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API 6A Flange Dimensions

15000PSI(103.5MPA) type 6BX Blind and API 6A Welding Neck Flange Dimension

Size B OD C E1 Q G K T J1 J2 J3 J4 R BC N
1 13/16″ 46.8 210 3 – 5.56 77.77 106 45.3 97.6 71.4 47.6 – 10 160.3 8
2 1/16″ 53.2 220 3 – 5.95 86.23 114 50.8 111.1 82.5 54 – 10 174.6 8
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
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
2 9/16″ 65.9 255 3 – 6.75 102.77 133 57.2 128.6 100 57.1 – 10 200 8
3 1/16″ 78.6 290 3 – 7.54 119 154 64.3 154 122.2 63.5 – 10 230.2 8
4 1/16″ 104 360 3 – 8.33 150.62 194 78.6 195.3 158.7 73 – 10 290.5 8
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
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
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
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

2000PSI (13.8MPA) type 6B Blind and Welding Neck API 6A Flange Dimension

Size 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
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
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
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

2000PSI (13.8MPA) type 6BX Blind API 6A Flange Dimension

Size OD C E1 G K T J1 J4 R BC N H BX
30″ 1120 6 23 862.3 908 134.2 931.9 17.5 16 1039.8 32 45 303
26 3/4″ 1040 6 21.4 768.33 805 126.3 835.8 9.7 16 952.5 20 48 167

3000PSI (20.7MPA) Type 6B Blind and API 6A Welding Neck Flange Dimension

Size B OD C K P E T Q X BC N H LN HL JL R/RX
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
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
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
16 3/4″ 426.2 705 6 524 469.9 11.2 100.1 88.9 508 616 20 45 – – – 66
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
20 3/4″ 527.8 855 6 648 584.2 12.7 120.7 108 622.3 749.3 20 54 – – – 74

5000PSI (34.5MPA) type 6B Blind and API 6A Welding Neck Flange Dimension

Size B OD C K P E T Q X BC N H LN HL JL R/RX
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
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
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

10000PSI(69.0MPA) type 6BX Blind and API 6A Welding Neck Flange Dimension

Size B OD C E1 Q G K T J1 J2 J3 J4 R BC N H BX
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
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
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
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
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
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
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