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Flanges & Pipe Fittings
Flanges are essential piping components used to connect pipes, valves, pumps, and other equipment in a piping system. They provide easy assembly and disassembly for inspection, cleaning, or modification of pipelines.
Moksh Tubes & Fittings LLP, we supply a complete range of industrial flanges including stainless steel flanges, carbon steel flanges, alloy steel flanges, duplex & super duplex flanges, nickel alloy flanges, titanium flanges, and copper alloy flanges.
Our pipe flanges comply with ASTM, ASME, ANSI, DIN, EN, and BS standards, designed to withstand high pressure, temperature, and corrosive environments. These flange joints are widely used in oil & gas, power generation, chemical, and marine industries.
Specifications
| Category | Details |
|---|---|
| Material | Stainless Steel, Carbon Steel, Alloy Steel, Duplex & Super Duplex, Nickel Alloys, Titanium, Copper Alloys |
| Grades | ASTM/ASME/DIN/BS/EN certified grades – all major alloys available |
| Size Range | ½” NB to 72” NB (custom flange sizes available) |
| Pressure Ratings | Class 150 to Class 2500 / PN 6 to PN 400 |
| Types | Weld Neck Flange, Slip-On Flange, Blind Flange, Socket Weld Flange, Threaded Flange, Lap Joint Flange, Spectacle Blind Flange, Orifice Flange, Long Weld Neck Flange |
| Face Types | Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ) |
| Standards | ASME B16.5, ASME B16.47 (Series A & B), MSS-SP-44, BS 4504, DIN EN 1092-1 |
| Finishes | Serrated, Smooth, Stock Finish, Mirror Polish (for sanitary stainless flanges) |
Charts
Weight Chart
| NPS (in) | OD (mm) | BCD (mm) | Bolt Holes (No. × Dia) | Flange Thk (mm) | RF Height (mm) |
|---|---|---|---|---|---|
| ½ | 89 | 60.3 | 4 × 15.9 | 11.2 | 1.6 |
| ¾ | 98 | 69.9 | 4 × 15.9 | 12.7 | 1.6 |
| 1 | 108 | 79.4 | 4 × 15.9 | 14.3 | 1.6 |
| 1¼ | 117 | 88.9 | 4 × 15.9 | 15.9 | 1.6 |
| 1½ | 127 | 98.4 | 4 × 15.9 | 15.9 | 1.6 |
| 2 | 152 | 120.7 | 4 × 19.1 | 16.0 | 1.6 |
| 2½ | 178 | 139.7 | 4 × 19.1 | 17.5 | 1.6 |
| 3 | 191 | 152.4 | 4 × 19.1 | 19.1 | 1.6 |
| 4 | 229 | 190.5 | 8 × 19.1 | 22.3 | 1.6 |
| 5 | 254 | 215.9 | 8 × 22.2 | 23.9 | 1.6 |
| 6 | 279 | 241.3 | 8 × 22.2 | 25.4 | 1.6 |
| 8 | 343 | 298.5 | 8 × 22.2 | 28.6 | 1.6 |
| 10 | 406 | 362.0 | 12 × 25.4 | 30.2 | 1.6 |
| 12 | 483 | 431.8 | 12 × 25.4 | 32.0 | 1.6 |
| 14 | 533 | 476.3 | 12 × 28.6 | 35.0 | 1.6 |
| 16 | 597 | 539.8 | 16 × 28.6 | 37.0 | 1.6 |
| 18 | 635 | 577.8 | 16 × 31.8 | 40.0 | 1.6 |
| 20 | 698 | 635.0 | 20 × 31.8 | 42.0 | 1.6 |
| 24 | 813 | 749.3 | 20 × 34.9 | 48.0 | 1.6 |
Flanges Dimensions
Expanded Table (for one item – Flanges Dimensions)
| NPS (in) | OD (mm) | Bolt Circle (mm) | No. of Bolts | Bolt Size | RF Raised Face Thickness (mm) | Flange Thickness (mm) |
|---|---|---|---|---|---|---|
| ½ | 95 | 66.5 | 4 | M12 | 2.0 | 14 |
| ¾ | 105 | 76.2 | 4 | M12 | 2.0 | 16 |
| 1 | 115 | 85.7 | 4 | M16 | 2.0 | 17 |
| 1 ¼ | 125 | 95.2 | 4 | M16 | 2.0 | 18 |
| 1 ½ | 140 | 107.9 | 4 | M16 | 2.0 | 19 |
| 2 | 165 | 127.0 | 8 | M16 | 2.0 | 20 |
| 2 ½ | 190 | 149.2 | 8 | M16 | 2.0 | 22 |
| 3 | 210 | 168.3 | 8 | M20 | 2.0 | 24 |
| 4 | 255 | 200.0 | 8 | M20 | 2.0 | 27 |
| 5 | 280 | 235.0 | 8 | M22 | 2.0 | 29 |
| 6 | 320 | 269.9 | 12 | M22 | 2.0 | 32 |
| 8 | 380 | 330.2 | 12 | M24 | 2.0 | 38 |
| 10 | 445 | 387.4 | 16 | M27 | 2.0 | 44 |
| 12 | 505 | 451.0 | 16 | M30 | 2.0 | 48 |
| 14 | 545 | 476.0 | 20 | M30 | 2.0 | 51 |
| 16 | 610 | 540.0 | 20 | M33 | 2.0 | 55 |
| 18 | 685 | 600.0 | 24 | M33 | 2.0 | 58 |
| 20 | 750 | 660.0 | 24 | M36 | 2.0 | 62 |
| 24 | 870 | 775.0 | 24 | M39 | 2.0 | 70 |
Flange Dimensions
Expanded Table (for one item – Class 600 Flanges)
| NPS (in) | OD of Flange (mm) | Thickness (mm) | Bolt Circle Dia. (mm) | Bolt Hole Dia. (mm) | No. of Bolts |
|---|---|---|---|---|---|
| ½ | 95 | 22.3 | 66.7 | 16 | 4 |
| ¾ | 117 | 23.9 | 82.6 | 16 | 4 |
| 1 | 124 | 26.9 | 89.0 | 19 | 4 |
| 1 ¼ | 133 | 28.7 | 98.6 | 19 | 4 |
| 1 ½ | 156 | 30.2 | 114.3 | 22 | 4 |
| 2 | 165 | 32.0 | 127.0 | 22 | 8 |
| 2 ½ | 190 | 35.1 | 149.0 | 25 | 8 |
| 3 | 210 | 38.1 | 168.0 | 25 | 8 |
| 4 | 254 | 44.5 | 200.0 | 29 | 8 |
| 5 | 279 | 47.8 | 235.0 | 29 | 8 |
| 6 | 318 | 55.6 | 269.0 | 32 | 12 |
| 8 | 381 | 63.5 | 330.0 | 35 | 12 |
| 10 | 445 | 69.9 | 387.0 | 38 | 16 |
| 12 | 521 | 76.2 | 451.0 | 41 | 16 |
| 14 | 584 | 82.6 | 514.0 | 45 | 20 |
| 16 | 648 | 88.9 | 572.0 | 51 | 20 |
| 18 | 711 | 95.3 | 635.0 | 54 | 24 |
| 20 | 775 | 101.6 | 699.0 | 54 | 24 |
| 24 | 914 | 114.3 | 813.0 | 64 | 24 |
Flange Dimensions
Expanded Table (for one item – Class 600 Flanges)
| NPS (in) | OD of Flange (D) | Bolt Circle Dia (K) | No. of Bolts | Bolt Dia (M) | RF Raised Face (h) | Flange Thickness (T) |
|---|---|---|---|---|---|---|
| ½ | 95 | 66.7 | 4 | M12 | 2.0 | 14.3 |
| ¾ | 117 | 82.6 | 4 | M16 | 2.0 | 15.9 |
| 1 | 124 | 89.0 | 4 | M16 | 2.0 | 17.5 |
| 1¼ | 133 | 98.6 | 4 | M16 | 2.0 | 19.1 |
| 1½ | 156 | 114.3 | 4 | M20 | 2.0 | 20.7 |
| 2 | 165 | 127.0 | 8 | M16 | 2.0 | 22.3 |
| 2½ | 190 | 149.2 | 8 | M20 | 2.0 | 28.6 |
| 3 | 210 | 168.3 | 8 | M20 | 2.0 | 30.2 |
| 4 | 273 | 222.3 | 8 | M24 | 2.0 | 36.5 |
| 5 | 330 | 279.4 | 8 | M27 | 2.0 | 42.9 |
| 6 | 356 | 317.5 | 12 | M27 | 2.0 | 45.0 |
| 8 | 419 | 381.0 | 12 | M30 | 2.0 | 52.4 |
| 10 | 508 | 470.0 | 16 | M30 | 2.0 | 60.3 |
| 12 | 559 | 533.0 | 16 | M33 | 2.0 | 66.7 |
| 14 | 610 | 584.0 | 20 | M33 | 2.0 | 69.9 |
| 16 | 686 | 648.0 | 20 | M36 | 2.0 | 76.2 |
| 18 | 743 | 711.0 | 20 | M36 | 2.0 | 82.6 |
| 20 | 787 | 775.0 | 24 | M39 | 2.0 | 88.9 |
| 24 | 914 | 914.0 | 24 | M45 | 2.0 | 101.6 |
Flange Dimensions
Expanded Table (for one item – Class 900 Flanges)
| NPS (in) | OD (mm) | Raised Face Dia (mm) | Bolt Circle Dia (mm) | Bolt Holes (Qty × Dia mm) | Flange Thickness (mm) |
|---|---|---|---|---|---|
| ½ | 95 | 35 | 66.5 | 4 × 16 | 30 |
| ¾ | 105 | 43 | 76 | 4 × 16 | 32 |
| 1 | 120 | 51 | 86 | 4 × 19 | 38 |
| 1¼ | 140 | 64 | 95 | 4 × 19 | 38 |
| 1½ | 150 | 73 | 111 | 4 × 22 | 44 |
| 2 | 165 | 92 | 127 | 8 × 19 | 48 |
| 2½ | 190 | 105 | 149 | 8 × 22 | 51 |
| 3 | 210 | 127 | 168 | 8 × 22 | 54 |
| 4 | 265 | 157 | 216 | 8 × 25 | 62 |
| 5 | 305 | 186 | 254 | 8 × 29 | 70 |
| 6 | 355 | 216 | 279 | 12 × 29 | 76 |
| 8 | 445 | 270 | 343 | 12 × 32 | 89 |
| 10 | 530 | 324 | 419 | 16 × 32 | 102 |
| 12 | 610 | 381 | 489 | 16 × 35 | 114 |
| 14 | 665 | 413 | 559 | 20 × 35 | 127 |
| 16 | 755 | 470 | 616 | 20 × 38 | 140 |
| 18 | 840 | 533 | 686 | 20 × 41 | 152 |
| 20 | 910 | 584 | 749 | 24 × 41 | 165 |
| 24 | 1090 | 705 | 940 | 24 × 45 | 191 |
Flange Dimensions
Expanded Table (for one item – Class 900 Flanges)
| NPS | OD of Flange (D) | Bolt Circle (K) | No. of Bolts | Bolt Hole Dia (L) | Raised Face Dia (R) | Hub Dia (C) | Flange Thickness (T) |
|---|---|---|---|---|---|---|---|
| ½ | 95 | 66 | 4 | 16 | 35 | 21 | 38 |
| ¾ | 120 | 82 | 4 | 19 | 43 | 27 | 44 |
| 1 | 135 | 92 | 4 | 22 | 51 | 33 | 51 |
| 1 ½ | 170 | 120 | 4 | 25 | 73 | 48 | 67 |
| 2 | 205 | 146 | 8 | 25 | 92 | 60 | 76 |
| 3 | 265 | 190 | 8 | 29 | 127 | 89 | 95 |
| 4 | 310 | 235 | 8 | 32 | 157 | 114 | 114 |
| 6 | 420 | 330 | 12 | 38 | 216 | 168 | 152 |
| 8 | 545 | 419 | 12 | 45 | 270 | 219 | 191 |
| 10 | 655 | 508 | 16 | 51 | 324 | 273 | 229 |
| 12 | 735 | 559 | 20 | 54 | 381 | 324 | 254 |
| 14 | 840 | 635 | 20 | 57 | 413 | 356 | 279 |
| 16 | 915 | 705 | 24 | 64 | 470 | 406 | 305 |
| 18 | 1015 | 775 | 24 | 70 | 533 | 457 | 330 |
| 20 | 1110 | 870 | 28 | 73 | 584 | 508 | 356 |
| 24 | 1325 | 1065 | 32 | 83 | 705 | 610 | 406 |
Grades Available
Flanges are available in:
| Material | Grades |
|---|---|
| Stainless Steel Flanges | 304, 304L, 316, 316L, 310, 321, 347 |
| Carbon Steel Flanges | ASTM A105, ASTM A350 LF2, ASTM A516 (MS Flange) |
| Alloy Steel Flanges | ASTM A182 F1, F5, F9, F11, F22 |
| Duplex & Super Duplex Flanges | UNS S31803, S32205, S32750, S32760 |
| Nickel Alloy Flanges | Inconel, Monel, Hastelloy |
| Titanium Flanges | Grades 2, 5 |
| Copper Alloy Flanges | Brass, Bronze, Cu-Ni 70/30, Cu-Ni 90/10 |
NICKLE ALLOYS
STAINLESS STEEL
DUPLEX & SUPER
TITANIUM ALLOYS
RARE TO ALLOYS
CARBON ALLOYS
Applications
Flanges are used in diverse industries:
Oil & Gas
- Weld neck flanges, blind flanges, spectacle blind flanges for pipelines
- Solutions for offshore platforms
Power Generation
- Alloy flanges for boilers and turbines
- High-pressure piping systems
Marine & Shipbuilding
- Copper-nickel flanges, duplex flanges
- Stainless steel pipe flanges
Chemical & Industrial Plants
- Orifice flanges for flow measurement
- Corrosion-resistant stainless flanges for tanks and process lines
Automotive & Aerospace
- Exhaust pipe flanges
- Lightweight titanium flanges for defense and aerospace projects
Construction & Infrastructure
- Flanges for HVAC systems
- Water treatment and fire protection networks
Uses of Flanges
Flanges are used extensively across multiple industries, including:
Easy Connections
Connect pipelines and equipment easily (flange joint, flange connection)
Leak Prevention
Provides sealing against leaks using flange gaskets and sealants
Inspection & Cleaning
Allows easy inspection, cleaning, or modification of piping systems
Flow Measurement
Supports flow measurement with orifice flanges and spectacle blind flanges
Flexible Usage
Suitable for both temporary and permanent piping connections
Advantages of Flanges
Precision Engineering
Tight tolerances for perfect fit
Material Versatility
Stainless, carbon, nickel, titanium, and copper alloys (stainless flange, MS flange)
Compliance
Meets ASME, ASTM, ANSI, DIN, EN, BS standards
Custom Options
Non-standard sizes, high-pressure ratings, and coatings available
Durable & Reliable
Withstands extreme pressure and corrosive media
WHY CHOOSE US?
FAQ's
What is a flange?
A flange is a mechanical component used to connect pipes, valves, pumps, and other equipment in a piping system. It ensures a secure joint and allows for easy assembly, inspection, and maintenance of pipelines.
What is PCD in flange?
PCD (Pitch Circle Diameter) in a flange is the diameter of the circle formed by the centers of the bolt holes. Correct PCD measurement is essential for proper alignment of flange joints.
How to measure flange size?
To measure a flange size, note the Outer Diameter (OD), Bolt Circle Diameter (PCD), number of bolt holes, and flange thickness. Accurate measurement ensures the pipe flange fits perfectly in your system.
What is a flange coupling?
A flange coupling is a type of mechanical connection used to join two shafts or pipes with flanges, bolts, and gaskets. It provides a robust, leak-proof connection in industrial and piping applications.
What materials are flanges made of?
Flanges are available in Stainless Steel (304, 316, 310), Carbon Steel (A105, A350 LF2), Alloy Steel (F11, F22), Duplex & Super Duplex, Nickel Alloys (Inconel, Monel), Titanium, and Copper Alloys (Cu-Ni, Brass, Bronze).
Contact Us
Looking for high-quality stainless steel flanges, carbon steel flanges, or alloy flanges?
Contact Moksh Tubes & Fittings LLP