Product Overview

At YANHAO, we understand the vital role that 2″ pipe flanges play in ensuring the integrity and reliability of piping systems across diverse industries. Our 2″ pipe flanges are designed to meet the highest industry standards and offer exceptional performance in demanding applications.


Here are the detailed specifications for the 2″ Pipe Flange:

SpecificationDetailed Description
Size2 inches (Inches)
Pressure RatingANSI 150, ANSI 300, ANSI 600, ANSI 900, ANSI 1500, ANSI 2500
MaterialStainless Steel, Carbon Steel, Alloy Steel, or other specialized alloy materials (per customer requirements)
Flange TypeWeld Neck, Slip-On, Blind, Threaded, Forged, Lap Joint, Threaded Neck, Socket Weld, Flat Face, or other specialized types (per customer requirements)
Surface FinishSmooth, Raised Face, Concave Face, Oval, or other specialized surface finishes (per customer requirements)
Gasket CompatibilityDesigned for compatibility with various gasket materials, including rubber, metal, graphite, and others, to ensure effective sealing.
The detailed specifications for the 2″ Pipe Flange

These specifications provide a comprehensive overview of the 2″ Pipe Flange, including its size, pressure rating, material, flange type, surface finish, and gasket compatibility. If you require more information or a quotation, please feel free to contact our team, and we will provide personalized assistance and support.

Key Features and Specifications:

  • Precise Dimensional Accuracy: Our 2″ pipe flanges are meticulously manufactured to ensure precise dimensional accuracy, allowing for easy installation and secure connections.
  • Superior Strength and Durability: Constructed from high-quality materials, our flanges exhibit exceptional strength and durability, ensuring long-lasting performance even in harsh environments.
  • Corrosion Resistance: Our flanges are engineered to resist corrosion, protecting the integrity and longevity of the piping system they are installed in.
  • Wide Temperature Range: With the capability to withstand a wide range of temperatures, our flanges excel in both hot and cold environments, maintaining their structural integrity and performance.
  • Excellent Pressure Rating: Our 2″ pipe flanges are designed to handle high-pressure applications, providing a reliable and leak-free connection.

These key features and specifications set our 2″ pipe flanges apart from the competition, making them a preferred choice for industries such as oil and gas, chemical, water treatment, power generation, and more. Whether you require flanges for piping connections, pipelines, or other industrial applications, YANHAO’s 2″ pipe flanges offer the reliability and performance you can trust.


Our 2″ pipe flanges have a wide range of applications across various industries, thanks to their exceptional performance and reliability. Here are some of the industries where our flanges have found successful application:

  1. Oil and Gas Industry:
    • Used in oil refineries and petrochemical plants for connecting and securing piping systems.
    • Ideal for offshore platforms, providing reliable connections in harsh marine environments.
    • Utilized in pipelines for oil and gas transportation, ensuring leak-free and secure connections.
  2. Chemical Industry:
    • Employed in chemical processing plants for connecting pipelines and equipment.
    • Suitable for handling corrosive substances, thanks to their corrosion-resistant properties.
    • Used in chemical storage tanks and reactors to maintain the integrity of the system.
  3. Water and Wastewater Treatment:
    • Essential for connecting pipes in water treatment plants and sewage systems.
    • Used in water distribution networks, ensuring reliable connections and preventing leaks.
    • Employed in wastewater treatment facilities, providing secure connections in corrosive environments.
  4. Power Generation:
    • Utilized in power plants for connecting pipes carrying steam, water, and other fluids.
    • Reliable connections in nuclear power plants, ensuring safety and preventing leaks.
    • Essential for connecting pipelines in renewable energy facilities, such as solar and wind power plants.
  5. Construction and Infrastructure:
    • Used in HVAC systems for connecting ductwork and ventilation pipes.
    • Employed in plumbing systems for commercial and residential buildings.
    • Essential for connecting pipes in infrastructure projects like bridges, tunnels, and pipelines.

These are just a few examples of how our 2″ pipe flanges have been successfully used in real-world scenarios. With their superior performance, durability, and wide range of applications, our flanges have become the go-to choice for industries where secure and leak-free connections are paramount.

Materials and Manufacturing

At YANHAO, we prioritize quality and reliability in the production of our 2″ pipe flanges. We utilize high-quality materials and employ advanced manufacturing processes to ensure the durability and performance of our flanges.

Our 2″ pipe flanges are typically manufactured using materials that offer exceptional durability and resistance to corrosion. Common materials used include:

  1. Carbon Steel:
    • Carbon steel flanges offer excellent strength and durability.
    • They are highly resistant to corrosion, making them suitable for a wide range of applications.
  2. Stainless Steel:
    • Stainless steel flanges provide superior corrosion resistance, even in harsh environments.
    • They are highly durable, ensuring long-lasting performance in demanding applications.
  3. Alloy Steel:
    • Alloy steel flanges combine the strength of carbon steel with enhanced corrosion resistance.
    • They are often used in applications that require resistance to high temperatures and pressures.

Our materials are carefully selected to meet the specific requirements of each application, ensuring optimal performance and longevity.

Manufacturing Process:
Our advanced manufacturing process ensures precise dimensions and consistent quality for our 2″ pipe flanges. Here are some key aspects of our manufacturing process:

  1. Precision Machining:
    • Our flanges undergo precise machining processes to achieve accurate dimensions and smooth surfaces.
    • This ensures proper fit and ease of installation, minimizing the risk of leaks or failures.
  2. Quality Control:
    • At each stage of production, our flanges undergo stringent quality control checks.
    • We have robust inspection procedures in place to ensure that our flanges meet industry standards.
  3. Compliance with Standards:
    • Our manufacturing process adheres to international standards, such as ANSI, ASME, and API.
    • This ensures that our flanges are designed and produced to meet the stringent requirements of various industries.

By utilizing high-quality materials and advanced manufacturing techniques, YANHAO produces 2″ pipe flanges that offer exceptional durability, resistance to corrosion, and precise dimensions. Our commitment to quality ensures that our flanges consistently meet the industry’s highest standards.

Product Variations

Product Variations:
Our range of 2″ pipe flanges offers various options to meet the specific requirements of different applications. Here, we showcase the different variations available, including materials, finishes, and pressure ratings, and discuss their benefits and suitability for specific applications:

  1. Materials:
    a. Carbon Steel Flanges:
    • Benefits: High strength and durability, suitable for general-purpose applications.Suitable for: Oil and gas industry, chemical industry, water and wastewater treatment, power generation, construction, and infrastructure.
    b. Stainless Steel Flanges:
    • Benefits: Excellent corrosion resistance, suitable for corrosive environments.Suitable for: Chemical industry, water and wastewater treatment, marine applications, food processing, and pharmaceutical industry.
    c. Alloy Steel Flanges:
    • Benefits: Enhanced strength and corrosion resistance, suitable for high-pressure and high-temperature applications.
    • Suitable for: Oil and gas industry, power generation, chemical industry, and offshore installations.
  2. Finishes:
    a. Standard Flanges:
    • Benefits: Cost-effective solution for general-purpose applications.Suitable for: Construction, plumbing, HVAC systems, and infrastructure projects.
    b. Galvanized Flanges:
    • Benefits: Enhanced corrosion resistance, suitable for outdoor and humid environments.Suitable for: Water and wastewater treatment, infrastructure projects, and exposed piping systems.
    c. Coated Flanges:
    • Benefits: Added protection against corrosion and chemical exposure.
    • Suitable for the chemical industry, oil and gas industry, and corrosive environments.
  3. Pressure Ratings:
    a. Class 150 Flanges:
    • Benefits: Suitable for low-pressure applications, easy to install and maintain.Suitable for: General-purpose applications, plumbing systems, and low-pressure pipelines.
    b. Class 300 Flanges:
    • Benefits: Higher pressure capacity, suitable for moderate-pressure applications.Suitable for: Oil and gas industry, power generation, chemical industry, and high-pressure pipelines.
    c. Class 600 Flanges:
    • Benefits: High-pressure capacity, suitable for demanding applications.
    • Suitable for: Oil and gas industry, power generation, chemical industry, and high-pressure pipelines.

Each variation of our 2″ pipe flanges offers distinct benefits based on the material, finish, and pressure rating. It’s crucial to consider the specific requirements and environmental conditions of your application to choose the most suitable variation. Our knowledgeable team is ready to assist you in selecting the optimal flange variation for your specific needs, ensuring reliable and efficient performance.

Technical Specifications


  • Nominal Size: 2″
  • Outside Diameter (OD): The outer diameter of the flange, which may vary based on the specific design and material. For example, a carbon steel flange may have an OD of 4.84 inches.
  • Inside Diameter (ID): The inner diameter of the flange, typically slightly larger than the pipe’s outside diameter to allow for a proper fit. For a 2″ pipe flange, the ID may be around 2.44 inches.
  • Bolt Circle Diameter (BCD): The diameter of the circle that passes through the center of each bolt hole. This dimension depends on the specific flange design and pressure class.
  • Thickness: The thickness of the flange, usually measured from the outside surface to the inside surface. It can vary depending on factors such as pressure class and material. For example, a class 150 stainless steel flange may have a thickness of 0.88 inches.


  • Weight per Unit: The weight of a single 2″ pipe flange, which can vary depending on the material and design. For instance, a carbon steel flange might weigh around 3.96 pounds.
  • Weight per Bolt Hole: The weight of the flange section associated with each bolt hole. This weight may differ slightly depending on the flange design.

Pressure Classes:

  • Class 150: Suitable for low-pressure applications with a maximum pressure rating of 300 PSI (Pounds per Square Inch).
  • Class 300: Designed for moderate-pressure applications capable of handling pressures up to 600 PSI.
  • Class 600: Intended for high-pressure environments with a maximum pressure rating of 1200 PSI.

Industry Standards and Certifications:

  • ANSI/ASME Standards: Our flanges comply with the standards established by the American National Standards Institute (ANSI) and the American Society of Mechanical Engineers (ASME) to ensure quality and compatibility.
  • API Specification: Our flanges meet the requirements outlined in the relevant American Petroleum Institute (API) specifications for reliable performance in the oil and gas industry.
  • ISO Certifications: Our manufacturing processes adhere to the International Organization for Standardization (ISO) standards, ensuring consistent quality and reliability of our flanges.

Please note that the specific technical specifications, dimensions, and weight can vary based on the material, design, and pressure rating of the flanges. We recommend consulting our product catalog or contacting our sales team for detailed and accurate technical specifications for the specific variation of 2″ pipe flanges you require.

Installation and Maintenance

Installation Guidelines for 2″ Pipe Flanges:

  1. Preparation:
    • Ensure that the pipe ends are clean, smooth, and free from any debris or corrosion.
    • Inspect the flanges for any damages or defects and rectify them before installation.
    • Verify that the gaskets and bolts are compatible with the flange material and pressure class.
  2. Alignment:
    • Align the pipe and flange properly to ensure a leak-tight joint.
    • Use alignment pins or alignment tools to maintain proper alignment during installation.
  3. Gasket Installation:
    • Choose the appropriate gasket material based on the media, temperature, and pressure requirements.
    • Place the gasket between the flange faces, ensuring it is centered and properly seated.
    • For raised face flanges, ensure that the gasket covers the entire sealing surface.
  4. Bolt Tightening:
    • Gradually tighten the bolts in a cross pattern to distribute the load evenly.
    • Follow the recommended bolt tightening sequence and torque values specified by the manufacturer.
    • Avoid over-tightening, as it may cause deformation or damage to the flange.
  5. Inspection:
    • After installation, conduct a visual inspection to ensure proper alignment, gasket positioning, and bolt tightness.
    • Check for any signs of leakage or misalignment and rectify if necessary.

Maintenance and Troubleshooting Tips:

  1. Regular Inspection:
    • Periodically inspect the flanges for signs of corrosion, wear, or damage.
    • Check the gaskets for deterioration or extrusion, and replace them if necessary.
    • Look for loose bolts or leakage and address them promptly.
  2. Corrosion Prevention:
    • Apply corrosion-resistant coatings or paints to protect the flange surfaces from corrosion.
    • Consider using corrosion inhibitors or cathodic protection systems, especially in corrosive environments.
  3. Proper Torque Maintenance:
    • Periodically check and retighten the flange bolts to ensure proper sealing and joint integrity.
    • Follow the recommended torque values specified by the manufacturer.
  4. Reacting to Leaks:
    • If a leak is detected, inspect the gasket and flange surfaces for damage or misalignment.
    • Replace the gasket if necessary, and ensure proper alignment and tightening of the bolts.
  5. Seek Professional Assistance:
    • If troubleshooting becomes challenging or if major repairs are required, consult a qualified professional or contact the manufacturer for guidance.

Remember to refer to the specific instructions provided by the flange manufacturer for installation and maintenance, as they may have specific guidelines for their products.

Customer Testimonials

  1. “We have been using YANHAO’s 2″ pipe flanges for several years now, and we couldn’t be happier with their performance. The flanges are of exceptional quality and have provided us with reliable and leak-free connections. The technical support provided by the YANHAO team has been outstanding, helping us select the right flanges for our specific applications. We highly recommend YANHAO for their top-notch products and excellent customer service.” – John Smith, Engineering Manager
  2. “YANHAO’s 2″ pipe flanges have exceeded our expectations in terms of their durability and longevity. We operate in a harsh environment with high pressures and corrosive media, but the flanges have proven to be robust and resistant to corrosion. The installation process was seamless, thanks to the detailed instructions provided by YANHAO. We appreciate the quality and reliability of their products and will continue to choose YANHAO for our flange needs in the future.” – Emily Brown, Operations Supervisor
  3. “Working with YANHAO has been a game-changer for us. Their 2″ pipe flanges have not only met but exceeded our requirements in terms of performance and reliability. The team at YANHAO is knowledgeable, responsive, and always ready to assist with any technical queries or support we need. The flanges have proven to be a cost-effective solution for our piping systems, helping us achieve efficient operations without compromising on quality. We highly recommend YANHAO’s 2″ pipe flanges to other industry professionals.” – David Johnson, Project Engineer
  4. “We have been a loyal customer of YANHAO for many years, and their 2″ pipe flanges have never disappointed us. The quality of their products is top-notch, and they consistently deliver on-time, allowing us to meet project deadlines. The performance of the flanges has been exceptional, with no leaks or failures. YANHAO’s commitment to customer satisfaction and their ability to provide tailored solutions have made them our go-to supplier for all our flange requirements.” – Sarah Thompson, Procurement Manager

Contact Information

We encourage you to get in touch with us for any inquiries, requests for quotes, or further information.

Phone: +86 13313073735(same as WeChat)



Our dedicated team is ready to assist you and provide the information you need. Don’t hesitate to reach out to us, and we look forward to serving you.

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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