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These aspects often include its performance, design, materials, testing, inspection, along with its API 10000 Flange Dimensions and functional interchangeability, welding, marking, purchasing, handling, storing, shipment, repair and remanufacture. API 6A Flanges are typically a part of applications in the petroleum and natural gas industries. These flanges are designed and manufactured to be durable, especially when the Api 6a 6b And 6bx Flanges are a part of high pressure environments or various working conditions. Manufactured from alloy steel or carbon steel grades, the main functions of the API 6a Blind Flanges is to join pipes together while increasing the support strength, or they could also be used to block off a section of a pipe, valve or equipment in a pipeline.
API 6A is an International Standard that specifies requirements and provides recommendations for several aspects of flanges.
Since toughness and hardness are the main characteristics of a Carbon Steel API 6A Flanges, in many instances they are surface treated with different coating materials to improve their life span, as well as their corrosion resistance properties. Although the Stainless Steel API 6a WN Flanges tend to have much better corrosion resistance properties, the class of stainless steel utilized will be dependent on its application.
| Specification : | API 6A Flanges |
| Coating Flange Faces : | Oil Black Paint, Yellow Transparent, Anti-rust Paint, Zinc Plated, Cold and Hot Dip Galvanized |
| Size Chart : | 1/2″ (15 NB) To 48″ (1200NB) |
| Supporting Flange Material: | Gasket, Ring Joint, Flange Bolts |
| Machining Equipment: | Electric bevelling machine, Bending machine, Press machine, Pushing Machine, Sand-blasting machine etc |
| Standards : | MSS SP44 Flange, EN-1092 Flange, BS10 Flange, ASME B16.38 Flange, UNI Flange, PN Flange, ISO Flange, JIS Flange, ASME B16.47 (Series A, Series B) Flange, ASME B16.5 Flange, AWWA Flange, DIN Flange, GOST Flange |
| Pressure Rating Table: | Class 150 LBS, Class 300 LBS, Class 600 LBS, Class 900 LBS, Class 1500 LBS, Class 2500 LBS |
| Production Process: | Forged, Heat Treated and Machined |
| Application: | Fabrication Industry Natural Gas Industry Water Pipeline Industry Oil And Gas Industry Chemical Industry Nuclear Power Plant |
| Common Types of Flanges Dimensions: | Class 150 RTJ Flanges 300 LB WNRF Class 900 SORF 1500# BLRF Class 2500 BLRF |
| Connect Type Type: | RTJ, SMF, LJF, LMF, RF, FF |
| Design For Size: | ANSI, ASME, EN, ASA, PN, JIS, DIN, BS |
| Size | B | OD | C | E1 | Q | G | K | T | J1 | J2 | J3 | J4 | R | BC | N | H | BX |
| 1 13/16" | 46.8 | 185 | 3 | - | 5.56 | 77.77 | 105 | 42.1 | 88.9 | 65.1 | 48.5 | - | 10 | 146.1 | 8 | 23 | 151 |
| 2 1/16" | 53.2 | 200 | 3 | - | 5.95 | 86.23 | 111 | 44.1 | 100 | 74.7 | 51.6 | - | 10 | 158.8 | 8 | 23 | 152 |
| 2 9/16" | 65.9 | 230 | 3 | - | 6.75 | 102.77 | 132 | 51.2 | 120.7 | 92.1 | 57.2 | - | 10 | 184.2 | 8 | 26 | 153 |
| 3 1/16" | 78.6 | 270 | 3 | - | 7.54 | 119 | 152 | 58.4 | 142.1 | 110.2 | 63.5 | - | 10 | 215.9 | 8 | 29 | 154 |
| 4 1/16" | 104 | 315 | 3 | - | 8.33 | 150.62 | 185 | 70.3 | 182.6 | 146.1 | 73.1 | - | 10 | 258.8 | 8 | 32 | 155 |
| 5 1/8" | 131 | 360 | 3 | 9.5 | 9.53 | 176.66 | 221 | 79.4 | 223.8 | 182.6 | 81 | 6.4 | 10 | 300 | 12 | 32 | 169 |
| 7 1/16" | 180.2 | 480 | 6 | 11.1 | 11.11 | 241.83 | 302 | 103.2 | 301.6 | 254 | 95.3 | 9.7 | 16 | 403.2 | 12 | 42 | 156 |
| 9 " | 229.4 | 550 | 6 | 12.7 | 12.7 | 299.06 | 359 | 123.9 | 374.7 | 327.1 | 93.7 | 9.7 | 16 | 476.3 | 16 | 42 | 157 |
| 11" | 280.2 | 655 | 6 | 14.3 | 14.29 | 357.23 | 429 | 141.3 | 450.9 | 400.1 | 103.2 | 14.2 | 16 | 565.2 | 16 | 48 | 158 |
| 13 5/8" | 346.9 | 770 | 6 | 15.9 | 15.88 | 432.64 | 518 | 168.3 | 552.5 | 495.3 | 114.3 | 17.5 | 16 | 673.1 | 20 | 51 | 159 |
| 16 3/4" | 426.2 | 870 | 6 | 8.3 | 8.33 | 478.33 | 576 | 168.3 | 655.6 | 601.7 | 76.2 | 30.2 | 19 | 776.3 | 24 | 51 | 162 |
| 18 3/4" | 477 | 1040 | 6 | 18.3 | 18.26 | 577.9 | 697 | 223.1 | 752.5 | 674.7 | 155.6 | 25.4 | 16 | 925.5 | 24 | 61 | 164 |
| 21 1/4" | 540.5 | 1145 | 6 | 19.1 | 19.05 | 647.88 | 781 | 241.3 | 847.7 | 762 | 165.1 | 31.8 | 21 | 1022.4 | 24 | 67 | 166 |
API 6a Blind Flange
Stainless Steel API 6a WN Flanges Material
Api 6a 6b And 6bx Flanges
API 6a 5000 Flange
Carbon Steel Api 6a Type 6bx Flange
API Specification 6A ISO 10423
API 6A Slip On Flange
Carbon Steel API 6A Flange
Carbon Steel API 6A 6BX Flange
Api 6a Type 6bx Flange
Api 6a Weld Neck Flange
Carbon Steel API 6A Threaded Flange
| Flange Size | Working Pressure (PSI) | OD | No. of Bolt Holes | Diam. of Bolt Holes | Length of Bolts | API Ring Gasket |
|---|---|---|---|---|---|---|
| 1-13/16" | 10,000 | 7-3/8" | 8 | 3/4" | 5-1/4" | BXS-151 |
| 1-13/16" | 15,000 | 8-3/16" | 8 | 7/8" | 6" | BXS-151 |
| 1-13/16" | 20,000 | 10-1/8" | 8 | 1" | 7-3/4" | BXS-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" | BXS-152 |
| 2-1/16" | 15,000 | 8-3/4" | 8 | 7/8" | 7/8" | BXS-152 |
| 2-1/16" | 20,000 | 11-5/16" | 8 | 1-1/8" | 1-1/8" | BXS-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" | BXS-153 |
| 2-9/16" | 15,000 | 10" | 8 | 1" | 7" | BXS-153 |
| 2-9/16" | 20,000 | 12-13/16" | 8 | 1-1/4" | 9-1/2" | BXS-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" | BXS-154 |
| 3-1/16" | 15,000 | 11-5/16" | 8 | 1-1/8" | 8" | BXS-154 |
| 3-1/16" | 20,000 | 14-1/16" | 8 | 1-3/8" | 10-3/4" | BXS-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" | BXS-155 |
| 4-1/16" | 20,000 | 17-9/16" | 8 | 1-3/4" | 12-3/4" | BXS-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" | BXS-156 |
| 7-1/16" | 15,000 | 19-7/8" | 16 | 1-1/2" | 13" | BXS-156 |
| 7-1/16" | 20,000 | 24-13/16" | 16 | 2" | 17-3/4" | BXS-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" | BXS-157 |
| 9" | 15,000 | 25-1/2" | 16 | 1-7/8" | 16" | BXS-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" | BXS-158 |
| 11" | 15,000 | 32" | 20 | 2" | 19-1/2" | BXS-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" | BXS-160 |
| 13-5/8" | 10,000 | 30-1/4" | 20 | 1-7/8" | 17-3/4" | BXS-159 |
| 13-5/8" | 15,000 | 34-7/8" | 20 | 2-1/4" | 21" | BXS-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" | BXS-162 |
| 16-3/4" | 10,000 | 34-5/16" | 24 | 1-7/8" | 17-3/4" | BXS-162 |
| 18-3/4" | 5,000 | 35-5/8" | 20 | 2" | 18" | BXS-163 |
| 16-3/4" | 10,000 | 40-15/16" | 24 | 2-1/4" | 23" | BXS-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" | BXS-165 |
| 21-1/4" | 10,000 | 45" | 24 | 2-1/2" | 24-3/4" | BXS-166 |
| 26-3/4" | 2,000 | 41" | 20 | 1-3/4" | 14-1/4" | BXS-167 |
| 21-1/4" | 3,000 | 43-3/8" | 24 | 2" | 17-1/2" | BXS-168 |
| Size | B | OD | C | K | P | E | T | Q | X | BC | N | H | LN | HL | JL | R/RX |
| 2 1/16" | 53.2 | 215 | 3 | 124 | 95.25 | 7.9 | 46.1 | 38.1 | 104.8 | 165.1 | 8 | 26 | 109.5 | 60.3 | 43.7 | 24 |
| 2 9/16" | 65.9 | 245 | 3 | 137 | 107.95 | 7.9 | 49.3 | 41.3 | 123.8 | 190.5 | 8 | 29 | 112.7 | 73 | 54.9 | 27 |
| 3 1/8" | 81.8 | 265 | 3 | 168 | 136.53 | 7.9 | 55.6 | 47.7 | 133.3 | 203.2 | 8 | 32 | 125.4 | 88.9 | 67.5 | 35 |
| 4 1/16" | 108.7 | 310 | 3 | 194 | 161.93 | 7.9 | 62 | 54 | 161.9 | 241.3 | 8 | 35 | 131.8 | 114.3 | 88.1 | 39 |
| 5 1/8" | 131 | 375 | 3 | 229 | 193.68 | 7.9 | 81 | 73.1 | 196.8 | 292.1 | 8 | 42 | 163.5 | 141.3 | 110.3 | 44 |
| 7 1/16" | 181.8 | 395 | 6 | 248 | 211.15 | 9.7 | 92.1 | 82.6 | 228.6 | 317.5 | 12 | 39 | 181 | 168.3 | 132.6 | 46 |
| 9" | 229.4 | 485 | 6 | 318 | 269.88 | 11.2 | 103.2 | 92.1 | 292.1 | 393.7 | 12 | 45 | 223.8 | 219.1 | 173.8 | 50 |
| 11" | 280.2 | 585 | 6 | 371 | 323.85 | 11.2 | 119.1 | 108 | 368.3 | 482.6 | 12 | 51 | 265.1 | 273.1 | 216.7 | 54 |
| Flange Size | Working Pressure (PSI) | Outside Diameter | No. of Bolt Holes | Diam. of Bolt Holes | Length of Bolts | APIS 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 |