Robust Solutions For Heavy-duty Piping
The large diameter flanges are used to connect or to block off two very large diameters sized pipes.
Robust Solutions For Heavy-duty Piping
The large diameter flanges are used to connect or to block off two very large diameters sized pipes. a large diameter flange is a metal ring that is used to connect valves, pipes, pumps and other equipment that is necessary to form pipelines.
Large Diameter Flanges are robust steel flanges designed for heavy-duty piping systems, adhering to ASME B16.5 and other standards as of August 24, 2025, 11:40 PM PDT. These Heavy-Duty Piping Flanges ensure strength.
Available in sizes from 24” to 120” with pressure ratings up to Class 2500, Large Diameter Flanges support temperatures up to 650°C, depending on material, for large-scale applications.
Forged or machined with reinforced designs, these flanges offer exceptional durability, with coatings like 3LPE or galvanizing enhancing corrosion resistance as of August 2025. Reliability is paramount.
Compared to standard flanges, Large Diameter Flanges provide superior load-bearing capacity, with a service life of 20–40 years with proper maintenance and protective coatings.
Large Diameter Flanges address challenges like high-pressure and large-volume piping, delivering reliable high-capacity piping solutions as of August 24, 2025.
A Large Diameter flange is a metal ring that is used to connect valves, pipes, pumps and other equipment that is necessary to form pipelines. The Large Diameter flange also allows people to have easy inspection, rapid modification, and easy and quick access to clean the pipes.
Natural, Nickel Plated, Electro Polished Plated or any coating as per customer specification.
Any kind of special die casting sand gravity die lost wax shell moulding castings and cast parts casting produced to user specifications. We can be more competitive than Chinese castings and cast parts made in China Taiwan Asia Korea as traditional Indian expertise in Brass castings and Brass casting is superior and Indian Carbon Steel foundry / foundries are more competitive than other S.S. Carbon Steel foundries.
The most typical material used for making large diameter flanges is carbon steel that has been forged
carefully and which surfaces have been machined.
The flanges are made in multiple ways. Some have lips, while others do not. Nearly every type of flange has
a seal attached to it in order to preclude any type of leaks from the pipeline.
Large Diameter Flanges are corrosion resistant and have a wide variety of uses. We carry variety of threaded flanges, weld neck flanges and slip on flanges and of course we can can custom build Large Diameter Flanges to your specifications.
The A350 LF2 Line is often referred to as Carbon Steel Low Temp Fittings or Flanges
Large Diameter Flanges are an integral part of the pipeline system.
1 Simple to Fit
Simple installation in any weather and trench conditions,even underwater!
2 Long Life Expectancy
Elastomeric sealing gaskets are designed to have at least a 50 year lifespan
3 Corrosion Protection
Metal components are coated with Rilsan Nylon 11 which is WRAS approved for use with potable water. The nuts and bolts are Sheraplex coated to WIS 4-52-03, offering long term protection against corrosion, impact and abrasion to ensure continued reliable protection to corrosion, impact and abrasion and therefore ensures continued reliable performance.
Bolting two different flanges together with a gasket place between the two flanges in order to make a seal in the pipe joint creates flanged joints.
We carry a large inventory of Large Diameter Flanges in many types and sizes.
Check out the following information regarding Federal Large Diameter Flange products:
Large Industry Standard Flanges
Large industry standard flanges are vital connectors ensuring secure and efficient operations in industrial piping systems.
Large industry standard flanges are critical components designed to connect pipes, valves, pumps, and other equipment in industries like oil and gas, chemical processing, power generation, and water treatment. Due to their substantial size and scale, these flanges are typically made to order, allowing customization to meet specific application requirements. Available in types such as weld neck, slip-on, blind, and socket weld flanges, they are crafted from durable materials like carbon steel, stainless steel, or alloys for enhanced strength and corrosion resistance.
These industrial flanges connect pipes, valves, and other equipment, ensuring safe and effective operations in multiple areas, and are typically made to order per application given their size and scale.
Large industry standard flanges provide robust, standardized, and customizable solutions for secure industrial piping connections.
| Standard/Type | Material | Size Range | Pressure Rating | Key Advantage |
|---|---|---|---|---|
| Large Diameter Flanges | Carbon/Stainless Steel | 24”–120” | Up to Class 2500 | High Load-Bearing Capacity |
| ASME B16.5 | Forged Steel | 1/2”–24” | Class 150–2500 | Standardized Versatility |
| MSS SP-44 | Forged Steel | NPS 12–60 | Class 150–900 | Heavy-Duty for Large Pipes |
| Weld Neck Flange | Carbon Steel | 1/2”–48” | Class 150–2500 | Enhanced Weld Integrity |
Large Diameter Flanges excel in load-bearing, while ASME B16.5 offers versatility, MSS SP-44 suits large pipes, and Weld Neck Flanges enhance welding as of August 24, 2025.
Properly installed large diameter flanges are corrosion resistant and suitable for a wide variety of media applications.
They are easy to install in any climate, even underwater, thanks to their large sealing surface areas and simple design.
Equipped with elastomeric sealing gaskets, these flanges can achieve a life expectancy of at least 50 years.
Offer long-term protection against corrosion, abrasion, and impact, ensuring reliable performance in demanding conditions.
Strong and reliable flange connection for large-diameter pipelines
A large-diameter ring flange is designed to connect big-diameter pipes in critical industries such as oil & gas, chemical processing, and power generation. These flanges are ideal for high-pressure and high-temperature applications where a secure and leak-tight joint is essential.
Engineered to withstand high pressures and extreme temperatures in demanding environments.
Evenly distributes stress across the flange and piping system to prevent leaks and failures.
Ensures long-term safety and reliability in critical pipeline systems.
Due to their size, handling and transportation can be more complex compared to smaller flanges.
Requires lifting equipment and skilled labor, which may increase project costs.
Large-diameter ring flanges provide the strength and reliability required for critical infrastructure, making them indispensable in industries where safety and performance are non-negotiable.
The most common type, featuring a raised sealing surface that concentrates the bolting force on a smaller area.
Has a flat sealing surface, commonly used with cast iron flanges and for low-pressure applications.
Features a groove for metal ring gaskets (oval or octagonal), providing metal-to-metal sealing.
Features matching tongue and groove surfaces, providing self-alignment and confined gasket area.
Flange faces have to be smooth enough to ensure a tight, leak-free seal for bolted flanges.
| Flange Face Type | Flange Face Type | Flange Face Type |
|---|---|---|
| Type A: flat face | Type D: groove face | Type G: O Ring recess |
| Type B: raised face | Type E: spigot | Type H: O Ring groove |
| Type C: tongue face | Type F: recess |
| ASME B16.5 | Pipe Flanges NPS 1/2 - 24 |
| ASTM A105 | Forged Carbon Steel |
| ASTM A350 LF2 | Low-Temperature Service |
| ASTM A182 | High-Temperature Service |
| ASTM A694 | High-Pressure Transmission |
| DIN EN 1092-1 | European Standard PN 2.5-400 |
Most commonly used, forged with machined surfaces
Corrosion resistant, grades 304, 316, etc.
High-temperature and high-pressure applications
Cast iron, aluminum, brass, bronze, plastic
| Material Category | Fittings (ASTM Grade) | Flanges (ASTM Grade) | Valves (ASTM Grade) | Bolts & Nuts (ASTM Grade) |
|---|---|---|---|---|
| Carbon Steel | A234 Gr WPA | A105 | A216 Gr WCB | A193 Gr B7 A194 Gr 2H |
| A234 Gr WPB | A105 | A216 Gr WCB | ||
| A234 Gr WPC | A105 | A216 Gr WCB | ||
| Carbon Steel
Alloy (High-Temperature) |
A234 Gr WP1 | A182 Gr F1 | A217 Gr WC1 | A193 Gr B7 A194 Gr 2H |
| A234 Gr WP11 | A182 Gr F11 | A217 Gr WC6 | ||
| A234 Gr WP12 | A182 Gr F12 | A217 Gr WC6 | ||
| A234 Gr WP22 | A182 Gr F22 | A217 Gr WC9 | ||
| A234 Gr WP5 | A182 Gr F5 | A217 Gr C5 | ||
| A234 Gr WP9 | A182 Gr F9 | A217 Gr C12 | ||
| Carbon Steel
Alloy (Low-Temperature) |
A420 Gr WPL6 | A350 Gr LF2 | A352 Gr LCB | A320 Gr L7 A194 Gr 7 |
| A420 Gr WPL3 | A350 Gr LF3 | A352 Gr LC3 | ||
| Austenitic Stainless Steel | A403 Gr WP304 | A182 Gr F304 | A182 Gr F304 | A193 Gr B8 A194 Gr 8 |
| A403 Gr WP316 | A182 Gr F316 | A182 Gr F316 | ||
| A403 Gr WP321 | A182 Gr F321 | A182 Gr F321 | ||
| A403 Gr WP347 | A182 Gr F347 | A182 Gr F347 |
ASTM standards define the specific manufacturing process of the material and determine the exact chemical composition of pipes, fittings and flanges, through percentages of the permitted quantities of carbon, magnesium, nickel, etc., and are indicated by "Grade".
The usual materials of flanges include stainless steel, carbon steel, aluminum and plastic. The choice of the material largely depends on the purpose of the flange. For example, stainless steel is more durable and is necessary for heavy use. On the other hand, plastic is more feasible for use in the home because of its reasonable price and easy installation. The materials used for flanges are under the designation of the American Society of Mechanical Engineers.
The most common materials for pipe flanges (forged grades) are: ASTM A105 (carbon steel high temperature to match A53/A106/API 5L pipes), A350 Grades LF1/2/3 (carbon steel low temperature to match A333 pipes), A694 Grades F42 to F80 (high yield carbon steel to match API 5L pipe grades), ASTM A182 Grades F5 to F91 (alloy steel flanges to match A335 pipes), A182 Grade F304/316 (stainless steel flanges to match A312 SS pipes), A182 Gr. F44/F51/F53/F55 (duplex and super duplex to match A790/A928 pipes) and various nickel alloy grades (Inconel, Incoloy, Hastelloy, Monel).
The material qualities for these flanges are defined in the ASTM standards.
Metal flanges are classified from 150 to 2500 # rating for different pressure applications.
Incoloy 825 Flange
Industries Using
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