Flanges
At Nyne Overseas, we manufacture and supply a comprehensive range of industrial flanges that meet global quality standards. Our flanges are available in a wide variety of materials including Stainless Steel (ASTM A182 F304, F304L, F304H, F316, F316L, F317, F317L, F321, F310, F347, 904L), Duplex and Super Duplex Steel (UNS S31803, S32750, S32760), Nickel Alloys such as Hastelloy (ASTM B564 B2, C276, C22), Incoloy Alloys (Alloy 20, Alloy A286, 800H/HT, 825), Inconel Alloys (600, 601, 625, 718, 725), Monel Alloys (Monel 400, Monel K500), Carbon Steel (ASTM A105, A694 F42, A350 LF2), and Alloy Steel (ASTM A182 F1, F5, F9, F11, F22, F91).
We offer a full size range from ½" NB to 72" NB with pressure ratings of 150#, 300#, 600#, 900#, 1500# and 2500#. Our wide selection of flange types includes Slip-On Flanges, Threaded Flanges, Lap Joint Flanges, Socket Weld Flanges, Weld Neck Flanges, Blind Flanges (Dummy Flanges), Orifice Flanges, RTJ Flanges (Ring Type Joint), Long Weld Neck Flanges, and Table Flanges (Table D, E, F, H).
Known for their precise engineering, high strength, and corrosion resistance, our flanges are widely used in critical industries like Oil & Gas, Petrochemicals, Power Generation, Shipbuilding, and Water Treatment. We ensure every flange is manufactured with strict quality control and accompanied by required test certificates and third-party inspections on request.
Specification of Flanges| Flanges – Specifications | |
|---|---|
| Product Name | Industrial Pipe Flanges |
| Size Range | 1/2" NB to 72" NB |
| Pressure Rating | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Available Materials |
|
| Material Grades |
Stainless Steel: ASTM A182 F304, F304L, F304H, F316, F316L, F317, F317L, F321, F310, F347,
904L Duplex / Super Duplex: UNS S31803, S32750, S32760 Hastelloy: ASTM B564 B2, C276, C22 Incoloy: Alloy 20, A286, 800H/HT, 825 Inconel: ASTM B564 Alloy 600, 601, 625, 718, 725 Monel: ASTM B564 Monel 400, K500 Carbon Steel: ASTM A105, A694 F42, A350 LF2 Alloy Steel: ASTM A182 F1, F5, F9, F11, F22, F91 Copper Alloys: Brass, Pure Copper, Cupro Nickel 90/10 (C70600), Cupro Nickel 70/30 (C71500) |
| Types | Slip-On Flange, Weld Neck Flange, Socket Weld Flange, Blind Flange (Dummy Flange), Threaded Flange, Lap Joint Flange, Orifice Flange, RTJ Flange (Ring Type Joint), Long Weld Neck Flange, Table Flanges (Table D, E, F, H) |
| Standards | ASME B16.5, ASME B16.47, BS 4504, DIN, EN 1092-1, ANSI |
| End Connections | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Applications | Oil & Gas, Petrochemicals, Refineries, Power Plants, Shipbuilding, Chemical Plants, Water Treatment Facilities, Nuclear Projects, Offshore Platforms, and Process Piping Systems. |
Dimensional Standards of Flanges
| Flange Type | Size (NPS) | Dimensions (mm) | Number of Bolts | Bolt Hole Diameter (mm) | Standard | |
|---|---|---|---|---|---|---|
| Outer Diameter (OD) | Bolt Circle Diameter (BCD) | |||||
| Weld Neck Flange | 1/2" - 72" | 90 - 1850 | 60 - 1750 | 4 - 40 | 15 - 68 | ASME B16.5 / B16.47 |
| Slip-On Flange | 1/2" - 72" | 90 - 1850 | 60 - 1750 | 4 - 40 | 15 - 68 | ASME B16.5 / B16.47 |
| Blind Flange | 1/2" - 72" | 90 - 1850 | 60 - 1750 | 4 - 40 | 15 - 68 | ASME B16.5 / B16.47 |
| Threaded Flange | 1/2" - 24" | 90 - 900 | 60 - 860 | 4 - 20 | 15 - 52 | ASME B16.5 |
| Socket Weld Flange | 1/2" - 4" | 90 - 210 | 60 - 165 | 4 - 8 | 15 - 22 | ASME B16.5 |
| Lap Joint Flange | 1/2" - 72" | 90 - 1850 | 60 - 1750 | 4 - 40 | 15 - 68 | ASME B16.5 / B16.47 |
| Orifice Flange | 1/2" - 24" | 90 - 800 | 60 - 765 | 4 - 20 | 15 - 45 | ASME B16.36 |
| RTJ Flange (Ring Type Joint) | 1/2" - 36" | 100 - 1250 | 75 - 1200 | 4 - 32 | 15 - 64 | ASME B16.5 / B16.47 |
| Long Weld Neck Flange | 1/2" - 24" | 100 - 850 | 70 - 800 | 4 - 20 | 15 - 52 | ASME B16.5 |
| Table Flange (D, E, F, H) | 1/2" - 36" | 95 - 920 | 65 - 880 | 4 - 24 | 14 - 50 | BS 10 / BS 4504 |
Types of Flanges
Weld Neck Flange (WNRF)
A Weld Neck Flange (WNRF) is designed with a long tapered hub that provides reinforcement, making it ideal for high-pressure and high-temperature applications. The smooth transition from the flange to the pipe ensures reduced stress concentration and better flow efficiency. These flanges are commonly used in industries such as oil & gas, chemical processing, and power plants.
Slip-On Flange (SORF)
A Slip-On Flange (SORF) is designed to slide over the pipe and then be welded on both the inside and outside for a secure connection. It is cost-effective, easy to install, and widely used in low-pressure applications where leakage prevention is not the primary concern. These flanges are commonly used in water supply systems, gas pipelines, and structural applications.
Threaded Flange (THRF)
A Threaded Flange (THRF) is designed with internal threads that allow it to be screwed onto a pipe without the need for welding. It is widely used in low-pressure applications and where welding is not feasible due to explosive or hazardous environments. These flanges are commonly used in small-diameter piping systems, fuel lines, and water distribution networks.
Socket Weld Flange (SWRF)
A Socket Weld Flange (SWRF) is designed for small-diameter, high-pressure piping systems. It features a socket in which the pipe is inserted and fillet-welded around the outside for secure attachment. These flanges are commonly used in chemical processing, high-pressure steam lines, and hydraulic systems due to their strong and leak-proof connection.
Lap Joint Flange (LJRF)
A Lap Joint Flange (LJRF) is a two-piece flange assembly consisting of a stub end and a backing flange. It is commonly used in systems requiring frequent dismantling for inspection and maintenance. These flanges allow easy alignment and rotation, making them ideal for low-pressure, non-critical applications such as water pipelines, chemical processing, and shipbuilding.
Blind Flange (BLRF)
A Blind Flange (BLRF) is a solid disk used to close the end of a piping system. It provides a positive seal for systems or vessels under high pressure. These flanges allow easy access to the pipeline for inspection, modification, or expansion without permanent welding. Commonly used in oil & gas, petrochemical, water treatment, and power generation industries.
Long Welding Neck Flange (LWNRF)
A Long Welding Neck Flange (LWNRF) is a specialized flange for high-pressure and high-temperature applications. Unlike standard neck flanges, the extended neck of LWNRF makes it ideal for use in pressure vessels and critical piping systems. It helps in reducing stress concentration and ensures a smooth transition of fluid flow. Widely used in oil & gas, power plants, marine, and petrochemical industries.
Orifice Flange
An Orifice Flange is designed specifically to measure fluid flow within pipelines. It features tapped holes to mount orifice plates and allows accurate flow rate measurement of liquids and gases. Used along with pressure taps to monitor differential pressure, these flanges are essential in industries requiring precise control like oil & gas, chemical processing, and power generation.
Spectacle Blind Flange
A Spectacle Blind Flange is a safety device used to completely isolate or partially restrict flow in a pipeline. It consists of a solid plate and an open ring (spacer) connected by a metal strip, allowing operators to switch between open and closed positions without removing the flange. These flanges are commonly used in high-pressure systems for maintenance, inspection, and emergency shutdowns in industries such as oil & gas, petrochemical, and power plants.
Ring Joint Flange (RTJ Flange)
A Ring Joint Flange (RTJ Flange) is designed for high-pressure and high-temperature applications, ensuring a leak-proof metal-to-metal seal. It features a precision-machined groove in the flange face where a metal ring gasket is inserted to create a tight seal when bolted together. This type of flange is commonly used in critical industries such as oil & gas, petrochemical, and power plants where reliable sealing under extreme conditions is required.
