Flanges
Prevest Metalloys is a reputed Manufacturer and Exporter of premium-quality Flanges, headquartered in Mumbai, India. We specialize in delivering precision-engineered flanges crafted from top-grade raw materials and tested under stringent quality control processes to ensure maximum strength, reliability, and performance.
All our flanges are produced in full compliance with National and International Standards, making them ideal for critical applications across a wide range of industries. Our unwavering commitment to quality and consistency has earned us recognition as a dependable supplier in both domestic and global markets.
Prevest Metalloys offers a comprehensive selection of flanges in various types, grades, and sizes, manufactured using Stainless Steel, Carbon Steel, Alloy Steel, Duplex & Super Duplex Steel, Nickel Alloys, Titanium, and Cupro-Nickel. Every product undergoes rigorous inspection and non-destructive testing to ensure unmatched durability, corrosion resistance, and dimensional precision.
Engineered using modern production techniques and supported by a team of experienced professionals, our flanges meet strict industry norms and custom specifications. At Prevest Metalloys, we take pride in offering high-performance flanges that fulfill the demanding requirements of Oil & Gas, Petrochemical, Power, Marine, and Infrastructure sectors.
With a focus on technological advancement, timely delivery, and customer satisfaction, Prevest Metalloys continues to be a trusted name for superior-grade flanges worldwide.
Available Grades of Flanges
| Material Type | Standards | Available Grades | |
|---|---|---|---|
| ASTM | ASME | ||
| Stainless Steel | A182 | A240 | F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L |
| - | - | ||
| Carbon Steel | A105 | A350 | LF2, A516 Gr.70, A36, A694 F42, F46, F52, F60, F65, F70 |
| A181 | - | LF2 | |
| Alloy Steel | A182 | A387 | F1, F5, F9, F11, F12, F22, F91 |
| Duplex Steel | A182 | - | F44, F45, F51, F53, F55, F60, F61 |
| Super Duplex Steel | A182, A240 | - | F44, F45, F51, F53, F55, F60, F61 |
| Nickel Alloy | - | Nickel 200, Nickel 201, Monel 400, Monel 500, Inconel 800, Inconel 825, Inconel 600, Inconel 625, Inconel 601, Hastelloy C 276, Alloy 20, Titanium (Grade I & II) | |
| Copper Alloy | - | UNS No. C10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, C 70600 (Cu-Ni-90/10), C 71500 (Cu-Ni-70/30) | |
| Low Temperature Carbon Steel | A350 | - | LF2, LF3 |
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
Prevest Metalloys offers high-quality Slip-On Flanges ideal for low-pressure systems. These flanges are designed to easily slide over the pipe and are welded in place to ensure leak-tight joints. Known for their ease of installation and cost efficiency, Slip-On Flanges are widely used in industries like oil & gas, water treatment, and general engineering services.
- Slides over pipe ends and welded for a secure, tight seal.
- Available in stainless steel, carbon steel, alloy steel, and custom materials.
- Perfect for low-pressure and moderate temperature applications.
- Offered in pressure classes like 150#, 300#, 600#, and more.
- Used in oil & gas, water pipelines, chemical plants, and HVAC systems.
Welding Neck Flange
Prevest Metalloys’ Welding Neck Flanges are designed to handle extreme pressure and temperature environments. Featuring a long tapered neck, these flanges offer excellent structural support and reduce stress at the pipe joint. They are ideal for critical systems in oil refineries, power plants, and offshore drilling rigs.
- Tapered neck offers excellent reinforcement to pipe systems.
- Best suited for high-stress, high-temperature operations.
- Manufactured in SS, CS, alloy steels, and nickel alloys.
- Pressure ratings: 150#, 300#, 600#, 900#, 1500#, 2500#.
- Preferred in energy, petrochemical, and marine industries.
Blind Flange
Blind Flanges by Prevest Metalloys are used to terminate or isolate piping systems. With no bore, they provide a reliable seal for maintenance or testing. Suitable for high-pressure applications, these flanges are commonly seen in petrochemical plants, water systems, and power stations.
- Solid disk flange ideal for shutting off pipelines or vessels.
- Ensures full closure with no flow or leakage.
- Available in SS, CS, nickel alloys, and other industrial grades.
- Standard pressure ratings from 150# up to 2500#.
- Used across power, water treatment, oil & gas sectors.
Socket Weld Flange
Socket Weld Flanges from Prevest Metalloys are ideal for small-diameter piping in high-pressure systems. With a socket recess for precise pipe placement, these flanges offer high strength and resistance to fatigue. Commonly used in chemical plants, oil refineries, and power sectors.
- Socket allows precise fit and strong weld connection.
- Excellent fatigue and stress resistance in tight spaces.
- Options in stainless steel, alloy steel, and exotic grades.
- Pressure classes: 150#–2500# available on request.
- Used in chemical, oil & gas, and steam processing lines.
Threaded Flange
Prevest Metalloys offers Threaded Flanges for non-weld applications where quick installation is critical. These flanges feature internal threads that match with external pipe threads, making them ideal for small pipe sizes in low-pressure conditions like water, gas, and plumbing networks.
- Screwed design for easy installation without welding.
- Best suited for small bore pipes in low-pressure lines.
- Offered in carbon steel, SS, brass, and specialty alloys.
- Pressure classes: 150#, 300#, 600#, and more on request.
- Ideal for plumbing, compressed air lines, and fire protection systems.
Long Weld Neck Flange
Long Weld Neck Flanges from Prevest Metalloys provide additional neck length for better reinforcement in high-pressure applications. Designed for use in process piping and high-stress equipment connections, these flanges enhance structural strength and reduce risk of failure in critical operations.
- Extended neck design strengthens joint integrity.
- Recommended for heat exchangers, reactors, and pressure vessels.
- Available in stainless steel, carbon steel, and duplex grades.
- Supports pressure ratings up to 2500#.
- Widely used in refineries, fertilizer plants, and chemical units.
Ring Type Joint Flange
Prevest Metalloys supplies Ring Type Joint (RTJ) Flanges that are engineered for extreme sealing performance under high pressure. These flanges are equipped with a precisely machined groove and a metal ring gasket that offers superior sealing in demanding conditions like offshore platforms and petrochemical refineries.
- Machined groove holds ring gasket for robust sealing.
- Ideal for use in ultra-high-pressure, high-heat conditions.
- Available in high-performance alloys and steel grades.
- Pressure ratings: 150# to 2500# available.
- Trusted in refineries, drilling rigs, and subsea operations.
Applications of Flanges
At Prevest Metalloys, our industrial flanges play a vital role in ensuring robust and secure piping connections across a wide range of industries. Engineered for durability, performance, and leak-proof reliability, our flanges support critical operations in various sectors, including:
- Oil & Gas Industry: Used extensively in refineries, pipeline systems, and offshore rigs for safe and efficient fluid transmission.
- Petrochemical & Refineries: Withstands high temperatures and pressures in chemical processing and plant piping systems.
- Power Plants: Integral in steam lines, pressure vessels, and cooling systems in nuclear, thermal, and hydroelectric plants.
- Water Treatment Plants: Employed in desalination, purification, and sewage treatment systems for secure, corrosion-resistant connections.
- Pharmaceutical Industry: Ensures sterile, contamination-free connections in fluid transfer and processing equipment.
- Food & Beverage Industry: Preferred for their hygienic properties, stainless steel flanges are used in brewing, dairy, and food processing systems.
- Shipbuilding & Marine: Used in ballast systems, seawater pipelines, and marine engine rooms where corrosion resistance is critical.
- Construction & Infrastructure: Vital in water supply, drainage, HVAC, and fire protection systems across large-scale infrastructure projects.