API 6A Flanges | Wellhead Flanges | 6B & 6BX
PM Industries manufactures, supplies, and stocks API 6A flanges for critical oil and gas service, the kind used in wellhead systems, Christmas trees, valves, and other upstream equipment where sealing and reliability cannot slip. The flanges are built to the American Petroleum Institute's API 6A requirements, so they hold up to high pressure, temperature swings, vibration, and corrosive field conditions. Pressure capability runs from 2000 psi up to 20000 psi, depending on the class and design.
Most API 6A flanges use ring-type joint (RTJ) sealing faces. Paired with the correct gasket and bolting, an RTJ face gives a strong metal-to-metal seal, which is what keeps leakage down and joint integrity steady over long service. The flanges come in welding neck, blind, and threaded types, so you can pick the connection that fits installation, isolation, testing, or an equipment tie-in. They are usually made from alloy steel or stainless steel to give the strength and corrosion resistance that harsh oilfield work demands.
Close dimensional control and strict testing keep API 6A flanges interchangeable and consistent across equipment from different makers, which matters for safety and for keeping a field running. Beyond wellheads and Christmas trees, they go into drilling systems, choke and kill lines, manifold piping, and other high-pressure flow-control equipment. The design favors dependable service, easy maintenance, and long life, which is why it became a standard in the petroleum industry.
API 6A flanges give a proven answer for high-pressure sealing where safety, strength, and resistance to hard field conditions all matter. As a manufacturer, supplier, and stockist, PM Industries ships standard and custom API 6A flanges against fast quotes.
Specification API 6A Flanges
| Standards | ANSI/ASME B16.5, B16.48, ANSI Flanges, GOST Flanges, DIN Flanges, EN-1092, B16.47 Series A & B, ASME Flanges, EN Flanges, AWWA Flanges, BS Flanges. |
| JIS Standard | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| DIN FLANGES | DIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566, 2641, 2637, 2655, 2634, 2636, 2632, 2633, 2638, 2642, 2573, 2635. |
| Pressure Rating | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Types | Threaded, Plate, Screwed, Forged. |
| Supporting material | Gasket, Ring Joint, Flange Bolts |
| Size range | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
| Production technique | Forged, machined and Heat treated |
| Available Flange Type | Weld Neck Flanges, RTJ Flanges, Slip On Flanges, Spectacle Blind Flanges, Flanges Gaskets, Square Flanges, Standard Insert Flanges, High Hub Blinds Flanges, Flat Flanges, forged flanges, Weldo / Nipo Flanges, Jacket Insert Flanges, Tongue groove Flanges, Blind Flanges, Socket Weld Flanges, Large diameter Flanges, Long Weld Neck Flanges, Spacer Blinds, SWRF Flanges, SORF Flanges, Angle Face Rings Flanges, Spades Ring Spacers Flanges, WNRF Flanges, Screwed Flanges, Insert Flanges, flanges bolts, cf flange, Lap Joint Flanges, ASME B16.36 Orifice Flanges, Plate Flange, Expander Flanges, Ring Type Joint Flanges, Loose Flanges, Reducing Flanges, puddle flange, Threaded Flanges, blank flange, vacuum flange. |
| Connect Type/ Flange Face Type | Ring Type Joint (RTJ), Flat Face (FF), Tongue & Groove, Small Male-Female (SMF), Lap-Joint Face (LJF), Raised Face (RF), Large Male-Female (LMF), Small Tongue. |
| Custom design | As per your drawing |
| Test | Direct-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine. |
| Origin | Indian / USA / Korean / West Europe / Japan |
| Pressure Class | PN 6 TO PN 100 |
| Thickness | Normal Pipe Size ≤ 18 |
| Bore Diameter | Normal Pipe ≤ 10 |
| High Temperature | Above 200°C (400°F) For Class 150 Or Above 400°C (750°F) |
| Low Temperature | Above -29 Degree C (−20°F) |
| Coating/Surface Treatment: | Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized. |
| European/African/Russian Standard Flanges | Available |
| Gaskets Types | Full Face, Metallic Ring, Flat Ring Gasket |
Marking Standard | Name of Manufacturer |
| Schedule | |
| Type of Flange Facing | |
| Pressure Class | |
| Nominal Pipe Size, etc | |
Test Certificates | EN 10204/3.1B, NACE MR0103, NACE MR0175 |
| Raw Materials Certificate | |
| 100% Radiography Test Report | |
| Third Party Inspection Report, etc |
Flange Type Available
Api Flanges Pressure Ratings
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 Dimension
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 |
Application
- Food & Beverage
- Paper Industry
- Pharmaceutical
- Hospital Equipment
- Textiles
- Dairy
- Aircraft
- Chemicals
- Others Parts in Machinery
Testing
- Hydrostatic Test
- Macro Test
- Ultra Sonic Test (UT)
- Micro Test
- Hardness Test
- Radiography Test
- Pitting Resistance Test
- PMI Testing
- Mechanical Testing
- X-ray detector
Packing
- Wooden Boxes
- Shrink-Wrappedt
- Carton Boxes
- Wooden Crates
- Wooden Pallets
