Blind Flange Supplier
- We offer high-quality blind flanges in various materials and sizes, providing reliable sealing and pipeline modifications for valves, fittings, and flow direction changes in industrial applications.
- Our customization services include tailored sizes, pressure ratings, material combinations, and surface treatments, ensuring optimal fit and durability for your specific needs.
- Carbon, Stainless, and Alloy Steel Materials
- Applicable for 2-12 Inch NPS
- 150 LBS, 300 LBS, 600 LBS Pressure Ratings Optional
- Meet ANSI, DIN, JIS, BS Standards
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Based on Design Type
Flat Face Blind Flange
- Flat, no raised section for sealing.
- Flat gasket or spiral wound gasket.
- Pressure rating up to 150 psi.
- Ideal for non-critical services and low-pressure systems.
Raised Face Blind Flange
- Raised face designed for better gasket compression.
- Suitable for spiral wound gaskets or soft gaskets.
- Higher pressure, Class 150 to 2500, can be handled.
- Ideal for situations involving medium to high pressure.
Ring Type Joint Blind Flange
- Has a groove for an RTJ gasket, providing a tighter seal.
- Suitable for very high-pressure, up to 10,000 psi.
- Requires RTJ (metallic) gasket for enhanced seal.
- Ideal for High-pressure and critical services, e.g., oil & gas.
End Blind Flange Materials Options
Carbon Steel
- Main component is iron with a small amount of carbon.
- High tensile strength, requires coating or painting to prevent corrosion.
- Suitable for oil, natural gas, and water pipelines.
Stainless Steel
- An iron and chromium alloy, occasionally containing nickel.
- Strong and resistant to corrosion.
- Perfect for manufacturing chemicals, medicines, and food processing.
Ductile Iron
- Cast iron with alloy elements forming ductile cast iron.
- High strength, good impact resistance, and fatigue resistance.
- Used in water treatment, sewage systems.
Nickel Alloy
- Main component is nickel, usually containing chromium, molybdenum, etc.
- Excellent durability against wear, corrosion, and extreme heat conditions.
- Utilized in marine environments, chemical processing, and aircraft.
Blind Pipe Flange Technical Specification
Parameter | Typical Range | |
| Outside Diameter (OD) | 1/2 inch to 60 inches (15mm to 1524mm) |
Thickness | 0.5 inch to 4 inches (12mm to 102mm) | |
Pressure Class | Class 150 to Class 2500 | |
Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) | |
Number of Bolt Holes | Typical hole numbers are 4, 8, 12, or 16. | |
Material | Carbon Steel, Stainless Steel, Alloy Steel, Cast Iron, Nickel Alloy | |
Temperature Range | -29°C to 540°C (-20°F to 1000°F) | |
Standards | ASME B16.5, ASME B16.47, API 6A, etc. | |
Surface Treatment | Galvanized, Coated, Painted, Anti-corrosion Treatment | |
Thread Type | Internal Thread, External Thread |
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Applicable Pipe Sizes
3" /4” Blind Flange
- Perfect for low to medium pressure situations and compact piping systems. Common in municipal, HVAC, and small factory systems.
6" Blind Flange
- Fits medium-sized pipe systems, widely used in water treatment, industrial pipes, and chemical processing, offering excellent sealing in moderate pressure and temperature systems.
8" Blind Flange
- Designed for larger pipes, commonly used in industrial processing, chemical manufacturing, and oil & gas industries, able to handle higher pressures and temperatures.
12" Blind Flange
- Used in large industrial pipe systems, ideal for high-flow, heavy-load applications like oil, gas, and chemical industries, withstanding very high pressures and temperatures.
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What Customization Services Can We Provide for You?
Size Customization
- We offer flexible size customization, manufacturing blind flanges from 1" (25mm) to 48" (1200mm) to meet your pipeline specifications, with options for special requirements.
Material options
- We offer a variety of materials, including high-temperature and low-temperature alloys, ensuring reliable performance under various pressure, temperature, and corrosion conditions for your blind flanges.
Surface treatments
- Provide wear resistance, and aesthetics. Options include galvanizing, anti-rust coating, polishing, and hot/cold dip galvanizing for various industrial environments.
Pressure Ratings
- We offer low, medium, and high-pressure options (Class 150-2500) to suit various systems, from water pipelines to high-pressure industrial applications.
Other Custom Options
- We offer various fasteners (bolts, nuts, etc.) to ensure secure installation. Certifications like ASME, ANSI, DIN, JIS can be provided to meet industry standards.
Applications
Chemical Industry
- Blind flanges seal pipes in chemical plants, preventing leaks and ensuring safe operation, allowing easy maintenance without disrupting processes or exposing hazardous chemicals.
Oil and Gas
- In oil and gas pipelines, blind flanges securely seal pipe ends, preventing leaks in high-pressure systems and enabling safe maintenance and inspections.
Food and Pharmaceutical Industry
- Blind flanges ensure hygienic conditions by sealing pipes, facilitating easy cleaning, and helping meet safety and regulatory standards in food and pharmaceutical applications.
Water Treatment Systems
- Blind flanges seal pipe ends during maintenance or testing, preventing water flow, ensuring efficient repairs, and maintaining leak-free operation in water treatment systems.
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FAQs
Is it possible to use blind flanges in extremely hot or cold conditions?
Yes, Blind Flanges can be used in both high and low-temperature environments. To ensure performance in extreme temperatures, from cryogenic to high-heat applications, material selection (such as stainless steel or nickel alloys) is crucial.
What advantages do RTJ (Ring Type Joint) Blind Flanges offer?
RTJ Blind Flanges provide a superior seal compared to other face types, especially in high-pressure systems. They are designed for critical sealing applications where leakage must be minimized, such as in oil and gas or chemical processing industries.
Is it possible to employ blind flanges in subsea applications?
Yes, subsea or underwater environments require high-performance sealing, and blind flanges are essential for such installations. Corrosion-resistant materials like monel or super duplex stainless steel are used for their excellent durability under extreme pressures and marine conditions.
Are Blind Flanges reusable?
In many cases, Blind Flanges can be reused, provided they have not been subject to excessive wear, corrosion, or damage. To guarantee the best seal, gaskets should be changed on a regular basis.
What are the cost factors of a Blind Flange?
The cost of a Blind Flange depends on factors like material type (stainless steel is more expensive than carbon steel), size, pressure class, and surface finish. Customization or special certifications can also impact the price.
Is it possible to use blind flanges in high-vibration settings?
Yes, Blind Flanges can be used in vibration-prone environments, but care must be taken to use materials and designs that can withstand mechanical stresses. Adding reinforcements or using specific flange types like raised face or RTJ can help in such applications.
What role do blind flanges have in industrial pipeline safety?
Blind flanges prevent unintended flow, reduce the risk of pressure spikes, and can help during system maintenance or shutdowns.