Welcome to YANHAO, your trusted source for high-quality 46″ pipe flanges. With our decades of expertise and commitment to excellence, we offer a comprehensive range of pipe flange solutions to meet the diverse needs of industries worldwide. Explore our extensive catalog to discover the perfect 46″ pipe flange for your project.

Technical Specifications

Certainly, let’s delve into the technical specifications of 46″ pipe flanges in more detail:

1. Size:

  • Nominal Pipe Size (NPS): 46 inches
  • Outer Diameter: The outer diameter of the flange will vary based on the specific type and standard it adheres to. Typically, for a 46″ NPS flange, the outer diameter would be significantly larger than 46 inches to accommodate the bolts and connect with a pipe with a 46-inch inner diameter.

2. Material Options:

  • Carbon Steel: Carbon steel is a robust and cost-effective material widely used in industrial applications. It provides strength and durability and is suitable for a range of operating conditions.
  • Stainless Steel: Stainless steel offers excellent corrosion resistance and is ideal for environments where rust or chemical corrosion is a concern. Different grades of stainless steel may be chosen based on specific corrosion resistance requirements.
  • Alloy Steel: Alloy steel combines the strength of carbon steel with added elements to enhance properties like high-temperature resistance, corrosion resistance, and wear resistance. Alloy steel is chosen for applications requiring exceptional performance under demanding conditions.
  • Exotic Alloys: In specialized applications with extreme conditions, exotic alloys such as Inconel, Monel, or Hastelloy may be used. These alloys offer unique properties like resistance to extreme temperatures, acids, or aggressive chemicals.

3. Pressure Ratings:

  • ANSI Class Ratings: ANSI class ratings for flanges are commonly used in North America. They range from ANSI Class 150 to ANSI Class 2500. The class rating indicates the flange’s ability to withstand pressure. For example, ANSI Class 150 is suitable for lower-pressure applications, while ANSI Class 2500 is designed for extremely high-pressure systems.
  • PN Ratings: PN (Pressure Nominal) ratings are used in Europe and range from PN 6 to PN 400. These ratings are similar to ANSI class ratings and denote the pressure-carrying capacity of the flange.
  • It’s crucial to select the appropriate pressure rating to ensure safety and performance in your specific application. Factors such as fluid type, temperature, and operating pressure should all be considered.

4. Finishes:

  • Rust-Resistant Coatings: Many 46″ pipe flanges are coated with rust-resistant materials to protect against corrosion. Common coatings include epoxy, zinc, or various types of paint. These coatings help extend the lifespan of the flanges, especially in outdoor or humid environments.
  • Specialized Coatings: Depending on the application and material, specialized coatings or surface treatments may be applied to enhance corrosion resistance or other properties. For example, Teflon coatings for improved chemical resistance.

When selecting 46″ pipe flanges, it’s essential to match the material, pressure rating, and finish to the specific requirements of your project, taking into account factors such as the type of fluid being transported, environmental conditions, and safety regulations. Consulting with an engineer or industry expert is often advisable to ensure the right choice for your application.

Product Varieties

1. Weld Neck Flanges:

  • Description: Weld neck flanges are designed with a long, tapered neck that provides excellent reinforcement to the connection. They are ideal for high-pressure and high-temperature applications, as the neck distributes stress evenly, reducing the risk of leakage or flange deformation.
  • Applications: Commonly used in industries such as oil and gas, petrochemical, and power generation where safety and integrity are paramount.

2. Slip-On Flanges:

  • Description: Slip-on flanges have a low profile and are easy to install. They slide over the pipe and are then welded in place, providing a secure connection. They are suitable for low-pressure systems and applications where frequent assembly and disassembly are not required.
  • Applications: Used in industries such as HVAC, plumbing, and water treatment, where ease of installation and cost-effectiveness are important.

3. Threaded Flanges:

  • Description: Threaded flanges have internal threads that allow them to be easily screwed onto threaded pipes or fittings. They offer a convenient and reliable connection for systems with threaded components.
  • Applications: Commonly used in plumbing, gas distribution, and small-scale industrial applications where pipe threading is prevalent.

4. Blind Flanges:

  • Description: Blind flanges are solid, flat plates used to seal off the end of a piping system. They are typically used in applications where future expansion or maintenance may be required, as they can be easily removed.
  • Applications: Found in a variety of industries, including water treatment, oil refineries, and chemical processing plants, where isolating sections of a pipeline is necessary.

5. Socket Weld Flanges:

  • Description: Socket weld flanges have a recessed area (socket) that fits over the pipe end. After welding, the connection is strong, leak-free, and well-suited for systems requiring higher pressure ratings.
  • Applications: Commonly used in high-pressure piping systems, particularly in the petrochemical and chemical industries.

6. Lap Joint Flanges:

  • Description: Lap joint flanges consist of two parts: a stub end and a backing flange. The stub end is welded to the pipe, and the backing flange rests against it without direct contact with the fluid. This design allows for easy dismantling and maintenance.
  • Applications: Frequently used in systems where frequent disassembly is necessary, such as in food processing, pharmaceutical, and chemical industries.

These various types of 46″ pipe flanges cater to a wide range of applications and industries, offering solutions that prioritize factors like pressure, temperature, ease of installation, and maintenance requirements. Selecting the right type of flange is crucial to ensure the integrity and safety of your piping system.


1. Oil and Gas Industry:

  • Upstream: 46″ pipe flanges are used in drilling and exploration activities, providing reliable connections for wellheads and pipelines that transport crude oil and natural gas from the reservoirs.
  • Midstream: These flanges are crucial for transmission pipelines that transport oil and gas from production sites to processing facilities, storage tanks, and distribution networks.
  • Downstream: Refineries rely on 46″ pipe flanges for various processing units, including distillation columns, reactors, and heat exchangers, ensuring safe and efficient operation.

2. Petrochemical Industry:

  • Chemical Processing: 46″ flanges play a vital role in chemical plants, facilitating the transfer of chemicals, acids, and corrosive substances while maintaining the integrity of the piping systems.
  • Petrochemical Refining: Refineries and petrochemical facilities use these flanges to handle hydrocarbons, solvents, and other volatile materials in refining processes.

3. Industrial Applications:

  • Power Generation: Power plants utilize 46″ pipe flanges in boiler systems, steam turbines, and cooling systems, where high temperatures and pressures are common.
  • Water Treatment: These flanges help manage water treatment processes, including the distribution of treated water and the handling of chemicals for purification.
  • Manufacturing: In industrial manufacturing, flanges are used for various fluid transportation and processing needs, supporting processes such as food production, pulp and paper manufacturing, and more.
  • Construction: 46″ flanges may be used in large-scale construction projects, including the installation of pipelines for water supply, sewage systems, or industrial facilities.

4. Mining and Minerals:

  • Mining Operations: In mining, these flanges are employed for transporting minerals, slurry, and process fluids in demanding environments.
  • Mineral Processing Plants: Processing facilities rely on 46″ flanges to handle chemicals and materials involved in mineral concentration and extraction processes.

5. Infrastructure Projects:

  • Water and Wastewater Infrastructure: Municipalities use 46″ flanges for water distribution networks, sewage systems, and wastewater treatment plants.
  • Bridge Construction: These flanges may be used in the construction of bridges for drainage and water management.

6. Marine and Offshore Applications:

  • Shipbuilding: In the shipbuilding industry, 46″ flanges are used for various marine systems, including piping for propulsion, heating, and cooling.
  • Offshore Platforms: Offshore drilling platforms and production facilities employ these flanges in underwater pipelines for oil and gas extraction.

7. Specialized Industries:

  • Aerospace: In specialized aerospace applications, such as rocket engine test stands, 46″ flanges may be used for high-pressure fluid systems.
  • Research and Development: Laboratories and research facilities often require custom 46″ flanges for specialized testing and experimentation.

These applications illustrate the versatility and importance of 46″ pipe flanges in various industries and sectors. Whether it’s for transporting fluids, managing high pressures and temperatures, or ensuring the reliability of critical systems, these flanges are essential components in a wide range of projects and processes.

Key Features

1. Size and Material:

  • Size: 46 inches – These flanges are specifically designed to fit pipes with a 46-inch inner diameter, providing a secure and precise connection.
  • Material Options: YANHAO offers a range of material options to suit your application, including carbon steel, stainless steel, alloy steel, and even exotic alloys. Each material is selected for its unique properties, such as strength, corrosion resistance, and suitability for specific operating conditions.

2. Custom Solutions:

  • Tailored to Your Needs: At YANHAO, we understand that every project is unique. Our custom solutions allow you to specify the material, finish, and pressure rating that best suits your requirements.
  • Material Selection: Choose the material that aligns with your application’s demands, ensuring longevity and reliability.
  • Finish Options: Select from various finishes, including rust-resistant coatings and specialized surface treatments, to enhance performance and durability.
  • Pressure Ratings: Customize the flanges to your desired pressure rating within the ANSI class 150 to 2500 or PN 6 to PN 400 range, ensuring compatibility with your system’s demands.

3. Quality Assurance:

  • Rigorous Testing: YANHAO products undergo comprehensive testing procedures to guarantee their quality and reliability. These tests may include pressure testing, material analysis, and dimensional checks.
  • Certifications: Our flanges are compliant with internationally recognized standards such as ANSI, ASME, API, and ISO, demonstrating their adherence to industry best practices.
  • Material Traceability: Full material traceability ensures that the materials used in our flanges meet the specified standards and provide consistency and safety.

4. Applications:

  • Wide Range of Industries: Explore the diverse array of industries that benefit from our 46″ pipe flanges, including oil and gas, petrochemical, industrial, and more.
  • Versatile Utility: These flanges serve as critical components in piping systems, facilitating the safe and efficient transport of fluids in a variety of demanding applications.
  • Proven Reliability: YANHAO’s 46″ pipe flanges are trusted by professionals in industries where safety, performance, and reliability are paramount.

These key features showcase YANHAO’s commitment to providing high-quality, customizable, and reliable 46″ pipe flange solutions for a wide range of applications and industries. Whether you require flanges for high-pressure systems, corrosive environments, or specific material properties, we have the expertise and flexibility to meet your needs.

Quality Assurance

1. Rigorous Testing:

  • Durability Testing: YANHAO subjects its 46″ pipe flanges to rigorous durability tests to ensure they can withstand the harsh conditions they may encounter in various applications. These tests may involve exposing the flanges to extreme temperatures, pressures, or mechanical stresses to assess their performance and resilience.
  • Integrity Testing: The integrity of each flange is carefully examined to verify that there are no defects or imperfections that could compromise its performance. This includes checks for structural integrity, weld quality, and surface finish.

2. Certifications:

  • ANSI and ASME Standards: YANHAO’s commitment to quality is demonstrated by the fact that their products comply with ANSI (American National Standards Institute) and ASME (American Society of Mechanical Engineers) standards. These standards are widely recognized and respected in the industry and ensure that the flanges meet specific design and performance criteria.
  • API Standards: For applications in the oil and gas industry, adherence to API (American Petroleum Institute) standards is critical. YANHAO’s flanges are compliant with API standards, ensuring they meet the stringent requirements of this sector.
  • ISO Certification: ISO (International Organization for Standardization) certification is a testament to YANHAO’s commitment to maintaining a high level of quality and consistency. ISO standards cover various aspects of manufacturing, including quality management systems.

3. Traceability:

  • Material Traceability: YANHAO maintains full material traceability for their 46″ pipe flanges. This means that they can trace the origin and history of the materials used in each flange, ensuring that they meet the specified standards and quality requirements. Material traceability is essential for quality control and for addressing any issues related to material quality or performance.

By emphasizing rigorous testing, compliance with industry standards, and material traceability, YANHAO demonstrates its dedication to producing 46″ pipe flanges that are not only reliable but also meet the highest standards of quality and safety. This commitment instills confidence in customers, assuring them that they are investing in products that will perform consistently and effectively in their critical applications.

Customization Options

1. Material Selection:

  • Alloys and Metals: YANHAO offers a diverse selection of materials to cater to the specific demands of your application. These materials include but are not limited to:
    • Carbon Steel: Known for its strength and durability, carbon steel is a common choice for general industrial applications.
    • Stainless Steel: Offers excellent corrosion resistance, making it ideal for environments where rust or chemical corrosion is a concern.
    • Alloy Steel: Combines the strength of carbon steel with added elements to enhance properties like high-temperature resistance, corrosion resistance, and wear resistance.
    • Exotic Alloys: For specialized applications requiring exceptional performance under extreme conditions, exotic alloys such as Inconel, Monel, or Hastelloy may be available.

2. Finish Options:

  • Rust-Resistant Coatings: To enhance the longevity and corrosion resistance of your 46″ pipe flanges, you can choose from a variety of rust-resistant coatings, including epoxy coatings, zinc coatings, or other specialized surface treatments. These coatings protect the flanges, especially in outdoor or humid environments.
  • Specialized Coatings: Depending on your application’s requirements, YANHAO can provide specialized coatings or surface treatments tailored to your specific needs. For example, Teflon coatings may be applied for improved chemical resistance.

3. Pressure Ratings:

  • Custom Pressure Ratings: To ensure compatibility with your system’s requirements, YANHAO allows you to customize the pressure rating of your 46″ pipe flanges. Pressure ratings can be adjusted within the ANSI class 150 to 2500 or PN 6 to PN 400 range. This customization ensures that the flanges seamlessly integrate into your system, providing safety and reliability at the required pressure levels.

These customization options empower you to select the precise combination of materials, finishes, and pressure ratings that best align with the unique demands of your project. YANHAO’s commitment to tailoring their 46″ pipe flanges to your specific needs ensures that you receive a solution that not only meets but exceeds your expectations in terms of performance, durability, and compatibility.

Frequently Asked Questions (FAQ):

1. What applications are 46″ pipe flanges suitable for?

Answer: 46″ pipe flanges are widely used in various industries, including the oil and gas sector, chemical industry, industrial applications, power generation, water treatment, manufacturing, and construction, catering to diverse application needs.

2. What material options are available for these flanges?

Answer: We offer a range of material options, including carbon steel, stainless steel, alloy steel, and specialized alloys, allowing you to choose based on your specific application requirements.

3. Can the pressure rating be customized to meet specific needs?

Answer: Yes, we can customize the pressure rating of these flanges to align with the requirements of your system, ensuring a perfect fit for your engineering projects.

4. Can these flanges resist corrosion?

Answer: Indeed, we offer corrosion-resistant coating options, such as epoxy coatings, zinc coatings, and more, to enhance the corrosion resistance of the flanges, making them suitable for various environmental conditions.

5. Do these flanges comply with international standards?

Answer: Yes, our 46″ pipe flanges are compliant with international standards, including ANSI, ASME, API, and ISO, ensuring that they meet industry standards for quality and performance.

6. What are the standard dimensions of these flanges?

Answer: The dimensions of 46″ pipe flanges are determined based on ANSI or PN specifications to ensure compatibility with various pipe sizes.

7. Do you provide flange accessories such as bolts and nuts?

Answer: Yes, we offer flange accessories that are compatible with 46″ pipe flanges, including high-strength bolts and nuts.

8. How are these flanges installed and connected?

Answer: Typically, installation and connection involve welding, threading, or flange connection techniques. We recommend having these tasks performed by professional technicians for proper installation and sealing.

9. Do you provide three-dimensional drawings or technical specifications for the flanges?

Answer: Yes, we can provide three-dimensional drawings and technical specifications for 46″ pipe flanges to assist you in your project design and planning.

10. Do you provide customized solutions?

Answer: Absolutely, we offer customized solutions tailored to your specific needs, including material selection, coating preferences, and pressure rating requirements to create flange specifications that match your project’s unique demands.

11. How can I contact you for quotes or technical support?

Answer: You can reach out to us via phone, email, or our online contact form on our website. Our dedicated team of experts is available to provide the support and information you need.

Lewis Liu

Hello, I am Lewis Liu, a professional sales engineer with over ten years of experience in the flange fittings industry. I am highly knowledgeable in flange selection, installation, and maintenance. I am passionate about providing customers with the best solutions to ensure their pipeline systems run smoothly, safely, and reliably.

If you have any questions or concerns regarding flange fittings for your pipelines, whether it’s about selection, material choice, specification requirements, or any other aspect, please feel free to contact me at any time. I am committed to offering professional advice and assistance to help you make informed decisions and meet your needs.

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