High-strength Piping Solutions
Alloy steel flanges are mainly made up of chromium, molybdenum, and nickel composition along with other products.
High-strength Piping Solutions
Alloy steel flanges are mainly made up of chromium, molybdenum, and nickel composition along with other products.
Alloy Steel Flanges are designed from alloy steel, delivering high strength and temperature resistance for industrial piping. Compliant with ASME B16.5, they excel in extreme conditions. As of August 22, 2025, 02:39 AM PDT, they are industry leaders.
These Temperature-Resistant Flanges range from 1/2” to 48” in size, with pressure ratings up to 2500 PSI and temperature tolerance up to 550°C. They are ideal for power generation and petrochemical applications.
Alloy Steel Flanges undergo tensile, hardness, and creep resistance testing for quality. Coatings like 3LPE or galvanizing enhance durability, making them suitable for high-temperature and corrosive environments as of August 2025.
Compared to carbon steel, Alloy Steel Flanges offer superior heat resistance and strength, with a service life of 25–50 years with proper maintenance, balancing cost and performance.
Alloy Steel Flanges address challenges like high-temperature wear and corrosion in industrial piping, providing a durable solution as of August 22, 2025.
| Standard | Class / Table | Diameter (mm) | Bolt Circle Diameter (mm) | Number of Bolts | Bolt Size | Diameter of Bolt Hole (mm) |
|---|---|---|---|---|---|---|
| AS4087 Flanges | PN14 Flanges | 95 | 67 | 4 | M12 | 14 |
| AS 2129 Flange | Table C Flanges | 95 | 67 | 4 | 13 | 14 |
| Table D Flanges | 95 | 67 | 4 | 13 | 14 | |
| Table E Flanges | 95 | 67 | 4 | 13 | 14 | |
| Table F Flanges | 95 | 67 | 4 | 13 | 14 | |
| Table H Flanges | 114 | 83 | 4 | 16 | 17 | |
| Table J Flanges | 114 | 83 | 4 | 16 | 17 | |
| ANSI B16.5 Flanges | ANSI 150 Flanges | 89 | 60 | 4 | 13 | 16 |
| ANSI 300 Flanges | 95 | 67 | 4 | 13 | 16 | |
| ANSI 600 Flanges | 95 | 67 | 4 | 13 | 16 | |
| ANSI 900 Flanges | 121 | 83 | 4 | 19 | 22 | |
| ANSI 1500 Flanges | 121 | 83 | 4 | 19 | 22 | |
| ISO 7005 (DIN) Flange | PN6 Flange | 80 | 55 | 4 | M10 | 11 |
| PN10 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN16 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN20 Flange | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN40 Flanges | 95 | 65 | 4 | M12 | 14 |
| Grade | C (Carbon) |
Mn (Manganese) |
Si (Silicon) |
P (Phosphorus) |
S (Sulfur) |
Cr (Chromium) |
Mo (Molybdenum) |
|---|---|---|---|---|---|---|---|
| F1 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F5 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F9 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
| F11 | 0.05-0.15 | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 1.0-1.5 | 0.44-0.65 |
| F12 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F22 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
| F91 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
| Grade | Tensile Strength (MPa) |
Yield Strength (0.2% Offset, MPa) |
Elongation |
|---|---|---|---|
| F1 | 275 | 485 | 20 % |
| F5 | 275 | 485 | 20 % |
| F9 | 380 | 585 | 20 % |
| F11 | 205 | 415 | 20 % |
| F12 | 275 | 485 | 20 % |
| F22 | 205 | 415 | 20 % |
| F91 | 380 | 585 | 20 % |
The ANSI B16.5 Alloy Steel Slip On Flange can be slid on any pipe and welded in exact positions. They are the most popular and cost-effective flanges in the market. The High Alloy Steel Slip on Flange is made up of high qualities of alloyed material. These flanges contain at least 12% of chromium and are known for their hardenability. Low Alloy Steel Weld Neck Flange is designed with good mechanical properties. These flanges have a protruding hub, which provides support to pipes in high-pressure applications. The 4130 Chromoly Threaded Flange is used as companion flanges in piping systems. Our experienced workers make use of the latest technology and best raw materials whilst producing the ASME SA 182 AS Pipe Flange and our other products.
The Chromoly 4130 Reducing Flange is used to combine pipes of different shapes and sizes. They are designed with a bore having a specified diameter. Alloy Steel Socket Weld Flanges are used in higher-pressure systems having small pipes. They are fitted after applying a fillet weld. The Chrome AS Blind Flange is designed with a boring center. They are used in sealing the nozzles or openings in piping systems. They can be welded permanently or bolted as per requirement. The Alloy Steel Blind Flanges along with, our other products can be easily customized as per your needs in different shapes and sizes. Contact us to know more.
Customized Alloy Steel Flanges
Alloy steel flanges offer superior corrosion resistance and versatility, suitable for a wide range of industrial applications.
Alloy steel flanges, crafted from a blend of steel and other metals, are designed for corrosion resistance and durability. Available in various types, including weld neck, slip-on, threaded, deck, and lap joint flanges, they cater to diverse applications such as oil and gas pipelines, chemical processing, and power generation. These flanges are manufactured to precise specifications, with options for custom fabrication to meet unique project requirements.
Compliant with standards like ASME B16.5 and ASTM A182, alloy steel flanges undergo stringent quality checks, including material composition and pressure testing, to ensure performance in demanding environments. Certified by national authorities, they provide reliable connections for high-pressure systems, refineries, and industrial piping, offering enhanced strength and resistance to wear compared to standard steel flanges.
Alloy steel flanges deliver customizable, corrosion-resistant solutions for robust and reliable industrial piping systems.
There are six most commonly used flanges, also knows as ANSI Flange, ASME B16.5 Flange. However, these designs can be modified to meet the specific functions and requirements of the applications. Therefore, it’s essential to understand the pressure at the flagged joint, the required strength, and the size of pipes involved. With the correct information comes six types of flanges that an individual can choose from. These include:
Special Flanges
Additionally, the flanges can be modified to form other types, depending on application and functions.
These unique designs are made to incorporate specific needs and applications, like reducing flanges to answer to size and orifice flanges to incorporate orifice mounting.
Incoloy 825 Flange
Industries Using
The basic application of the Alloy Steel Flanges to connect pumps, pipes, valves, and other equipment, often using butt welds, to make a pipework system.
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Carbon steel flange and end flange connectors are ...