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SAE Closed Flange
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Name: SAE Closed Flange
Standard: SAE J518C
Type: Closed
Size: 1/2 to 2 inch
Material: SS316
Pressure: 6000 psi
Application: Used in Pipe and Tube Systems
Standard: SAE J518C
Type: Closed
Size: 1/2 to 2 inch
Material: SS316
Pressure: 6000 psi
Application: Used in Pipe and Tube Systems
Quantity
SAE Closed Flange is a high-performance flange compliant with the SAE J518C standard, specifically designed for high-pressure piping and tubing systems. Manufactured from premium SS316 stainless steel, it offers exceptional corrosion resistance and mechanical strength, making it suitable for extreme operating conditions. With sizes ranging from 1/2 to 2 inches and a rated pressure of up to 6000 psi, SAE Closed Flange ensures long-term stability in high-pressure, high-temperature, and corrosive media environments. Widely used in petrochemical, hydraulic systems, and industrial piping applications, SAE Closed Flange is the ideal choice for efficient sealing and reliable connections.
SAE Closed Flange is an austenitic stainless steel flange renowned for its excellent corrosion resistance, making it a preferred choice in industries such as chemical processing, pharmaceuticals, and marine engineering. Its corrosion resistance is primarily attributed to its chemical composition and microstructure, particularly the addition of molybdenum (Mo), which significantly enhances its performance in various corrosive media. By utilizing SS316 material, SAE Closed Flange further improves its suitability for harsh environments, establishing itself as a top choice for high-pressure and corrosive applications.
1. Chemical Composition and Corrosion Resistance
The typical chemical composition of SAE Closed Flange is as follows:
Chromium (Cr): 16-18%
Chromium forms a dense chromium oxide (Cr₂O₃) passive layer on the surface, effectively preventing corrosive media from contacting the base metal.
The typical chemical composition of SAE Closed Flange is as follows:
Chromium (Cr): 16-18%
Chromium forms a dense chromium oxide (Cr₂O₃) passive layer on the surface, effectively preventing corrosive media from contacting the base metal.
Nickel (Ni): 10-14%
Nickel stabilizes the austenitic structure, enhancing the material's toughness and corrosion resistance.
Nickel stabilizes the austenitic structure, enhancing the material's toughness and corrosion resistance.
Molybdenum (Mo): 2-3%
Molybdenum significantly improves the resistance to pitting and crevice corrosion in chloride environments (e.g., seawater) and acidic media.
Molybdenum significantly improves the resistance to pitting and crevice corrosion in chloride environments (e.g., seawater) and acidic media.
Carbon (C): ≤0.08%
Low carbon content reduces the risk of intergranular corrosion.
Low carbon content reduces the risk of intergranular corrosion.
By leveraging the advantages of SS316 material, SAE Closed Flange ensures long-term stability in extreme environments. Whether in high-pressure piping or corrosive media, SAE Closed Flange delivers exceptional performance.
2. Corrosion Resistance Performance
SS316 exhibits excellent resistance in the following corrosive media, making SAE Closed Flange the preferred choice for high-pressure and corrosive environments:
SS316 exhibits excellent resistance in the following corrosive media, making SAE Closed Flange the preferred choice for high-pressure and corrosive environments:
Acidic Media
Sulfuric Acid (H₂SO₄): At room temperature, SAE Closed Flange shows good resistance to sulfuric acid at concentrations ≤15%; resistance decreases at high temperatures or concentrations.
Sulfuric Acid (H₂SO₄): At room temperature, SAE Closed Flange shows good resistance to sulfuric acid at concentrations ≤15%; resistance decreases at high temperatures or concentrations.
Hydrochloric Acid (HCl): SS316 offers limited resistance to low concentrations (≤1%) of hydrochloric acid but is susceptible to corrosion at high concentrations or elevated temperatures.
Phosphoric Acid (H₃PO₄): At room temperature, SS316 demonstrates good resistance to phosphoric acid at concentrations ≤85%.
Nitric Acid (HNO₃): SS316 exhibits excellent resistance to nitric acid at concentrations ≤65%, making it suitable for chemical and pharmaceutical industries.
Nitric Acid (HNO₃): SS316 exhibits excellent resistance to nitric acid at concentrations ≤65%, making it suitable for chemical and pharmaceutical industries.
Alkaline Media
Sodium Hydroxide (NaOH): SAE Closed Flange shows good resistance to sodium hydroxide at concentrations ≤50% at room temperature; resistance decreases at high temperatures or concentrations.
Sodium Hydroxide (NaOH): SAE Closed Flange shows good resistance to sodium hydroxide at concentrations ≤50% at room temperature; resistance decreases at high temperatures or concentrations.
Ammonium Hydroxide (NH₄OH): SS316 offers excellent resistance to ammonium hydroxide, making it ideal for fertilizer and chemical industries.
Salt Media
Chlorides (e.g., NaCl): SAE Closed Flange demonstrates excellent resistance to pitting and crevice corrosion in chloride environments, making it suitable for marine engineering and seawater treatment equipment.
Chlorides (e.g., NaCl): SAE Closed Flange demonstrates excellent resistance to pitting and crevice corrosion in chloride environments, making it suitable for marine engineering and seawater treatment equipment.
Sulfates (e.g., Na₂SO₄): SS316 shows good resistance to sulfates, making it applicable in water treatment and chemical industries.
Organic Media
SAE Closed Flange exhibits good resistance to most organic acids (e.g., acetic acid, citric acid) and organic solvents (e.g., ethanol, acetone), making it suitable for food processing and pharmaceutical industries.
SAE Closed Flange exhibits good resistance to most organic acids (e.g., acetic acid, citric acid) and organic solvents (e.g., ethanol, acetone), making it suitable for food processing and pharmaceutical industries.
Conclusion
With its superior corrosion resistance derived from SS316 material, SAE Closed Flange is the preferred choice in industries such as chemical processing, pharmaceuticals, and marine engineering. Its high chromium, nickel, and molybdenum content, combined with its low-carbon design, ensures excellent resistance to acids, alkalis, salts, and organic media. Whether against pitting, crevice corrosion, or intergranular corrosion, SAE Closed Flange provides reliable protection, ensuring the long-term stability of equipment and piping systems.
With its superior corrosion resistance derived from SS316 material, SAE Closed Flange is the preferred choice in industries such as chemical processing, pharmaceuticals, and marine engineering. Its high chromium, nickel, and molybdenum content, combined with its low-carbon design, ensures excellent resistance to acids, alkalis, salts, and organic media. Whether against pitting, crevice corrosion, or intergranular corrosion, SAE Closed Flange provides reliable protection, ensuring the long-term stability of equipment and piping systems.
SAE Closed Flange stands out as a high-performance solution for demanding applications, offering unmatched reliability and durability in the most challenging environments.
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