ASTM A694 Flange
ASTM A694 Flange is a type of flange designed for high-strength and high-pressure piping systems, primarily made from carbon steel and alloy steel materials.
ASTM A694 High Pressure Carbon Steel Flange
SSM offers ASTM A694 flanges made of carbon steel and low alloy, specifically designed for high-pressure transmission services. These flanges withstand stress and loads under high pressure, exhibiting high strength and good impact toughness, which makes them suitable for harsh working environments. They primarily serve the oil, gas, and high-pressure pipeline systems but are also ideal for other industrial applications that require reliable high-pressure transmission.
SSM provides product parameters as shown in the following table:
| Types | WN/LWN/SO/SW/Blind/Lap Joint Flange … |
| Class | 150#-2500# / PN6-PN100 |
| Size | 1/2″-48″ / DN10-DN1000 |
| Sealing Surface | RF FF RTJ TF GF LF LM |
| Coating | Vanish, yellow paint, anti-rust oil, galvanizing etc |
| Standard | ASME B16.5 / ASME B16.47 / DIN / EN1092-1:2002 / BS 4504 BS 10 TableD/E … |
| Material | ASTM F42、F46、F52、F56、F60、F65、F70 |
Chemical Composition & Mechanical Properties
The different grades of flanges are suited for various pressure and temperature conditions based on their mechanical properties and chemical composition.
Chemical Composition (Weight Percentage)
| Grade | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Copper (Cu) | Vanadium (V) |
| Max | 0.30 | 1.60 | 0.025 | 0.025 | 0.45 | 0.50 | 0.30 | 0.12 | 0.40 | 0.08 |
Mechanical Properties
| Grade | Minimum Yield Strength (MPa) | Minimum Tensile Strength (MPa) | Elongation (%) | Impact Energy (J) |
| F42 | 290 | 415 | 20 | 27 |
| F46 | 320 | 450 | 20 | 27 |
| F52 | 360 | 460 | 20 | 27 |
| F56 | 390 | 490 | 20 | 27 |
| F60 | 415 | 520 | 20 | 27 |
| F65 | 450 | 535 | 20 | 27 |
| F70 | 485 | 565 | 20 | 27 |
Advantages and Disadvantages of ASTM A694
Advantages: Flanges with the ASTM ASTM694 designation offer high yield and tensile strength, making them suitable for high-pressure applications. They are also known for their good weldability and are widely used in industries such as oil, gas, chemicals, and power generation. To enhance their corrosion resistance, elements like chromium and molybdenum are commonly added to the F52, F56, F60, F65, and F70 grades of ASTM A694 flanges.
Disadvantages: These flanges tend to be more expensive compared to other types, such as carbon steel flanges. Despite their corrosion resistance, regular maintenance may be necessary to ensure their longevity and performance in highly corrosive environments.
Applications of ASTM A694 Flange
- Oil and Gas Industry
- Chemical Industry
- Power Generation
- Shipbuilding
- General Industry
- Water Treatment
- Construction and Engineering
- Marine Industry
- Automotive Industry
- Pulp and Paper Industry
What is The Difference Between ASTM A105, A350 and A694 Flange?
– ASTMA105 flanges are primarily used for standard and medium temperature applications that involve high pressure and temperature.
– ASTM A350 flanges are designed for low-temperature environments and possess high and low-temperature toughness.
– ASTM A694 flanges are suitable for high-pressure and high-temperature applications, exhibiting high strength and corrosion resistance. They are mainly utilized for the transportation of oil and natural gas.
Summary
ASTM A694 flanges are preferred for their high strength, durability, and versatility in high-pressure applications across various industries. However, it’s important to consider their high cost and weight during handling and installation. The complex manufacturing process might result in longer delivery times. In corrosive environments, regular maintenance is essential to ensure optimal performance. If you have any questions about purchasing or need technical support for ASTM A694 flanges, please feel free to get in touch with us.
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