EN1092-01 Type 11 Flange With Neck A105 Carbon Steel Weld Neck Flange PN 100 RFWN Flange

EN1092-01 Type 11 Flange With Neck A105 Carbon Steel Weld Neck Flange PN 100 Raised Face Weld Neck/RFWN Flange for Industrial Purposes

Description of EN1092-01 Weld Neck Flanges:

EN1092-01 specifies uniform dimensions for weld neck flanges, including outer diameter, bolt circle diameter, bolt hole diameter, and thickness. This standardization ensures compatibility with pipes and equipment from different manufacturers, facilitating ease of installation and replacement.

EN1092-01 weld neck flanges are available in a variety of materials such as carbon steel, stainless steel (e.g., grades 304, 316), alloy steel, and other alloys. The selection of materials is based on factors such as strength, corrosion resistance, and suitability for specific operational conditions. EN1092-01 categorizes weld neck flanges into different pressure classes (PN), ranging typically from PN6 to PN100. Each class indicates the maximum pressure that the flange can withstand, ensuring compatibility with various pressure requirements in industrial processes.

Weld neck flanges are welded directly to the pipe by butt welding. This method ensures a strong, leak-proof connection suitable for applications where reliability and fluid containment are critical. The full-penetration weld extends through the thickness of the flange and the pipe, providing a secure joint. EN1092-01 weld neck flanges offer different sealing surface configurations, including flat face, raised face, and ring type joint (RTJ). These options accommodate various types of gaskets and sealing materials, allowing for effective sealing against leaks in different operating environments.

EN1092-01 compliance ensures that weld neck flanges meet stringent European standards for quality, performance, and safety. Certification to these standards provides assurance of product reliability and conformance to regulatory requirements.

Specifications of EN1092-01 Weld Neck Flanges PN 100:

1.Dimensions are in millimeters(mm).

2. Dimensions can be specified by different purchasers.

What Materials We Provide?

Common Grades of Carbon Steel Weld Neck Flanges:

Carbon steel weld neck flanges are available in various grades, each with specific properties that make them suitable for different applications:

ASTM A105

Description: This is a standard specification for carbon steel forgings for piping applications.

Characteristics: High strength, good toughness, excellent machinability, and weldability.

Applications: Widely used in the oil and gas industry, chemical processing, and power generation.

ASTM A350 LF2

Description: This specification covers carbon and low-alloy steel forgings requiring notch toughness testing for low-temperature service.

Characteristics: Suitable for low-temperature applications with good impact resistance.

Applications: Used in low-temperature services like cryogenic applications.

ASTM A216 WCB

Description: This specification covers carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for high-temperature service.

Characteristics: Excellent strength and durability under high temperature and pressure conditions.

Applications: Commonly used in high-temperature environments such as refineries and chemical plants.

ASTM A694 F42 to F70

Description: These grades cover carbon and alloy steel forgings for high-pressure transmission service.

Characteristics: High yield strength and excellent toughness.

Applications: Ideal for high-pressure pipelines, including oil and gas transmission lines.

ASTM A234 WPB

Description: This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction.

Characteristics: Suitable for moderate and high-temperature services with good mechanical properties.

Applications: Used in the manufacturing of pipe fittings and flanges.

Types of Weld Neck Flanges in the Applications:

There are two main types of weld neck flanges: standard and long neck. Standard weld neck flanges are typically used in conjunction with butt weld fittings. They are designed to align with the inside diameter of the pipe or fitting they are connecting to, ensuring a seamless flow path and a secure, leak-free joint.

On the other hand, long weld neck flanges find application primarily with vessel nozzles and equipment connections. These flanges feature an extended neck, which facilitates a gradual transition from the flange to the vessel or equipment. This design is advantageous in scenarios where additional space is needed for insulation, or when there is a requirement for mounting instruments or other attachments.

Both types of weld neck flanges are engineered to match the internal diameter of the pipe or fitting they interface with, ensuring compatibility and reliability in various industrial applications. The choice between standard and long weld neck flanges depends on specific operational requirements such as pressure, temperature, and the structural demands of the installation.

Some Common Grades of Carbon Steel We Provide:

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.

Why We Choose Weld Neck Flanges?

Strength and Reliability: Weld neck flanges are known for their strength, making them suitable for high-pressure applications. The welded neck provides reinforcement to the flange, making it highly resistant to bending, twisting, and distortion. This structural integrity ensures a secure and reliable joint that can withstand high pressures and vibrations without failure.

Enhanced Structural Integrity: The long tapered hub of a weld neck flange allows for a smooth and gradual transition from the flange to the pipe. This design helps distribute stress more evenly, reducing the risk of stress concentrations that could lead to joint failure. It enhances the overall structural integrity of the piping system, particularly in critical applications.

Leakage Prevention: EN 1092-1 Weld Neck Flanges typically feature a raised face that provides a tight seal when compressed against a gasket. This design effectively prevents leakage of fluids or gases from the joint, ensuring reliability and safety in operations where leaks are not acceptable.

Suitability for High-Pressure Applications: Due to their robust construction and secure welding connection, weld neck flanges are well-suited for high-pressure piping systems. The welded joint between the flange and pipe creates a strong and leak-resistant connection capable of withstanding the forces exerted by high-pressure fluids or gases.

Resistance to Vibrations: Weld neck flanges are resistant to vibrations and mechanical stresses due to their welded connection. This stability reduces the risk of loosening or failure caused by vibration-induced fatigue, making them ideal for applications in industries such as oil and gas, petrochemicals, and power generation where machinery vibration is common.

Versatility: EN 1092-1 specifies a wide range of materials and dimensions for weld neck flanges, allowing them to be used in diverse industrial applications. They are available in various pressure ratings and sizes, accommodating different requirements for temperature, pressure, and fluid compatibility.