ASTM A182 F304 Stainless Steel Flange Blind Raised Face B16.5

ASTM A182 F304 Stainless Steel Flange Blind Raised Face B16.5

ASTM A182 is an American Society for Testing and Materials (ASTM) standard specifically for forged or rolled alloy steel and stainless steel pipe flanges, forged pipe fittings, valves, and other components for high-temperature service. ASTM A182 F304 is a specific material designation within this standard. It specifies the chemical composition, mechanical properties, heat treatment, and other technical requirements for forgings made of 304 stainless steel.

Key Features of ASTM A182 F304 Stainless Steel Flanges

• Excellent Reliability: The material is uniform and stable, making it easy to weld, forge, and process.
• Excellent Corrosion Resistance: It offers excellent corrosion resistance to air, fresh water, steam, food media, and various chemicals (such as dilute nitric acid and organic acids). Suitable for use in the chemical, food, and pharmaceutical industries.
• Excellent High and Low Temperature Performance: Excellent high and low temperature performance.

ASTM A182 F304 Stainless Steel Flange Manufacturing Process and Heat Treatment

• Forging: A steel billet is typically forged into a flange-like blank using die forging or open forging.
• Heat Treatment: Solution heat treatment is mandatory. The forging is heated to above 1040°C, held at that temperature, and then rapidly cooled to achieve a uniform austenitic structure. This dissolves carbides at the grain boundaries, improving the flange's corrosion resistance while softening the material to optimize its plasticity and machinability.
• Machining: The heat-treated forging is then finished by turning sealing surfaces, bolt holes, grooves, and other features to meet relevant dimensional standards.

Typical Applications of ASTM A182 F304 Stainless Steel Flanges

• Petrochemical: Pipes transporting non-corrosive chemicals, process water, and steam.
• Energy and Power: Feedwater, steam, and condensate systems in power plants.
• Food and Pharmaceutical: Piping systems requiring high hygiene and cleanliness, as 304 stainless steel is easy to clean and disinfect.
• Papermaking: Bleaching plants and water treatment systems.
• Shipbuilding: Seawater cooling systems, fire protection systems, and domestic water systems.