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Alloy steel F91 flange is an industrial pipe component that is widely used in various industrial fields due to its excellent corrosion resistance and mechanical properties. This flange is composed of various elements such as carbon, manganese, silicon, sulfur, chromium and molybdenum, with a 4% chromium content having a positive impact on its corrosion resistance and mechanical properties.
Alloy Steel F91 Blind Flanges has a minimum yield strength of 275MPa and a minimum tensile strength of 485MPa. This allows them to withstand extreme working environments and high-stress conditions.
The manufacturing of alloy steel F91 flanges follows a series of international and domestic standards, such as ASME B16.47, B16.5, etc. These specifications ensure the quality and reliability of the product, making it suitable for use in a variety of piping systems. A182 F91Alloy Steel Lap Joint Flanges are available in diameters ranging from ½ inch to 36 inches and with different pressure ratings from PN6 to PN64 to meet the needs of different fields.
Class F91 flanges are mainly divided into two categories: A182 F91 Class 1 and A182 F91 Class 2. Among them, A182 F91 Type 1 flange is the most commonly used type.
ASTM A182 F91 grade flanges are widely used in chemical, petrochemical, oil and gas and petroleum industries, especially playing an important role in oil and gas transmission pipelines. These flanges can withstand high temperatures and pressures and have good corrosion resistance, ensuring the safety and stability of oil and gas transportation.
F91 Alloy Steel Flanges Mechanical Properties Analysis
| Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 380 | 585 | 20 % |
ASME SA 182 Gr F91 Pipe Flange Chemical Structure
| Grade | C | Mn | Si | P | S | Cr | Mo |
| Alloy Steel F91 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
ASTM A182 F91 grade flanges
ASME SA182 Gr F91 Flange Dimensions
| Grade/Specification | ASTM / ASME A182 F91 |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Size | ½" to 36″ |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
GNEE is committed to the R&D, manufacturing and service of various special seamless steel pipes. With excellent products, high-quality services and reasonable prices, it is widely exported to more than 50 countries and regions in Europe, the United States, the Middle East, Southeast Asia, and Africa.
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