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Alloy Steel A182 F11 Flanges are high-performance forged fittings designed for use in high-temperature and high-pressure applications. Manufactured from ASTM A182 F11 alloy steel, these flanges provide excellent resistance to corrosion, heat, and mechanical stress, making them ideal for industrial piping systems.
The A182 F11 material is a chromium-molybdenum alloy steel, offering superior strength and durability compared to carbon steel. The alloy typically contains chromium (0.5-1.25%), molybdenum (0.44-0.65%), carbon (0.05-0.15%), and other trace elements to enhance hardness and toughness.
Alloy Steel A182 F11 Flanges are available in various types, including weld neck flanges, slip-on flanges, socket weld flanges, blind flanges, threaded flanges, and lap joint flanges. Each type serves specific purposes in industrial piping, from easy assembly to pressure-tight connections.
These flanges are manufactured according to ASTM A182, ASME B16.5, and ANSI standards. They come in different pressure ratings (150, 300, 600, 900, 1500, and 2500 lbs) and sizes ranging from 1/2 inch to 48 inches, providing versatility for different piping systems.
Alloy Steel A182 F11 Flanges exhibit excellent mechanical properties, including high tensile strength, yield strength, and impact resistance. Typical tensile strength ranges from 550–750 MPa, while yield strength is approximately 250–450 MPa, ensuring reliable performance under heavy loads.
The chromium and molybdenum content provides outstanding resistance to oxidation and corrosion in high-temperature environments. This makes A182 F11 flanges suitable for applications in power plants, petrochemical industries, and refineries where high temperatures and pressures are common.
These flanges are widely used in the oil and gas sector, chemical plants, steam power plants, and industrial piping systems. They are ideal for handling high-pressure steam, water, oil, and other industrial fluids, ensuring safety and longevity in critical operations.
Alloy Steel A182 F11 Flanges are produced through advanced forging techniques followed by heat treatment. This process improves the microstructure, toughness, and dimensional accuracy of the flanges. Surface finishing and precision machining ensure proper fit and leak-proof connections.
Key advantages include high strength, durability, excellent heat and corrosion resistance, and compatibility with high-pressure systems. Their robust design reduces maintenance costs and enhances the safety of piping systems in industrial setups.
Specification Table
| Specification | Description |
|---|---|
| Standard | ASTM A182 / ASME SA182 |
| Material Grade | F11 |
| Type | Alloy Steel Forged Flanges |
| Size Range | 1/2" to 48" (DN 15 to DN 1200) |
| Pressure Rating | Class 150, 300, 400, 600, 900, 1500, 2500 |
| End Connections | Weld Neck, Slip-On, Socket Weld, Threaded, Blind, Lap Joint |
| Temperature Range | -29°C to 540°C (-20°F to 1004°F) |
| Application | Petrochemical, Oil & Gas, Power Plants, Pressure Vessels, Piping Systems |
| Inspection & Testing | Dimensional check, Hydrostatic test, PMI, UT, RT, MT |
Mechanical Properties (Typical)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Minimum) | 585 | MPa |
| Yield Strength (0.2% Offset Minimum) | 415 | MPa |
| Elongation (in 50mm) | 30 | % |
| Hardness (HB) | 197-241 | HB |
| Impact Toughness (Charpy V-Notch) | 27 | J at -29°C |
| Modulus of Elasticity | 200 | GPa |
| Approximate Density | 7.85 | g/cm³ |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM A182 / ASME SA182 | F11 |
| DIN (Germany) | 1.7380 / 13CrMo4-5 |
| EN (Europe) | 13CrMo4-5 |
| JIS (Japan) | SCM435H |
| BS (UK) | En19 / 817M40 |
| IS (India) | F11 / 15CrMo4 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Size (NPS) | Outer Diameter (OD) | Bolt Circle Diameter (BCD) | No. of Bolts | Bolt Size | Thickness (T) | Weight (Approx.) |
|---|---|---|---|---|---|---|
| 1/2" | 90 mm | 65 mm | 4 | M16 | 14 mm | 1.2 kg |
| 1" | 115 mm | 85 mm | 4 | M16 | 16 mm | 2.0 kg |
| 2" | 150 mm | 105 mm | 4 | M16 | 18 mm | 3.5 kg |
| 4" | 230 mm | 170 mm | 8 | M16 | 20 mm | 7.5 kg |
| 6" | 285 mm | 220 mm | 8 | M20 | 22 mm | 14 kg |
| 8" | 360 mm | 285 mm | 8 | M20 | 24 mm | 22 kg |
| 10" | 445 mm | 350 mm | 12 | M22 | 26 mm | 35 kg |
| 12" | 520 mm | 405 mm | 12 | M22 | 28 mm | 48 kg |
Common Types Of Flangess
Ring Flanges
Type of Flanges
General Flanges
Stainless Steel Pipe Flanges
ASME B16.5 Flanges
Stainless Steel Flanges
Frequently Asked Questions (FAQ)
What is Alloy Steel A182 F11 Flange?
Alloy Steel A182 F11 Flanges are forged flanges made from F11 grade alloy steel, suitable for high-temperature and high-pressure applications. They are widely used in industries like petrochemical, power plants, and oil & gas.
What types of A182 F11 Flanges are available?
Common types include Weld Neck, Slip-On, Socket Weld, Threaded, Blind, and Lap Joint flanges.
What are the standard sizes of A182 F11 Flanges?
The flanges are available in sizes ranging from 1/2" to 48" (DN 15 to DN 1200) with various pressure ratings from Class 150 to Class 2500.
What are the mechanical properties of F11 Flanges?
Typical mechanical properties include a tensile strength of 585 MPa, yield strength of 415 MPa, elongation of 30%, and hardness between 197-241 HB.
What industries use Alloy Steel F11 Flanges?
They are widely used in petrochemical plants, refineries, power generation plants, pressure vessels, and industrial piping systems.
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