28″ Pipe Flange Specifications

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  1. Size:
    • Nominal Diameter: 28 inches (711.2 mm)
    • Outside Diameter (OD): Typically falls within the range of 762 mm (30 inches) to 800 mm (31.5 inches), depending on specific design and standards.
    • Bolt Hole Diameter: Typically ranges from 25 mm (1 inch) to 38 mm (1.5 inches) for standard flanges. However, bolt-hole sizes can vary based on flange class and design requirements.
    • Thickness: The thickness of a 28″ pipe flange usually falls between 38 mm (1.5 inches) to 63.5 mm (2.5 inches), but it can vary based on material, pressure rating, and flange type.
  2. Materials:
    • YANHAO’s 28″ pipe flanges are crafted from high-quality materials that are selected based on project requirements. Common materials include:
      • Carbon Steel:
        • ASTM A105 (Standard Specification for Carbon Steel Forgings for Piping Applications)
        • ASTM A350 LF2 (Low-Temperature Carbon Steel)
        • ASTM A694 (Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts)
      • Stainless Steel:
        • 304 Stainless Steel (ASTM A182 / A240)
        • 316 Stainless Steel (ASTM A182 / A240)
        • 321 Stainless Steel (ASTM A182 / A240)
        • 347 Stainless Steel (ASTM A182 / A240)
      • Alloy Steel:
        • ASTM A182 F5, F9, F11, F22 (Alloy Steel Forged Fittings and Flanges)
        • ASTM A350 LF3 (Low Alloy Steel)
        • ASTM A707 L3, L3 CL1 (Low Alloy Steel Forged Carbon and Alloy Steel Flanges)
  3. Pressure Ratings:
    • Our flanges are designed to handle a range of pressure ratings, ensuring compatibility with various applications. Common pressure classes include:
      • Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500
      • PN 6, PN 10, PN 16, PN 25, PN 40, PN 64, PN 100
  4. Facing and Flange Types:
    • YANHAO offers a variety of facing types to accommodate different gasket materials and sealing requirements. Common facing types include:
      • Raised Face (RF)
      • Flat Face (FF)
      • Ring Type Joint (RTJ)
      • Tongue and Groove (T&G)
  5. Standards and Certifications:
    • Our 28″ pipe flanges are compliant with industry standards and specifications, including but not limited to:
      • ASME B16.5 – Pipe Flanges and Flanged Fittings
      • ASME B16.47 – Large Diameter Steel Flanges
      • EN 1092 – European Flange Standards
      • JIS B2220 – Japanese Industrial Standard
      • Other international standards as required
  6. Industry Compatibility:
    • YANHAO’s commitment to excellence extends to ensuring that our 28″ pipe flanges seamlessly integrate into various industrial contexts. These flanges are engineered with industry standards and compatibility in mind, making them suitable for a wide range of applications, including:
      • Oil and Gas: Our 28″ pipe flanges are designed to withstand the high pressures and corrosive environments often encountered in the oil and gas industry. They conform to API standards for reliability.
      • Petrochemicals: For the petrochemical sector, YANHAO’s flanges are tailored to handle diverse chemicals and extreme temperatures, adhering to relevant ASTM standards.
      • Power Generation: In power generation plants, our flanges are engineered to meet ASME standards, ensuring dependable performance under demanding conditions.
      • Water Treatment: For water treatment facilities, our flanges are available in materials suitable for potable water applications, complying with NSF/ANSI standards.
      • Custom Solutions: YANHAO understands that unique projects may require specialized flanges. Our engineering expertise allows us to provide custom solutions that meet your precise needs while maintaining industry standards.

With YANHAO’s 28″ pipe flanges, you can trust that your projects will benefit from precise engineering, stringent quality control, and full compliance with industry standards, ensuring seamless integration and optimal performance.

Advantages of YANHAO’s 28″ Pipe Flange

Choosing YANHAO’s 28″ pipe flange over competitors offers a multitude of advantages that can significantly impact your industrial operations. We pride ourselves on delivering flange solutions that prioritize reliability, longevity, and cost-effectiveness. Here are the key advantages of opting for YANHAO:

1. Unparalleled Reliability:

  • YANHAO’s 28″ pipe flanges are engineered to the highest standards of precision and quality. Our commitment to excellence ensures that our flanges consistently deliver reliable and leak-free performance, safeguarding your operations from unexpected downtime and costly repairs.

2. Exceptional Longevity:

  • Durability is at the core of YANHAO’s flange design and manufacturing. Our flanges are built to withstand harsh industrial environments, corrosive substances, high pressures, and extreme temperatures. This longevity minimizes the need for frequent replacements and reduces maintenance costs.

3. Precise Engineering:

  • YANHAO’s engineering expertise ensures that our flanges are manufactured with utmost precision. Each flange is designed to fit seamlessly, promoting optimal flow, reducing turbulence, and minimizing stress on the pipeline. This precision translates to improved efficiency and reduced energy consumption.

4. Extensive Material Options:

  • We offer a wide range of material options, including carbon steel, stainless steel (e.g., 304, 316), alloy steel, and specialty alloys, allowing you to choose the material that best suits your application’s specific requirements.

5. Compliance with Industry Standards:

  • YANHAO’s 28″ pipe flanges conform to rigorous industry standards and certifications, providing you with peace of mind regarding safety, quality, and regulatory compliance.

6. Cost-Effective Solutions:

  • While our flanges offer superior performance and durability, we remain committed to providing cost-effective solutions. Reduced maintenance, extended lifespan, and enhanced efficiency translate into long-term cost savings for your projects.

7. Expert Technical Support:

  • YANHAO is not just a product provider; we are your trusted partner. Our team of experts is readily available to assist you in selecting the right flange for your specific application, offering technical guidance, and addressing any inquiries or challenges you may encounter.

8. Custom Solutions:

  • We understand that unique projects may require specialized flanges. YANHAO excels in providing custom solutions tailored to your precise needs, ensuring that your applications run seamlessly.

In a competitive industrial landscape, choosing YANHAO’s 28″ pipe flange means choosing a product that excels in reliability, longevity, and cost-effectiveness. We invite you to experience the YANHAO advantage and witness firsthand how our flanges can elevate the performance and efficiency of your piping systems. Make the smart choice; choose YANHAO for your flange solutions.

Installation and Maintenance

Proper Installation:

1. Preparation is Key:

  • Ensure that the pipe ends are properly aligned and cleaned to remove any debris or contaminants.
  • Inspect the flange, gasket, and bolts for any visible damage or defects.

2. Gasket Selection:

  • Choose an appropriate gasket material based on the specific application and fluid type. Common gasket materials include rubber, graphite, and PTFE.
  • Ensure the gasket is properly aligned and seated within the flange.

3. Flange Alignment:

  • Make sure the flange faces are parallel and aligned correctly. Misalignment can lead to leaks and stress on the flange.
  • Utilize alignment tools if necessary to achieve precise alignment.

4. Bolt Tightening:

  • Tighten the bolts evenly and progressively in a crisscross pattern to ensure uniform pressure on the gasket.
  • Refer to torque specifications provided by YANHAO or relevant industry standards for proper bolt tightening.

Safety Considerations:

1. Personal Protective Equipment (PPE):

  • Ensure that personnel involved in the installation wear appropriate PPE, including gloves, safety glasses, and hearing protection if using power tools.

2. Handling Heavy Components:

  • Use lifting equipment or machinery as necessary to handle large and heavy flanges safely.
  • Follow proper lifting and handling procedures to prevent accidents and injuries.

3. Leak Testing:

  • Perform a leak test after installation to verify the integrity of the joint. Use appropriate testing methods, such as hydrostatic or pneumatic testing, depending on the application.

Maintenance and Longevity:

1. Regular Inspection:

  • Periodically inspect the flange and gasket for signs of wear, corrosion, or damage.
  • Check for loose bolts and re-tighten them as needed.

2. Corrosion Protection:

  • Implement corrosion protection measures as required, such as coatings, cathodic protection, or material selection.
  • Address corrosion promptly to prevent degradation of the flange’s integrity.

3. Gasket Replacement:

  • Replace gaskets when they show signs of wear, loss of compression, or leakage. Use compatible gasket materials.
  • Ensure proper alignment and torque when reinstalling bolts after gasket replacement.

4. Environmental Considerations:

  • Consider the environmental conditions in which the flange operates. Extreme temperatures, aggressive chemicals, or high-pressure environments may require specialized maintenance routines.

5. Expert Assistance:

  • When in doubt or if facing complex maintenance issues, seek the guidance of YANHAO’s experts or consult relevant industry specialists.

Proper installation and regular maintenance are essential for extending the lifespan of 28″ pipe flanges. By following these guidelines and adhering to safety practices, you can ensure the longevity and reliable performance of your flange connections in industrial applications.

Frequently Asked Questions (FAQs) About 28″ Pipe Flanges

At YANHAO, we understand that selecting the right 28″ pipe flange involves various considerations. Here, we address common questions and concerns to enhance your understanding and provide valuable information:

1. What is the purpose of a 28″ pipe flange?

  • A 28″ pipe flange serves as a crucial component in industrial piping systems, providing a secure and leak-free connection between pipes or other equipment. Its primary function is to ensure a reliable and sealed joint while allowing easy disassembly when necessary.

2. How do I choose the right material for my 28″ pipe flange?

  • The choice of material depends on factors such as the fluid being transported, temperature, pressure, and environmental conditions. Common materials include carbon steel, stainless steel (e.g., 304, 316), and alloy steel. Consult with our experts to determine the best material for your specific application.

3. What standards do YANHAO’s 28″ pipe flanges adhere to?

  • YANHAO’s flanges conform to various international standards, including ASME B16.5, ASME B16.47, EN 1092, and JIS B2220, among others. We ensure that our flanges meet stringent quality and safety requirements.

4. Are YANHAO’s 28″ pipe flanges suitable for high-pressure applications?

  • Yes, our flanges are available in a range of pressure classes, including Class 150, Class 300, Class 600, and higher, making them suitable for a wide range of pressure applications. Ensure you select the appropriate pressure class for your specific needs.

5. How can I ensure a proper seal with my 28″ pipe flange?

  • Achieving a proper seal involves factors like gasket selection, proper flange alignment, and correct bolt tightening. Follow manufacturer-recommended installation procedures and torque specifications to ensure a reliable seal.

6. Can YANHAO provide custom solutions for unique applications?

  • Absolutely. YANHAO specializes in offering custom flange solutions tailored to your project’s unique requirements. Contact our team, and we’ll work with you to design and manufacture a flange that meets your specific needs.

7. What maintenance is required for 28″ pipe flanges?

  • Regular inspection for wear, corrosion, and gasket integrity is crucial. Replace gaskets as needed and ensure bolts remain properly tightened. Our maintenance guidelines provide detailed instructions for maximizing flange lifespan.

8. How can I request a quote for YANHAO’s 28″ pipe flanges?

  • Requesting a quote is easy. Simply reach out to our sales team through our website, email, or phone, providing details about your requirements. Our team will promptly assist you in obtaining a competitive quote.

YANHAO is dedicated to providing not only high-quality 28″ pipe flanges but also the knowledge and support you need to make informed decisions. If you have further questions or require additional information, don’t hesitate to contact us. We’re here to ensure your piping projects are a success.


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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