type 6BX flanges are of the ring joint type and designed with a raised face. Depending on the tolerances, the connection make-up bolting force may react on the raised face of the flange when the gasket has been properly seated. This support prevents damage to the flange or gasket from excessive bolt torque. Therefore, one of the flanges in 6 BX connection shall have a raised face. Type 6BX flanges are of through bolted or studded design. Face-to-face contact is not necessary for the proper functioning of the 6BX flange. Dimensions for 6BX flanges blind type shall conform to Table 46 of API 6A (19 th Edition, July 2004) as applicable.
Specification of API Flange, API 6A Flange
| Flange Size |
Working Pressure (PSI) |
Outside Diameter |
Number of Bolt Holes |
Diameter of Bolt Holes |
Length of Bolts |
API Ring Gasket |
1-13/16" |
10,000 |
7-3/8" |
8 |
3/4" |
5-1/4" |
BX-151 |
1-13/16" |
15,000 |
8-3/16" |
8 |
7/8" |
6" |
BX-151 |
1-13/16" |
20,000 |
10-1/8" |
8 |
1" |
7-3/4" |
BX-151 |
2-1/16" |
2,000 |
6-1/2" |
8 |
5/8" |
5/8" |
R-23 |
2-1/16" |
3,000/5,000 |
8-1/2" |
8 |
7/8" |
7/8" |
R-24 |
2-1/16" |
10,000 |
7-7/8" |
8 |
3/4" |
3/4" |
BX-152 |
2-1/16" |
15,000 |
8-3/4" |
8 |
7/8" |
7/8" |
BX-152 |
2-1/16" |
20,000 |
11-5/16" |
8 |
1-1/8" |
1-1/8" |
BX-152 |
2-9/16" |
2,000 |
7-1/2" |
8 |
3/4" |
5-1/4" |
R-26 |
2-9/16" |
3,000/5,000 |
9-5/8" |
8 |
1" |
7" |
R-27 |
2-9/16" |
10,000 |
9-1/8" |
8 |
7/8" |
6-1/4" |
BX-153 |
2-9/16" |
15,000 |
10" |
8 |
1" |
7" |
BX-153 |
2-9/16" |
20,000 |
12-13/16" |
8 |
1-1/4" |
9-1/2" |
BX-153 |
3-1/8" |
2,000 |
8-1/4" |
8 |
3/4" |
5-1/2" |
R-31 |
3-1/8" |
3,000 |
9-1/2" |
8 |
7/8" |
6-1/4" |
R-31 |
3-1/8" |
5,000 |
10-1/2" |
8 |
1-1/8" |
7-3/4" |
R-35 |
3-1/16" |
10,000 |
10-5/8" |
8 |
1" |
7-1/4" |
BX-154 |
3-1/16" |
15,000 |
11-5/16" |
8 |
1-1/8" |
8" |
BX-154 |
3-1/16" |
20,000 |
14-1/16" |
8 |
1-3/8" |
10-3/4" |
BX-154 |
4-1/16" |
2,000 |
10-3/4" |
8 |
7/8" |
6-1/4" |
R-37 |
4-1/16" |
3,000 |
11-1/2" |
8 |
1-1/8" |
7-1/2" |
R-37 |
4-1/16" |
5,000 |
12-1/4" |
8 |
1-1/8" |
8-3/8" |
BX-155 |
4-1/16" |
20,000 |
17-9/16" |
8 |
1-3/4" |
12-3/4" |
BX-155 |
5-1/8" |
5,000 |
14-3/4" |
8 |
1-1/2" |
10-3/4" |
R-44 |
7-1/16" |
2,000 |
14" |
12 |
1" |
7-1/2" |
R-45 |
7-1/16" |
3,000 |
15" |
12 |
1-1/8" |
8-1/2" |
R-45 |
7-1/16" |
5,000 |
15-1/2" |
12 |
1-3/8" |
11-1/4" |
R-46 |
7-1/16" |
10,000 |
18-7/8" |
12 |
1-1/2" |
11-3/4" |
BX-156 |
7-1/16" |
15,000 |
19-7/8" |
16 |
1-1/2" |
13" |
BX-156 |
7-1/16" |
20,000 |
24-13/16" |
16 |
2" |
17-3/4" |
BX-156 |
9" |
2,000 |
16-1/2" |
12 |
1-1/8" |
8-1/2" |
R-49 |
9" |
3,000 |
18-1/2" |
12 |
1-3/8" |
9-1/2" |
R-49 |
9" |
5,000" |
19" |
12 |
1-5/8" |
12-1/2" |
R-50 |
9" |
10,000 |
21-3/4" |
16 |
1-1/2" |
13-1/4" |
BX-157 |
9" |
15,000 |
25-1/2" |
16 |
1-7/8" |
16" |
BX-157 |
11" |
2,000 |
20" |
16 |
1-1/4" |
9-1/4" |
R-53 |
11" |
3,000 |
21-1/2" |
16 |
1-3/8" |
10" |
R-53 |
11" |
5,000 |
23" |
12 |
1-7/8" |
14-1/4" |
R-54 |
11" |
10,000 |
25-3/4" |
16 |
1-3/4" |
15-3/8" |
BX-158 |
11" |
15,000 |
32" |
20 |
2" |
19-1/2" |
BX-158 |
13-5/8" |
2,000 |
22" |
20 |
1-1/4" |
9-1/2" |
R-57 |
13-5/8" |
3,000 |
24" |
20 |
1-3/8" |
10-3/4" |
R-57 |
13-5/8" |
5,000 |
26-1/2" |
16 |
1-5/8" |
12-3/4" |
BX-160 |
13-5/8" |
10,000 |
30-1/4" |
20 |
1-7/8" |
17-3/4" |
BX-159 |
13-5/8" |
15,000 |
34-7/8" |
20 |
2-1/4" |
21" |
BX-159 |
16-3/4" |
2,000 |
27" |
20 |
1-1/2" |
10-3/4" |
R-65 |
16-3/4" |
3,000 |
27-3/4" |
20 |
1-5/8" |
12-1/4" |
R-66 |
16-3/4" |
5,000 |
30-3/8" |
16 |
1-78" |
14-3/4" |
BX-162 |
16-3/4" |
10,000 |
34-5/16" |
24 |
1-7/8" |
17-3/4" |
BX-162 |
18-3/4" |
5,000 |
35-5/8" |
20 |
2" |
18" |
BX-163 |
16-3/4" |
10,000 |
40-15/16" |
24 |
2-1/4" |
23" |
BX-164 |
20-3/4" |
3,000 |
33-3/4" |
20 |
2" |
15-1/4" |
R-74 |
21-1/4" |
2,000 |
32" |
24 |
1-5/8" |
12-1/2" |
R-73 |
21-1/4" |
5,000 |
39" |
24 |
2" |
19" |
BX-165 |
21-1/4" |
10,000 |
45" |
24 |
2-1/2" |
24-3/4" |
BX-166 |
26-3/4" |
2,000 |
41" |
20 |
1-3/4" |
14-1/4" |
BX-167 |
21-1/4" |
3,000 |
43-3/8" |
24 |
2" |
17-1/2" |
BX-168 |
Description of API 6A Flange
API 6A flange have flange type including Welding neck Flanges, blind Flange.
- Type: Welding neck Flanges, Blind Flanges with Ring Joint Connetction
- Material: Carbon steel: A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22.8, Stainless Steel: F304 F304L F316 F316L 316Ti, Copper etc.
- Standard: API 6A
- Size: 1-13/16" to 21-1/4"
- Pressure: 2000psi, 3000psi, 5000psi, 10000psi, 15000psi, 20000psi
- Packing: No Fumigate or Fumigate Plywood/Wood Pallet or Case
- Surface Treatment: Anti-rust Oil, Transparent/Yellow/Black Anti-rust Paint,Zinc,Hot dipped Galvanized.
- E-catalogue: Available , please visit catalogue of flange
- Usage: Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects etc.
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