BS4504 Carbon Steel Threaded Flanges/Raised Face Threaded Flanges ASTM A105 2 Inch Threaded Pipe Flange PN 40 for Oil and Gas Piping Systems

Introduction of BS4504 Threaded Flanges:

A threaded flange is designed to connect to a threaded pipe without requiring welding, offering a practical solution where welding is impractical, time-consuming, or not feasible.

Threaded flanges are particularly advantageous for alloy steel flanges that are strong but pose challenges for welding or have poor welding performance. They provide a reliable alternative for achieving a secure connection without the complexities associated with welding. However, it's essential to note the temperature limitations of threaded flanges. They are not suitable for applications involving rapid temperature changes or where temperatures exceed 260°C or fall below -45°C, as this could lead to potential leakage.

In terms of their structure, threaded flanges resemble Slip-On flanges but are specifically bored to match the inner diameter of the pipe. The backside of the central opening is threaded with tapered pipe threads of the appropriate size to ensure a precise fit between the flange and the pipe.

The primary advantage of threaded flanges lies in their elimination of welding requirements. This simplifies installation and reduces additional torque applied to the pipe or vessel during flange assembly. By avoiding welding-related stresses, threaded flanges are well-suited for high-pressure pipe connections where maintaining joint integrity is critical.

1.Dimensions are in millimeters(mm).

2.Dimensions can be specified by different purchasers.

Common Grades of Carbon Steel Threaded Flanges:

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.

Features of Carbon Steel Threaded Flanges in the Applications:

Easy Installation: Threaded flanges facilitate a straightforward installation process without requiring welding. The threaded connection allows for quick assembly, saving time and reducing labor costs during installation.

Versatility: Threaded flanges are highly versatile, suitable for use with a wide range of pipe sizes and materials. They offer compatibility with various piping systems, making them adaptable for different industrial applications and projects.

Maintenance Convenience: Threaded flanges enable easy maintenance and disassembly. If repairs or modifications are necessary, the threaded connection can be easily undone, providing swift access to the pipe system. This convenience minimizes downtime and the need for specialized tools or equipment.

Cost-Effective Solution: Compared to welded flanges, carbon steel threaded flanges can be a more cost-effective option. They eliminate the expenses associated with welding equipment, skilled welders, and post-weld inspections. This cost-saving aspect makes them attractive for budget-conscious projects.

Suitable for Non-Cyclic Applications: Threaded flanges are well-suited for applications where there are steady operating conditions without significant pressure or temperature fluctuations. They provide a reliable and secure connection under constant operational parameters.

Compatibility with Carbon Steel Pipes: Carbon Steel Threaded Flanges are specifically designed to be compatible with carbon steel pipes. This ensures a robust and durable connection that meets the strength and performance requirements of carbon steel piping systems.

Application of BS4504 Carbon Steel Threaded Flanges:

Petroleum and gas industry: BS4504 Carbon Steel Threaded 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. BS4504 Carbon Steel Threaded Flanges can meet these requirements and are suitable for various oil and gas exploration, processing, and transportation environments.

Chemical industry: In the chemical industry, BS4504 Carbon Steel Threaded 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 BS4504 Carbon Steel Threaded Flanges and their compatibility with other pipeline materials make them a common choice in the chemical industry.

Power plants: BS4504 Carbon Steel Threaded 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. BS4504 Carbon Steel Threaded 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, BS4504 Carbon Steel Threaded 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. BS4504 Carbon Steel Threaded Flanges provide a reliable connection method, can withstand high pressures and temperatures, and meet the needs of the manufacturing process.