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Flanges

Rivulet Industries LLP. is a trusted Manufacturer and Exporter of high-quality Flanges, designed and manufactured to meet the most stringent industry standards. Headquartered in Mumbai, India, we specialize in producing precision-engineered flanges that ensure reliable connections in piping systems across diverse industrial applications.

Our extensive inventory includes Slip-On, Weld Neck, Blind, Socket Weld, Threaded, and Custom Flanges, available in various standards, sizes, pressure ratings, and face types to suit different industrial requirements. Whether you need ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, or EN Flanges, we provide solutions that comply with international quality specifications, ensuring superior performance and durability.

Manufactured using premium-grade materials, including Stainless Steel, Duplex Steel (2205, 2304, 329), Super Duplex Steel (2507/F53, 2507/F55, 255), Nickel Alloys (400, K500, 625, 718, 825, 20, C276), and Exotic Alloys (A286, X750, 218, 254, 904L, XM-19), our flanges are designed for high corrosion resistance, pressure tolerance, and mechanical strength. Each flange undergoes rigorous quality control and non-destructive testing (NDT) to ensure precision, reliability, and long-term performance.

Engineered for critical applications, our flanges are widely used in industries such as Oil & Gas, Petrochemicals, Power Plants, Shipbuilding, Construction, Chemical Processing, Water Treatment, and Heavy Engineering. Whether for high-pressure, high-temperature, or corrosive environments, our flanges provide secure, leak-proof, and high-integrity connections.

At Rivulet Industries LLP., we offer customization options in terms of dimensions, pressure classes (150# to 2500#, PN6 to PN64), face types (Flat Face, Raised Face, Ring Type Joint), and materials to meet specific project requirements. Our commitment to quality, precision, and innovation ensures that our flanges contribute to enhanced efficiency, reduced downtime, and long-term operational reliability in industrial applications worldwide.

Available Grades of Flanges

Alloy Type Available Grades
Duplex Steel Alloy-2205, Alloy-2304, Alloy-329
Super Duplex Steel Alloy-2507 / F53, Alloy-2507 / F55, Alloy-255
Nickel Alloys Alloy-400, Alloy-K500, Alloy-625, Alloy-718, Alloy-825, Alloy-20, Alloy-C276
Exotic Alloys Alloy-A286, Alloy-X750, Alloy-218, Alloy-254, SS-904L, XM-19

Dimensional Standards of Flanges

Flange Type Size Range Pressure Class Face Type Standards Dimensions
Slip-On Flange 1/2" (15 NB) to 48" (1200 NB) 150# to 2500#, PN6 to PN64 FF, RF ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5, B16.47, BS4504, DIN, EN-1092
Welding Neck Flange 1/2" (15 NB) to 48" (1200 NB) 150# to 2500#, PN6 to PN64 RF, RTJ ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5, B16.47, BS4504, DIN, EN-1092
Blind Flange 1/2" (15 NB) to 48" (1200 NB) 150# to 2500#, PN6 to PN64 FF, RF, RTJ ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5, B16.47, BS4504, DIN, EN-1092
Socket Weld Flange 1/2" (15 NB) to 24" (600 NB) 150# to 2500#, PN6 to PN64 RF ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5
Threaded Flange 1/2" (15 NB) to 24" (600 NB) 150# to 600# RF ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5
Long Weld Neck Flange 1/2" (15 NB) to 24" (600 NB) 150# to 2500# RF, RTJ ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5
Ring Type Joint Flange 1/2" (15 NB) to 48" (1200 NB) 300# to 2500# RTJ ANSI, ASME, BS, DIN, EN ANSI/ASME B16.5, B16.47
Spectacle Blind Flange 1/2" (15 NB) to 48" (1200 NB) 150# to 2500# RF, RTJ ANSI, ASME, BS, DIN, EN ANSI/ASME B16.48

Types of Flanges

Slip-On Flange

Slip-On Flanges are widely used for low-pressure applications and provide an easy, cost-effective solution for pipe connections. These flanges are designed to slip over the pipe before being welded in place, ensuring secure and leak-proof connections. They are available in various materials and pressure ratings, making them suitable for industries such as oil & gas, petrochemicals, water treatment, power plants, and general piping systems.

Slip-On Flange
Key Features:
  • Designed to slip over the pipe and welded for a secure, leak-proof connection.
  • Available in various materials, including stainless steel, carbon steel, alloy steel, and exotic alloys.
  • Suitable for low to moderate pressure applications.
  • Available in different pressure ratings, including 150#, 300#, 600#, and higher as per industry requirements.
  • Widely used in industries such as oil & gas, petrochemicals, water treatment, power plants, and general piping systems.


Welding Neck Flange

Welding Neck Flanges are designed for high-pressure and high-temperature applications, offering superior strength and durability. These flanges have a long tapered hub that provides excellent reinforcement to the piping system, reducing stress concentrations at the flange connections. They are commonly used in critical industries such as oil & gas, petrochemicals, power plants, and shipbuilding, where reliability and leak-proof performance are essential.

Welding Neck Flange
Key Features:
  • Designed with a long tapered hub that provides reinforcement and reduces stress concentration.
  • Ideal for high-pressure and high-temperature applications.
  • Available in various materials, including stainless steel, carbon steel, alloy steel, and nickel alloys.
  • Manufactured in different pressure ratings, including 150#, 300#, 600#, 900#, 1500#, and 2500#.
  • Commonly used in industries such as oil & gas, petrochemicals, power plants, shipbuilding, and process industries.


Blind Flange

Blind Flanges are solid disk-shaped flanges designed to close the end of a piping system or pressure vessel openings. These flanges provide a reliable solution for isolating a pipeline, facilitating maintenance, and pressure testing. With no center bore, Blind Flanges ensure zero leakage, making them ideal for high-pressure and high-temperature applications across industries such as oil & gas, petrochemicals, power plants, and water treatment.

Blind Flange
Key Features:
  • Solid, flat-faced flange designed to close the end of pipelines and pressure vessels.
  • Provides a secure and leak-proof seal, preventing flow and allowing for system maintenance.
  • Available in various materials, including stainless steel, carbon steel, alloy steel, and nickel alloys.
  • Manufactured in multiple pressure ratings, including 150#, 300#, 600#, 900#, 1500#, and 2500#.
  • Commonly used in industries such as oil & gas, petrochemicals, power plants, water treatment, and chemical processing.


Socket Weld Flange

Socket Weld Flanges are designed for small-diameter, high-pressure piping systems, ensuring strong and durable connections. These flanges feature a socket-like bore where the pipe is inserted before being welded, providing excellent strength and fatigue resistance. Socket Weld Flanges are commonly used in industries such as oil & gas, petrochemicals, power plants, and chemical processing, where high-performance sealing and structural integrity are essential.

Socket Weld Flange
Key Features:
  • Features a socket-like bore where the pipe is inserted before being welded for a strong connection.
  • Provides excellent fatigue resistance, making it ideal for high-pressure applications.
  • Available in various materials, including stainless steel, carbon steel, alloy steel, and exotic alloys.
  • Manufactured in multiple pressure ratings, including 150#, 300#, 600#, 900#, 1500#, and 2500#.
  • Commonly used in oil & gas, petrochemical, power generation, and chemical processing industries.


Threaded Flange

Threaded Flanges, also known as screwed flanges, are designed for easy installation without the need for welding. These flanges have an internal thread that allows them to be screwed onto a matching pipe, making them ideal for low-pressure and non-critical applications. They are commonly used in industries such as plumbing, water supply, gas processing, and small-diameter piping systems where welding is impractical or not permitted.

Threaded Flange
Key Features:
  • Features an internally threaded bore that allows for easy installation without welding.
  • Ideal for low-pressure and non-critical applications where welding is impractical.
  • Available in various materials, including stainless steel, carbon steel, alloy steel, and brass.
  • Manufactured in standard pressure ratings such as 150#, 300#, 600#, and higher as required.
  • Commonly used in plumbing, water supply, gas distribution, and chemical processing applications.


Long Weld Neck Flange

Long Weld Neck Flanges are specially designed for high-pressure and high-temperature applications, offering enhanced structural reinforcement. These flanges feature an extended neck that provides additional support to the piping system, reducing stress concentrations and improving durability. Long Weld Neck Flanges are commonly used in pressure vessels, heat exchangers, refineries, and chemical processing industries where strength and reliability are crucial.

Long Weld Neck Flange
Key Features:
  • Extended neck design provides superior reinforcement and reduces stress concentrations.
  • Ideal for high-pressure and high-temperature applications requiring robust connections.
  • Available in stainless steel, carbon steel, alloy steel, and special-grade materials.
  • Manufactured in pressure ratings such as 150#, 300#, 600#, 900#, 1500#, and 2500#.
  • Commonly used in pressure vessels, heat exchangers, refineries, and petrochemical industries.


Ring Type Joint Flange

Ring Type Joint (RTJ) Flanges are designed for high-pressure and high-temperature applications, ensuring a leak-proof and secure connection. These flanges feature a precision-machined groove where a metal ring gasket is seated, providing superior sealing performance. RTJ Flanges are commonly used in critical industries such as oil & gas, petrochemical, refineries, and offshore drilling, where extreme conditions demand reliable and durable connections.

Ring Type Joint Flange
Key Features:
  • Features a machined groove for a metal ring gasket, ensuring a high-integrity seal.
  • Designed for extreme high-pressure and high-temperature environments.
  • Available in materials such as stainless steel, carbon steel, alloy steel, and exotic alloys.
  • Manufactured in pressure ratings including 600#, 900#, 1500#, and 2500#.
  • Commonly used in oil & gas, refineries, petrochemicals, and offshore drilling applications.