API Flanges
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›Technical Data
API 6A Flanges Standard Specifiction
| Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| Test Certificates | EN 10204/3.1B / Raw Materials Certificate / 100% Radiography Test Report / Third Party Inspection Report, etc |
| Coating | Zinc Plated, Yellow Transparent, Oil Black Paint, Anti-rust Paint, Cold and Hot Dip Galvanized |
| Most common types | forged / Threaded / Screwed / Plate |
| Production technique | forged, Heat treated and machined |
| Connect Type/ Flange Face Type | Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Raised Face (RF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, , Groove |
| Special design | As per your drawing 15 NB (1/2″) to 200 NB (8″) / AS, ANSI, BS, DIN and JIS / Equal and Reducing Configurations |
| Export to | Egypt, Ireland, Brazil, Iran, Spain, Canada, Korea, India, Saudi Arabia, Thailand, Singapore, Indonesia, Oman, Dubai, Ukraine, USA, Peru, etc |
| Origin | West Europe / Japan / Indian / USA / Korean |
| Test | Hydrostatic testing machine, X-ray detector, Direct-reading Spectrograph, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | bevelling machine, Bending machine, Pushing Machine, Press machine, electric Sand-blasting machine etc |
Api 6a Flange Pressure Temperature Rating
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| 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 6B 2000PSI Blind / Welding Neck Flange
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| 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 |
API 6A Type 6BX 2000PSI Blind Flange
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| 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 |
API 6A Type 6B 3000PSI Blind / Welding Neck Flange
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| 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 |
API 6A Type 6BX 10000PSI Blind / Welding Neck Flange
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| 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 |
See Who buy from Ashtapad Overseas and What exactly?
| col_1 | col_2 |
|---|---|
| api flange blind dn50 | Germany, Czechia, Thailand, Malaysia |
| Tank Truck API Valve flange | Italy, Chile, Iran, Singapore |
| API 6A Pressure PN6 Weld neck Flange | Indonesia, Dammam -KSA, Philippines, Belgium |
| API Flange Class150 6 Inch | Malaysia, Philippines, Canada, Singapore |
| API 6A TYPE 6B WELDING NECK FLANGE RTJ 2-1/16" X 5000 PSI | South Africa, Bahrain, Singapore, Singapore |
| API Spec 6A Double Studded Adapter Flange | South Korea, Singapore, NY 12203 (USA), Malaysia |
| api 6a wn rtj flange flange | USA, Malaysia, Bangladesh, Finland |
| Ring Gaskets For Api 6a Flanges | Japan, Europe, Romania, Malaysia |
| api 6a b16.5 class 2500 blind flange 20 rf | Canada, UK, Poland, Ellington -United States |
| WN Flange ASNI B16.5 RF with Finishing API 6A/MSS SP-6 | Spain, Egypt, Mexico, UK |
| API 6A Type 6B/6BX Flange | Colombia, Sweden, Malaysia, China |
| API 6A Type 6B 5000PSI WNRF Neck Flange | Taiwan, Malaysia, Los Alamos -Mexico, Philippines |
| Api 6a Type 6bx 10000 Psi | Malaysia, Netherlands, Russia, Dubai |
| API 6A Type 6BX 15000PSI Blind Flange | France, Qatar, Europe, Thailand |
| PN10 API Class 300 LB flange 4 inch | Australia, Philippines, UK, Nigeria |
| ANSI API 125 flanges | Malaysia, Oman, Hong Kong, UAE |
| api 6a standard lap joint flange | Saudi Arabia (KSA), South Africa, Kuwait, Brazil |
| API 6 inch stainless steel flange | Europe, United Kingdom -UK, Malaysia, UAE |
| API 6a Welding Neck Flange 26"-60" Class 75lbs - 900lbs | Turkey, United Arab Emirates (UAE), Norway, Malaysia |
›Dimensions & Weight
Dimensions of API Weld Neck Flange
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| 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 |
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