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C&N is supplier of API 6A flanges like 5000PSI(34.5MPA) API 6A type 6B Welding Neck Flange Blind Flange, include type 6B, 6BX with RTJ connection pressure rating from 2000PSI(13.8MPA), 3000PSI(20.7MPA), 5000PSI(34.5MPA), 10000PSI(69.0MPA), 15000PSI(103.5MPA), to 20000PSI(138.0MPA), which is precisely engineered in accordance with international quality standards totally.We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.


Dimensions of Type 6BX flanges for 5000 psi (34.5 MPa) rated working pressure. 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 prevents damage to the flange or gasket from excessive bolt torque.

| SIZE | FLANGE DIAM. | RTJ DIM. | FLANGE HEIGHT | BOLTING | FLANGE HUB | RING | ||||||||
| NPS | OD | C | K | P | T | Q | LN | BC | N | H | X | HL | JL | R / RX |
| 2-1/16″ | 215 | 3 | 124 | 95.25 | 46.1 | 38.1 | 109.5 | 165.10 | 8 | 26 | 104.8 | 60.3 | 43.7 | 24 |
| 2-9/16″ | 245 | 3 | 137 | 107.95 | 49.3 | 41.3 | 112.7 | 190.50 | 8 | 29 | 123.8 | 73.0 | 54.9 | 27 |
| 3-1/8″ | 265 | 3 | 168 | 136.53 | 55.6 | 47.7 | 125.4 | 203.20 | 8 | 32 | 133.3 | 88.9 | 67.5 | 35 |
| 4-1/16″ | 310 | 3 | 194 | 161.93 | 62.0 | 54.0 | 131.8 | 241.30 | 8 | 35 | 161.9 | 114.3 | 88.1 | 39 |
| 5-1/8″ | 375 | 3 | 229 | 193.68 | 81.0 | 73.1 | 163.5 | 292.10 | 8 | 42 | 196.8 | 141.3 | 110.3 | 44 |
| 7-1/16″ | 395 | 6 | 248 | 211.15 | 92.1 | 82.6 | 181.0 | 317.50 | 12 | 39 | 228.6 | 168.3 | 132.6 | 46 |
| 9″ | 485 | 6 | 318 | 269.88 | 103.2 | 92.1 | 223.8 | 393.70 | 12 | 45 | 292.1 | 219.1 | 173.8 | 50 |
| 11″ | 585 | 6 | 371 | 323.85 | 119.1 | 108.0 | 265.1 | 482.60 | 12 | 51 | 368.3 | 273.1 | 216.7 | 54 |
Materials for API 6A Type 6B 5000 psi(34.5 MPa) Weld Neck RTJ Flange
1) Alloy Steel: ASTM A182 Grade F1 / F5 / F9 / F11 / F22 / F91
2) Carbon Steel: ASTM A105 / A105N, ASTM A694 Grade F42 / F46 / F52 / F56 / F60 / F65 / F70
ASTM A350 Grade. LF2
3) Stainless Steel: ASTM A182 Grade F304 / F304L, F316/ F316L, F310, F309, F317L, F321, F904L, F347
4) Duplex Stainless Steel: ASTM A182 Grade F44 / F45 / F51 / F53 / F55 / F61 / F60
5) Nickel Alloys: ASTM B472, ASTM B564, ASTM B160
Monel 400, Nickel 200, Inconel 825, Inconel 601, Hastelloy C276, Alloy 31,
Alloy 20, Inconel 625, Inconel 600
6)Copper Alloys: ASTM B61 / B152 / B151 / B62
C&N Industiral,huitong limtied is professional pipe,flange and fitting manufacturer,our products approved by PDO, SADARA, SWCC,PDO etc.













