High Nickel Alloy Flanges are vital for creating secure, detachable joints between pipes, valves, and equipment in demanding industrial systems. These flanges provide robust mechanical strength combined with resistance to stress corrosion cracking, making them suitable for high-pressure and high-temperature applications. Their excellent surface finish and precise machining allow for tight sealing, minimizing leakage risk. Commonly forged or machined from solid billets, these flanges withstand harsh chemicals, marine atmospheres, and elevated thermal cycles, supporting reliable operation in oil & gas, petrochemical, and marine engineering sectors.
| Parameter | Details |
|---|---|
| Manufacturing Standards | ASTM B564 (Forgings), ASME B16.5 (Pipe Flanges), ASME B16.47 (Large Diameter Flanges), EN 1092-1, DIN, JIS, BS 4504, MSS SP-44, API 605, ISO 7005 |
| Material Grades | Inconel 600, 601, 625, 718 Incoloy 800, 800H, 800HT, 825 Hastelloy C-22, C-276, B-2, B-3 Monel 400, K500 Nickel 200, 201 Alloy 20, Alloy X, Alloy 59 |
| Flange Types | Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Threaded (TH), Lap Joint (LJ), Long Weld Neck (LWN), Orifice Flanges, Spectacle Blinds |
| Size Range | ½” to 48” (DN15 to DN1200) or custom sizes |
| Pressure Ratings | Class 150 to 2500 PN6 to PN400 (for EN/DIN standards) |
| Face Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove, Male-Female |
| Surface Finish | CNC Machined Finish (125–250 AARH), Serrated Finish, Spiral or Concentric Machined, Mirror Polished (on request) |
| Heat Treatment | Solution Annealed, Stress Relieved, Age Hardened (grade dependent) |
| Mechanical Properties | High tensile and yield strength, excellent fatigue and creep resistance, solution annealed condition for corrosion resistance |
| Dimensional Tolerances | As per ASME B16.5, B16.47, EN 1092-1, and other applicable standards |
| Testing & Certification | PMI, UT, RT (on request), Hydrostatic Testing (on assembly), IGC Test, Hardness Test EN 10204 3.1/3.2, NACE MR0175 / MR0103, PED, ISO, IBR |
| Typical Applications | Oil & Gas, Petrochemicals, Offshore Drilling, Power Generation, Seawater Systems, Desalination Plants, Heat Exchangers, Pulp & Paper, Acid Processing |
| Flange Type | Description | Applications |
|---|---|---|
| Weld Neck Flange | Features a long tapered neck that is welded directly to the pipe. | Used in high-pressure applications and harsh environments. |
| Slip-On Flange | Flange slides over the pipe and is welded on both sides. | Common in low-pressure applications and piping systems. |
| Socket Weld Flange | Flange with a socket for the pipe to be inserted and welded. | Used for small-bore, high-pressure applications. |
| Blind Flange | Seals the end of a pipe or valve. | Used to close pipes or vessels for maintenance. |
| Threaded Flange | Flange with internal threads that screw directly onto the pipe. | Ideal for low-pressure systems and where welding is not feasible. |
| Lap Joint Flange | Designed for easy disassembly, it fits over a stub end on the pipe. | Common in marine and low-pressure systems. |
| Orifice Flange | Contains a built-in orifice for flow measurement. | Used in flow metering applications, such as gas and liquid flow. |
| Ring-Type Joint Flange | Flange with grooves to hold metal ring gaskets. | Used in high-pressure, critical applications like petrochemical industries. |
| Expander Flange | Connects pipes of different diameters. | Used in systems requiring a change in pipe size. |
| Reducing Flange | Connects pipes of different diameters and reduces the pipe size. | For transitioning between different pipe sizes in pressurized systems. |
| Long Weld Neck Flange | A variation of the Weld Neck with an extended neck. | Typically used for higher-pressure, high-temperature applications. |
