DIN 2527 Carbon Steel (C.S.) Blind Flanges are designed to seal the ends of pipes or vessels in industrial piping systems where no further connection is required. These blind flanges are made from carbon steel, which is known for its strength, durability, and cost-effectiveness. The DIN 2527 standard ensures that these flanges meet precise dimensional and mechanical requirements for reliability under various industrial conditions. Material Composition of Carbon Steel (C.S.) Blind Flanges: The material used in DIN 2527 carbon steel blind flanges typically includes carbon steel grades like St 37, St 52, or A105, which are commonly used for pressure-containing parts in piping systems. The general composition of carbon steel includes: Carbon (C): 0.05% to 0.25% – Provides strength and hardness. Manganese (Mn): 0.30% to 0.90% – Enhances toughness and strength. Silicon (Si): 0.10% to 0.60% – Adds strength and hardness. Phosphorus (P): Up to 0.04% – Ensures better toughness and workability. Sulfur (S): Up to 0.05% – Keeps the material ductile and machinable. Iron (Fe): The remainder of the material – Makes up the base composition. These carbon steel grades provide excellent mechanical properties, such as strength, ductility, and weldability, making them suitable for a wide range of applications in moderate temperature and pressure environments. Key Features of DIN 2527 Carbon Steel Blind Flanges: Temperature and Pressure Resistance: Operating Temperature: Carbon steel can withstand temperatures up to 400°C (752°F) without significant degradation. It is ideal for moderate temperature applications. Pressure Tolerance: DIN 2527 carbon steel blind flanges come with pressure ratings such as PN6, PN10, PN16, PN25, and higher, ensuring they can safely handle pressure in piping systems. Corrosion Resistance: Carbon steel is not highly resistant to corrosion, especially in moisture, chlorides, or acidic environments. To enhance the corrosion resistance, these flanges can be galvanized or coated (with zinc or paint), which helps in increasing their durability in mildly corrosive environments. Strength and Durability: Carbon steel offers high strength and good toughness under moderate stress and pressure conditions. It is stronger than mild steel, providing a reliable seal for general industrial use. Dimensional Accuracy and Pressure Class: The DIN 2527 standard ensures precise dimensional accuracy, enabling easy and reliable installation. Carbon steel blind flanges come in different pressure ratings like PN6, PN10, PN16, and PN25, providing flexibility based on the system's pressure requirements. Design and Types of DIN 2527 Carbon Steel Blind Flanges: Standard Blind Flange (Type A): A solid circular flange used for general isolation of pipeline sections where no further connection is needed. Flat-Faced Blind Flange: This flange features a flat sealing surface, making it suitable for low-pressure systems or applications where a tight seal is not required. Raised Face Blind Flange: Has a raised surface for a better seal in medium-to-high-pressure systems, where the flange is bolted to a matching raised face of another flange. Ring-Type Joint (RTJ) Blind Flange: Used in high-pressure systems, this flange has a groove that holds an RTJ gasket, offering a superior seal under high-pressure conditions. Long Weld Neck Blind Flange: Features an extended neck for welding to the pipe, providing additional strength and making it suitable for high-pressure or high-stress applications. Nominal Diameter: Available in a wide range of nominal diameters (e.g., DN10, DN50, DN150, DN600), ensuring compatibility with different pipe sizes and system requirements.

DIN 2527 Mild Steel Blind Flanges are specialized components designed to seal the ends of pipes or vessels in industrial piping systems where no further connection is required. These flanges, made from mild steel, are used in a wide range of applications due to the material's strength, cost-effectiveness, and ease of fabrication. The DIN 2527 standard ensures that these flanges meet the highest specifications for dimensional accuracy, pressure tolerance, and mechanical strength, making them ideal for general-purpose sealing in various industries. Material Composition of Mild Steel (MS) Flanges: Mild steel, or low-carbon steel, is commonly used for manufacturing DIN 2527 blind flanges. The composition of mild steel typically includes: Carbon (C): 0.05% to 0.25% – Provides strength while ensuring ductility and ease of welding. Manganese (Mn): 0.30% to 0.90% – Enhances strength and hardenability. Silicon (Si): 0.10% to 0.60% – Contributes to deoxidation and strength. Phosphorus (P): Up to 0.04% – Low phosphorus content ensures better toughness. Sulfur (S): Up to 0.05% – Low sulfur content to avoid brittleness. Iron (Fe): The remaining composition – Mild steel is primarily iron. This composition provides a cost-effective material with good weldability, formability, and mechanical properties for most non-corrosive applications. Key Features of DIN 2527 Mild Steel Blind Flanges: Temperature and Pressure Resistance: Operating Temperature: While mild steel doesn't handle extreme temperatures as well as superalloys like Inconel, it is suitable for moderate temperature environments where temperatures do not exceed around 300°C (572°F). Pressure Tolerance: DIN 2527 mild steel blind flanges are available in standard pressure ratings, such as PN6, PN10, PN16, and higher pressure classes depending on the application. These pressure ratings ensure the flanges are safe and durable under normal industrial pressures. Dimensional Accuracy and Pressure Class: The DIN 2527 standard ensures precise dimensional accuracy of mild steel blind flanges, making them easy to install in piping systems. These flanges are available in various sizes and thicknesses, with flanges designed to meet specific pressure classes such as PN6, PN10, PN16, PN25, and PN40, depending on the application. Design and Types of DIN 2527 Mild Steel Blind Flanges: Standard Blind Flange (Type A): A solid, circular flange ideal for general applications where no further connection is required. It provides a simple and reliable seal for pipeline isolation. Flat-Faced Blind Flange: Features a flat sealing surface, suitable for low-pressure systems or applications with minimal sealing requirements. It is typically used in systems where the flange is bolted directly to a flat mating surface. Raised Face Blind Flange: Has a raised surface to improve sealing performance under higher pressure applications. This type ensures a tighter seal and is ideal for medium-to-high-pressure systems. Ring-Type Joint (RTJ) Blind Flange: Designed for high-pressure systems, it has a groove that holds an RTJ gasket. This design ensures a high-pressure seal and is often used in critical applications where pressure integrity is essential. Long Weld Neck Blind Flange: Features an extended neck for welding to the pipe, offering additional strength and stability. It is used in high-pressure or stressed systems that require the flange to be securely welded to the pipeline. Nominal Diameter: Available in a wide range of nominal diameters (e.g., DN10, DN50, DN150, DN600, DN1000), to accommodate different pipe sizes and system requirements.

DIN 2527 SS P.H. (Precipitation Hardening) Blind Flanges are designed for use in high-performance piping systems that require robust sealing solutions. Made from precipitation-hardening stainless steel alloys, these flanges combine high strength, excellent corrosion resistance, and the ability to withstand elevated temperatures. Manufactured to meet the DIN 2527 standard, these flanges ensure dimensional accuracy, high pressure tolerance, and superior mechanical performance, making them ideal for demanding applications in industries such as chemical processing, aerospace, and power generation. Material Composition of Precipitation Hardening Stainless Steel (SS P.H.): Precipitation-hardening stainless steels are a family of alloys known for their ability to achieve high strength through heat treatment. Grade 17-4 PH: Chromium (Cr): 15.0% - 17.5% Nickel (Ni): 3.0% - 5.0% Copper (Cu): 3.0% - 5.0% Iron (Fe): Balance Manganese (Mn): 1.0% max Silicon (Si): 1.0% max Carbon (C): ≤ 0.07% Phosphorus (P): ≤ 0.04% Sulfur (S): ≤ 0.03% Grade 15-5 PH: Chromium (Cr): 14.0% - 15.5% Nickel (Ni): 3.5% - 5.5% Copper (Cu): 2.5% - 4.5% Iron (Fe): Balance Manganese (Mn): 1.0% max Silicon (Si): 1.0% max Carbon (C): ≤ 0.07% Phosphorus (P): ≤ 0.04% Sulfur (S): ≤ 0.03% Key Features of DIN 2527 SS P.H. Blind Flanges: High Strength: Precipitation-hardened stainless steels, such as 17-4 PH and 15-5 PH, are known for their high tensile strength and hardness. Corrosion Resistance: Stainless steel, especially in the precipitation-hardened grades, offers excellent resistance to corrosion, including resistance to pitting, crevice corrosion, and stress corrosion cracking in both aqueous and high-temperature environments High-Temperature Performance: SS P.H. Blind Flanges can withstand high temperatures, making them suitable for use in applications that involve elevated temperatures (up to 600°C or 1100°F), such as chemical reactors, power plants, and aerospace systems. Dimensional Accuracy & Pressure Ratings: These flanges are manufactured to precise DIN 2527 standards to ensure tight seals and correct fitment in piping systems. They are available in multiple pressure classes such as PN6, PN10, and PN16, which denote the maximum pressure the flange can safely withstand. Design Options: Standard Blind Flange (Type A): A solid, circular flange used to seal the end of a pipe or vessel, suitable for general applications. Flat-Faced Blind Flange: Features a flat sealing surface for low-pressure applications, ideal for ensuring a tight seal in systems with low pressure. Raised Face Blind Flange: Has a raised area around the center, providing enhanced sealing for higher-pressure applications. Ring-Type Joint (RTJ) Blind Flange: Designed with a groove for a ring-type joint gasket, used in high-pressure systems such as oil and gas pipelines. Long Weld Neck Blind Flange: Equipped with an extended neck for welding, offering additional strength and support in high-pressure or stressed systems. Nominal Diameter: DIN 2527 SS P.H. Blind Flanges are available in various nominal diameters (DN), ranging from DN10 (1/2 inch) up to DN600 (24 inches) or larger, ensuring compatibility with a wide range of piping systems and applications.

DIN 2527 Titanium Grade 5 Blind Flanges are premium-quality sealing components designed to close off the open ends of pipes, vessels, or equipment in systems where no further connection is needed. Made from Titanium Grade 5 (Ti-6Al-4V), these flanges are known for their superior strength, excellent corrosion resistance, and lightweight properties. Titanium Grade 5 is an alloy composed of titanium, aluminum, and vanadium, making it stronger and more heat-resistant than commercially pure titanium (Grade 2). These flanges adhere to the DIN 2527 standard, ensuring that they meet the precise requirements for dimensional accuracy, pressure tolerance, and mechanical performance. Material Composition of Titanium Grade 5 (Ti-6Al-4V): Titanium Grade 5, also known as Ti-6Al-4V, is composed of the following elements: Titanium (Ti): 90.0% min Aluminum (Al): 6.0% - 7.0% Vanadium (V): 3.5% - 4.5% Iron (Fe): 0.25% max Oxygen (O): 0.20% max Carbon (C): 0.10% max Nitrogen (N): 0.05% max Hydrogen (H): 0.015% max Titanium Grade 5 is one of the most widely used titanium alloys due to its high strength, resistance to corrosion, and ability to withstand elevated temperatures, making it suitable for high-performance applications. Key Features of DIN 2527 Titanium Grade 5 Blind Flanges: Superior Strength: Titanium Grade 5 offers high strength (approximately 130 ksi tensile strength) while maintaining its light weight, making it suitable for demanding applications where both strength and low mass are important, such as in aerospace and military systems. Corrosion Resistance: Titanium Grade 5 exhibits exceptional corrosion resistance, particularly against chlorides, seawater, and acidic environments. It is highly resistant to pitting, crevice corrosion, and stress corrosion cracking. It performs well in the presence of strong acids like sulfuric and hydrochloric acids, making it suitable for chemical processing systems, offshore, and marine applications. Temperature Resistance: Titanium Grade 5 can withstand elevated temperatures, with a continuous operating temperature up to 400°C (752°F) and intermittent exposure to higher temperatures. This makes it suitable for high-temperature applications in aerospace, power generation, and chemical industries. Light Weight: Titanium alloys, including Grade 5, have a very low density, approximately 60% of that of steel, making them an excellent choice for applications where weight reduction is a priority, such as in the aerospace and automotive industries. Dimensional Accuracy & Pressure Ratings: DIN 2527 Titanium Grade 5 Blind Flanges are manufactured to exacting standards to ensure a tight, secure seal in piping systems. Available in various pressure classes such as PN6, PN10, and PN16, allowing compatibility with a range of piping systems depending on the pressure requirements. Design Options: Standard Blind Flange (Type A): A solid, circular flange used to seal the end of a pipe or vessel. Flat-Faced Blind Flange: Designed with a flat sealing surface for low-pressure systems. Raised Face Blind Flange: Features a raised area around the center for improved sealing in higher pressure applications. Ring-Type Joint (RTJ) Blind Flange: Designed for high-pressure applications with a groove for a ring-type joint gasket, commonly used in the oil and gas industries. Long Weld Neck Blind Flange: Includes an extended neck for welding, providing additional strength in high-pressure or stressed systems. Nominal Diameter: DIN 2527 Titanium Grade 5 Blind Flanges are available in a variety of nominal diameters (DN), ranging from DN10 (1/2 inch) up to DN600 (24 inches) or larger, depending on system requirements.

DIN 2527 Titanium Grade 2 Blind Flanges are specialized sealing components designed to close the open ends of pipes, vessels, or equipment in systems where no further connections are required. Made from Titanium Grade 2, these flanges are renowned for their excellent corrosion resistance, high strength, and light weight. Titanium Grade 2 is the most commonly used commercially pure titanium, offering a great combination of strength and durability for a wide range of industrial applications. The DIN 2527 standard ensures that these flanges meet precise dimensional, pressure, and mechanical requirements. Material Composition of Titanium Grade 2: Titanium Grade 2 (commercially pure titanium) is primarily composed of the following elements: Titanium (Ti): 99.2% min Iron (Fe): 0.30% max Oxygen (O): 0.25% max Carbon (C): 0.08% max Nitrogen (N): 0.03% max Hydrogen (H): 0.015% max Titanium Grade 2 is known for its outstanding combination of strength, ductility, and resistance to corrosion, making it suitable for a wide variety of industrial uses, especially in environments where high corrosion resistance is critical. Key Features of DIN 2527 Titanium Grade 2 Blind Flanges: Corrosion Resistance: Titanium Grade 2 is highly resistant to corrosion, particularly in environments that are exposed to chloride ions, seawater, and acidic conditions. It offers exceptional protection against pitting, crevice corrosion, and stress corrosion cracking. These flanges are ideal for use in applications involving harsh chemicals, acids, and marine environments, including seawater pipelines, desalination plants, and chemical processing systems. Strength and Durability: While Titanium Grade 2 is not as strong as titanium alloys with added elements like aluminum and vanadium (e.g., Grade 5), it still offers excellent strength-to-weight ratio, especially in terms of tensile strength and resistance to deformation under stress. It retains its strength even at elevated temperatures, making it reliable in systems exposed to thermal cycling and fluctuating temperatures. Temperature Resistance: Titanium Grade 2 maintains its performance at temperatures up to 400°C (752°F), providing stability and durability in environments with moderate to high temperatures. This makes it suitable for a wide range of industrial applications. Dimensional Accuracy and Pressure Ratings: DIN 2527 Titanium Grade 2 Blind Flanges are produced to precise specifications, ensuring accurate dimensions for a secure and reliable seal. These flanges are available in various pressure classes such as PN6, PN10, and PN16, depending on the requirements of the piping system. Design Variations: Standard Blind Flange (Type A): A solid, circular flange used to completely seal the end of a pipe or vessel. Flat-Faced Blind Flange: Designed with a flat sealing surface, ideal for low-pressure systems where a tight seal is required. Raised Face Blind Flange: Features a raised center portion to improve sealing capabilities in higher pressure systems. Ring-Type Joint (RTJ) Blind Flange: Incorporates a groove for a ring-type joint gasket, typically used in high-pressure and critical applications such as oil and gas pipelines. Long Weld Neck Blind Flange: Has an extended neck, offering additional strength, particularly useful in high-stress or high-pressure environments. Nominal Diameter: DIN 2527 Titanium Grade 2 Blind Flanges come in various nominal diameters (DN), ranging from DN10 (1/2 inch) up to DN600 (24 inches) or larger, depending on the system requirements.

DIN 2527 Titanium Blind Flanges are specialized components used to seal the open ends of pipes, vessels, or other equipment in industrial systems where no further connection is required. Made from Titanium alloys, these flanges offer a combination of high strength, excellent corrosion resistance, and light weight, making them an ideal choice for applications in demanding environments. Manufactured according to the DIN 2527 standard, these flanges ensure high levels of dimensional accuracy, pressure tolerance, and mechanical strength, which are critical for maintaining the integrity of piping systems. Material Composition of Titanium Alloys: Titanium alloys used for DIN 2527 Blind Flanges typically include: Grade 2 Titanium (Commercially Pure Titanium): Titanium (Ti): 99.2% min Iron (Fe): 0.30% max Oxygen (O): 0.25% max Carbon (C): 0.08% max Nitrogen (N): 0.03% max Hydrogen (H): 0.015% max Grade 5 Titanium (Ti-6Al-4V): Titanium (Ti): 90.0% min Aluminum (Al): 6.0% - 7.0% Vanadium (V): 3.5% - 4.5% Iron (Fe): 0.25% max Oxygen (O): 0.20% max Carbon (C): 0.10% max Nitrogen (N): 0.05% max Hydrogen (H): 0.015% max Key Features of DIN 2527 Titanium Blind Flanges: Corrosion Resistance: Titanium is highly resistant to corrosion, especially in chloride, seawater, and acidic environments, making Titanium Blind Flanges ideal for use in marine, chemical, and offshore applications. Titanium alloys offer superior resistance to pitting, crevice corrosion, and stress corrosion cracking, even in extreme environments like high salinity and acidic conditions. High Strength-to-Weight Ratio: Titanium has an excellent strength-to-weight ratio, making it significantly stronger than many steel alloys while being much lighter. This is particularly beneficial in industries where weight reduction is essential, such as aerospace and marine industries. Temperature Resistance: Titanium alloys can withstand high temperatures, with Grade 2 Titanium performing well at up to 400°C (752°F) and Grade 5 Titanium being suitable for continuous service at up to 400°C (752°F) as well, with intermittent exposure to even higher temperatures. Dimensional Accuracy and Pressure Class: DIN 2527 Titanium Blind Flanges are manufactured to precise dimensions, ensuring a secure seal within the piping system. Available in different pressure classes such as PN6, PN10, PN16, etc., ensuring compatibility with a wide range of piping systems. Design Options: Standard Blind Flange (Type A): A solid, circular disc used to seal the end of a pipe or vessel. Commonly used in general applications. Flat-Faced Blind Flange: Features a flat sealing surface, ideal for low-pressure systems. Raised Face Blind Flange: Includes a raised area around the center for improved sealing in higher pressure systems. Ring-Type Joint (RTJ) Blind Flange: Designed with a groove to accommodate a ring-type joint gasket, used for high-pressure applications, particularly in the oil and gas industry. Long Weld Neck Blind Flange: Features an extended neck for welding, providing additional strength and stability, commonly used in high-pressure or high-stress systems. Nominal Diameter: DIN 2527 Titanium Blind Flanges are available in a variety of nominal diameters (DN), typically ranging from DN10 (1/2 inch) up to DN600 (24 inches) or more, based on the application needs.

DIN 2527 Inconel Blind Flanges are specialized components designed to close off the ends of pipes or vessels in industrial piping systems, where no further connection is required. These blind flanges are made from Inconel alloys, a family of high-performance superalloys, known for their outstanding strength, resistance to high temperatures, and corrosion resistance in aggressive environments. The DIN 2527 standard ensures that these flanges meet the highest specifications for dimensional accuracy, pressure tolerance, and mechanical strength. Material Composition of Inconel Alloys: The primary materials used in the production of DIN 2527 Inconel Blind Flanges include Inconel 600, Inconel 625, and Inconel 718, each offering specific advantages depending on the application: Inconel 600 (Ni 72%, Cr 15%): Known for excellent resistance to oxidation and corrosion in high-temperature environments. Inconel 625 (Ni 58%, Cr 21%, Mo 9%): Offers superior resistance to pitting, stress corrosion cracking, and oxidation. Inconel 718 (Ni 50%, Cr 19%, Mo 3%, Nb 5%): Known for high strength and excellent fatigue and thermal-fatigue strength. These alloys provide superior resistance to a wide range of harsh environments, such as high-temperature oxidation, sulfuric and phosphoric acid corrosion, and chloride-induced stress corrosion cracking. Key Features of DIN 2527 Inconel Blind Flanges: Temperature and Pressure Resistance: Operating Temperature: Inconel alloys can withstand extremely high temperatures, with Inconel 600 handling temperatures up to 1093°C (2000°F), Inconel 625 up to 982°C (1800°F), and Inconel 718 capable of continuous operation at temperatures of up to 700°C (1292°F). Pressure Tolerance: Designed to endure elevated pressures, with pressure ratings available in PN6, PN10, PN16, and other standard pressure classes, ensuring safety under extreme operating conditions. Corrosion Resistance: Exceptional resistance to oxidation, scaling, and various forms of corrosion, particularly in high-temperature environments. Inconel 625 is particularly effective in marine and chemical processing environments due to its resistance to pitting and crevice corrosion. Strength and Durability: Inconel alloys exhibit outstanding mechanical strength, even at high temperatures, ensuring the structural integrity of piping systems under stress. The DIN 2527 standard defines the dimensions and design to accommodate high-stress conditions, making these flanges essential in demanding industries. Dimensional Accuracy and Pressure Class: DIN 2527 ensures precise dimensional accuracy, allowing for effective sealing and easy installation in piping systems. Available in various sizes and thicknesses, with flanges designed to meet specific pressure classes like PN6, PN10, and PN16, depending on the application. Design and Types: Standard Blind Flange (Type A): A solid, circular flange ideal for general applications. Flat-Faced Blind Flange: Features a flat sealing surface, suitable for low-pressure systems. Raised Face Blind Flange: Has a raised surface for improved sealing in higher pressure applications. Ring-Type Joint (RTJ) Blind Flange: Designed for high-pressure applications, with a groove for an RTJ gasket. Long Weld Neck Blind Flange: Offers added strength with an extended neck for welding, often used in high-pressure or stressed systems. Nominal Diameter: Available in a wide range of nominal diameters, typically from DN10 (1/2 inch) up to DN600 (24 inches) or more, to accommodate different pipe sizes and system requirements.

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.