DIN 2627 Carbon Steel flanges PN 400 are high-strength blind flanges designed for use in high-pressure applications across a wide range of industrial systems. Manufactured in accordance with the DIN 2627 standard, these flanges are primarily used to isolate piping systems by sealing off the end of a pipeline or vessel opening. The PN 400 pressure rating (400 bar / 5800 psi) ensures reliable performance under intense pressure and mechanical stress. Carbon steel flanges offer excellent tensile strength, impact resistance, and structural integrity, making them a cost-effective solution for systems where corrosion resistance is not the primary concern. Typically used in applications involving water, steam, oil, and gas, DIN 2627 carbon steel blind flanges are well-suited for power plants, refineries, petrochemical facilities, and general industrial systems. Ladhani Metal Corporation is a trusted global manufacturer and exporter of carbon steel flanges, producing components that meet rigorous international standards for material quality, dimensional accuracy, and pressure containment. Pressure Rating: • PN 400 (400 bar / 5800 psi): Suitable for extremely high-pressure systems in industrial pipelines and mechanical installations. Flange Type: • Blind Flanges Solid, non-bored flanges used to terminate flow or provide system isolation. Commonly used for pressure testing, maintenance access, and future expansion. • Flat Face (FF) Flanges Flat sealing surfaces designed for use with full-face gaskets and flat-faced mating flanges. Promotes even bolt loading and effective sealing under high-pressure conditions. Carbon Steel Grades and Composition: ASTM A105 (Forged Carbon Steel) • Carbon (C): ≤ 0.35% • Manganese (Mn): 0.60 – 1.05% • Phosphorus (P): ≤ 0.035% • Sulfur (S): ≤ 0.040% • Silicon (Si): 0.10 – 0.35% Applications: Commonly used for high-temperature and high-pressure systems. Ideal for oil and gas, steam, and hydraulic systems. ASTM A350 LF2 (Low-Temperature Carbon Steel) • Carbon (C): ≤ 0.30% • Manganese (Mn): 0.60 – 1.35% • Silicon (Si): 0.15 – 0.30% • Nickel (Ni): ≤ 1.0% Applications: Suitable for sub-zero temperature services such as cryogenic systems, LNG processing, and cold-weather pipelines. Applications of DIN 2627 Carbon Steel Flanges PN 400: • Oil and Gas Transmission Lines Used in pipeline systems and refineries handling hydrocarbons under high pressure. • Steam and Power Generation Plants Ideal for high-pressure steam lines, condensate systems, and boiler feedwater applications. • Petrochemical and Chemical Industries Suitable for handling neutral and non-aggressive chemical fluids and process gases. • Water Treatment and Pumping Stations Used in high-pressure water systems, including pumping stations, pressure regulators, and testing units. • Heating, Ventilation, and Air Conditioning (HVAC) Employed in high-pressure chilled water and steam systems for industrial facilities. • General Manufacturing and Engineering Systems Reliable for structural piping systems in factories and mechanical installations. Key Features: • Compliant with DIN 2627 specifications • PN 400 pressure rating for ultra-high-pressure systems • Blind flange design allows for system isolation and pressure containment • Flat face design compatible with full-face gaskets and flat mating surfaces • Manufactured from forged carbon steels like ASTM A105 and A350 LF2 • Excellent strength, ductility, and impact resistance • Economical and durable for non-corrosive environments • Widely used across oil and gas, power, chemical, and water treatment sectors • Custom sizes, pressure classes, surface coatings, and face types available upon request Conclusion: DIN 2627 Carbon Steel Flanges PN 400 from Ladhani Metal Corporation are engineered for high-performance applications requiring strength, pressure retention, and reliability in demanding industrial environments. Whether used in power plants, oil pipelines, or steam systems, these flanges provide durable and cost-effective sealing for critical operations. Contact Ladhani Metal Corporation for product specifications, technical support, or custom solutions tailored to your piping system requirements.

DIN 2627 Super Duplex Steel flanges PN 400 are robust, high-performance blind flanges engineered for extremely demanding applications requiring exceptional strength, corrosion resistance, and reliability under ultra-high-pressure conditions. Designed according to the DIN 2627 standard, these flanges are primarily used to isolate sections of piping systems, especially in environments that involve aggressive media such as seawater, acidic chemicals, and high-temperature fluids. With a PN 400 pressure rating (400 bar / 5800 psi), these flanges are suitable for critical systems where both mechanical strength and corrosion resistance are vital. Ladhani Metal Corporation is a globally recognized supplier and exporter of Super Duplex DIN flanges, offering products that meet or exceed international quality, safety, and performance standards for extreme-service applications. Pressure Rating: • PN 400 (400 bar / 5800 psi): Designed for high-pressure operations in chemically aggressive and mechanically demanding environments. Flange Type: • Blind Flanges Flat, solid flanges without a bore used to seal the end of piping systems. Ideal for temporary shutdowns, pressure testing, or future system expansion. • Flat Face (FF) Flanges Feature a flat sealing surface, suitable for use with full-face gaskets and flat mating components to ensure consistent and effective sealing under pressure. Super Duplex Steel Grades and Composition: Super Duplex 2507 (UNS S32750) • Chromium (Cr): 24 – 26% • Nickel (Ni): 6 – 8% • Molybdenum (Mo): 3 – 5% • Nitrogen (N): 0.24 – 0.32% • Iron (Fe): Balance Applications: Exceptional corrosion resistance in seawater, brines, and acidic environments. Commonly used in offshore structures, desalination plants, and chemical processing systems. Applications of DIN 2627 Super Duplex Flanges PN 400: • Offshore Oil and Gas Platforms Used in topside and subsea installations exposed to high salinity, pressure, and harsh chemical environments. • Desalination and Water Treatment Plants Resistant to chloride-induced corrosion and fouling in seawater intake and brine discharge systems. • Chemical and Petrochemical Processing Ideal for aggressive process media such as chlorides, sulfur compounds, and acids at high temperatures and pressures. • Marine Engineering and Shipbuilding Excellent corrosion resistance in marine atmospheres, making them suitable for seawater cooling, ballast systems, and structural piping. • Pulp and Paper Industry Deployed in bleaching plants and alkaline recovery lines where strength and corrosion resistance are essential. • Power Generation and Nuclear Facilities Reliable under high-temperature and pressure cycles in superheated steam, feedwater, and condenser systems. Key Features: • Manufactured to DIN 2627 standard • PN 400 pressure class for ultra-high-pressure environments • Blind flange design for secure pipe end sealing or access closure • Flat face type for even gasket compression and leak-free performance • Available in Super Duplex 2507 (UNS S32750) and S32760 • Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking • Twice the strength of conventional stainless steels • Widely used in offshore, marine, petrochemical, and water treatment industries • Custom options available: sizes, pressure ratings, face types, and finishes Conclusion: DIN 2627 Super Duplex Steel Flanges PN 400 by Ladhani Metal Corporation are designed to withstand the harshest industrial environments, providing unmatched corrosion resistance, mechanical strength, and sealing reliability. These flanges are ideal for mission-critical applications in offshore, marine, chemical, and energy industries. For technical assistance, custom fabrication, or detailed product specifications, contact Ladhani Metal Corporation and ensure your systems are protected by industry-leading flange solutions.

DIN 2627 Inconel flanges PN 400 are premium-grade blind flanges engineered for ultra-high-pressure applications requiring exceptional corrosion resistance, heat resistance, and mechanical strength. Manufactured in accordance with the DIN 2627 standard, these flanges are designed to seal off the ends of piping systems, especially in extreme environments involving high temperatures, aggressive chemicals, or seawater exposure. The PN 400 rating (400 bar / 5800 psi) ensures performance under intense pressure conditions. Produced using high-performance nickel-based alloys such as Inconel 600, Inconel 625, and Inconel 718, these flanges are used extensively in aerospace, chemical processing, offshore oil and gas, marine, and power generation industries. Ladhani Metal Corporation is a leading global manufacturer and exporter of Inconel flanges, supplying components that conform to international standards for material integrity, pressure containment, and corrosion resistance. Pressure Rating: • PN 400 (400 bar / 5800 psi): Suitable for high-pressure piping systems in critical applications where maximum sealing and durability are essential. Flange Type: • Blind Flanges Solid, non-bored flanges used to isolate piping systems or terminate flow. Ideal for pressure testing, maintenance, and future pipeline expansions. • Flat Face (FF) Flanges Designed with a flat sealing surface for use with full-face gaskets and flat mating components, ensuring even load distribution and effective sealing. Inconel Grades and Composition: Inconel 600 (UNS N06600) • Nickel (Ni): ≥ 72% • Chromium (Cr): 14 – 17% • Iron (Fe): 6 – 10% • Manganese (Mn): ≤ 1% • Silicon (Si): ≤ 0.5% • Carbon (C): ≤ 0.15% • Sulfur (S): ≤ 0.015% Applications: Excellent resistance to oxidation, carburization, and chloride-ion stress corrosion cracking. Used in furnace components, heat exchangers, and food processing equipment. Inconel 625 (UNS N06625) • Nickel (Ni): ≥ 58% • Chromium (Cr): 20 – 23% • Molybdenum (Mo): 8 – 10% • Niobium + Tantalum (Nb + Ta): 3.15 – 4.15% • Iron (Fe): ≤ 5% • Carbon (C): ≤ 0.10% • Manganese (Mn): ≤ 0.5% • Silicon (Si): ≤ 0.5% Applications: Outstanding corrosion and fatigue resistance in seawater and chemical environments. Common in marine, aerospace, and offshore industries. Inconel 718 (UNS N07718) • Nickel (Ni): 50 – 55% • Chromium (Cr): 17 – 21% • Iron (Fe): Balance • Niobium + Tantalum (Nb + Ta): 4.75 – 5.5% • Molybdenum (Mo): 2.8 – 3.3% • Titanium (Ti): 0.65 – 1.15% • Aluminum (Al): 0.2 – 0.8% Applications: High strength and oxidation resistance up to 700°C. Used in jet engines, gas turbines, and high-pressure valves. Applications of DIN 2627 Inconel Flanges PN 400: • Offshore Oil and Gas Platforms Withstands high-pressure, high-salinity, and corrosive environments in subsea pipelines and risers. • Chemical Processing Plants Ideal for systems handling oxidizers, acids, solvents, and reactive compounds at high temperatures and pressures. • Aerospace and Jet Propulsion Used in fuel systems, hydraulic lines, and turbine enclosures where extreme heat and stress are common. • Nuclear and Power Generation Suited for high-pressure reactor lines and heat exchanger systems exposed to radiation, heat, and corrosive media. • Desalination and Seawater Systems Highly resistant to chloride-induced pitting and crevice corrosion. • High-Temperature and Reactive Media Systems Perfect for isolating systems exposed to thermal cycling and chemical attack. Key Features: • Manufactured to DIN 2627 standards • Rated for PN 400 ultra-high-pressure systems • Blind flange design for sealing pipe ends or testing access • Flat face design for even gasket compression and sealing • Available in Inconel 600, 625, and 718 • Excellent resistance to oxidation, acids, chlorides, and high heat • High mechanical strength and fatigue resistance • Used in critical industries including aerospace, marine, oil and gas, and chemical processing • Custom sizes, alloys, pressure ratings, and surface finishes available on request Conclusion: DIN 2627 Inconel Flanges PN 400 from Ladhani Metal Corporation offer exceptional performance and reliability in the most demanding service conditions. Whether your system involves corrosive chemicals, high-pressure steam, or marine exposure, these blind flanges deliver secure sealing, longevity, and safety. Contact Ladhani Metal Corporation for material selection, technical support, or custom solutions tailored to your high-performance application.

DIN 2627 stainless steel flanges PN 400 are precision-engineered blind flanges manufactured according to the DIN 2627 standard. Designed to withstand ultra-high-pressure conditions up to 400 bar (5800 psi), these flanges are used to terminate or isolate piping systems safely and effectively. Fabricated from high-grade stainless steels, including 304, 316, and 321, these blind flanges provide superior mechanical strength, corrosion resistance, and long service life in aggressive industrial environments. Ladhani Metal Corporation is a globally recognized manufacturer and exporter of stainless steel flanges. Our DIN 2627 PN 400 blind flanges are widely trusted in sectors such as oil and gas, chemical processing, marine, energy, and high-pressure utility systems for their durability, quality, and performance under extreme conditions. Pressure Rating: • PN 400 (400 bar / 5800 psi): Suitable for high-pressure pipelines and critical systems where absolute sealing and structural integrity are required. Flange Type: • Blind Flanges Solid, non-bored flanges used to block pipeline ends or vessel nozzles. These flanges are essential for system isolation during maintenance, testing, or future expansions. • Flat Face (FF) Flanges Flat face flanges are designed to mate with flat gaskets and flat-faced components. They provide even gasket compression and are ideal when used with cast iron or brittle materials to avoid flange distortion. Stainless Steel Grades and Full Composition: Stainless Steel 304 • Chromium (Cr): 18.0 – 20.0% • Nickel (Ni): 8.0 – 10.5% • Carbon (C): ≤ 0.08% (304), ≤ 0.03% (304L) • Manganese (Mn): ≤ 2.0% • Silicon (Si): ≤ 1.0% • Phosphorus (P): ≤ 0.045% • Sulfur (S): ≤ 0.03% • Iron (Fe): Balance Applications: Excellent general corrosion resistance. Commonly used in food processing, water systems, and chemical equipment. Stainless Steel 316 • Chromium (Cr): 16.0 – 18.0% • Nickel (Ni): 10.0 – 14.0% • Molybdenum (Mo): 2.0 – 3.0% • Carbon (C): ≤ 0.08% (316), ≤ 0.03% (316L) • Manganese (Mn): ≤ 2.0% • Silicon (Si): ≤ 1.0% • Phosphorus (P): ≤ 0.045% • Sulfur (S): ≤ 0.03% • Iron (Fe): Balance Applications: Enhanced resistance to chlorides and acidic environments. Ideal for marine, pharmaceutical, and chemical processing. Stainless Steel 321 • Chromium (Cr): 17.0 – 19.0% • Nickel (Ni): 9.0 – 12.0% • Titanium (Ti): ≥ 5 × C (typically 0.20 – 0.70%) • Carbon (C): ≤ 0.08% • Manganese (Mn): ≤ 2.0% • Silicon (Si): ≤ 1.0% • Phosphorus (P): ≤ 0.045% • Sulfur (S): ≤ 0.03% • Iron (Fe): Balance Applications: 321 stainless steel is stabilized with titanium, providing excellent resistance to intergranular corrosion after welding and high-temperature exposure. Commonly used in thermal processing, aerospace, and exhaust systems. Applications of DIN 2627 Stainless Steel Flanges PN 400: • Oil and Gas Industry Used in upstream and downstream systems, where high pressure and harsh chemicals are common. • Chemical and Petrochemical Plants Ideal for isolating high-pressure lines carrying corrosive or reactive chemicals. • Marine and Offshore Engineering Suitable for saltwater-exposed piping, ballast systems, and underwater applications requiring corrosion resistance. • Power Generation Applied in steam, nuclear, and thermal plants for sealing pressurized piping and vessel systems. • Aerospace and High-Temperature Systems 321-grade blind flanges are used in systems exposed to elevated temperatures and thermal cycling. • Water Treatment and Desalination Withstands chloride-induced corrosion in high-pressure brine and filtration lines. Key Features: • Manufactured to DIN 2627 specifications • PN 400 pressure rating for extreme pressure performance • Blind flange design ideal for system isolation and termination • Available in stainless steel grades 304, 304L, 316, 316L, and 321 • Flat face type for even gasket compression and sealing integrity • Superior corrosion resistance and mechanical strength • Suitable for aggressive chemical, marine, and high-temperature environments • Custom sizes, surface finishes, and pressure classes available upon request Conclusion: DIN 2627 Stainless Steel Flanges PN 400 by Ladhani Metal Corporation are designed for maximum performance in high-pressure, corrosive, and high-temperature environments. With material options including 304, 316, and titanium-stabilized 321 stainless steel, these blind flanges offer flexibility, reliability, and long-term service life across critical industries. Contact Ladhani Metal Corporation today for technical assistance, specifications, or custom flange solutions.

DIN 2543 Stainless Steel Flanges are flanges made from stainless steel that conform to the German industrial standard DIN 2543. These flanges are used to connect pipes, valves, pumps, and other equipment within a piping system. The DIN 2543 standard defines the specifications, dimensions, and materials for flanges used primarily in industrial applications where high strength, durability, and corrosion resistance are required. DIN 2543 refers to the "Flanges for pipes, slip-on flanges, welding neck flanges, and blind flanges." DIN 2543 flanges are PN 16, and they have specific dimensional standards for that pressure rating, ensuring compatibility and safety in pipeline applications. Here's a detailed description of DIN 2543 Stainless Steel Flanges: 1. Standard Overview (DIN 2543): • DIN 2543 refers to flanges that are used to connect pipes and related components in various industrial systems. It specifies welding neck flanges, slip-on flanges, and blind flanges among others. • The flanges covered by this standard are available in different pressure classes and materials, including stainless steel. • The main application of these flanges is in piping systems for industries such as chemical, oil and gas, water treatment, food processing, and HVAC. 2. Types of DIN 2543 Flanges: The standard covers different types of flanges, each with its own application: • Welding Neck Flanges (WN): o These flanges are designed to be welded to the pipe. They have a long tapered neck that provides better stress distribution and is suitable for high-pressure applications. o Application: Common in high-pressure and high-temperature systems. • Slip-On Flanges (SO): o These flanges fit over the pipe and are welded at both the inside and outside edges. They are easier to install compared to welding neck flanges. o Application: Suitable for low- and medium-pressure systems. • Blind Flanges (BL): o These flanges are used to seal the end of a pipe. They have no central hole and are typically used to close off piping systems or for future extensions. o Application: Used when a permanent or temporary closure is needed in a piping system. 3. Materials for Stainless Steel Flanges: DIN 2543 Stainless Steel flanges are typically manufactured from the following grades of stainless steel, which are selected based on the specific requirements of the application: • Grade 304 Stainless Steel (AISI 304): o The most common type of stainless steel, offering good corrosion resistance and forming ability. It is suitable for general-purpose applications in environments not subject to severe corrosion. o Applications: Food and beverage processing, chemical industries, and general industrial applications. • Grade 316 Stainless Steel (AISI 316): o Contains molybdenum (2–3%), which significantly enhances its resistance to pitting and crevice corrosion in chloride environments. It is widely used in more corrosive environments such as marine or chemical processing applications. o Applications: Marine environments, chemical industries, pharmaceuticals, and offshore applications. • Grade 321 Stainless Steel (AISI 321): o Similar to 304 but with added titanium to prevent carbide precipitation during welding. It is ideal for high-temperature environments and offers good oxidation resistance. o Applications: High-temperature systems, aerospace applications, and heat exchangers. 4. Gasket Surface Types: The gasket surface of DIN 2543 stainless steel flanges is crucial for creating a proper seal when two flanges are joined. The most common gasket surface types include: • Raised Face (RF): o A flange with a raised area where the gasket is placed. This is the most common type and provides a reliable seal. • Flat Face (FF): o The flange surface is flat and typically used in lower-pressure systems. • Ring Type Joint (RTJ): o This type has a groove for the insertion of a metal ring gasket, used in high-pressure or high-temperature applications. DIN 2543 SS flanges are designed to provide strong, durable, and leak-proof connections for pipes in various industries, with precise dimensions, materials, and pressure ratings tailored to different operational needs. The different types of flanges (Slip-on, Welding Neck, and Blind) allow for versatile use in a variety of applications.

DIN 2527 SS 321 Blind Flanges are specialized components used in industrial piping systems to close off the ends of pipes or equipment where no further connection is necessary. A blind flange is a solid, flat disc without a central bore, specifically designed to seal the open end of a pipe or a vessel. The DIN 2527 standard, developed by the German Institute for Standardization, defines the specifications for these flanges, ensuring that they meet high standards for dimensional accuracy, pressure tolerance, and mechanical strength. The SS 321 material, used for the production of these blind flanges, is an austenitic stainless steel known for its excellent resistance to high-temperature oxidation, corrosion, and scaling. The addition of titanium to this steel stabilizes its structure, making it suitable for environments where temperatures fluctuate or are consistently high. As a result, SS 321 blind flanges are frequently used in industries where both strength and resistance to harsh environmental conditions are paramount, including the chemical, petrochemical, aerospace, and power generation industries. By utilizing DIN 2527 SS 321 Blind Flanges, companies can ensure secure, long-lasting, and efficient closures for piping systems under challenging operational conditions. These flanges are essential in maintaining the integrity of systems exposed to elevated pressures and corrosive substances, ensuring the safe containment of fluids and gases. key Features of DIN 2527 SS 321 Blind Flanges: Material Composition of SS 321: Carbon (C): ≤ 0.08% Chromium (Cr): 17.0 - 19.0% Nickel (Ni): 9.0 - 12.0% Titanium (Ti): 5 times the carbon content, generally around 0.60% minimum, to prevent carbide precipitation. Manganese (Mn): 2.00% max Silicon (Si): 1.00% max Phosphorus (P): 0.045% max Sulfur (S): 0.030% max Pressure and Temperature Resistance: Operating Temperature: SS 321 can perform well in high-temperature environments, up to 900°C (1650°F) intermittently and up to around 700°C (1292°F) for continuous service. Design and Dimensions of DIN 2527 Blind Flanges: Pressure Ratings: The design of a DIN 2527 blind flange is primarily based on pressure class ratings (such as PN6, PN10, PN16, etc.), which denote the maximum pressure the flange can safely withstand. Bolt Holes: The number and size of bolt holes for DIN 2527 blind flanges are specified according to the flange's pressure class and size. The bolt pattern is designed to ensure a tight seal and accommodate appropriate bolt sizes for a given pressure class. Thickness: The thickness of a blind flange can vary depending on the pressure rating and size, with thicker flanges being required for higher pressure applications. Nominal Diameter: Blind flanges are available in various nominal pipe diameters (DN) ranging from DN10 (1/2 inch) up to DN600 (24 inches) or more. Types of DIN 2527 SS 321 Blind Flanges: Standard Blind Flange (Type A): A solid, circular flange used to seal the end of a pipe or vessel. Common for general applications. Flat-Faced Blind Flange: Has a flat sealing surface, ideal for low-pressure systems and tight sealing. Raised Face Blind Flange: Features a raised surface around the center for better sealing in higher pressure systems. Ring-Type Joint (RTJ) Blind Flange: Has a groove for an RTJ gasket, designed for high-pressure applications, often used in the oil and gas industry. Long Weld Neck Blind Flange: Has an extended neck for welding, providing additional strength and used in high-pressure or stressed systems.

A DIN 2527 AISI 4140 blind flange is a specialized type of blind flange made from AISI 4140 alloy steel, adhering to the DIN 2527 German standard. Blind flanges are crucial components in piping systems, used to seal the end of a pipe, vessel, or valve to isolate it or stop the flow of fluids. The AISI 4140 material used for this specific flange is a high-strength alloy steel known for its robustness and excellent mechanical properties, making it ideal for high-stress applications. AISI 4140, a chromium-molybdenum alloy steel, is renowned for its excellent mechanical properties, including high tensile strength, hardness, and resistance to wear. It is often used in heavy-duty applications such as in the automotive, aerospace, and oil & gas industries, where the need for robust materials is crucial. The use of AISI 4140 steel in a DIN 2527 blind flange ensures that the flange can handle high pressures, temperatures, and mechanical stresses without compromising on performance or safety. Material: AISI 4140 Alloy Steel Composition: AISI 4140 is a medium-carbon steel alloy that contains chromium (Cr) and molybdenum (Mo) as its primary alloying elements. These elements improve the steel's hardness, strength, and wear resistance. Key Properties: Strength: High tensile strength and yield strength, making it capable of withstanding high loads and stress in high-pressure applications. Toughness: Offers excellent toughness and impact resistance, making it suitable for challenging environments where forces are dynamic. Hardness: Can be heat-treated to achieve high hardness levels, providing resistance to wear and abrasion. Corrosion Resistance: While AISI 4140 is not as corrosion-resistant as stainless steel, it can still perform well in less corrosive environments with proper surface treatment (e.g., coatings or galvanizing). Design and Dimensions (DIN 2527) Shape: The blind flange is a flat, circular plate with no central hole. Its purpose is to seal the end of a pipe or vessel, effectively "closing" the pipeline or system. Bolt Holes: The flange has evenly spaced bolt holes around the perimeter, allowing it to be bolted securely to the corresponding flange or fitting in the system. These holes align with the bolt pattern of other components. Thickness: The flange thickness varies depending on the size, pressure class, and specific application requirements. It is designed to withstand internal pressure while providing a reliable seal. Pressure Rating: Flanges are typically rated according to pressure classes such as PN 6, PN 10, PN 16, PN 25, etc., indicating the maximum pressure the flange can safely handle without failure. Applications Pipeline Sealing: The primary function of a blind flange is to seal the open end of a pipeline, preventing the passage of fluids, gases, or other materials through the system. System Isolation: Blind flanges are used to isolate a section of the system for maintenance or repairs, allowing for safe disconnection of parts while maintaining system integrity. Pressure Containment: AISI 4140 blind flanges are also used in applications where maintaining pressure within a system is critical. The high strength and durability of AISI 4140 make it suitable for use in high-pressure environments. Types of Blind Flanges in DIN 2527 Raised Face (RF): The flange surface has a small raised area around the bolt circle to improve sealing when mated with a gasket. Flat Face (FF): The flange surface is level with the flange body, typically used with softer gaskets to create a seal. Ring Type Joint (RTJ): The flange may feature a groove to accommodate a metal ring gasket for high-pressure applications, providing a secure, reliable seal.

When considering Duplex Stainless Steel for DIN 2527 Blind Flanges, the material offers unique advantages over traditional stainless steels, combining the benefits of both austenitic and ferritic microstructures. Duplex Stainless Steel typically contains a higher percentage of chromium, molybdenum, and nitrogen, which significantly enhances its properties, especially for highly demanding and corrosive environments. Material: Duplex Stainless Steel Superior Corrosion Resistance: Duplex stainless steels (e.g., 2205 or 2507) offer outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, which makes them highly suitable for industries exposed to aggressive environments, such as offshore oil and gas, chemical processing, and marine industries. Strength: Duplex stainless steels have higher tensile strength than standard austenitic steels (such as 304 or 316), allowing the flange to perform under higher mechanical stress and pressure. The material is typically twice as strong as conventional 304 and 316 stainless steels. Temperature Resistance: Duplex materials offer good performance in high-temperature environments, although not as high as some alloys specifically designed for extreme heat (e.g., Inconel). They perform well in moderate to high-temperature applications. Resistance to Chloride Stress Corrosion Cracking (SCC): Duplex steels are particularly resistant to chloride-induced stress corrosion cracking, which is one of the key benefits in applications exposed to chloride-rich environments, such as seawater. Common types of duplex stainless steel blind flanges include: 1.4462 (F51): Standard duplex steel, offering good corrosion resistance and strength, used in chemical, oil & gas, and marine industries. 1.4410 (F53): Super duplex steel, with higher strength and better corrosion resistance, used in offshore and high-pressure applications. 1.4539 (Alloy 20): Highly resistant to acid and chloride environments, used in chemical processing and power generation. Design and Dimensions Shape: Blind flanges in DIN 2527, regardless of the material (Stainless Steel 316 or Duplex), are flat, round plates without a central hole, used to close off the ends of pipes or pressure vessels. Bolt Holes: Like other blind flanges, duplex flanges come with bolt holes for bolting the flange to a mating flanged component. The bolt holes' number and size depend on the flange's diameter and the pressure class. Thickness: The thickness varies according to the pressure rating (e.g., PN 6, PN 10, PN 16, PN 25). Thicker flanges are designed for higher-pressure applications to maintain a secure and tight seal. Pressure Rating: Duplex stainless steel blind flanges are often used in high-pressure environments due to their strength. The specific pressure ratings depend on the material grade (e.g., Duplex 2205, Super Duplex 2507), but they generally exhibit higher pressure resistance than austenitic stainless steels like 316. Types of Blind Flanges in DIN 2527 (Duplex) Raised Face (RF): A raised face provides a contact area for the gasket, enhancing the sealing performance when paired with a gasket. Flat Face (FF): The face of the flange is level with the surface, which is suitable for softer gaskets that offer a tight seal without excessive pressure. Ring Type Joint (RTJ): For high-pressure applications, Duplex stainless steel blind flanges can feature a groove for a metallic gasket. This design ensures a tight seal under extreme conditions, often used in offshore and chemical plant environments. Benefits of Duplex Stainless Steel Blind Flanges Cost-Efficiency: While Duplex steels can be more expensive than austenitic grades, they offer a better cost-to-performance ratio due to their enhanced durability and strength, leading to longer service life and reduced maintenance costs. Improved Mechanical Properties: Duplex steels' unique composition offers a blend of high tensile strength and excellent corrosion resistance, making them perfect for demanding environments where other materials might not perform as well.

DIN 2527 is a German standard that defines the dimensions, design, and tolerances for flanges, including blind flanges. Blind flanges made of stainless steel 316 are commonly used in piping systems to seal the ends of pipes, providing a secure and reliable closure. Here's a detailed description of DIN 2527 Stainless Steel 316 Blind Flanges: Material: Stainless Steel 316: This is a higher grade of stainless steel compared to 304, offering superior corrosion resistance. Stainless steel 316 contains molybdenum, which enhances its resistance to corrosion, particularly against chlorides, making it ideal for environments with higher risks of corrosion, such as seawater, chemicals, and marine environments. Corrosion Resistance: Stainless steel 316 has excellent resistance to a wide range of chemicals and industrial environments. Temperature Resistance: It can withstand higher temperatures compared to 304 stainless steel, making it suitable for high-temperature applications. Strength: Stainless steel 316 has slightly higher tensile strength compared to 304, offering added durability and structural integrity. Design and Dimensions: Shape: Blind flanges are flat, round plates with no center hole, used to seal the end of a pipe or pressure vessel. Bolt Holes: These flanges have bolt holes to align with bolts for connecting to other flanged components. The number and size of bolt holes depend on the diameter of the flange and the pressure class. Thickness: The thickness of DIN 2527 blind flanges varies depending on the pressure class (PN 6, PN 10, PN 16, PN 25, etc.). Thicker flanges can handle higher pressure ratings and provide a more secure seal. Pressure Rating: Similar to other flanges, the pressure rating for DIN 2527 blind flanges is important for determining the maximum pressure they can withstand without failure. Stainless steel 316 flanges can be designed to withstand high-pressure applications. Applications: Sealing: Blind flanges made of stainless steel 316 are used to seal the end of a pipeline or vessel to prevent fluid leakage, effectively creating a closed system. System Isolation: These flanges are used to isolate sections of a piping system for maintenance or modification, allowing for safe shutoff of pressure or fluid flow. High-Corrosion Environments: Due to the superior corrosion resistance of stainless steel 316, these blind flanges are used in industries where exposure to corrosive materials, saltwater, or harsh chemicals is a concern (e.g., chemical processing, marine, pharmaceutical, food processing). Types of Blind Flanges in DIN 2527: Raised Face (RF): The face of the flange is slightly raised to improve the sealing capability when paired with a gasket. Flat Face (FF): The face of the flange is level with the surface, often used with softer gaskets for a secure seal. Ring Type Joint (RTJ): For applications requiring high pressure, a ring-type joint may be used, which features a groove in the flange for a metallic gasket.