API 6A Weld Neck Flanges Dimensions, API 6A 6B Flange Standard, API 6A Flange Manufacturer In India.

  • API 6A Flange

API 6A Flange Sizes, API 6A Flange Weight, API 6A Flange Material, API 6A Flange Pressure Ratings, API VS ANSI Flanges.

Standard Specification For API 6A Flange

Size 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Pressure Rate 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Facing Types Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Large Tongue & Groove, Small Tongue, Groove
Value Added Services Antirust Paint, Oil Black Paint, Yellow Transparent, Zinc Forgedd, Cold and Hot Dip Galvanized
Dimensions ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Production Technique Forged, Heat Treated and Machined
Manufacturers of API 6A Flanges
  • Raccortubi S.P.A., Italy
  • Erne Fittings, Austria
  • Melesi, Italy
  • Mega, Italy
  • Ulma, Spain
  • TecnoForge, Italy
  • BENKAN Corporation, Japan
  • BKL- Thai Benkan, Thailand
  • Lame S.R.l., Italy
  • Metal Far, Italy
ANSI ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
BS BS4504 , BS4504, BS1560, BS10
JIS 5K, 10K, 16K 20K, 30K, 40K, 63K
Test Direct-reading Spectrograph,Hydrostatic testing machine,X-ray detector,UI trasonic flaw detector,Magnetic particle detector
Origin West Europe / Japan / Indian / USA / Korean
Equipments Press Machine, Bending Machine, Pushing Machine, Electric Bevelling Machine, Sand-Blasting Machine, etc.

API 6A Flange Material

Stainless Steel API 6A Flange : 
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel API 6A Flange : 
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Carbon Steel API 6A Flange : 
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706

Low Temperature Carbon Steel Slip on Flanges : ASTM A350, LF2, LF3

Alloy Steel API 6A Flange : 
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Copper Alloy Steel API 6A Flange : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel API 6A Flange : 
Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201)

Monel Alloy API 6A Flange : 
Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)

Special Alloy API 6A Flange : 
Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Hastelloy B2, Alloy 20 (UNS No. N08020)

API 6A Flange Dimensions

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


API 6A Type 6BX 15000PSI Blind / Welding Neck Flange

we are supplier of API 6A flanges like 15000PSI(103.5MPA) API 6A type 6BX blind/Welding Neck 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.

API Flanges Dimension

Dimension of 15000PSI(103.5MPA) type 6BX blind/Welding Neck API 6A Flange

Size 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

1. RING NUMBER BX, 2. C should be the max value 3. Tolerance and Ring Gasket according to API 6A-20TH

API 6A Type 6B 2000PSI Blind / Welding Neck Flange

API Flanges Dimension

We are supplier of API 6A flanges like 2000PSI(13.8MPA) 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.

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

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
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

1. RING NUMBER R or RX, 2. C should be the max value 3. Tolerance and Ring Gasket according to API 6A-20TH

API 6A Type 6BX 2000PSI Blind Flange

API Flanges Dimension

We are supplier of API 6A flanges like 2000PSI(13.8MPA) API 6A type 6BX 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.

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

Size 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

1. RING NUMBER BX, 2. C should be the max value 3. Tolerance and Ring Gasket according to API 6A-20TH

API 6A Type 6B 3000PSI Blind / Welding Neck Flange
API Flanges Dimension

We are supplier of API 6A flanges like 3000PSI(20.7MPA) 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.

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

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 26 109.6 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

1. RING NUMBER R or RX, 2. C should be the max value 3. Tolerance and Ring Gasket according to API 6A-20TH

API 6A Type 6B 5000PSI Blind / Welding Neck Flange
API Flanges Dimension

We are 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.

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

1. RING NUMBER R or RX, 2. C should be the max value 3. Tolerance and Ring Gasket according to API 6A-20TH

API 6A Type 6BX 10000PSI Blind / Welding Neck Flange
API Flanges Dimension

We are supplier of API 6A flanges like 10000PSI(69.0MPA) API 6A type 6BX blind/Welding Neck 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.

Dimension of 10000PSI(69.0MPA) type 6BX blind/Welding Neck API 6A Flange
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

1. RING NUMBER BX, 2. C should be the max value 3. Tolerance and Ring Gasket according to API 6A-20TH

API 6A Flange Application Industries
  • Air Pollution Control- Scrubbers for Coal-Fired Power Plants
  • Seawater Cooling Devices
  • Architectural railings
  • Wiring In Electrostatic Precipitators
  • Oil Refinery
  • Gas Scrubbing Plants
  • Pulp and Paper Processing Industries
  • Acetic, Phosphoric and Sulphuric Acid Processing Plants
  • Oil and Gas Production - offshore process equipment Offshore, sea water technology, chemical industry, good stability against reducing acids of medium strength like sulphuric acid and phosphoric acid and various chloric media, refinery, paper industry, pulp industry
Properties of API 6A Flange
  • Excellent corrosion resistance in a wide range of atmospheric environments
  • Good oxidation resistance in intermittent service to 870°C and in continuous service to 925°C
  • Good resistance to carbide precipitation
  • Good machining properties
  • higher strength at elevated temperatures
  • Excellent weldability with and without filler metals
API 6A Flange Delivery Time
  • Malaysia = 15 to 18 Days
  • Indonesia = 20 to 25 Days
  • UK = 30 to 40 Days
  • Thailand = 15 to 20 Days
  • US = 40 to 60 Days
  • Germany = 30 to 40 Days
  • Philippines = 30 to 40 Days
  • For All Gulf Countries = 10 to 15 Days
  • For All European Countries = 30 to 40 Days
Our Global Market