BS 4504 PN2.5 CODE 111 Raised Face Flat Face Carbon Steel/Stainless Steel Weld Neck Flange Welded To Pipe WNRF

BS 4504 PN 2.5 Code 111 Carbon Steel and Stainless Steel Weld Neck Flanges for Industrial Purposes

Introduction:

We are Shaanxi Peter International Trade Co., Ltd., a reputable and well-established company of rich experience in the industry. As your reliable supplier, we have been providing high-quality BS4504 WELD NECK FLANGES for more than 20 years in the industry.

BS4504 weld neck flanges are a type of pipe flange that is designed to be butt-welded to the end of a pipe. They have a long tapered hub that gradually merges with the pipe, providing reinforcement and reducing stress concentrations. The flange is then bolted to another weld neck flange or a compatible flange using bolts or studs.

BS4504 standards are widely used in Europe, particularly in UK, and BS4504 weld neck flanges conform to the specific dimensional and technical requirements set by BS standards. These flanges are available in various materials such as carbon steel, stainless steel, and alloy steel, allowing them to be used in a wide range of applications in industries such as oil and gas, petrochemical, power generation, and more.

Description of BS4504 Weld Neck Flanges:

The BS4504 weld neck flange is indeed widely regarded as a popular and preferred flange type due to its exceptional features and benefits. It offers a superior and seamless connection through direct butt welding to pipes, making it highly reliable and suitable for high-pressure environments. The extended neck provides added strength and durability, while the weld connection ensures a secure and leak-proof joint.

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

In addition to its performance advantages, the weld neck flange's extended neck also facilitates easy inspection and maintenance activities, enhancing its practicality and accessibility.

BS4504 Weld neck flanges are easily identifiable by their long tapered hub, which serves a critical role in providing reinforcement when welded to a pipe. The welding of the flange's neck to a pipe enables the transfer of stress from the flange to the pipe, resulting in improved support and stability. These flanges are widely used in applications that involve high pressure and extreme temperatures, where the joint's reliability and strength are paramount.

At Shaanxi Peter International Trade Co., Ltd., we specialize in offering raised face weld neck flanges that conform to BS4504 standards. These standards ensure dimensional compatibility and adherence to specific technical specifications, facilitating seamless integration into diverse piping systems. Our flanges are available in both carbon steel and stainless steel options, catering to different operating conditions and corrosion resistance requirements.

BS4504 Weld Neck Flange Dimensions:

1.Dimensions are in millimeters(mm).

2.Dimensions can be specified by different purchasers.

Materials of BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges:

BS4504 weld neck flanges are available in various materials to suit different applications and operating conditions. The material selection for BS4504 weld neck flanges depends on factors such as temperature, pressure, corrosion resistance, and compatibility with the conveyed fluid or gas.

Some Common Grades of Carbon Steel:

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.

Some Common 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.

Process of BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges to a pipe:

The process of connecting BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges to a pipe involves several steps. Here's a general overview of the process:

• Preparation:

Ensure that the pipe and the flange are clean and free from any debris, rust, or contaminants. Use appropriate cleaning methods such as wire brushing or solvent cleaning if necessary.
Inspect the flange and pipe to ensure they are in good condition, without any visible damage or defects.

• Alignment:

Align the flange with the pipe, ensuring that the bolt holes on the flange align with the pipe's bolt holes. The flange should be positioned with the raised face (if applicable) facing outward.

• Gasket Installation:

Place a suitable gasket between the flange faces to ensure a tight and leak-free seal. The gasket material should be compatible with the fluid being conveyed and the operating conditions.
Ensure that the gasket is centered properly and fits within the bolt circle of the flange.

• Bolt Installation:

Insert the bolts through the bolt holes in the flange and pipe. Use the appropriate size and grade of bolts and nuts as specified by the flange standard (BS4504) or the design requirements.
Hand-tighten the nuts onto the bolts, ensuring that they are evenly distributed around the flange.

• Flange Tightening:

Gradually tighten the bolts in a diagonal pattern using a torque wrench or suitable tool. Follow the recommended torque values specified by the flange standard or the design requirements.
Tighten the bolts in multiple passes, alternating between opposite sides of the flange, to ensure even and uniform tightening. This helps to prevent distortion or uneven pressure distribution.

• Inspection and Testing:

Once the flange is securely bolted to the pipe, visually inspect the connection to ensure that it is properly aligned and there are no visible gaps or misalignments.
Perform a leakage test, such as a hydrostatic or pneumatic pressure test, to verify the integrity of the connection and ensure there are no leaks.

Advantages of BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges:

BS4504 weld neck flanges are widely recognized for their superior connection and are commonly utilized in larger sizes and higher pressure classes. Their unique design, with a neck extension and weld bevel, allows for a strong and reliable connection to pipes through butt welding.

The BS4504 weld neck flange's extended neck provides several advantages, including:

Strength and Durability: The welded neck extension provides additional strength to the flange, making it suitable for high-pressure applications. The weld connection ensures a secure and leak-free joint, enhancing the overall durability of the flange.

Stress Distribution: The tapered neck design of the weld neck flange helps in distributing the stress evenly across the flange and pipe, reducing the risk of localized stress concentration and potential failure.

Enhanced Flow Characteristics: The smooth transition from the flange's neck to the pipe's bore minimizes turbulence and pressure drop, allowing for improved flow characteristics in the system.

Easy Inspection and Maintenance: The extended neck of the weld neck flange allows for easier visual inspection and access for maintenance activities such as cleaning, inspection, and repairs.

Applications of BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges:

BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges are commonly used in various applications where a strong and leak-free connection between pipes or equipment is required. Here are some typical applications of these flanges:

Oil and Gas Industry: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges are widely used in the oil and gas industry for connecting pipes, valves, and equipment in upstream, midstream, and downstream operations. They are suitable for applications such as oil and gas pipelines, refineries, petrochemical plants, and offshore platforms.

Power Generation: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges find extensive use in power generation facilities, including thermal power plants, nuclear power plants, and renewable energy installations. They are used to connect pipes and fittings in steam lines, condenser systems, and other high-pressure and high-temperature applications.

Chemical and Petrochemical Industry: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges are commonly employed in chemical processing plants, petrochemical refineries, and chemical storage facilities. They are used in applications involving corrosive fluids, high temperatures, and high-pressure conditions.

Water and Wastewater Treatment: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges are used in water treatment plants, wastewater treatment facilities, and desalination plants. They are suitable for connecting pipes and equipment in water supply systems, sewage systems, and various treatment processes.

HVAC and Plumbing Systems: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges are utilized in heating, ventilation, and air conditioning (HVAC) systems, as well as plumbing installations. They provide a secure connection for pipes carrying hot or chilled water, steam, or other fluids in commercial buildings, residential complexes, and industrial facilities.

Food and Beverage Industry: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges are used in the food and beverage industry for hygienic and sanitary applications. They are suitable for connecting pipes in processing plants, breweries, dairies, and other food production facilities.

Pharmaceutical Industry: BS4504 Carbon Steel and Stainless Steel Weld Neck Flanges find application in the pharmaceutical industry, where sanitary and sterile conditions are essential. They are used in pharmaceutical manufacturing plants and laboratories to connect pipes and equipment for the production of medicines and drugs.