EN1092-01 Carbon Steel Flange Type 11 PN 40 3 Inch Weld Neck Flange Raised Face/WNRF Flange

EN1092-01 Carbon Steel Flange Welded to Pipe Type 11 PN 40 3 Inch Weld Neck Flange Raised Face/WNRF Flange for Industrial Pipelines

What are EN1092-01 Weld Neck Flanges?

Description of EN1092-01 Weld Neck Flanges:

A weld neck flange, often referred to as a welding neck flange, is highly esteemed for its elongated hub which provides robust mechanical strength, effectively resisting deformations like 'dishing' and 'bowing'. These flanges are renowned for their reliability and versatility, available in a comprehensive range of sizes and various face types including flat, raised, and RTJ (Ring Type Joint), across all pressure classes.

EN1092-01 establishes the standards for dimensions, materials, and technical specifications of weld neck flanges used in European industries. This standard ensures consistency and compatibility across different manufacturers and applications within the European Union. Weld neck flanges are fabricated from a variety of materials suitable for diverse environmental and operational conditions. Common materials encompass carbon steel, stainless steel (such as 304 and 316 grades), and alloy steel, chosen for their strength, corrosion resistance, and appropriateness for specific applications.

The hallmark feature of EN1092-01 weld neck flanges is their elongated, tapered hub that enhances mechanical strength and reduces stress concentrations at the flange base. Depending on the sealing requirements of the application, weld neck flanges may feature a flat face, raised face, or ring type joint (RTJ). The standard stipulates critical dimensions including outer diameter, bolt circle diameter, bolt hole diameter, and thickness, ensuring seamless compatibility with matching pipes and equipment connections. EN1092-01 categorizes flanges into distinct pressure classes (PN), ranging from PN6 to PN100, reflecting their capability to withstand varying pressure levels.

EN1092-01 Weld Neck Flange PN 40 Specifications:

1.Dimensions are in millimeters(mm).

2. Dimensions can be specified by different purchasers.

Materials of EN1092-01 Carbon Steel Weld Neck Flanges:

EN1092-01 carbon steel weld neck flanges are available in various materials to suit different applications and operating conditions. The material selection for EN1092-01 weld neck flanges depends on factors such as temperature, pressure, corrosion resistance, and compatibility with the conveyed fluid or gas.

Grades of Carbon Steel:

1.Q235: Q235 is a commonly used carbon structural steel grade specified in the Chinese national standard GB/T 700. It is often used in general engineering structures and manufacturing industries. In carbon steel flanges, Q235 material is commonly used for pipeline systems operating at low pressure, low temperature, and non-critical stress environments.

2.A105: A105 is a carbon steel material specified in the American ASTM standard, complying with ASTM A105/A105M requirements. A105 material has good weldability and mechanical properties, making it suitable for use in a wide temperature range from low to high temperatures. It is commonly used for pipeline systems and valve connections under high temperature and high-pressure conditions.

3.A350 LF2: A350 LF2 is also a carbon steel material specified in the ASTM standard, complying with ASTM A350/A350M requirements. LF2 indicates low-temperature service, and this material has good low-temperature toughness and crack resistance. It is commonly used for pipeline systems and valve connections under low-temperature conditions.

4.A694 F42/F52/F60/F65/F70: These material grades are specified in the ASTM A694 standard for carbon steel materials used in high-strength, low-temperature, or normal temperature high-pressure pipeline systems and valve connections. Different grades of materials have different strengths and corrosion resistance properties, suitable for various working conditions.

5.ASTM A181 Gr.1/Gr.2: These carbon steel flange material grades are suitable for pressure vessels, valves, and pipeline fittings under low pressure and low temperature conditions. They have good machinability and mechanical performance.

6.ASTM A516 Gr.70: Gr.70 is a commonly used medium carbon steel grade, known for its good weldability and machinability, suitable for manufacturing flanges and pipe fittings, among others.

7.A216 WCB: A216 WCB is a carbon steel casting material specified in the American ASTM standard, complying with ASTM A216/A216M requirements. WCB stands for cast carbon steel, and it is commonly used for carbon steel flanges that require casting in general engineering structures and manufacturing industries.

How Weld Neck Flange Works in the Applications:

Connection and Welding: The weld neck flange has a long, tapered neck that is welded to the pipe. This weld ensures a strong, permanent connection between the flange and the pipe, capable of withstanding high pressures and temperatures. The welding process typically involves a full penetration weld, which means the weld metal extends through the thickness of the neck and the pipe, ensuring a continuous and leak-proof joint.

Smooth Flow Path: The inside diameter of the weld neck flange matches that of the pipe it is connected to. This alignment creates a smooth transition from the pipe to the flange, maintaining a constant cross-section with minimal disruption to the flow of gases or liquids. Unlike slip-on flanges or lap joint flanges, which may cause turbulence due to their design, weld neck flanges provide a streamlined flow path without interruptions.

Strength and Durability: The design of a weld neck flange, with its long neck and gradual taper, provides mechanical strength and reduces stress concentrations. This configuration minimizes the risk of flange deformation under high pressure or thermal loads. The welded connection ensures stability and prevents loosening or detachment during operation.

Sealing: Depending on the application requirements, weld neck flanges can be equipped with a flat face, raised face, or ring type joint (RTJ) sealing surface. This ensures effective sealing against leakage when paired with compatible gaskets and bolted properly.

Versatility: Weld neck flanges are available in various materials and pressure ratings (PN), making them suitable for a wide range of industrial applications. They are commonly used in piping systems handling fluids or gases where reliability, leak resistance, and smooth flow are critical.

Applications of Carbon Steel Weld Neck Flanges:

Carbon 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. Carbon steel weld neck flanges are widely used in many different application areas, including the following:

Petroleum and gas industry: Carbon 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. Carbon 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, carbon 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 carbon steel weld neck flanges and their compatibility with other pipeline materials make them a common choice in the chemical industry.

Power plants: Carbon 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. Carbon 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, carbon 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. Carbon steel weld neck flanges provide a reliable connection method, can withstand high pressures and temperatures, and meet the needs of the manufacturing process.