Stainless Steel 347 Flanges are high-performance piping components designed for elevated temperature and high-pressure environments. American Metallix Steel Co. manufactures precision-engineered SS 347 flanges that meet the demanding requirements of refineries, petrochemical plants, power generation facilities, and heavy industrial fabrication projects. These flanges play a critical role in connecting pipes, valves, pumps, and other equipment within complex piping systems.In industrial, mechanical, and structural engineering applications, Stainless Steel 347 Flanges are chosen for their stability under heat and resistance to intergranular corrosion. They are widely used in process piping, pressure vessels, heat exchangers, and boiler systems where strength, durability, and reliability are essential for long-term performance.
Stainless Steel 347 is a stabilized austenitic stainless steel alloy containing chromium, nickel, and columbium, also known as niobium. The addition of columbium stabilizes the material by preventing chromium carbide precipitation during welding and high-temperature service. This stabilization improves resistance to intergranular corrosion and makes Stainless Steel 347 Flanges suitable for applications involving prolonged exposure to temperatures between 800°F and 1500°F. The alloy typically contains around 17 to 19 percent chromium and 9 to 13 percent nickel, offering excellent oxidation resistance and mechanical strength. The austenitic structure provides high toughness, good ductility, and reliable performance in both low and elevated temperature conditions. Stainless Steel 347 Flanges maintain structural integrity under thermal cycling, making them ideal for power plants, exhaust systems, and high-temperature processing units. These flanges are available in various types including weld neck, slip-on, blind, socket weld, and threaded configurations. They are manufactured through forging and machining processes to ensure precise dimensions, smooth surface finish, and secure leak-proof connections in industrial piping systems.
Stainless Steel 347 Flanges offer outstanding resistance to intergranular corrosion, especially after welding. This makes them highly suitable for fabricated assemblies in chemical processing plants and high-temperature equipment. The stabilized composition ensures that the material retains corrosion resistance even after exposure to elevated temperatures. Strength and durability are key advantages. These flanges provide excellent tensile and yield strength, enabling them to handle high-pressure applications in oil and gas pipelines and power generation systems. Their resistance to scaling and oxidation ensures long service life with minimal maintenance. In terms of fabrication, Stainless Steel 347 Flanges are easy to machine and weld, reducing production time and overall installation costs. Their long-term cost efficiency comes from reduced downtime, lower repair frequency, and dependable performance in harsh industrial environments. For projects requiring reliable stainless steel piping components, SS 347 flanges provide a balanced combination of performance and value.
In high-temperature power generation systems, Stainless Steel 347 Flanges Manufacturers supply flanges used in boiler connections, superheaters, and steam lines. The material’s resistance to thermal fatigue and oxidation ensures safe and efficient operation in critical energy infrastructure. Within the petrochemical and refinery sector, Stainless Steel 347 Flanges Suppliers provide components for pipelines carrying corrosive fluids and gases. These flanges maintain tight sealing and structural integrity under continuous pressure and temperature variations.
For general industrial maintenance and fabrication projects, Stainless Steel 347 Flanges Stockists maintain ready inventory of standard and custom sizes for quick delivery. This supports efficient project timelines in manufacturing plants, chemical facilities, and structural engineering works. In global infrastructure and energy projects, Stainless Steel 347 Flanges Exporters deliver certified flanges that comply with international standards for offshore platforms, process industries, and high-pressure piping systems. Proper documentation, material traceability, and secure packaging ensure consistent quality across international markets.
Stainless Steel 347 Flanges are manufactured in accordance with ASTM A182 specifications for forged or rolled alloy and stainless steel pipe flanges and forged fittings for high-temperature service. The corresponding ASME standard is ASME SA182, which governs material requirements for pressure vessels, boilers, and piping systems. These standards define chemical composition, mechanical properties, heat treatment conditions, and testing procedures to ensure reliable performance in pressure equipment and high-temperature environments. Compliance with ASTM and ASME codes ensures that SS 347 flanges meet stringent quality and safety requirements in industrial applications.
Steel products such as flanges, bars, pipes, tubes, plates, sheets, and coils are named and classified according to international standards including ASTM, ASME, EN, DIN, JIS, and ISO. ASTM and ASME are widely recognized in North America and the Middle East for pressure equipment and industrial piping. EN and DIN standards govern European structural and mechanical materials, while JIS defines Japanese industrial specifications. ISO provides global guidelines for testing, quality assurance, and certification. Stainless steel grades such as 347 are identified based on alloy composition and stabilization elements, allowing engineers and procurement teams to select appropriate materials for fabrication, structural engineering, and chemical processing systems with confidence.
American Metallix Steel Co. is one of the leading manufacturers & suppliers of 347 Stainless Steel ANSI B16.5 Flange, SS 347H ASME B16.5 Class 150 Flanges, 347/347H SS 300# Flanges, 347/347H Stainless Steel 1500# Flanges, ASTM A182 F347 2500 Lbs Flanges, ASME SA 182 F347H BS10 Table E Flanges, DIN Flanges, JIS Flanges at the best price in India
Request Latest Price & Stock AvailabilityStainless Steel 347 Flanges are manufactured using forged, heat-treated, and machined processes. They are available in multiple pressure classes, dimensions, flange face types, and international standards for demanding industrial piping applications.
| Specification | Details |
|---|---|
| Specification Of : | Stainless Steel 347 Flanges |
| Technique Use In Forging | Forged, Heat Treated & Machined |
| Flanges Top 4 Types | Screwed, Forged, Threaded, Plate |
| Mostly Use Types | Lap Joint, Threaded, Weld Neck, Blind, Slip-On, Socket-Weld |
| Industries Use | Waterworks & Municipal Pipe Systems Nuclear Power & The Power Plants Industry Food Processing & Manufacturing |
| High Temperature | Above 400°C (750°F) And Above 200°C (400°F) For 150LB |
| Low Temperature | Above -29 °C (−20°F) |
| JIS Standards | 5K To 63K |
| Manufacturing Flange Face | Lap-Joint Face, Large Tongue & Groove, Small Tongue Groove, RTJ, FF, Raised Face, Large Male-Female And Small Male-Female |
| Size | 1/2 Inch To 48 Inch |
| We Manufacturer This Materials | Carbon Steel, Inconel, Hastelloy, Copper Nickel, Stainless Steel, Cast Iron, Duplex Steel & Super Duplex Steel, Wrought Iron, Alloy Steel, Mild Steel. |
| Thickness Size | Normal Pipe Size ≤ 18 |
| Bore Diameter | NPS ≤ 10 |
| RPF India Manufacturer Below Standards | UNI, EN-1092, ANSI/ASME B16.5, B16.47 Series A & B, BS1560-3.1, API7S-15, ASME B16.48, AWWA C207, IS 2062, EN1092, API7S-43, MSS S44, ISO70051, ASME B16.36, DIN, API, ISO, API605, BS4504 |
| Pressure Ratings | 150 To 2500 |
Stainless Steel 347 Flanges are available in sizes ranging from 1/2 inch to 48 inches with pressure ratings from Class 150 to Class 2500. They are manufactured to ANSI, ASME, DIN, EN, JIS, API, BS and other international standards.
Stainless Steel 347 Flanges contain controlled amounts of carbon, chromium, manganese, nickel, phosphorus, sulfur, silicon, and columbium/tantalum (Cb/Ta) to provide excellent corrosion resistance, oxidation resistance, and high-temperature performance in demanding industrial applications.
| Grade | C | Cr | Mn | Ni | P | S | Si | Cb/Ta |
|---|---|---|---|---|---|---|---|---|
| 347 | 0.08 max | Min: 17.0 Max: 20.0 |
2.0 max | Min: 9.0 Max: 13.0 |
0.04 max | 0.30 max | 0.75 max | Min: 10 × C Max: 1.0 |
The table shows the standard chemical composition limits for Stainless Steel 347 Flanges. All values are expressed as percentages by weight and comply with applicable material specifications.
The mechanical properties of Stainless Steel 347 Flanges indicate their minimum tensile strength, minimum yield strength, elongation, and maximum hardness values for high-temperature and industrial piping applications.
| Grade | Tensile Strength ksi (MPa) Min | Yield Strength 0.2% Offset ksi (MPa) Min | Elongation (% in 50 mm) Min | Hardness (Brinell) Max | Hardness (Rockwell B) Max |
|---|---|---|---|---|---|
| 347 | 75 (515) |
30 (205) |
40 | 201 | 95 |
These values represent the standard mechanical properties of Stainless Steel 347 Flanges, including tensile strength, yield strength, elongation, and maximum hardness. Actual values may vary depending on manufacturing process, heat treatment, product dimensions, and applicable material standards.