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Stainless Steel Fitting
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Size: 3/8"~60" (DN10~DN1500);
Pressure: Class 150lbs ~2500lbs; PN16, PN25, PN40; 10K, 20K;
Flange Face: RF, FF, RTJ;
Manufacturing Standard: ANSI B16.5, ASME B16.47, JIS B2220, HG/T20592, DIN25727;
Material: ASTM A182 F304, F304L, F316, F316L, F310S, F321, SS304, SS316;
Technology: Forging, CNC lathe processing;
Mark: Product Name, Size, Pressure, Standard, Material, Heat No.;
Surface Treatment: Degreasing cleaning, Pickling;
Packing: Bubble wrap or plastic cover -Wooden Case or Pallet;
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The High-Integrity Stainless Steel Blind Flange is a premium pipe fitting designed to permanently seal the end of a pipeline or provide access for inspection and maintenance in high-pressure, corrosive environments. Constructed from 304 or 316 stainless steel, this flange features a solid disc and bolt holes compliant with ANSI B16.5, ensuring leak-free performance and structural stability.
Robust Construction:
Solid stainless steel disc (304/316) with thickness compliant with ASME B16.5 (Class 150 to 2500), rated for working pressures up to 2,500 PSI (316 stainless steel, Class 300).
Smooth raised face (RF) or flat face (FF) finish (Ra ≤1.6μm) for optimal gasket contact, reducing leakage risks by 40% compared to rough surfaces.
Precision Machining:
Bolt holes drilled to precise pitch circles (P.C.D.) per ANSI B16.5, ensuring alignment with mating flanges and even load distribution across bolts.
Chamfered edges prevent burrs and facilitate gasket installation, with optional counterbored holes for socket-weld bolts in high-vibration applications.
Corrosion & Temperature Resistance:
316 stainless steel variant resists chloride pitting in marine and chemical environments, while 304 is ideal for general industrial use (temperature range: -250°C to 800°C).
Passivated surface (316) reduces metal ion leaching, compliant with FDA 21 CFR Part 177 for food-grade applications.
Compliance & Certification:
Meet ASME B16.5, ISO 1092-1, and NACE MR0175 (316 stainless steel), with material traceability reports and mill certificates available for audit purposes.
Perfect for pipeline sealing and access in critical systems:
Oil & Gas Downstream: Sealing pipeline endpoints in refineries and petrochemical plants, with 316 stainless steel resisting hydrogen sulfide corrosion.
Food & Beverage: Providing access ports for tank cleaning in dairies and breweries, with 304 stainless steel meeting 3-A Sanitary Standards for direct food contact.
Power Generation: Sealing steam pipeline test points in thermal plants, withstanding 550°C and 200 bar pressure in combined cycle systems.
Marine Engineering: Sealing hull penetrations and ballast tank access points, with 316 stainless steel enduring constant seawater immersion.
Q: How to choose the correct flange class for my application?
A: Select based on working pressure (e.g., Class 150 for ≤300 PSI, Class 300 for ≤800 PSI), detailed in ASME B16.5 pressure-temperature tables.
Q: Can blind flanges be reused?
A: Yes, if the surface is undamaged and cleaned thoroughly; replace gaskets and bolts for reliable resealing.
Q: What gasket material is recommended for high-temperature steam?
A: Use graphite or metal-jacketed gaskets (up to 650°C), avoiding PTFE gaskets which degrade above 260°C.
Q: Are there lightweight options for offshore applications?
A: Yes, lightweight 316 stainless steel flanges with reduced bolt patterns are available, meeting DNVGL standards for offshore platforms.
The High-Integrity Stainless Steel Blind Flange is a premium pipe fitting designed to permanently seal the end of a pipeline or provide access for inspection and maintenance in high-pressure, corrosive environments. Constructed from 304 or 316 stainless steel, this flange features a solid disc and bolt holes compliant with ANSI B16.5, ensuring leak-free performance and structural stability.
Robust Construction:
Solid stainless steel disc (304/316) with thickness compliant with ASME B16.5 (Class 150 to 2500), rated for working pressures up to 2,500 PSI (316 stainless steel, Class 300).
Smooth raised face (RF) or flat face (FF) finish (Ra ≤1.6μm) for optimal gasket contact, reducing leakage risks by 40% compared to rough surfaces.
Precision Machining:
Bolt holes drilled to precise pitch circles (P.C.D.) per ANSI B16.5, ensuring alignment with mating flanges and even load distribution across bolts.
Chamfered edges prevent burrs and facilitate gasket installation, with optional counterbored holes for socket-weld bolts in high-vibration applications.
Corrosion & Temperature Resistance:
316 stainless steel variant resists chloride pitting in marine and chemical environments, while 304 is ideal for general industrial use (temperature range: -250°C to 800°C).
Passivated surface (316) reduces metal ion leaching, compliant with FDA 21 CFR Part 177 for food-grade applications.
Compliance & Certification:
Meet ASME B16.5, ISO 1092-1, and NACE MR0175 (316 stainless steel), with material traceability reports and mill certificates available for audit purposes.
Perfect for pipeline sealing and access in critical systems:
Oil & Gas Downstream: Sealing pipeline endpoints in refineries and petrochemical plants, with 316 stainless steel resisting hydrogen sulfide corrosion.
Food & Beverage: Providing access ports for tank cleaning in dairies and breweries, with 304 stainless steel meeting 3-A Sanitary Standards for direct food contact.
Power Generation: Sealing steam pipeline test points in thermal plants, withstanding 550°C and 200 bar pressure in combined cycle systems.
Marine Engineering: Sealing hull penetrations and ballast tank access points, with 316 stainless steel enduring constant seawater immersion.
Q: How to choose the correct flange class for my application?
A: Select based on working pressure (e.g., Class 150 for ≤300 PSI, Class 300 for ≤800 PSI), detailed in ASME B16.5 pressure-temperature tables.
Q: Can blind flanges be reused?
A: Yes, if the surface is undamaged and cleaned thoroughly; replace gaskets and bolts for reliable resealing.
Q: What gasket material is recommended for high-temperature steam?
A: Use graphite or metal-jacketed gaskets (up to 650°C), avoiding PTFE gaskets which degrade above 260°C.
Q: Are there lightweight options for offshore applications?
A: Yes, lightweight 316 stainless steel flanges with reduced bolt patterns are available, meeting DNVGL standards for offshore platforms.
