Type 05 Blank (Blind) Flange
Solid forged disc without a central bore, engineered to safely isolate piping lines, pressure vessel nozzles, and inspectable headers.
European Standard Engineering
Manufacturing Standard & Scope of EN 1092-1 Flanges
EN 1092-1 is the harmonized European standard for circular steel flanges, superseding legacy national DIN standards (including DIN 2501, 2632, and 2633). As an ISO 9001, EIL, and IBR approved manufacturer based in Mumbai, India, Rajtilak Metal produces fully certified European standard flanges engineered for oil & gas, chemical processing, maritime pipelines, and high-pressure steam utility circuits.
The standard establishes pressure-temperature ratings, dimensions, dimensional tolerances, threading configurations, bolt patterns, and strict material verification under EN 10204 3.1 certification. Flanges are manufactured using controlled hot forging, solution annealing, and CNC machining processes.
ISO 9001:2015 EIL Approved IBR Certified EN 10204 3.1 Traceable
- Full nominal size range from DN 10 to DN 4000
- Pressure classes from PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63 up to PN 400
- Standard facing styles: Type A (Flat Face), Type B (Raised Face B1/B2), Type C/D (Tongue/Groove)
- 100% Raw material traceability with individual heat-number die stamping
Design Configurations
Common EN 1092-1 Flange Types & Classifications
Standardized mechanical designs adapted for specific structural rigidity, pressure holding capability, and fabrication methods across industrial piping circuits.
Type 11 Weld Neck Flange
Engineered with a tapered hub transition to reduce stress concentration, ideal for cyclic fatigue, severe thermal loads, and extreme pressures.
Type 01 Plate Flange
Flat circular plate flange slip-fitted over pipe outer diameters and secured with fillet welds for low to medium pressure utility services.
Type 12 / 13 Hubbed & Threaded
Type 12 hubbed slip-on and Type 13 hubbed threaded flanges for reliable mechanical joints without on-site welding constraints.
Engineering Datasheet
Technical Standard Specification Reference
Comprehensive standard overview covering manufacturing limits, material grades, testing protocols, and certified testing options.
| Parameter | Standard Engineering Scope |
|---|---|
| Governing Standards | EN 1092-1 (Steel Flanges), EN 1092-2 (Cast Iron Flanges), DIN EN 1092-1, ISO 7005-1 |
| Nominal Diameters | DN 10 to DN 4000 (Metric European nominal bore sizing) |
| Nominal Pressure (PN) | PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400 |
| Flange Facing Options | Type A (Flat Face), Type B (Raised Face B1/B2), Type C (Tongue), Type D (Groove), Type E (Spigot), Type F (Recess), Type G/H (O-Ring) |
| Carbon Steel Grades | P235GH, P245GH, P250GH, P265GH, P280GH, S235JR, ASTM A105, C22.8 |
| Stainless Steel Grades | 1.4301 (304), 1.4307 (304L), 1.4401 (316), 1.4404 (316L), 1.4541 (321), 1.4571 (316Ti), 1.4539 (904L) |
| Alloy & Duplex Grades | 1.4462 (Duplex 2205), 1.4410 (Super Duplex 2507), 16Mo3, 13CrMo4-5, 10CrMo9-10, Inconel, Hastelloy, Monel |
| Testing & Inspection | Hydrostatic pressure test, Ultrasonic (UT), Magnetic Particle (MPI), Dye Penetrant (DPI), PMI chemical verification |
| Quality Certification | EN 10204 Type 3.1 MTC with full heat traceability, third-party inspection (TUV, DNV, BV, Lloyds, SGS) |
Dimensional Data
EN 1092-1 Type 11 (Weld Neck) Dimensions & Weight Charts
Dimensional tables for Type 11 welding neck flanges across PN 10, PN 16, PN 25, and PN 40 pressure classes.
EN 1092-1 Type 11 PN 10 Weld Neck Flange (DN 200 – DN 1200)
| DN | Pipe OD (d1) | Flange OD (D) | PCD (k) | Thickness (b) | Neck Hub (d3) | RF Dia (d4) | Hole Dia (d2) | Bolts | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|
| 200 | 219.1 | 340 | 295 | 24 | 234 | 268 | 22 | 8 × M20 | 11.60 |
| 250 | 273.0 | 395 | 350 | 26 | 292 | 320 | 22 | 12 × M20 | 15.80 |
| 300 | 323.9 | 445 | 400 | 26 | 342 | 370 | 22 | 12 × M20 | 18.30 |
| 350 | 355.6 | 505 | 460 | 26 | 385 | 430 | 22 | 16 × M20 | 25.30 |
| 400 | 406.4 | 565 | 515 | 26 | 440 | 482 | 26 | 16 × M24 | 30.60 |
| 450 | 457.0 | 615 | 565 | 28 | 488 | 532 | 26 | 20 × M24 | 35.10 |
| 500 | 508.0 | 670 | 620 | 28 | 542 | 585 | 26 | 20 × M24 | 40.50 |
| 600 | 610.0 | 780 | 725 | 30 | 642 | 685 | 30 | 20 × M27 | 52.90 |
| 800 | 813.0 | 1015 | 950 | 38 | 850 | 905 | 33 | 24 × M30 | 102.00 |
| 1000 | 1016.0 | 1230 | 1160 | 44 | 1052 | 1110 | 36 | 28 × M33 | 161.00 |
| 1200 | 1219.0 | 1455 | 1380 | 55 | 1256 | 1330 | 39 | 32 × M36 | 258.00 |
EN 1092-1 Type 11 PN 16 Weld Neck Flange (DN 15 – DN 600)
| DN | Pipe OD (d1) | Flange OD (D) | PCD (k) | Thickness (b) | Neck Hub (d3) | RF Dia (d4) | Hole Dia (d2) | Bolts | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|
| 15 | 21.3 | 95 | 65 | 16 | 32 | 45 | 14 | 4 × M12 | 0.68 |
| 25 | 33.7 | 115 | 85 | 18 | 46 | 68 | 14 | 4 × M12 | 1.09 |
| 50 | 60.3 | 165 | 125 | 18 | 74 | 102 | 18 | 4 × M16 | 2.53 |
| 80 | 88.9 | 200 | 160 | 20 | 105 | 138 | 18 | 8 × M16 | 3.92 |
| 100 | 114.3 | 220 | 180 | 20 | 131 | 158 | 18 | 8 × M16 | 4.62 |
| 150 | 168.3 | 285 | 240 | 22 | 184 | 212 | 22 | 8 × M20 | 7.81 |
| 200 | 219.1 | 340 | 295 | 24 | 235 | 268 | 22 | 12 × M20 | 11.50 |
| 250 | 273.0 | 405 | 355 | 26 | 292 | 320 | 26 | 12 × M24 | 16.70 |
| 300 | 323.9 | 460 | 410 | 28 | 344 | 378 | 26 | 12 × M24 | 22.10 |
| 400 | 406.4 | 580 | 525 | 32 | 445 | 490 | 30 | 16 × M27 | 41.10 |
| 600 | 610.0 | 840 | 770 | 40 | 670 | 725 | 36 | 20 × M33 | 96.00 |
EN 1092-1 Type 11 PN 40 Weld Neck Flange (DN 15 – DN 400)
| DN | Pipe OD (d1) | Flange OD (D) | PCD (k) | Thickness (b) | Neck Hub (d3) | RF Dia (d4) | Hole Dia (d2) | Bolts | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|---|
| 15 | 21.3 | 95 | 65 | 16 | 32 | 45 | 14 | 4 × M12 | 0.77 |
| 25 | 33.7 | 115 | 85 | 18 | 46 | 68 | 14 | 4 × M12 | 1.30 |
| 50 | 60.3 | 165 | 125 | 20 | 75 | 102 | 18 | 4 × M16 | 2.85 |
| 80 | 88.9 | 200 | 160 | 24 | 105 | 138 | 18 | 8 × M16 | 4.78 |
| 100 | 114.3 | 235 | 190 | 24 | 134 | 162 | 22 | 8 × M20 | 6.46 |
| 150 | 168.3 | 300 | 250 | 28 | 192 | 218 | 26 | 8 × M24 | 11.70 |
| 200 | 219.1 | 375 | 320 | 34 | 244 | 285 | 30 | 12 × M27 | 21.00 |
| 250 | 273.0 | 450 | 385 | 38 | 306 | 345 | 33 | 12 × M30 | 34.20 |
| 300 | 323.9 | 515 | 450 | 42 | 362 | 410 | 33 | 16 × M30 | 47.60 |
| 400 | 406.4 | 660 | 585 | 50 | 462 | 535 | 39 | 16 × M36 | 98.00 |
Flat & Blind Profiles
EN 1092-1 Type 01 (Plate) & Type 05 (Blind) Charts
Standard dimensions and nominal weights for flat slip-on plate flanges and solid blind flange closures.
EN 1092-1 Type 01 PN 16 Plate Flanges (DN 15 – DN 500)
| DN | Pipe OD | Flange Bore (d1) | OD (D) | PCD (k) | Thickness (b) | Hole Dia (d2) | Bolt Holes | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|
| 15 | 21.3 | 22.0 | 95 | 65 | 14 | 14 | 4 × M12 | 0.67 |
| 25 | 33.7 | 34.5 | 115 | 85 | 16 | 14 | 4 × M12 | 1.11 |
| 50 | 60.3 | 61.5 | 165 | 125 | 20 | 18 | 4 × M16 | 2.72 |
| 80 | 88.9 | 90.5 | 200 | 160 | 20 | 18 | 8 × M16 | 3.59 |
| 100 | 114.3 | 116.0 | 220 | 180 | 22 | 18 | 8 × M16 | 4.38 |
| 150 | 168.3 | 170.5 | 285 | 240 | 24 | 22 | 8 × M20 | 7.12 |
| 200 | 219.1 | 221.5 | 340 | 295 | 26 | 22 | 12 × M20 | 9.71 |
| 250 | 273.0 | 276.5 | 405 | 355 | 29 | 26 | 12 × M24 | 14.16 |
| 300 | 323.9 | 327.5 | 460 | 410 | 32 | 26 | 12 × M24 | 18.93 |
| 400 | 406.4 | 411.0 | 580 | 525 | 38 | 30 | 16 × M27 | 35.75 |
| 500 | 508.0 | 513.5 | 715 | 650 | 46 | 33 | 20 × M30 | 63.83 |
EN 1092-1 Type 05 PN 16 Blind Flanges (DN 15 – DN 500)
| DN | Outer Diameter (D) | PCD (k) | Thickness (b) | Hole Dia (d2) | Bolt Thread | Holes | Weight (Kg) |
|---|---|---|---|---|---|---|---|
| 15 | 95 | 65 | 16 | 14 | M12 | 4 | 0.81 |
| 25 | 115 | 85 | 18 | 14 | M12 | 4 | 1.38 |
| 50 | 165 | 125 | 18 | 18 | M16 | 4 | 2.88 |
| 80 | 200 | 160 | 20 | 18 | M16 | 8 | 4.61 |
| 100 | 220 | 180 | 20 | 18 | M16 | 8 | 5.65 |
| 150 | 285 | 240 | 22 | 22 | M20 | 8 | 10.50 |
| 200 | 340 | 295 | 24 | 22 | M20 | 12 | 16.20 |
| 250 | 405 | 355 | 26 | 26 | M24 | 12 | 25.00 |
| 300 | 460 | 410 | 28 | 26 | M24 | 12 | 35.10 |
| 400 | 580 | 525 | 32 | 30 | M27 | 16 | 63.50 |
| 500 | 715 | 650 | 44 | 33 | M30 | 20 | 133.00 |
Operating Parameters
EN 1092-1 Flange Pressure – Temperature Ratings
Maximum allowable working pressures (in bar) categorized by operating temperature for standard carbon and structural steel flanges.
| Rating Class | -10°C to 200°C | 250°C | 300°C | 350°C | 400°C | 425°C | 450°C |
|---|---|---|---|---|---|---|---|
| PN 6 | 6.0 bar | 5.5 bar | 5.0 bar | — | — | — | — |
| PN 10 | 10.0 bar | 9.0 bar | 8.0 bar | 7.0 bar | 6.0 bar | — | — |
| PN 16 | 16.0 bar | 15.0 bar | 13.0 bar | 11.0 bar | 9.0 bar | — | — |
| PN 25 | 25.0 bar | 24.0 bar | 21.0 bar | 17.0 bar | 14.0 bar | 12.0 bar | 9.0 bar |
| PN 40 | 40.0 bar | 38.0 bar | 33.0 bar | 28.0 bar | 23.0 bar | 20.0 bar | 15.0 bar |
| PN 63 | 63.0 bar | 60.0 bar | 52.0 bar | 43.0 bar | 35.0 bar | 31.0 bar | 23.0 bar |
| PN 100 | 100.0 bar | 95.0 bar | 83.0 bar | 70.0 bar | 57.0 bar | 50.0 bar | 37.0 bar |
| PN 160 | 160.0 bar | 152.0 bar | 132.0 bar | 112.0 bar | 92.0 bar | 80.0 bar | 60.0 bar |
Engineering Insights
Frequently Asked Questions on EN 1092-1 Flanges
What is the difference between EN 1092-1 and legacy DIN standards?
EN 1092-1 is the unified European standard that harmonized and replaced historical national DIN standards (including DIN 2501, 2632, 2633). While the bolt circles (PCD) and bolt hole quantities are largely interchangeable across common sizes, EN 1092-1 introduces modernised flange facing notations (such as Type B1 and B2 instead of Form C/D/E) and updated material pressure-temperature rating matrices.
What do Type B1 and Type B2 raised face finishes represent?
Type B denotes a standard raised face. B1 represents a standard turning facing roughness (Ra 3.2 μm to 12.5 μm) commonly paired with standard spiral wound or sheet gaskets. Type B2 specifies a fine machined finish (Ra 0.8 μm to 3.2 μm) engineered for specialized, non-metallic, or critical vacuum/low-emission gasket sealing interfaces.
Can EN 1092-1 flanges mate with ASME B16.5 piping systems?
In general, EN 1092-1 metric flanges and ASME B16.5 imperial flanges do not bolt together directly because pitch circle diameters (PCD), bolt hole counts, and overall thicknesses differ. For interface transitions, engineered transition spools, custom drilled converter flanges, or adapter fittings must be specified.
Which test documentation is supplied with export shipments?
Every delivery includes full Mill Test Certificates certified to EN 10204 Type 3.1 detailing chemical heat analysis, mechanical tensile and yield results, impact testing, and hardness measurements. Third-party inspection reports (EN 10204 Type 3.2) can be issued through agencies such as DNV, TUV, Bureau Veritas, or Lloyds.
Need a Technical Offer for Your Next Project?
Have a query? Email us[email protected]
Call now+91 9869506920