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SAE Blind Flange is a high-performance flange designed for piping and tubing systems, compliant with the SAE J518C standard. Manufactured from premium SS304 stainless steel, it offers exceptional corrosion resistance and mechanical strength. Available in sizes ranging from 1/2 to 5 inches, it is suitable for a wide range of industrial applications. With a design pressure of up to 3000 psi, it ensures reliability and safety in high-pressure environments. SAE Blind Flange is an ideal choice for sealing and isolating piping systems, widely used in hydraulic, pneumatic, and fluid transfer systems to meet stringent industrial requirements.
The high reliability of SAE Blind Flange is one of its core advantages, achieved through strict quality control and testing from raw material selection to final product delivery.
1. Raw Material Quality Control
Material Selection: SAE Blind Flange is made from SS304 stainless steel, with chemical composition compliant with ASTM A240 standards, ensuring excellent corrosion resistance, high-temperature resistance, and mechanical strength.
Chemical Composition: Cr (18%-20%), Ni (8%-10.5%), C (≤0.08%), Mn (≤2%), Si (≤1%), P (≤0.045%), S (≤0.03%).
Material Testing: Each batch of raw materials undergoes optical emission spectroscopy (OES) and mechanical property testing to ensure compliance with standards.
Material Selection: SAE Blind Flange is made from SS304 stainless steel, with chemical composition compliant with ASTM A240 standards, ensuring excellent corrosion resistance, high-temperature resistance, and mechanical strength.
Chemical Composition: Cr (18%-20%), Ni (8%-10.5%), C (≤0.08%), Mn (≤2%), Si (≤1%), P (≤0.045%), S (≤0.03%).
Material Testing: Each batch of raw materials undergoes optical emission spectroscopy (OES) and mechanical property testing to ensure compliance with standards.
2. Manufacturing Process Control
Precision Machining: SAE Blind Flange is processed using CNC machines to ensure flatness and dimensional accuracy of the flange face.
Precision Machining: SAE Blind Flange is processed using CNC machines to ensure flatness and dimensional accuracy of the flange face.
Surface Roughness: Ra ≤ 3.2 μm, ensuring a smooth sealing surface and reducing leakage risks.
Dimensional Tolerance: Compliant with ISO 2768-mK standards, ensuring perfect compatibility with pipes and other flanges.
Heat Treatment: SAE Blind Flange undergoes solution annealing to eliminate internal stresses and enhance corrosion resistance and mechanical properties.
Heat Treatment Temperature: 1040°C - 1100°C, followed by rapid cooling to room temperature.
3. Pressure Testing
Hydrostatic Testing: Each SAE Blind Flange undergoes hydrostatic testing at 1.5 times the design pressure (i.e., 4500 psi) for 5 minutes, ensuring no leakage or deformation.
Hydrostatic Testing: Each SAE Blind Flange undergoes hydrostatic testing at 1.5 times the design pressure (i.e., 4500 psi) for 5 minutes, ensuring no leakage or deformation.
Pneumatic Testing: Selected SAE Blind Flange units undergo pneumatic testing at 1.1 times the design pressure (i.e., 3300 psi) to verify sealing performance in gas media.
4. High-Temperature Performance Testing
High-Temperature Endurance Test: SAE Blind Flange is placed in a 200°C environment for 1000 hours to evaluate changes in mechanical and sealing performance.
High-Temperature Endurance Test: SAE Blind Flange is placed in a 200°C environment for 1000 hours to evaluate changes in mechanical and sealing performance.
Test Results: No deformation, and sealing performance remains stable.
Thermal Cycling Test: SAE Blind Flange undergoes 100 thermal cycles between -20°C and 200°C to assess thermal fatigue resistance.
Test Results: No cracks or deformation, and sealing performance shows no significant changes.
5. Corrosion Resistance Testing
Salt Spray Test: SAE Blind Flange is exposed to a 5% NaCl salt spray environment for 500 hours to evaluate corrosion resistance.
Salt Spray Test: SAE Blind Flange is exposed to a 5% NaCl salt spray environment for 500 hours to evaluate corrosion resistance.
Test Results: No rust on the flange surface, compliant with ASTM B117 standards.
Chemical Media Test: SAE Blind Flange is immersed in acid (pH=3), alkali (pH=10), and oil media for 30 days to assess chemical corrosion resistance.
Test Results: No corrosion on the flange surface, and sealing performance remains stable.
6. Sealing Performance Testing
O-Ring Seal Test: SAE Blind Flange uses NBR or FKM O-rings, tested at 3000 psi to ensure zero leakage.
Test Results: Leakage rate ≤ 0.01 mL/min, compliant with ISO 5208 standards.
O-Ring Seal Test: SAE Blind Flange uses NBR or FKM O-rings, tested at 3000 psi to ensure zero leakage.
Test Results: Leakage rate ≤ 0.01 mL/min, compliant with ISO 5208 standards.
Metal Gasket Test: SAE Blind Flange uses soft steel or stainless steel metal gaskets, tested at 3000 psi to ensure reliability in high-pressure environments.
Test Results: Leakage rate ≤ 0.001 mL/min, compliant with API 6A standards.
Conclusion
SAE Blind Flange is an ideal choice for sealing and isolating piping systems, offering exceptional corrosion resistance, high mechanical strength, and rigorous manufacturing processes. It is widely used in hydraulic, pneumatic, and fluid transfer systems to meet demanding industrial requirements.
SAE Blind Flange is an ideal choice for sealing and isolating piping systems, offering exceptional corrosion resistance, high mechanical strength, and rigorous manufacturing processes. It is widely used in hydraulic, pneumatic, and fluid transfer systems to meet demanding industrial requirements.
With its superior performance and reliability, SAE Blind Flange ensures safety and efficiency in high-pressure and corrosive environments, making it a trusted solution for industrial applications.
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