+91 77009 58575
sales@nishraoverseas.com
+91 77009 58575
sales@nishraoverseas.com
Nishra Overseas LLP is a global manufacturer, supplier, and exporter of WNRF Flanges made from high-quality raw materials. Weld-Neck flanges or welding-neck flanges are distinguished from other types of flanges by their long tapered hub. These weld neck flanges, industrial weld neck flanges, and forged flanges are typically utilized for high-pressure, cold, or hot applications. Steel weld neck flanges are classified into two types: flat face flanges and raised face flanges. These WNRF Flanges are available in a variety of sizes, grades, specifications, and thicknesses to meet the needs of the clients.
The weld neck flange is a type of pipe fitting that connects two pipes. Weld neck flags are also known as WNRF flanges. When linked, the weld neck flanges form a tight seal. This type of pipe fitting is commonly employed in applications where high pressures or temperatures must be confined, such as an oil refinery.
WNRF Flanges are typically composed of carbon steel and have threaded fittings for simple installation and removal. Other features of WNRF Flanges include anti-rotation grooves, which help avoid twisting when installing or removing them from the pipes they connect.
Weld neck flanges are widely used in a variety of industries. Weld Neck Flanges are the most common form of flange used by plumbers and engineers.
We are a Stainless Steel WNRF Flange manufacturer in India, and we offer these Inconel Weld Neck Flange, Hastelloy Weld Neck Flange, Monel Weld Neck Flange, Alloy 20 Weld Neck Flange, Aluminium Weld Neck Flange, Nickel Weld Neck Flange, Duplex Weld Neck Flange, Super Duplex Weld Neck Flange, Incoloy Weld Neck Flange, Copper Weld Neck Flange, Copper Nickel Weld Neck Flange, Brass Weld Neck Flange, 254 Smo Weld Neck Flange, and Titanium Weld Neck 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 |
| T1 | Inside Diameter | Flange NPS | Outside Diameter | Raised Face (R) | Bolt Circle (BC) | Raised Face (RF) | H1 | Bolt Hole (B) | Raised Face Thickness (T) | H | Flat Face Thickness (T2) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| .38" | 0.62" | 1/2" | 3.50" | 1.38" | 2.38" | .063" | 0.84" | .62" | 1.88" | 1.19" | 1.82" | 4 |
| .44" | 0.82" | 3/4" | 3.88" | 1.69" | 2.75" | .063" | 1.05" | .62" | 2.06" | 1.50" | 2.00" | 4 |
| .50" | 1.05" | 1" | 4.25" | 2.00" | 3.12" | .063" | 1.32" | .62" | 2.19" | 1.94" | 2.13" | 4 |
| .56" | 1.38" | 1-1/4" | 4.62" | 2.50" | 3.50" | .063" | 1.66" | .62" | 2.25" | 2.31" | 2.19" | 4 |
| .62" | 1.61" | 1-1/2" | 5.00" | 2.88" | 3.88" | .063" | 1.90" | .62" | 2.44" | 2.56" | 2.38" | 4 |
| .69" | 2.07" | 2" | 6.00" | 3.62" | 4.75" | .063" | 2.38" | .75" | 2.50" | 3.06" | 2.44" | 4 |
| .82" | 2.47" | 2-1/2" | 7.00" | 4.12" | 5.50" | .063" | 2.88" | .75" | 2.75" | 3.56" | 2.69" | 4 |
| .88" | 3.07" | 3" | 7.50" | 5.00" | 6.00" | .063" | 3.50" | .75" | 2.75" | 4.25" | 2.69" | 4 |
| .88" | 3.55" | 3-1/2" | 8.50" | 5.50" | 7.00" | .063" | 4.00" | .75" | 2.81" | 4.81" | 2.75" | 8 |
| .88" | 4.03" | 4" | 9.00" | 6.19" | 7.50" | .063" | 4.50" | .75" | 3.00" | 5.31" | 2.94" | 8 |
| .88" | 5.05" | 5" | 10.00" | 7.31" | 8.50" | .063" | 5.56" | .88" | 3.50" | 6.44" | 3.44" | 8 |
| .94" | 6.07" | 6" | 11.00" | 8.50" | 9.50" | .063" | 6.63" | .88" | 3.50" | 7.56" | 3.44" | 8 |
| 1.06" | 7.98" | 8" | 13.50" | 10.62" | 11.75" | .063" | 8.63" | .88" | 4.00" | 9.69" | 3.94" | 8 |
| 1.13" | 10.02" | 10" | 16.00" | 12.75" | 14.25" | .063" | 10.75" | 1.00" | 4.00" | 12.00" | 3.94" | 12 |
| 1.19" | 12.00" | 12" | 19.00" | 15.00" | 17.00" | .063" | 12.75" | 1.00" | 4.50" | 14.38" | 4.44" | 12 |
| 1.32" | 13.25" | 14" | 21.00" | 16.25" | 18.75" | .063" | 14.00" | 1.12" | 5.00" | 15.75" | 4.94" | 12 |
| 1.38" | 15.25" | 16" | 23.50" | 18.50" | 21.25" | .063" | 16.00" | 1.12" | 5.00" | 18.00" | 4.94" | 16 |
| 1.50" | 17.25" | 18" | 25.00" | 21.00" | 22.75" | .063" | 18.00" | 1.25" | 5.50" | 19.88" | 5.44" | 16 |
| 1.63" | 19.25" | 20" | 27.50" | 23.00" | 25.00" | .063" | 20.00" | 1.25" | 5.69" | 22.00" | 5.63" | 20 |
| 1.75" | 21.25" | 22" | 29.50" | 25.25" | 27.25" | .063" | 22.00" | 1.38" | 5.88" | 24.25" | 5.82" | 20 |
| 1.82" | 23.25" | 24" | 32.00" | 27.25" | 29.50" | .063" | 24.00" | 1.38" | 6.00" | 26.12" | 5.94" | 20 |
| Inside Diameter | Bolt Circle (BC) | T1 | Raised Face (R) | No. of Bolt Holes | Raised Face (RF) | H | Outside Diameter | H1 | Raised Face Thickness (T) | Flat Face Thickness (T2) | Flange NPS | Bolt Hole (B) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.62" | 2.62" | .50" | 1.38" | 4 | .063" | 1.50" | 3.75" | 0.84" | 2.06" | 2.00" | 1/2" | 0.62" |
| 0.82" | 3.25" | .56" | 1.69" | 4 | .063" | 1.88" | 4.62" | 1.05" | 2.25" | 2.19" | 3/4" | 0.75" |
| 1.05" | 3.50" | .63" | 2.00" | 4 | .063" | 2.12" | 4.88" | 1.32" | 2.44" | 2.38" | 1" | 0.75" |
| 1.38" | 3.88" | .69" | 2.50" | 4 | .063" | 2.50" | 5.25" | 1.66" | 2.56" | 2.50" | 1-1/4" | 0.75" |
| 1.61" | 4.50" | .75" | 2.88" | 4 | .063" | 2.75" | 6.12" | 1.90" | 2.69" | 2.63" | 1-1/2" | 0.88" |
| 2.07" | 5.00" | .82" | 3.62" | 8 | .063" | 3.31" | 6.50" | 2.38" | 2.75" | 2.69" | 2" | 0.75" |
| 2.47" | 5.88" | .94" | 4.12" | 8 | .063" | 3.94" | 7.50" | 2.88" | 3.00" | 2.94" | 2-1/2" | 0.88" |
| 3.07" | 6.62" | 1.06" | 5.00" | 8 | .063" | 4.62" | 8.25" | 3.50" | 3.12" | 3.06" | 3" | 0.88" |
| 3.55" | 7.25" | 1.13" | 5.50" | 8 | .063" | 5.25" | 9.00" | 4.00" | 3.19" | 3.13" | 3-1/2" | 0.88" |
| 4.03" | 7.88" | 1.19" | 6.19" | 8 | .063" | 5.75" | 10.00" | 4.50" | 3.38" | 3.32" | 4" | 0.88" |
| 5.05" | 9.25" | 1.32" | 7.31" | 8 | .063" | 7.00" | 11.00" | 5.56" | 3.88" | 3.82" | 5" | 0.88" |
| 6.07" | 10.62" | 1.38" | 8.50" | 12 | .063" | 8.12" | 12.50" | 6.63" | 3.88" | 3.82" | 6" | 0.88" |
| 7.98" | 13.00" | 1.56" | 10.62" | 12 | .063" | 10.25" | 15.00" | 8.63" | 4.38" | 4.32" | 8" | 1.00" |
| 10.02" | 15.25" | 1.82" | 12.75" | 16 | .063" | 12.62" | 17.50" | 10.75" | 4.62" | 4.56" | 10" | 1.12" |
| 12.00" | 17.75" | 1.94" | 15.00" | 16 | .063" | 14.75" | 20.50" | 12.75" | 5.12" | 5.06" | 12" | 1.25" |
| 13.25" | 20.25" | 2.06" | 16.25" | 20 | .063" | 16.75" | 23.00" | 14.00" | 5.62" | 5.56" | 14" | 1.25" |
| 15.25" | 22.50" | 2.19" | 18.50" | 20 | .063" | 19.00" | 25.50" | 16.00" | 5.75" | 5.69" | 16" | 1.38" |
| 17.25" | 24.75" | 2.32" | 21.00" | 24 | .063" | 21.00" | 28.00" | 18.00" | 6.25" | 6.19" | 18" | 1.38" |
| 19.25" | 27.00" | 2.44" | 23.00" | 24 | .063" | 23.12" | 30.50" | 20.00" | 6.38" | 6.32" | 20" | 1.38" |
| 21.25" | 29.25" | 2.57" | 25.25" | 24 | .063" | 25.25" | 33.00" | 22.00" | 6.50" | 6.44" | 22" | 1.62" |
| 23.25" | 32.0" | 2.69" | 27.25" | 24 | .063" | 27.62" | 36.00" | 24.00" | 6.62" | 6.56" | 24" | 1.62" |
| Inside Diameter | Bolt Hole (B) | Flange NPS | Outside Diameter | Raised Face (R) | H | No. of Bolt Holes | Bolt Circle (BC) | H1 | Raised Face Thickness (T) | Raised Face (RF) | T1 | Flat Face Thickness (T2) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.55" | 0.62" | 1/2" | 3.75" | 1.38" | 1.50" | 4 | 2.62" | 0.84" | 2.31" | .250" | 0.56" | 2.06" |
| 0.74" | 0.75" | 3/4" | 4.62" | 1.69" | 1.88" | 4 | 3.25" | 1.05" | 2.50" | .250" | 0.62" | 2.25" |
| 0.96" | 0.75" | 1" | 4.88" | 2.00" | 2.12" | 4 | 3.50" | 1.32" | 2.69" | .250" | 0.69" | 2.44" |
| 1.28" | 0.75" | 1-1/4" | 5.25" | 2.50" | 2.50" | 4 | 3.88" | 1.66" | 2.87" | .250" | 0.81" | 2.62" |
| 1.50" | 0.88" | 1-1/2" | 6.12" | 2.88" | 2.75" | 4 | 4.50" | 1.90" | 3.00" | .250" | 0.88" | 2.75" |
| 1.94" | 0.75" | 2" | 6.50" | 3.62" | 3.31" | 8 | 5.00" | 2.38" | 3.13" | .250" | 1.00" | 2.88" |
| 2.32" | 0.88" | 2-1/2" | 7.50" | 4.12" | 3.94" | 8 | 5.88" | 2.88" | 3.37" | .250" | 1.12" | 3.12" |
| 2.90" | 0.88" | 3" | 8.25" | 5.00" | 4.62" | 8 | 6.62" | 3.50" | 3.50" | .250" | 1.25" | 3.25" |
| 3.36" | 1.00" | 3-1/2" | 9.00" | 5.50" | 5.25" | 8 | 7.25" | 4.00" | 3.63" | .250" | 1.38" | 3.38" |
| 3.83" | 1.00" | 4" | 10.75" | 6.19" | 6.00" | 8 | 8.50" | 4.50" | 4.25" | .250" | 1.5" | 4.00" |
| 4.81" | 1.12" | 5" | 13.00" | 7.31" | 7.44" | 8 | 10.50" | 5.56" | 4.75" | .250" | 1.75" | 4.50" |
| 5.76" | 1.12" | 6" | 14.00" | 8.50" | 8.75" | 12 | 11.50" | 6.63" | 4.87" | .250" | 1.88" | 4.62" |
| 7.63" | 1.25" | 8" | 16.50" | 10.62" | 10.75" | 12 | 13.75" | 8.63" | 5.50" | .250" | 2.19" | 5.25" |
| 9.75" | 1.38" | 10" | 20.00" | 12.75" | 13.5" | 16 | 17.00" | 10.75" | 6.25" | .250" | 2.50" | 6.00" |
| 11.75" | 1.38" | 12" | 22.00" | 15.00" | 15.75" | 20 | 19.25" | 12.75" | 6.37" | .250" | 2.62" | 6.12" |
| 13.00" | 1.50" | 14" | 23.75" | 16.25" | 17.00" | 20 | 20.75" | 14.00" | 6.75" | .250" | 2.75" | 6.50" |
| 15.00" | 1.62" | 16" | 27.00" | 18.50" | 19.50" | 20 | 23.75" | 16.00" | 7.25" | .250" | 3.00" | 7.00" |
| 17.00" | 1.75" | 18" | 29.25" | 21.00" | 21.50" | 20 | 25.75" | 18.00" | 7.50" | .250" | 3.25" | 7.25" |
| 19.00" | 1.75" | 20" | 32.00" | 23.00" | 24.00" | 24 | 28.50" | 20.00" | 7.75" | .250" | 3.50" | 7.50" |
| 21.00" | 1.75" | 22" | 34.25" | 25.25" | 26.25" | 24 | 30.63" | 22.00" | 8.00" | .250" | 3.75" | 7.75" |
| 23.00" | 2.00" | 24" | 37.00" | 27.25" | 28.25" | 24 | 33.00" | 24.00" | 8.25" | .250" | 4.00" | 8.00" |
| Raised Face (RF) | Flange NPS | Outside Diameter | No. of Bolt Holes | Bolt Circle (BC) | Raised Face (R) | H | Inside Diameter | H1 | Raised Face Thickness (T) | Flat Face Thickness (T2) | T1 | Bolt Hole (B) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| .250" | 3" | 9.50" | 8 | 7.50" | 5.00" | 5.00" | 2.90" | 3.50" | 4.25" | 4.00" | 1.50" | 1.00" |
| .250" | 4" | 11.50" | 8 | 9.25" | 6.19" | 6.25" | 3.83" | 4.50" | 4.75" | 4.50" | 1.75" | 1.25" |
| .250" | 5" | 13.75" | 8 | 11.00" | 7.31" | 7.50" | 4.81" | 5.56" | 5.25" | 5.00" | 3.00" | 1.38" |
| .250" | 6" | 15.00" | 12 | 12.50" | 8.50" | 9.25" | 5.76" | 6.63" | 5.75" | 5.50" | 2.19" | 1.25" |
| .250" | 8" | 18.50" | 12 | 15.50" | 10.63" | 11.75" | 7.63" | 8.63" | 6.63" | 6.38" | 2.50" | 1.50" |
| .250" | 10" | 21.50" | 16 | 18.50" | 12.75" | 14.50" | 9.75" | 10.75" | 7.50" | 7.25" | 2.75" | 1.50" |
| .250" | 12" | 24.00" | 20 | 21.00" | 15.00" | 16.50" | 11.75" | 12.75" | 8.13" | 7.88" | 3.13" | 1.50" |
| .250" | 14" | 25.25" | 20 | 22.00" | 16.25" | 17.75" | 13.00" | 14.00" | 8.63" | 8.38" | 3.38" | 1.63" |
| .250" | 16" | 27.75" | 20 | 24.25" | 18.50" | 20.00" | 15.00" | 16.00" | 8.75" | 8.50" | 3.50" | 1.75" |
| .250" | 18" | 31.00" | 20 | 27.00" | 21.00" | 22.25" | 17.00" | 18.00" | 9.25" | 9.00" | 4.00" | 2.00" |
| .250" | 20" | 33.75" | 20 | 29.50" | 23.00" | 24.50" | 19.00" | 20.00" | 10.00" | 9.75" | 4.25" | 2.13" |
| .250" | 24" | 41.00" | 20 | 35.50" | 27.25" | 29.50" | 23.00" | 24.00" | 11.75" | 11.50" | 5.50" | 2.63" |
| H1 | Inside Diameter | Outside Diameter | Raised Face (R) | Bolt Circle (BC) | Raised Face (RF) | Flange NPS | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | H | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.84" | 0.55" | 4.75" | 1.38" | 3.25" | .250" | 1/2" | 2.63" | 0.88" | 2.38" | 1.50" | 0.88" | 4 |
| 1.05" | 0.74" | 5.13" | 1.69" | 3.50" | .250" | 3/4" | 3.00" | 1.00" | 2.75" | 1.75" | 0.88" | 4 |
| 1.32" | 0.96" | 5.88" | 2.00" | 4.00" | .250" | 1" | 3.13" | 1.13" | 2.88" | 2.06" | 1.00" | 4 |
| 1.66" | 1.28" | 6.25" | 2.50" | 4.38" | .250" | 1-1/4" | 3.13" | 1.13" | 2.88" | 2.50" | 1.00" | 4 |
| 1.90" | 1.50" | 7.00" | 2.88" | 4.88" | .250" | 1-1/2" | 3.50" | 1.25" | 3.25" | 2.75" | 1.13" | 4 |
| 2.38" | 1.94" | 8.50" | 3.63" | 6.50" | .250" | 2" | 4.25" | 1.50" | 4.00" | 4.13" | 1.00" | 8 |
| 2.88" | 2.32" | 9.63" | 4.13" | 7.50" | .250" | 2-1/2" | 4.38" | 1.63" | 4.13" | 4.88" | 1.13" | 8 |
| 3.50" | 2.90" | 10.50" | 5.00" | 8.00" | .250" | 3" | 4.88" | 1.88" | 4.63" | 5.25" | 1.25" | 8 |
| 4.50" | 3.83" | 12.25" | 6.19" | 9.50" | .250" | 4" | 5.13" | 2.13" | 4.88" | 6.38" | 1.38" | 8 |
| 5.56" | 4.81" | 14.75" | 7.31" | 11.50" | .250" | 5" | 6.38" | 2.88" | 6.13" | 7.75" | 1.63" | 8 |
| 6.63" | 5.76" | 15.50" | 8.50" | 12.50" | .250" | 6" | 7.00" | 3.25" | 6.75" | 9.00" | 1.50" | 12 |
| 8.63" | 7.63" | 19.00" | 10.63" | 15.50" | .250" | 8" | 8.63" | 3.63" | 8.38" | 11.50" | 1.75" | 12 |
| 10.75" | 9.75" | 23.00" | 12.75" | 19.00" | .250" | 10" | 10.25" | 4.25" | 10.00" | 14.50" | 2.00" | 12 |
| 12.75" | 11.75" | 26.50" | 15.00" | 22.50" | .250" | 12" | 11.38" | 4.88" | 11.13" | 17.75" | 2.13" | 16 |
| 14.00" | 13.00" | 29.50" | 16.25" | 25.00" | .250" | 14" | 12.00" | 5.25" | 11.75" | 19.50" | 2.38" | 16 |
| 16.00" | 15.00" | 32.50" | 18.50" | 27.75" | .250" | 16" | 12.50" | 5.75" | 12.25" | 21.75" | 2.63" | 16 |
| 18.00" | 17.00" | 36.00" | 21.00" | 30.50" | .250" | 18" | 13.13" | 6.38" | 12.88" | 23.50" | 2.88" | 16 |
| 20.00" | 19.00" | 38.75" | 23.00" | 32.75" | .250" | 20" | 14.25" | 7.00" | 14.00" | 25.25" | 3.13" | 16 |
| 24.00" | 23.00" | 46.00" | 27.25" | 39.00" | .250" | 24" | 16.25" | 8.00" | 16.00" | 30.00" | 3.63" | 16 |
| Bolt Hole (B) | Inside Diameter | Flange NPS | Outside Diameter | Raised Face (RF) | Bolt Circle (BC) | H | Raised Face (R) | H1 | T1 | Raised Face Thickness (T) | Flat Face Thickness (T2) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.88" | 0.55" | 1/2" | 5.25" | .250" | 3.50" | 1.69" | 1.38" | 0.84" | 1.19" | 3.13" | 2.88" | 4 |
| 0.88" | 0.74" | 3/4" | 5.50" | .250" | 3.75" | 2.00" | 1.69" | 1.05" | 1.25" | 3.38" | 3.13" | 4 |
| 1.00" | 0.96" | 1" | 6.25" | .250" | 4.25" | 2.25" | 2.00" | 1.32" | 1.38" | 3.75" | 3.50" | 4 |
| 1.13" | 1.28" | 1-1/4" | 7.25" | .250" | 5.13" | 2.88" | 2.50" | 1.66" | 1.50" | 4.00" | 3.75" | 4 |
| 1.25" | 1.50" | 1-1/2" | 8.00" | .250" | 5.75" | 3.13" | 2.88" | 1.90" | 1.75" | 4.63" | 4.38" | 4 |
| 1.13" | 1.94" | 2" | 9.25" | .250" | 6.75" | 3.75" | 3.63" | 2.38" | 2.00" | 5.25" | 5.00" | 8 |
| 1.25" | 2.32" | 2-1/2" | 10.50" | .250" | 7.75" | 4.50" | 4.13" | 2.88" | 2.25" | 5.88" | 5.63" | 8 |
| 1.38" | 2.90" | 3" | 12.00" | .250" | 9.00" | 5.25" | 5.00" | 3.50" | 2.63" | 6.88" | 6.63" | 8 |
| 1.63" | 3.83" | 4" | 14.00" | .250" | 10.75" | 6.50" | 6.19" | 4.50" | 3.00" | 7.75" | 7.50" | 8 |
| 1.88" | 4.81" | 5" | 16.50" | .250" | 12.75" | 8.00" | 7.31" | 5.56" | 3.63" | 9.25" | 9.00" | 8 |
| 2.13" | 5.76" | 6" | 19.00" | .250" | 14.50" | 9.25" | 8.50" | 6.63" | 4.25" | 11.00" | 10.75" | 8 |
| 2.13" | 7.63" | 8" | 21.75" | .250" | 17.25" | 12.00" | 10.63" | 8.63" | 5.00" | 12.75" | 12.50" | 12 |
| 2.63" | 9.75" | 10" | 26.50" | .250" | 21.25" | 14.75" | 12.75" | 10.75" | 6.50" | 16.75" | 16.50" | 12 |
| 2.88" | 11.75" | 12" | 30.00" | .250" | 24.38" | 17.38" | 15.00" | 12.75" | 7.25" | 18.50" | 18.25" | 12 |
WNRF flanges are industrial pipe fittings that have an integrated raised face. Its aim is to offer additional strength and stiffness in order to exert greater pressure against the inside wall of a pressurized vessel or container, such as water tanks and storage silos. They are used for both high-pressure (up to 20,000 psi) and low-pressure (up to 150 psi).
A WNRF flange is a fitting that connects two sections of piping on the same level. When you gaze down into the entrance, it resembles an inverted "U". To function effectively, these fittings must meet industry-specified tightness and durability requirements. Weld neck flanges can be manufactured of stainless steel (cast or forged), carbon steel, or alloy steel.
After being measured with a gauge, the flange is inspected to ensure that all of its dimensions are within the size and shape specifications. Weld neck flanges acquire their name from the short, stubby tube that protrudes from them, known as a "neck."
When installing two sections of piping, the first step is to install a gasket on each side where they will meet. The flange then glides over the junction while it is still warm and soft from being heated in the welding machine or other manufacturing process. To generate enough force to form a secure seal, the neck is hammered into one of the two components.
The final step is to clean it up and apply some heat for finishing, while also ensuring that there are no sharp edges or projecting areas on the flange that could cause injury. Although these fittings have several advantages over other types, they are not suitable for all applications. They are more expensive than some other choices, thus they may only be employed when situations necessitate the creation or maintenance of a highly specialized seal.
| 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 WNRF Flanges and Stainless Steel Socket Weld Flanges are delivered with or without surface protection, as determined by the manufacturer.
The company delivers WNRF Flanges in standard packaging, without surface protection or end protectors (caps). Special packaging, protective covers, and end protectors (caps) can be agreed upon.
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