Industries such as the oil and gas & petrochemical sector use wellheads and Christmas trees for drilling and manufacture of the end product. And so, they require components that connect to piping systems, especially for processing. Flanges are used in piping systems to clean, inspect or they may be used as a device that aids in the maintenance of said systems. Api 6a Flanges Manufacturer In India uses this specification to not only create standardized flanges but also use it as a reference to keep following the requirements of the application.
Like most standards, this specification also has some parameters that need to be followed including - material used, test methods, design, inspection, welding, dimensions, storing, shipment, marking, handling, purchasing, repair and remanufacture. Manufacturers who use this specification to produce Api 6a Rtj Flange, use alloy steel as the material. The main benefit of using alloy steel with modern production techniques is that the flange gets better characteristics, and the dimensions are more precise. Though the cost of the alloy steel Api 6a Compact Flange is higher, its robust performance and longevity in corrosive environments make up for its high cost. Produced with a raised faced design, the ring joint type Api 6bx Flange. Once the gasket has been seated properly in the assembly, the behavior of the connecting make-up bolting force in tandem with the tolerances to the raised face of the flange. As a result of this, the flange or gasket is protected from damage due to excessive bolt torque. This specification has 2 product requirements - PR 1 and PR2. The product requirement for the first level is basic testing and designing of the Api 5000 Instrument Flange, which is practiced keeping in mind parameters such as material, temperature, and pressure. The second product requirement level is much more detailed, where the buyers request a validation of the design procedure for the Api 6a Threaded Flange.
Api 6a Flange Specification
| Porduct Name | Api 6a Flanges |
| OD | 15mm To 6000mm |
| Pressure | 150#-2500#, PN0.6-PN400, 5K-40K,API 2000-15000 |
| Standard | ANSI B16.5,EN1092-1, SABA1123, DIN, JIS B2220, GOST,UNI,AS2129, API 6A |
| Wall thickness | SCH5S, SCH10S, SCH10, SCH40S,STD, XS, XXS, SCH20,SCH30,SCH40, SCH60, SCH80, SCH160, XXS and etc. |
| Application | Petrochemical industy; avation and aerospace industry; pharmaceutical industry; gas exhaust;power plant; ship buliding; water treament,etc. |
| Advantages | ready stock, faster delivery time; available in all sizes, customized; high quality |
| Flange Face Type | Raised Face, Lap-Joint Face, Small Male-Female, Ring Type Joint, Flat Face, Small Tongue, Large Male-Female, Large Tongue & Groove Flanges manufacturer and Supplier |
|---|---|
| Flanges Marking | All Flanges are marked as follows: Supplier or Manufacturer’s Name, Size, Class, Bore, Dimension, Material, Heat No. Or according to the customer’s request. |
6bx Flange
Api 6b Flanges
Api 6bx Flange
Api 10k Flange
Api 6a Adapter Flange
Api 6a Flange
Api 6a Blind Flanges
Api 6a Bx Flange
Api 6a 6bx Blind Flange
Api 6a Compact Flange
Api 6a Instrument Flange
Api 6a Test Flanges
Api 6a Threaded Flange
Api 6a Wn Flanges
Api 6a 10k Flange
Api 6a Flanges
Api Flange
Api 5000 Flange
Api 10000 Flange
Api 6a Carbon Steel Forged Blind Flange
API 6A forged Flange
| Size in Inches | B | OD | C | E1 | Q | G | K | T | J1 | J2 | J3 | J4 | R | BC | N | H | Ring Number |
| 1 13/16" | 46.8 | 210 | 3 | - | 5.56 | 77.77 | 106 | 45.3 | 97.6 | 71.4 | 47.6 | - | 10 | 160.3 | 8 | 26 | 151 |
| 2 1/16" | 53.2 | 220 | 3 | - | 5.95 | 86.23 | 114 | 50.8 | 111.1 | 82.5 | 54 | - | 10 | 174.6 | 8 | 26 | 152 |
| 2 9/16" | 65.9 | 255 | 3 | - | 6.75 | 102.77 | 133 | 57.2 | 128.6 | 100 | 57.1 | - | 10 | 200 | 8 | 29 | 153 |
| 3 1/16" | 78.6 | 290 | 3 | - | 7.54 | 119 | 154 | 64.3 | 154 | 122.2 | 63.5 | - | 10 | 230.2 | 8 | 32 | 154 |
| 4 1/16" | 104 | 360 | 3 | - | 8.33 | 150.62 | 194 | 78.6 | 195.3 | 158.7 | 73 | - | 10 | 290.5 | 8 | 39 | 155 |
| 5 1/8" | 131 | 420 | 3 | 9.5 | 9.53 | 176.66 | 225 | 98.5 | 244.5 | 200 | 81.8 | 6.4 | 16 | 342.9 | 12 | 42 | 169 |
| 7 1/16" | 180.2 | 505 | 6 | 11.1 | 11.11 | 241.83 | 305 | 119.1 | 325.4 | 276.2 | 92.1 | 7.9 | 16 | 428.6 | 16 | 42 | 156 |
| 9 " | 229.4 | 650 | 6 | 12.7 | 12.7 | 299.06 | 381 | 146.1 | 431.8 | 349.2 | 123.8 | 14.2 | 16 | 552.4 | 16 | 51 | 157 |
| 11" | 280.2 | 815 | 6 | 14.3 | 14.29 | 357.23 | 454 | 187.4 | 584.2 | 427 | 235.7 | 12.7 | 16 | 711.2 | 20 | 54 | 158 |
| 13 5/8" | 346.9 | 885 | 6 | 15.9 | 15.88 | 432.64 | 541 | 204.8 | 595.3 | 528.6 | 114.3 | 17.5 | 25 | 771.5 | 20 | 61 | 159 |
| 18 3/4" | 477 | 1160 | 6 | 18.3 | 18.26 | 577.9 | 722 | 255.6 | 812.8 | 730.2 | 155.6 | 35.1 | 25 | 1016 | 20 | 80 | 164 |
| Size in Inch | B | OD | C | K | P | E | T | Q | X | BC | N | H | LN | HL | JL | R/RX |
| 2 1/16" | 53.2 | 165 | 3 | 108 | 82.55 | 7.9 | 33.4 | 25.4 | 84 | 127 | 8 | 20 | 81 | 60.3 | 53.3 | 23 |
| 2 9/16" | 65.9 | 190 | 3 | 127 | 101.6 | 7.9 | 36.6 | 28.6 | 100 | 149.2 | 8 | 23 | 88 | 73 | 63.5 | 26 |
| 3 1/8" | 81.8 | 210 | 3 | 146 | 123.83 | 7.9 | 39.7 | 31.8 | 117 | 168.3 | 8 | 23 | 91 | 88.9 | 78.7 | 31 |
| 4 1/16" | 108.7 | 275 | 3 | 175 | 149.23 | 7.9 | 46.1 | 38.1 | 152 | 215.9 | 8 | 26 | 110 | 114.3 | 103.1 | 37 |
| 5 1/8" | 131 | 330 | 3 | 210 | 180.98 | 7.9 | 52.4 | 44.5 | 189 | 266.7 | 8 | 29 | 122 | 141.3 | 122.9 | 41 |
| 7 1/16" | 181.8 | 355 | 6 | 241 | 211.15 | 7.9 | 55.6 | 47.6 | 222 | 292.1 | 12 | 29 | 126 | 168.3 | 147.1 | 45 |
| 9" | 229.4 | 420 | 6 | 302 | 269.88 | 7.9 | 63.5 | 55.6 | 273 | 349.3 | 12 | 32 | 141 | 219.1 | 199.1 | 49 |
| 11" | 280.2 | 510 | 6 | 356 | 323.85 | 7.9 | 71.5 | 63.5 | 343 | 431.8 | 16 | 35 | 160 | 273 | 248.4 | 53 |
| 13 5/8" | 346.9 | 560 | 6 | 413 | 381 | 7.9 | 74.7 | 66.7 | 400 | 489 | 20 | 35 | - | - | - | 57 |
| 16 3/4" | 426.2 | 685 | 6 | 508 | 469.9 | 7.9 | 84.2 | 76.2 | 495 | 603.2 | 20 | 42 | - | - | - | 65 |
| 21 1/4" | 540.5 | 815 | 6 | 635 | 584.2 | 9.7 | 98.5 | 88.9 | 610 | 723.9 | 24 | 45 | - | - | - | 73 |
| Size in inches | OD | C | E1 | G | K | T | J1 | J4 | R | BC | N | H | BX |
| 26 3/4" | 1040 | 6 | 21.4 | 768.33 | 805 | 126.3 | 835.8 | 9.7 | 16 | 952.5 | 20 | 48 | 167 |
| 30" | 1120 | 6 | 23 | 862.3 | 908 | 134.2 | 931.9 | 17.5 | 16 | 1039.8 | 32 | 45 | 303 |
| Size in Inches | 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 | 109.6 | 60.3 | 50 | 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 | 59.7 | 27 |
| 3 1/8" | 81.8 | 240 | 3 | 156 | 123.83 | 7.9 | 46.1 | 38.1 | 127 | 190.5 | 8 | 26 | 109.5 | 88.9 | 74.4 | 31 |
| 4 1/16" | 108.7 | 290 | 3 | 181 | 149.23 | 7.9 | 52.4 | 44.4 | 158.8 | 235 | 8 | 32 | 122.2 | 114.3 | 98 | 37 |
| 5 1/8" | 131 | 350 | 3 | 216 | 180.98 | 7.9 | 58.8 | 50.8 | 190.5 | 279.4 | 8 | 35 | 134.9 | 141.3 | 122.9 | 41 |
| 7 1/16" | 181.8 | 380 | 6 | 241 | 211.15 | 7.9 | 63.5 | 55.6 | 235 | 317.5 | 12 | 32 | 147.6 | 168.3 | 147.1 | 45 |
| 9" | 229.4 | 470 | 6 | 308 | 269.88 | 7.9 | 71.5 | 63.5 | 298.5 | 393.7 | 12 | 39 | 169.9 | 219.1 | 189.7 | 49 |
| 11" | 280.2 | 545 | 6 | 362 | 323.85 | 7.9 | 77.8 | 69.9 | 368.3 | 469.9 | 16 | 39 | 192.1 | 273 | 237.2 | 53 |
| 13 5/8" | 346.9 | 610 | 6 | 419 | 381 | 7.9 | 87.4 | 79.4 | 419.1 | 533.4 | 20 | 39 | - | - | - | 57 |
| 16 3/4" | 426.2 | 705 | 6 | 524 | 469.9 | 11.2 | 100.1 | 88.9 | 508 | 616 | 20 | 45 | - | - | - | 66 |
| 20 3/4" | 527.8 | 855 | 6 | 648 | 584.2 | 12.7 | 120.7 | 108 | 622.3 | 749.3 | 20 | 54 | - | - | - | 74 |
| 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 |
| NPS in Inches | DN in MM | FLANGE ODA MM | FLANGE THICKNESS in MM | SLIP ON FLANGE WEIGHT in KGS | WELD NECK FLANGE WEIGHT in KGS | BLIND FLANGE WEIGHT in KGS |
| 1/ 2 | 15 | 88.9 | 11.2 | 0.4 | 0.5 | 0.4 |
| 3/ 4 | 20 | 98.6 | 12.7 | 0.6 | 0.7 | 0.6 |
| 1 | 25 | 108 | 14.2 | 0.8 | 1 | 0.9 |
| 1 1/ 4 | 32 | 117.3 | 15.7 | 1 | 1.3 | 1.2 |
| 1 1/ 2 | 40 | 127 | 17.5 | 1.3 | 1.7 | 1.5 |
| 2 | 50 | 152.4 | 19.1 | 2.1 | 2.6 | 2.4 |
| 2 1/ 2 | 65 | 177.8 | 22.4 | 3.3 | 4.1 | 3.9 |
| 3 | 80 | 190.5 | 23.9 | 3.9 | 4.9 | 4.9 |
| 3 1/ 2 | 90 | 215.9 | 23.9 | 4.8 | 6.1 | 6.2 |
| 4 | 100 | 228.6 | 23.9 | 5.3 | 6.8 | 7.0 |
| 5 | 125 | 254 | 23.9 | 6.1 | 8.6 | 8.6 |
| 6 | 150 | 279.4 | 25.4 | 7.5 | 10.6 | 11.3 |
| 8 | 200 | 342.9 | 28.4 | 12.1 | 17.6 | 19.6 |
| 10 | 250 | 406.4 | 30.2 | 16.5 | 24 | 28.6 |
| 12 | 300 | 482.6 | 31.8 | 26.2 | 36.5 | 43.2 |
| 14 | 350 | 533.4 | 35.1 | 34.6 | 48.4 | 58.1 |
| 16 | 400 | 596.9 | 36.6 | 44.8 | 60.6 | 76.1 |
| 18 | 450 | 635 | 39.6 | 48.9 | 68.3 | 93.7 |
| 20 | 500 | 698.5 | 42.9 | 61.9 | 84.5 | 122.0 |
| 24 | 600 | 812.8 | 47.8 | 86.9 | 115 | 185.0 |
| OUTSIDE DIAMETER | When O.D. is 24" or less | +1/8", -1/16" |
| OUTSIDE DIAMETER | When O.D. is over 24" | +1/8", -1/8" |
| INSIDE DIAMETER | When I.D. is 10" and Smaller | +1/32",- 0" |
| INSIDE DIAMETER | When I.D. is over 10” | +1/16",- 0" |
| CONTACT FACE DIAMETER | 1/16" Raised Face And 1/4" Raised Face | +1/64",- 1/64" |
| DRILLING | Bolt Hole Diameter | +1/32”, -1/32” |
| DRILLING | Bolt Circle Diameter | + 1/16”, - 1/16" |
| DRILLING | Bolt Hole Spacing | + 1/32”, - 1/32" |
| THICKNESS | When nominal size is 18" and smaller | +1/8", -0" |
| THICKNESS | When nominal size is 20" and larger | +3/16",- 0" |
API 6b Flange has a minimum wall thickness of 200 inches