BS4504 Stainless Steel Blind Flange 6 Inch PN2.5 A182 F304/304L F316/316L Flange BLRF for Industrial Pipelines

Introduction of BS4504 Blind Flanges:

Blind flanges, often referred to as BL flanges, are widely employed across industries dealing with piping systems. They are available in various face types (RTJ, Raised, and Flat Face) and pressure ratings. While inserting a blind flange between two flanges to obstruct flow is generally discouraged, a spectacle blind serves this purpose by temporarily halting flow within a pipe. In scenarios where accidental valve openings could occur, blind flanges are installed at pipe ends to ensure process fluid containment and prevent any undesired leakage.

The BS4504 Stainless Steel Blind Flange is a circular plate with perforations situated around the central hole. Its primary function is to seal the ends of pipe systems or openings in pressure vessels. When using a stainless steel blind flange, it becomes straightforward to access the interior of a pipe or vessel after it has been closed and needs reopening.

The utilization of BS4504 stainless steel blind flanges is crucial for maintaining and repairing pipelines. Without them, halting flow at the nearest valve, potentially located miles away from the repair site, would pose significant challenges. Valves are costly and susceptible to sticking, making blind flanges a more economical choice for sealing pipes. Industries such as petrochemicals, pipe engineering, public services, and water treatment commonly rely on blind flanges.

BS4504 stainless steel blind flanges are solid components used for securely terminating pipe systems or valves where line closure is necessary. These flanges lack a bore, ensuring a secure termination of the piping system.

Due to the strength and durability of stainless steel, BS4504 blind flanges are well-suited for high-pressure or high-temperature applications. They are available in various sizes and pressure ratings to meet diverse piping system requirements and are often paired with valves and fittings to create a secure and sealed endpoint.

Compared to other flange types, BS4504 stainless steel blind flanges have a simpler construction, requiring less mechanical machining. They tend to be heavier due to their solid design without a bore. While typically supplied as blanks for accommodating slip-on and weld neck flanges, custom machining options are available, such as center machining for NPT threads or custom bore sizes to function as slip-on flanges without a hub.

When paired with the appropriate gasket, BS4504 stainless steel blind flanges provide a reliable sealing solution for terminating or temporarily sealing piping systems. Their bolted design allows for easy access during maintenance, inspection, or future expansions, while the gasket ensures a tight seal by filling the gap between the flange faces, effectively preventing leaks.

Specifications of BS4504 Blind Flanges:

BS 4504 CODE 105 FLANGES DIMENSIONS:

1.Dimensions are in millimeters(mm).

2.Dimensions can be specified by different purchasers.

Grades of Stainless Steel Blind Flanges:

Stainless Steel Blind Flanges specified by ASTM A182 are widely used in various industries. These flanges are designed to slip over the pipe and are welded both inside and outside to provide a secure and leak-proof connection. The material grades F304, F304L, F316, F316L, and F304H denote specific types of stainless steel, each with unique properties suited for different applications.

ASTM A182 F304:

Composition: Austenitic stainless steel with a nominal composition of 18% chromium and 8% nickel.

Properties: Good corrosion resistance, weldability, and formability. Suitable for general-purpose applications.

ASTM A182 F304L:

Composition: Similar to F304 but with a lower carbon content (max 0.03%).

Properties: Enhanced resistance to intergranular corrosion after welding. Ideal for applications requiring post-weld heat treatment.

ASTM A182 F316:

Composition: Contains 16% chromium, 10% nickel, and 2% molybdenum.

Properties: Superior corrosion resistance, especially against chlorides and other industrial solvents. Suitable for more aggressive environments.

ASTM A182 F316L:

Composition: Similar to F316 but with lower carbon content (max 0.03%).

Properties: Improved resistance to intergranular corrosion. Preferred for welding operations where post-weld annealing is not possible.

ASTM A182 F304H:

Composition: Similar to F304 but with a higher carbon content (0.04%-0.10%).

Properties: Improved high-temperature strength and creep resistance. Suitable for high-temperature applications.

Why We Choose Blind Flanges in the Applications:

Blind flanges are chosen for industrial applications due to their numerous advantages in piping systems:

Leakage and Contamination Protection: Blind flanges effectively seal off the ends of pipes, valves, vessels, or tanks, preventing leaks and contamination. This ensures the safety and integrity of the system by maintaining a tight seal.

Versatility in Applications: They are widely used across diverse industries such as petrochemical plants, water treatment facilities, oil refineries, and public infrastructure. Blind flanges can seal off pipe ends in various systems, adapting to different operational requirements.

Easy and Quick Installation: Installing blind flanges is straightforward, requiring minimal tools and expertise. Their round plate design with pre-drilled bolt holes facilitates fast installation, saving time and reducing labor costs during piping system assembly or maintenance.

Durability and Longevity: Constructed from robust materials like stainless steel or carbon steel, blind flanges offer durability and long-lasting performance. They can withstand high-pressure conditions and harsh environments, ensuring reliability without compromising system integrity.

Blind flanges provide reliable sealing, versatility, ease of installation, and durability, making them indispensable in piping systems. They help maintain system integrity by preventing leaks and facilitating efficient maintenance and repairs, contributing to overall operational efficiency and safety.

Applications of BS4504 Stainless Steel Blind Flanges:

BS4504 Stainless Steel Blind Flanges have various applications across different industries and piping systems. Some common applications of these blind flanges include:

Oil and Gas Industry: BS4504 Stainless Steel Blind Flanges are widely used in the oil and gas industry for both upstream and downstream applications. They are employed in pipelines, refineries, offshore platforms, and petrochemical plants to cap off or terminate pipelines, valves, or equipment.

Power Generation: BS4504 Stainless Steel Blind Flanges are utilized in power plants, including thermal power plants and nuclear power plants. They are used to seal off pipes, valves, and equipment in steam, water, or gas systems.

Chemical Processing: BS4504 Stainless Steel Blind Flanges find applications in chemical processing plants, where they are used to close off pipelines that transport corrosive or hazardous chemicals. They provide a secure and leak-proof seal, ensuring the safety and integrity of the process.

Water and Wastewater Treatment: BS4504 Stainless Steel Blind Flanges are employed in water treatment plants, sewage treatment plants, and desalination facilities. They are used to cap off or terminate pipes and equipment for water distribution, filtration, and treatment processes.

HVAC Systems: BS4504 Stainless Steel Blind Flanges are utilized in heating, ventilation, and air conditioning (HVAC) systems. They provide closure points for pipes, ductwork, and equipment, ensuring proper airflow and system functionality.

Industrial Process Piping: BS4504 Stainless Steel Blind Flanges are commonly used in various industrial process piping systems, including manufacturing plants, pulp and paper mills, food processing facilities, and pharmaceutical plants. They are used to terminate or close off pipelines, tanks, and vessels.