EN1092-01 6 Inch Weld Neck Flanges Weld Neck Raised Face ASTM A105 Carbon Steel PN 10 For Pipeline

EN1092-01 6 Inch Weld Neck Flanges Weld Neck Raised Face ASTM A105 Carbon Steel Weld Neck Flanges PN 10 in the Pipeline Systems

Description of EN1092-01 Weld Neck Flanges:

The EN1092-01 weld neck flange is widely acclaimed as the most popular type due to its extended neck and weld bevel at the end, specifically designed for direct butt welding to pipes. It offers a seamless and robust connection, particularly favored in applications involving larger sizes and higher pressure classes.

If there were only one type of bored flange available in modern applications, the EN1092-01 weld neck flange would undoubtedly be the preferred choice. Its exceptional features and benefits make it highly desirable. The extended neck enhances strength and durability, ensuring reliability even under high-pressure conditions. Moreover, the weld connection guarantees a secure and leak-proof joint, further bolstering its dependability.

The tapered neck design of the weld neck flange evenly distributes stress across the flange and pipe, minimizing the risk of localized stress concentration and potential failure. The smooth transition from the flange's neck to the pipe's bore improves flow characteristics, reducing turbulence and pressure drop within the system.

Additionally, the extended neck facilitates easier inspection and maintenance activities such as visual inspections, cleaning, and repairs, enhancing the practicality and accessibility of the weld neck flange.

In critical applications such as oil and gas pipelines, refineries, chemical plants, and power generation facilities, the weld neck flange is favored for its ability to provide a strong, reliable, and efficient connection. However, it's important to consider specific application requirements such as temperature, pressure, and fluid compatibility when selecting the most suitable flange type.

Specifications of EN1092-01 Weld Neck Flanges:

1.Dimensions are in millimeters(mm).

2.Dimensions can be specified by different purchasers.

What Kind of Materials We Provide to Our Customers?

Grades of Carbon Steel Weld Neck Flanges:

weld neck flanges are available in various materials to suit different applications and operating conditions. The material selection for 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.

Advantages and Disadvantages of Weld Neck Flanges in the Situation:

• Advantages of Weld Neck Flanges:

Strength and Durability: Weld neck flanges offer high strength and durability due to their design, making them suitable for high-pressure and high-temperature applications.

Leak Resistance: The welded connection between the flange and pipe ensures a robust and leak-proof joint, reducing the risk of fluid or gas leakage.

Reduced Stress Concentration: The smooth taper of the neck reduces stress concentration at the base of the flange, enhancing the overall structural integrity.

Smooth Flow Characteristics: The smooth transition from the flange neck to the pipe bore minimizes turbulence and pressure drop, promoting efficient fluid or gas flow.

Long Service Life: With proper installation and maintenance, weld neck flanges can have a long service life in demanding industrial environments.

Versatility: They are suitable for a wide range of applications including oil and gas, chemical processing, water treatment, and power generation industries.

• Disadvantages of Weld Neck Flanges:

Cost and Complexity: Weld neck flanges can be more expensive and require skilled labor for welding compared to slip-on or threaded flanges.

Installation Time: Welding the flange to the pipe requires additional time and expertise compared to other types of flanges, which may impact project timelines.

Space Requirements: The elongated neck of weld neck flanges may require more space compared to other flange types, which can be a consideration in tight or compact installations.

Potential Corrosion at Weld Joint: Improper welding techniques or inadequate corrosion protection can lead to corrosion at the weld joint, impacting the flange's performance over time.

Maintenance Challenges: Accessing and inspecting the weld joint for maintenance purposes may require specialized tools or procedures, adding to maintenance complexity.

When Should Weld Neck Flanges be Used?

• High-Pressure Systems:

ASME Pressure Vessels: Used extensively in pressure vessel applications where reliability under high pressure is critical.

Oil and Gas Pipelines: Employed in pipelines handling high-pressure fluids or gases to ensure secure connections that withstand internal pressure.

• High-Temperature Environments:

Steam Lines: Used in steam pipelines where high temperatures and pressures necessitate durable, heat-resistant connections.

Chemical Processing: Found in chemical plants for connecting pipes carrying corrosive substances at elevated temperatures.

• Critical Services:

Power Generation: Commonly used in power plants for connecting pipes in boiler systems, turbine lines, and other critical components.

Nuclear Industry: Utilized in nuclear power plants due to their reliability and ability to withstand high pressures and temperatures.

• Infrastructure and Construction:

Water Treatment: Found in water treatment facilities for connecting pipes that handle high-pressure water flows.

Building HVAC Systems: Used in heating, ventilation, and air conditioning systems where secure connections are crucial for efficient operation.

• Specialized Applications:

Food and Beverage Industry: Used in sanitary applications where hygiene and cleanliness are paramount.

Aerospace and Defense: Utilized in specialized applications requiring high reliability and structural integrity.