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Alloy Steel A182 F12 Flanges are high-performance forged fittings designed for use in high-temperature and high-pressure applications. Manufactured from ASTM A182 F12 alloy steel, these flanges provide excellent resistance to corrosion, heat, and mechanical stress, making them ideal for industrial piping systems.
The A182 F12 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 F12 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 F12 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 F12 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 F12 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 | Details |
|---|---|
| Standard | ASTM A182 / ASME SA182 |
| Grade | F12 |
| Material | Alloy Steel |
| Type | Weld Neck, Slip-On, Blind, Socket Weld, Lap Joint, Threaded |
| Size Range | 1/2" to 72" (DN 15 to DN 1800) |
| Pressure Rating | Class 150, 300, 400, 600, 900, 1500, 2500 |
| End Connection | RF (Raised Face), RTJ (Ring Type Joint), FF (Flat Face) |
| Application | Petrochemical, Oil & Gas, Power Plant, Refinery, Chemical Industries |
| Manufacturing Process | Forged & Machined |
| Inspection & Test | Radiography Test, PMI Test, Hydrostatic Test, Ultrasonic Test, Visual Inspection |
Mechanical Properties (Typical)
| Property | Value | Unit |
|---|---|---|
| Yield Strength | 415 | MPa |
| Tensile Strength | 585 | MPa |
| Elongation (in 50 mm) | 20 | % |
| Hardness | 197–241 | HB |
| Impact Test (Charpy V-notch) | 27 | J at -20°C |
| Operating Temperature | -29 to 593 | °C |
| Corrosion Resistance | Good resistance to oxidizing environments | N/A |
| Hardness after Heat Treatment | ≤241 | HB |
| Modulus of Elasticity | 205 | GPa |
| Poisson's Ratio | 0.3 | N/A |
Equivalent Grades
| Standard | Equivalent Grade | Country / Organization |
|---|---|---|
| ASTM A182 | F12 | USA |
| EN 10222-2 | 13CrMo4-5 | Europe |
| DIN | 1.7335 | Germany |
| JIS | SCM422H | Japan |
| GB / China | 12Cr1MoV | China |
| IS / India | IS 2062 Gr F12 Equivalent | India |
| API | API 5L X52 / F12 Equivalent | International |
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) | Outside Diameter (OD) | Thickness / Raised Face (RF) | Bolt Circle Diameter (BCD) | No. of Bolts | Bolt Size | Weight (kg) |
|---|---|---|---|---|---|---|
| 1/2" | 60.3 mm | 12 mm | 95 mm | 4 | M16 | 1.5 |
| 1" | 88.9 mm | 14 mm | 115 mm | 4 | M16 | 2.5 |
| 2" | 114.3 mm | 16 mm | 150 mm | 4 | M16 | 4.0 |
| 4" | 190.5 mm | 20 mm | 250 mm | 8 | M20 | 10.5 |
| 6" | 241.3 mm | 22 mm | 280 mm | 8 | M20 | 15.0 |
| 8" | 298.5 mm | 24 mm | 350 mm | 8 | M22 | 23.0 |
| 10" | 362 mm | 26 mm | 405 mm | 12 | M22 | 32.0 |
| 12" | 406 mm | 28 mm | 470 mm | 12 | M24 | 45.0 |
| 16" | 483 mm | 32 mm | 600 mm | 16 | M27 | 80.0 |
| 24" | 635 mm | 38 mm | 760 mm | 20 | M30 | 150.0 |
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 F12 Flange?
Alloy Steel A182 F12 Flange is a high-strength flange made from alloy steel as per ASTM A182 F12 standard, suitable for high-temperature and high-pressure applications in petrochemical, oil, gas, and power industries.
What types of flanges are available in ASTM A182 F12?
Common types include Weld Neck, Slip-On, Blind, Socket Weld, Lap Joint, and Threaded flanges, each designed for specific applications and connection methods.
What are the pressure ratings for A182 F12 Flanges?
They are available in Class 150, 300, 400, 600, 900, 1500, and 2500, covering low to high-pressure applications.
What is the temperature range for Alloy Steel F12 Flanges?
These flanges are suitable for operating temperatures from -29°C up to 593°C, making them ideal for high-temperature industrial applications.
What are the international equivalent grades of ASTM A182 F12?
International equivalents include EN 10222-2 (13CrMo4-5), DIN (1.7335), JIS (SCM422H), GB 12Cr1MoV, IS 2062 Gr F12 Equivalent, and API 5L X52 / F12 Equivalent.
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