DIN 2634 Flange PN25 ASTM A105 / ASTM A182 F304 / ASTM A694 F52 Weld Neck Raised Face Flanges

DIN 2634 Carbon Steel and Stainless Steel Weld Neck Flanges WNRF PN25 for Industrial Purposes

Introduction:

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DIN weld neck flanges are a type of pipe flange that is designed to be butt-welded to the end of a pipe. They have a long tapered hub that gradually merges with the pipe, providing reinforcement and reducing stress concentrations. The flange is then bolted to another weld neck flange or a compatible flange using bolts or studs.

DIN standards are widely used in Europe, particularly in Germany, and DIN weld neck flanges conform to the specific dimensional and technical requirements set by DIN standards. These flanges are available in various materials such as carbon steel, stainless steel, and alloy steel, allowing them to be used in a wide range of applications in industries such as oil and gas, petrochemical, power generation, and more.

Description of DIN Weld Neck Flanges:

DIN weld neck flange is a type of flange that has a tapered hub or a high hub, which allows it to transfer stress from the flange to the pipes, reducing stress concentration at the base of the flange. It is commonly used in high-pressure and high-temperature applications.

There are two main designs of weld neck flanges. The first type has a shorter neck and is used with pipes, allowing the pipe to be inserted into the flange and welded to create a strong and leak-proof connection. The second type has a longer neck and is typically used in process plants where the flange is not directly connected to pipes but is instead used for connecting various equipment or components within the plant.

Weld neck flanges are usually made from forged materials, which provide strength and durability. The neck of the flange extends beyond the flange's circumference and has bolt holes drilled into it. These bolt holes allow the flange to be attached to another flange or equipment using bolts, creating a secure and sealed connection.

The design of weld neck flanges offers several advantages, including improved structural integrity and resistance to high pressures and temperatures. The welding of the flange to the pipe or equipment provides a strong and reliable joint, reducing the risk of leakage or failure in critical applications.

DIN 2634 Weld Neck Flange Dimensions:

1.Dimensions are in millimeters(mm).

2.Dimensions can be specified by different purchasers.

Materials of DIN Weld Neck Flanges:

DIN weld neck flanges are available in various materials to suit different applications and operating conditions. The material selection for DIN weld neck flanges depends on factors such as temperature, pressure, corrosion resistance, and compatibility with the conveyed fluid or gas.

Grades of Carbon Steel Weld Neck Flanges:

ASTM A105: This is a common grade of carbon steel used for weld neck flanges. It is a forged carbon steel specifically designed for high-temperature service and offers excellent weldability and toughness.

ASTM A350 LF2: LF2 is a low-temperature carbon steel grade commonly used for weld neck flanges in applications where low-temperature toughness is required.

ASTM A694 F52/F60/F65/F70: These grades are high-yield carbon steel materials used for weld neck flanges in applications requiring high strength and impact resistance.

Grades of Stainless Steel Weld Neck Flanges:

ASTM A182 F304/F304L: These grades of stainless steel are austenitic and commonly used for weld neck flanges. They offer good corrosion resistance, excellent weldability, and are suitable for a wide range of applications.

ASTM A182 F316/F316L: Similar to F304/F304L, these grades are also austenitic stainless steels with improved corrosion resistance, particularly in chloride environments.

ASTM A182 F321: F321 is an austenitic stainless steel grade containing titanium, which provides enhanced resistance to intergranular corrosion. It is often used for weld neck flanges in high-temperature applications.

ASTM A182 F347: F347 is a stabilized stainless steel grade with the addition of niobium, which improves its resistance to intergranular corrosion. It is commonly used for weld neck flanges in applications involving elevated temperatures.

When should Weld Neck Flanges be used:

Weld neck flanges should be used in the following situations:

High-Pressure Applications: Weld neck flanges are ideal for applications involving high pressure. The welded connection between the flange and the pipe provides a strong and leak-resistant joint that can withstand the forces exerted by high-pressure fluids or gases.

High-Vibration Environments: Weld neck flanges excel in applications with high vibration or mechanical stress. The welded connection offers added stability, reducing the risk of loosening or failure due to vibration-induced fatigue. This makes them suitable for piping systems in industries such as oil and gas, petrochemicals, and power generation.

Critical Systems: When a strong and reliable connection is crucial, such as in critical systems where safety and performance are paramount, weld neck flanges are the preferred choice. Their design and welding connection provide enhanced structural integrity, minimizing the risk of leaks or failures.

Extreme Temperatures: Weld neck flanges are capable of withstanding high temperatures. They are commonly used in applications where extreme temperature conditions are present, such as in power plants, refineries, or industrial processes involving heat transfer.

Demanding Environments: In environments where corrosion, chemical exposure, or abrasive substances are prevalent, weld neck flanges offer excellent resistance. By choosing the appropriate material, such as stainless steel or specialized alloys, they can withstand the harsh conditions and maintain their integrity over time.

Applications of DIN 2634 Weld Neck Flanges:

DIN 2634 weld neck flanges are specifically designed for use in specific applications where their unique characteristics are required. Here are some common applications of DIN 2634 weld neck flanges:

High-Pressure Systems: DIN 2634 weld neck flanges are often used in high-pressure systems, such as in oil and gas pipelines, chemical plants, and power generation facilities. Their robust construction and reliable sealing capabilities make them suitable for withstanding high pressures and preventing leaks.

High-Temperature Environments: These flanges are also commonly employed in applications where elevated temperatures are involved, such as in steam lines, heat exchangers, and thermal power plants. DIN 2628 weld neck flanges can withstand high temperatures without deformation or loss of integrity.

Petrochemical Industry: The petrochemical industry extensively uses DIN 2634 weld neck flanges due to their ability to handle corrosive fluids and gases. They are commonly used in refineries, chemical processing plants, and offshore platforms, where resistance to corrosion and durability are essential.

Pipelines: Weld neck flanges are commonly used in pipeline systems to connect pipes and provide a secure and leak-proof joint. DIN 2634 weld neck flanges are utilized in various pipeline applications, including oil and gas transmission pipelines, water and wastewater pipelines, and industrial piping systems.

Shipbuilding: Weld neck flanges, including DIN 2634, are prevalent in shipbuilding applications. They are used in various systems on ships, such as fuel and oil transfer lines, cooling systems, and hydraulic systems. The weld neck flanges provide a reliable connection that can withstand the demanding conditions at sea.

Food and Beverage Industry: DIN 2634 weld neck flanges made from stainless steel are suitable for applications in the food and beverage industry. They are used in processing equipment, such as tanks, pumps, and pipelines, where hygiene and corrosion resistance are critical.