Nishra Overseas LLP is a manufacturer, producer, and exporter of Reducing Flanges that are custom-built to meet the unique needs of various sectors. We are also growing our international footprint. Pipes of different sizes are part of a complicated piping network, and they may be built so that they need to be changed frequently. To adapt to the incoming stream of variations, the pipe's diameter is regularly changed. A stainless steel reducing flange comes into play here. Whether it is made of Monel, Inconel, Hastelloy, Carbon Steel, or Alloy Steel, it may easily link pipes of different sizes. For high-pressure systems like boilers and condensers, ANSI B16.5 Alloy Steel Reducing Flanges are appropriate because they can withstand high pressure.
The A182 F316L RTJ Reducing Flanges are unique in that they are made up of two sections that form rings. These rings are welded together using equal-sized pipes, and the halves are fitted together for maximum fastening. The SS Reducing Flanges are available in many pressure classes, including 1500 and 600. Duplex steel non-reducing flanges and stainless steel flanges are two examples of the various material grades. Various pressure calculations are available, including PN16 through PN64 and 10 bar through 60 bars. Types of carbon steel reducing flanges are available that are very resistant to wear and tear.
Socket Weld Reduction Flanges have a socket welded with a decreasing neck and are used to connect two different diameter high-pressure pipes. A stronger seal is achieved, however, by focussing the surface pressure by reducing the surface area of the seal using Raised Face Reducing Flanges. Ductile Iron Reducing Flanges are utilized in high-corrosion settings. Cast Iron Reducing Flanges are produced by us using the best raw materials and are offered to our clients at competitive pricing.
The B16.47 Reducing Flange is a great way to join flanges of different sizes and comes in a variety of types and pressure classifications. The cheapest and easiest way to match two flanges of various sizes is reportedly the 4 Inch To 3 Inch Reducing Flange. To transmit the stress to the pipe and lessen it on the flange, a large diameter weld neck reducing flange is utilized.
We are a Stainless Steel Reducing Flange manufacturer in India, and we offer these Inconel Reducing Flange, Hastelloy Reducing Flange, Monel Reducing Flange, Alloy 20 Reducing Flange, Aluminium Reducing Flange, Nickel Reducing Flange, Duplex Reducing Flange, Super Duplex Reducing Flange, Incoloy Reducing Flange, Copper Reducing Flange, Copper Nickel Reducing Flange, Brass Reducing Flange, 254 Smo Reducing Flange, and Titanium Reducing Flange in all standards that are common in the world.
| Size | 1/2" (15 NB) to 48" (1200NB) |
| Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
| Pressure Ratings | Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Carbon Steel Slip On Flanges/ SORF Flanges | ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8 |
| Stainless Steel Slip On Flanges/ SORF Flanges | ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L |
| Alloy Steel Slip On Flanges/ SORF Flanges | ASTM A182 F1, F5, F9, F11, F22, F91 |
| Special Alloy Slip On Flanges/ SORF Flanges | Duplex, Super Duplex, Nickel Alloys |
| Flange Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Coating/Surface Treatment | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Socket Weld Flange |
| Value Added Services | CNC Machining, Customised Flanges |
| NPS For Normal Pipe Size In (Inch) | DN In (Millimeter) | FLANGE OD (OUTSIDE DAIMETER) A MM | FLANGES WALL THICKNESS (D) MM | SORF FLANGES WEIGHT (KILOGRAM) | WNRF FLANGES WEIGHT (KILOGRAM) | BLRF FLANGES WEIGHT (KILOGRAM) |
| 1/ 2 | 15 | 88.9 | 11.2 | 0.4 | 0.5 | 0.4 |
| 3/ 4 | 20 | 98.6 | 12.7 | 0.6 | 0.7 | 0.6 |
| 1 | 25 | 108 | 14.2 | 0.8 | 1 | 0.9 |
| 1 1/ 4 | 32 | 117.3 | 15.7 | 1 | 1.3 | 1.2 |
| 1 1/ 2 | 40 | 127 | 17.5 | 1.3 | 1.7 | 1.5 |
| 2 | 50 | 152.4 | 19.1 | 2.1 | 2.6 | 2.4 |
| 2 1/ 2 | 65 | 177.8 | 22.4 | 3.3 | 4.1 | 3.9 |
| 3 | 80 | 190.5 | 23.9 | 3.9 | 4.9 | 4.9 |
| 3 1/ 2 | 90 | 215.9 | 23.9 | 4.8 | 6.1 | 6.2 |
| 4 | 100 | 228.6 | 23.9 | 5.3 | 6.8 | 7.0 |
| 5 | 125 | 254 | 23.9 | 6.1 | 8.6 | 8.6 |
| 6 | 150 | 279.4 | 25.4 | 7.5 | 10.6 | 11.3 |
| 8 | 200 | 342.9 | 28.4 | 12.1 | 17.6 | 19.6 |
| 10 | 250 | 406.4 | 30.2 | 16.5 | 24 | 28.6 |
| 12 | 300 | 482.6 | 31.8 | 26.2 | 36.5 | 43.2 |
| 14 | 350 | 533.4 | 35.1 | 34.6 | 48.4 | 58.1 |
| 16 | 400 | 596.9 | 36.6 | 44.8 | 60.6 | 76.1 |
| 18 | 450 | 635 | 39.6 | 48.9 | 68.3 | 93.7 |
| 20 | 500 | 698.5 | 42.9 | 61.9 | 84.5 | 122.0 |
| 24 | 600 | 812.8 | 47.8 | 86.9 | 115 | 185.0 |
| NPS For Normal Pipe Size Size in Inch | NPS For Normal Pipe Size Size in Millimeter | (O.D.) For Outside Diameter | Wall Thickness Of Flange | Diameter Of Hub Outer | Diameter Of Weld Neck Outer | Length Of Weld Neck | Flange Bore | Diameter Of (RF) Raised Face | Height Of (RF) Raised Face | PCD | Weld Face |
| - | - | (A) | (B) | (C) | (D) | (E) | (F) | (G) | (H) | (I) | (J) |
| 1/2 | 15 | 90 | 9.6 | 30 | 21.3 | 46 | - | 34.9 | 2 | 60.3 | 1.6 |
| 3/4 | 20 | 100 | 11.2 | 38 | 26.7 | 51 | 42.9 | 2 | 69.9 | 1.6 | |
| 1 | 25 | 110 | 12.7 | 49 | 33.4 | 54 | 50.8 | 2 | 79.4 | 1.6 | |
| 1 1/4 | 32 | 115 | 14.3 | 59 | 42.2 | 56 | 63.5 | 2 | 88.9 | 1.6 | |
| 1 1/2 | 40 | 125 | 15.9 | 65 | 48.3 | 60 | 73 | 2 | 98.4 | 1.6 | |
| 2 | 50 | 150 | 17.5 | 78 | 60.3 | 62 | 92.1 | 2 | 120.7 | 1.6 | |
| 2 1/2 | 65 | 180 | 20.7 | 90 | 73 | 68 | 104.8 | 2 | 139.7 | 1.6 | |
| 3 | 80 | 190 | 22.3 | 108 | 88.9 | 68 | 127 | 2 | 152.4 | 1.6 | |
| 3 1/2 | 90 | 215 | 22.3 | 122 | 101.6 | 70 | 139.7 | 2 | 177.8 | 1.6 | |
| 4 | 100 | 230 | 22.3 | 135 | 114.3 | 75 | 157.2 | 2 | 190.5 | 1.6 | |
| 5 | 125 | 255 | 22.3 | 164 | 141.3 | 87 | 185.7 | 2 | 215.9 | 1.6 | |
| 6 | 150 | 280 | 23.9 | 192 | 168.3 | 87 | 215.9 | 2 | 241.3 | 1.6 | |
| 8 | 200 | 345 | 27 | 246 | 219.1 | 100 | 269.9 | 2 | 298.5 | 1.6 | |
| 10 | 250 | 405 | 28.6 | 305 | 273 | 100 | 323.8 | 2 | 362 | 1.6 | |
| 12 | 300 | 485 | 30.2 | 365 | 323.8 | 113 | 381 | 2 | 431.8 | 1.6 | |
| 14 | 350 | 535 | 33.4 | 400 | 355.6 | 125 | 412.8 | 2 | 476.3 | 1.6 | |
| 16 | 400 | 595 | 35 | 457 | 406.4 | 125 | 469.9 | 2 | 539.8 | 1.6 | |
| 18 | 450 | 635 | 38.1 | 505 | 457.2 | 138 | 533.4 | 2 | 577.9 | 1.6 | |
| 20 | 500 | 700 | 41.3 | 559 | 508 | 143 | 584.2 | 2 | 635 | 1.6 | |
| 24 | 600 | 815 | 46.1 | 663 | 610 | 151 | 692.2 | 2 | 749.3 | 1.6 |
| NPS For Normal Pipe Size | O.D. For Outside Daimeter (A) | Diameter Of Raised Face (RF) (B) | Wall Thickness Of (C) | Diameter Of Hub at Base (J) | Length Of Hub (L) | Thread (minimum) Length (N) | Number of Bolt Holes
| Approx. Weight In Kilogram (Lbs.) |
|---|---|---|---|---|---|---|---|---|
| 1/2 | 3 1/2 | 1 3/8 | 7/16 | 1 3/16 | 5/8 | 5/8 | 4 | 2 |
| 3/4 | 3 7/8 | 1 11/16 | 1/2 | 1 1/2 | 5/8 | 5/8 | 4 | 2 |
| 1 | 4 1/4 | 2 | 9/16 | 1 15/16 | 11/16 | 11/16 | 4 | 2 |
| 1 1/4 | 4 5/8 | 2 1/2 | 5/8 | 2 5/16 | 13/16 | 13/16 | 4 | 3 |
| 1 1/2 | 5 | 2 7/8 | 11/16 | 2 9/16 | 7/8 | 7/8 | 4 | 3 |
| 2 | 6 | 3 5/8 | 3/4 | 3 7/16 | 1 | 1 | 4 | 5 |
| 2 1/2 | 7 | 4 1/8 | 7/8 | 3 9/16 | 1 1/8 | 1 1/8 | 4 | 7 |
| 3 | 7 1/2 | 5 | 15/16 | 4 1/4 | 1 3/16 | 1 3/16 | 4 | 8 |
| 3 1/2 | 8 1/2 | 5 1/2 | 15/16 | 4 13/16 | 1 1/4 | 1 1/4 | 8 | 11 |
| 4 | 9 | 6 3/16 | 15/16 | 5 5/16 | 1 5/16 | 1 5/16 | 8 | 13 |
| 5 | 10 | 7 5/16 | 15/16 | 6 7/16 | 1 7/16 | 1 7/16 | 8 | 15 |
| 6 | 11 | 8 1/2 | 1 | 7 9/16 | 1 9/16 | 1 9/16 | 8 | 19 |
| 8 | 13 1/2 | 10 5/8 | 1 1/8 | 9 11/16 | 1 3/4 | 1 3/4 | 8 | 30 |
| 10 | 16 | 12 3/4 | 1 3/16 | 12 | 1 15/16 | 1 15/16 | 12 | 43 |
| 12 | 19 | 15 | 1 1/4 | 14 3/8 | 2 3/16 | 2 3/16 | 12 | 64 |
| 14 | 21 | 16 1/4 | 1 3/8 | 15 3/4 | 2 1/4 | 2 1/4 | 12 | 85 |
| 16 | 23 1/2 | 18 1/2 | 1 7/16 | 18 | 2 1/2 | 2 1/2 | 16 | 93 |
| 18 | 25 | 21 | 1 9/16 | 19 7/8 | 2 11/16 | 2 11/16 | 16 | 120 |
| 20 | 27 1/2 | 23 | 1 11/16 | 22 | 2 7/8 | 2 7/8 | 20 | 155 |
| 22 | 29 1/2 | 25 1/4 | 1 13/16 | 24 | 3 1/8 | 3 1/8 | 20 | 159 |
| 24 | 32 | 27 1/4 | 1 7/8 | 26 1/8 | 3 1/4 | 3 1/4 | 20 | 210 |
Reducing flanges are specialized pipe flanges used to connect two pipes of different diameters. They feature a conical shape with a smaller circumference on the outside than the inside, allowing them to fit over one pipe's end and into the aperture of another. This allows you to connect to different-sized pipes while maintaining correct flow and pressure between them. Reducing flanges offer flexibility when installing piping systems in industrial settings and allow for adjustments, particularly in off-angle connections. Furthermore, their conically shaped design reduces turbulence and stress on associated components or equipment while offering sufficient strength to withstand high pressures.
Reducing flanges link two different sized pipe openings and often have a lower pressure rating than the larger opening. These components have a concentric welding angle on both sides of the flange, allowing for easy connection to pipes and other components. The reduction on one side enables for long-distance connections of various sizes, hence the name. When connected, they prevent gas or liquid leaks at high-pressure places along a pipeline system. These adaptable components are widely used in mechanical, industrial, chemical, plumbing, and wastewater-related applications.
| Oil and Gas Processing | Dairy and Food Processing |
| Desalination | Pesticides |
| Pulp and Paper | Sugar Factory |
| Energy industries | Power Plants |
| Ship Building | Fertilizers |
| Machine Building | Nuclear |
| Pharmaceuticals | Chemicals |
| Textile Machinery | Synthetic Fibers |
| Construction | Modern Architecture |
| Refinery & Petrochemicals | Water treatment facilities |
Every Standards have clearly requirements for steel flanges’ marking style, usually the marking words include seller’s Logo, buyer’s Logo (OEM), standard number, flange’s type, flange’s pressure, flange’s size, flange’s material, place of origin, heat number and other words for convenient to trace. If the flanges repaired by welding, it must mark on flanges showing this flange repared by welding. If the flange’s dimensions (OD, ID, PCD, Thickness, Holes number, Holes diameter, Tolerance etc) are different with the normal standard, it also must mark on flanges where it is different with normal ones. Another important place is heat number marking, it is the tracing base for every piece flange, and from the heat number we can trace to the beginning of raw material import.
Carbon Steel Reducing Flange and Stainless Steel Socket Weld Flanges are delivered with or without surface protection, as determined by the manufacturer.
The company delivers Reducing Flange in standard packaging, without surface protection or end protectors (caps). Special packaging, protective covers, and end protectors (caps) can be agreed upon.