Stainless Steel 347 Flanges: High-Performance and Reliable Solutions by ASC LLP
In the world of industrial applications, choosing the right material for flanges is crucial to ensure durability, corrosion resistance, and high performance. Among the various options available, 347 stainless steel flanges stand out due to their unique properties and advantages. At ASC LLP, we specialize in providing top-quality stainless steel 347 flanges, engineered to meet the stringent demands of various industries.
What is 347 Stainless Steel Flanges?
347 stainless steel flanges are a type of industrial component used to connect pipes, valves, pumps, and other equipment within a piping system. These flanges are made from 347 stainless steel, a columbium-stabilized austenitic stainless steel known for its excellent resistance to intergranular corrosion. The addition of columbium (niobium) enhances the alloy’s ability to withstand high temperatures and prevents carbide precipitation during welding, making it an ideal choice for applications that involve continuous exposure to elevated temperatures.
347 Stainless Steel Flanges Properties
The properties of 347 stainless steel flanges make them suitable for a wide range of industrial applications. Below are some of the key properties:
- Corrosion Resistance: 347 stainless steel flanges offer excellent resistance to corrosion, particularly against intergranular corrosion. This makes them ideal for applications where the material is exposed to harsh environments or corrosive substances.
- High-Temperature Resistance: The columbium stabilization in 347 SS flanges allows them to maintain their strength and corrosion resistance even at elevated temperatures. They can withstand continuous service at temperatures up to 1500°F (816°C).
- Weldability: 347 stainless steel flanges exhibit good weldability, making them easy to fabricate and install in various piping systems. The alloy is less prone to sensitization, reducing the risk of weld decay.
- Mechanical Strength: These flanges possess high mechanical strength, making them capable of withstanding high pressures and stress in demanding applications.
- Oxidation Resistance: 347 stainless steel flanges have excellent oxidation resistance, preventing the formation of scales on the surface at high temperatures, which is crucial in applications involving thermal cycling.
347 Stainless Steel Flanges Advantages
When it comes to choosing the right flange material, 347 grade stainless steel flanges offer several advantages that make them a preferred choice in various industries:
- Long-Lasting Performance: Due to their exceptional corrosion resistance and high-temperature capabilities, 347 stainless steel flanges provide long-lasting performance even in harsh environments, reducing the need for frequent replacements.
- Versatility: These flanges are versatile and can be used in a wide range of applications, including chemical processing, petrochemical, power generation, and aerospace industries.
- Cost-Effective: Although 347 SS flanges may have a higher initial cost compared to some other materials, their durability and low maintenance requirements make them a cost-effective solution in the long run.
- Reliable in High-Temperature Applications: The ability of 347 SS flanges to maintain their properties at elevated temperatures makes them reliable in high-temperature applications, such as heat exchangers, boilers, and furnace components.
- Resistance to Carbide Precipitation: The columbium stabilization in 347 stainless steel prevents carbide precipitation, which can lead to intergranular corrosion. This makes these flanges ideal for applications involving welding or prolonged exposure to high temperatures.
Schedule and Size Chart
| Nominal Pipe Size (NPS) | Outside Diameter (OD) (inches) | Flange Thickness (inches) | Bolt Circle Diameter (inches) | Number of Bolts | Bolt Diameter (inches) | Weight (lbs) |
| 1/2″ | 3.50 | 0.88 | 2.38 | 4 | 0.50 | 3.0 |
| 1″ | 4.25 | 0.94 | 2.75 | 4 | 0.50 | 4.0 |
| 2″ | 6.00 | 1.00 | 5.00 | 4 | 0.63 | 7.5 |
| 4″ | 9.00 | 1.19 | 7.88 | 8 | 0.63 | 18.0 |
| 6″ | 11.00 | 1.31 | 9.75 | 8 | 0.75 | 28.0 |
| 8″ | 13.50 | 1.50 | 11.75 | 8 | 0.75 | 43.0 |
| 10″ | 16.00 | 1.62 | 14.25 | 12 | 0.88 | 61.0 |
| 12″ | 19.00 | 1.75 | 17.00 | 12 | 0.88 | 90.0 |
| 14″ | 21.00 | 1.88 | 18.75 | 12 | 1.00 | 113.0 |
| 16″ | 23.50 | 2.00 | 21.25 | 16 | 1.00 | 155.0 |
Mechanical Properties Chart
| Property | Value |
| Tensile Strength (MPa) | 515 (min) |
| Yield Strength 0.2% Proof (MPa) | 205 (min) |
| Elongation (% in 2 inches) | 35 (min) |
| Hardness (Brinell) | 217 (max) |
| Hardness (Rockwell B) | 95 (max) |
| Modulus of Elasticity (GPa) | 193-200 |
| Poisson’s Ratio | 0.27-0.30 |
| Melting Point (°C) | 1398-1446 |
Specifications Chart
| Standard | Specification |
| ASTM/ASME | A182 / SA182 |
| DIN | 1.4550 |
| BS | 347S31 |
| EN | X6CrNiNb18-10 |
| UNS | S34700 |
| JIS | SUS 347 |
| SAE | 30347 |
Chemical Composition Chart
| Element | Composition (%) |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 13.00 |
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 0.75 max |
| Columbium (Nb) | 10 x (C+N) – 1.00 max |
Physical Properties Chart
| Property | Value |
| Density (g/cm³) | 7.98 |
| Thermal Conductivity (W/m·K) | 16.3 @ 100°C |
| Electrical Resistivity (µΩ·cm) | 72 @ 20°C |
| Specific Heat Capacity (J/kg·K) | 500 @ 0-100°C |
| Coefficient of Thermal Expansion (µm/m°C) | 16.6 @ 0-100°C |
| Magnetic Permeability (µ) | 1.02 (approx.) |
Application Chart
| Industry | Application |
| Chemical Processing | Heat exchangers, process piping, reactors, and vessels |
| Petrochemical | Refinery equipment, catalytic recovery systems |
| Power Generation | Boiler components, superheater tubes, reheater tubes |
| Aerospace | Turbine engines, exhaust systems, afterburners |
| Food Processing | Equipment exposed to food acids, dairy equipment |
| Pharmaceutical | Sterile piping systems, pharmaceutical reactors |
| Oil & Gas | Offshore platforms, drilling rigs, and oil processing units |
| Pulp & Paper | Digesters, bleach towers, and recovery boilers |
Benefits of choosing ASC LLP for 347 Stainless Steel Flanges?
At ASC LLP, we are committed to providing our clients with the highest quality 347 SS flanges. Our flanges are manufactured to meet international standards and are available in various sizes, types, and specifications to suit your specific requirements. Here’s why you should choose us:
- Quality Assurance: We adhere to stringent quality control measures to ensure that our products meet the highest standards of performance and reliability.
- Extensive Inventory: We maintain an extensive inventory of SS 347 flanges, ensuring quick and efficient delivery to our clients.
- Customized Solutions: We offer customized solutions to meet the unique needs of our clients. Whether you need a specific size, type, or material grade, we can provide the perfect solution.
- Competitive Pricing: We offer competitive pricing without compromising on quality. Our goal is to provide cost-effective solutions that deliver value to our clients.
- Expertise and Experience: With years of experience in the industry, our team of experts can provide you with the guidance and support you need to choose the right flanges for your application.
347 stainless steel flanges are an excellent choice for applications that require high-temperature stability, corrosion resistance, and mechanical strength. At ASC LLP, we are proud to offer a wide range of 347 SS flanges that meet the highest standards of quality and performance. Whether you are in the chemical, petrochemical, power generation, aerospace, or any other industry, our 347 stainless steel flanges are designed to meet your specific needs. Contact us today to learn more about our products and how we can help you achieve your project goals.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Stainless Steel 347 Flanges. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
