EN1092-01 Stainless Weld Neck Flange TYPE 11 RFWN Flange PN 400 ASTM A182 304/306/316/317 Flange With Neck

EN1092-01 Stainless Weld Neck Flange TYPE 11 RFWN Flange PN 400 ASTM A182 304/306/316/317 Flange with Neck for Petroleum and Gas Industry

Introduction of EN1092-01 Weld Neck Flange:

What is Weld Neck Flange?

A weld neck flange, also referred to as a tapered hub flange or high-hub flange, serves to distribute stress evenly along the length of pipes, thereby minimizing stress concentrations at the base of the flange. There are two primary designs of weld neck flanges: one used for standard pipe connections, and another longer type commonly found in process plants where additional length isn't required.

Constructed typically from forged materials, weld neck flanges feature a circular fitting that extends beyond the flange's circumference. These flanges are welded directly onto pipes and are equipped with multiple bolt holes around the rim for secure attachment to another flange. This design enhances structural integrity and bolsters the strength of the joint.

EN1092-01 weld neck flanges are characterized by a lengthy tapered hub or neck that extends from the main flange body. This neck is designed for butt-welding directly to the pipe end, ensuring a robust and enduring connection. By distributing stress along the pipe's length, the weld neck design mitigates stress concentrations at the flange base, thereby optimizing the joint's overall structural reliability.

Specifications of EN1092-01 Weld Neck Flanges PN 400:

1.Dimensions are in millimeters(mm).

2. Dimensions can be specified by different purchasers.

What Materials Can We Provide?

Grades of Stainless Steel:

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.

Why We Choose Weld Neck Flanges?

Outstanding Characteristics of Weld Neck Flanges in the Applications:

Weld neck flanges are considered among the strongest types of flanges primarily due to their design features and the nature of their connection method.

Butt-Welded Connection: Weld neck flanges are welded directly to the pipe. The welding process involves fusing the neck of the flange to the pipe's end, creating a continuous and robust connection. This method ensures that the joint is integral and resistant to leakage under high-pressure conditions.

Tapered Hub Design: Weld neck flanges have a long, tapered hub or neck. This design provides several strength advantages:

Reduced Stress Concentration: The gradual taper distributes stress more evenly compared to flat or raised face flanges. This minimizes the risk of localized stress concentrations that could lead to fatigue or failure.

Enhanced Structural Integrity: The extended neck acts as a reinforcement, adding structural strength to the flange and the joint. It helps in bearing the load and resisting bending or deformation.

Smooth Transition: The smooth transition from the flange's neck to the pipe's bore improves flow characteristics within the piping system. This reduces turbulence and pressure drop, which can occur in other flange types with abrupt transitions.

Suitability for High-Pressure Applications: Due to their robust construction and welded connection, weld neck flanges are well-suited for applications requiring high pressure handling capabilities. They provide a secure and reliable sealing mechanism that withstands significant internal pressures without compromising integrity.

Longevity and Reliability: Weld neck flanges are known for their durability and long service life when properly installed and maintained. The welded joint eliminates potential weak points associated with bolted connections, such as gasket failures or bolt loosening over time.

Versatility: Weld neck flanges are available in various materials, sizes, and pressure ratings, making them versatile for a wide range of industrial applications where strong, leak-proof connections are essential.

Applications of Stainless Steel Weld Neck Flanges:

Stainless steel weld neck flanges are a common type of pipeline connection component made from carbon steel. They have many advantages, such as high strength, good corrosion resistance, and relatively low price. Stainless steel weld neck flanges are widely used in many different application areas, including the following:

Petroleum and gas industry: Stainless steel weld neck flanges are commonly used in pipeline systems for transporting oil and gas. These pipelines typically transport liquids or gases at high pressures and temperatures, so they require good pressure resistance and sealing performance. Stainless steel weld neck flanges can meet these requirements and are suitable for various oil and gas exploration, processing, and transportation environments.

Chemical industry: In the chemical industry, stainless steel weld neck flanges are widely used to connect pipelines in various chemical production and processing processes. These processes may involve corrosive media, high temperature, or high pressure conditions, so materials need to have good corrosion resistance and pressure resistance. The corrosion resistance of stainless steel weld neck flanges and their compatibility with other pipeline materials make them a common choice in the chemical industry.

Power plants: Stainless steel weld neck flanges are used in power plants to connect key equipment such as boilers, steam pipes, and cooling water systems. These systems typically face high temperature and pressure conditions and require reliable pipeline connections to ensure safe and efficient operation. Stainless steel weld neck flanges can meet these requirements and are widely used in thermal power plants, nuclear power plants, and other types of power plants.

Manufacturing industry: In the manufacturing industry, stainless steel weld neck flanges are commonly used to connect pipelines in various industrial equipment and machinery. These devices may include chemical equipment, food processing equipment, papermaking machinery, etc. Stainless steel weld neck flanges provide a reliable connection method, can withstand high pressures and temperatures, and meet the needs of the manufacturing process.