Flanges play a crucial role in pipeline systems, serving as the connection point between pipes. They provide a secure and leak-free connection, allowing for the efficient flow of liquids, gases, and other substances. Flanges are essential in industries such as oil, gas, chemical, power, and more.

When it comes to customizing large-size flanges for your specific project requirements, it is vital to rely on a manufacturer with expertise and trustworthiness. This is where Hebei Yanhao Pipeline Equipment Co., Ltd. (盐浩YANHAO) comes in. With years of experience in the industry, Yanhao is a leading China flange manufacturer and supplier of pipeline connection products.


Yanhao offers a comprehensive range of pipeline connection products, including flanges, fittings, valves, and pipes. Their products are manufactured using high-quality materials and undergo stringent quality control measures to ensure reliability and durability.

As a trusted manufacturer and supplier, Yanhao understands the unique requirements and challenges associated with customizing large-size flanges. They have the expertise to provide precise solutions that meet your project specifications, ensuring optimal performance and safety.

In the following sections, we will explore the process of customizing large-size flanges in more detail. We will discuss the industry standards that govern flange specifications and their application. Additionally, we will delve into Yanhao’s manufacturing capabilities and highlight customer success stories to showcase their commitment to excellence.

Understanding Large-Size Flanges:

Large-size flanges refer to flanges with larger dimensions, typically used in pipelines with larger diameters. These flanges are essential in various industries, including oil, gas, chemical, power, and more, where large-scale operations require efficient and reliable pipeline systems.

Customizing large-size flanges presents unique requirements and challenges compared to standard-size flanges. The larger dimensions and higher pressure and temperature capabilities call for specialized design and manufacturing considerations. These include:

  1. Material Selection: Large-size flanges must be made from materials that can withstand high pressures, temperatures, and corrosive environments. Stainless steel, alloy steel, and carbon steel are commonly used for their strength, durability, and resistance to corrosion.
  2. Structural Integrity: The design and manufacturing of large-size flanges require careful consideration of structural integrity. Factors such as flange thickness, reinforcement, and sealing mechanisms must be accurately calculated to ensure the flange can handle the stress and load placed upon it.
  3. Precision Machining: The larger dimensions of these flanges demand precision machining techniques. Accurate alignment of bolt holes, smooth surfaces for effective sealing, and tight tolerances for proper fit are crucial for reliable and leak-free connections.
  4. Installation Challenges: Installing large-size flanges can be challenging due to their weight, size, and bulk. Meticulous planning, the use of appropriate lifting and installation equipment, and skilled personnel are necessary to ensure safe and efficient installation.

Given the critical role of flanges in pipeline systems, expertise and precision are paramount in both the manufacturing and installation processes. Manufacturers like Yanhao, with their experience and knowledge, possess the skills to address these challenges and deliver customized large-size flanges that meet the highest industry standards.

Navigating Industry Standards:

In the world of flanges, several internationally recognized standards govern their specifications and dimensions. Some of the most commonly used standards include the American National Standards Institute (ANSI), Deutsches Institut für Normung (DIN), and Japanese Industrial Standards (JIS). These standards ensure compatibility, reliability, and safety in flange connections across different industries.

ANSI standards, particularly ANSI B16.5 and ANSI B16.47, are widely adopted in North America. These standards define flange dimensions, facing types, pressure ratings, and materials for both raised face (RF) and ring-type joint (RTJ) flanges.

DIN standards, such as DIN 2631/2632/2633/2634/2635/2636/2637/2638, are commonly used in Europe. They specify dimensions, materials, and pressure ratings for flanges in industries such as oil, gas, and petrochemical.

JIS standards, specifically JIS B2220, are prevalent in industries in Japan and Asia. These standards outline dimensions, facing types, pressure ratings, and materials for flanges used in a variety of applications.

Apart from these recognized standards, flanges can also be manufactured to non-standard specifications. This may involve customization based on specific project requirements and unique operating conditions.

Compliance with industry standards is crucial to ensure the compatibility, reliability, and safety of flange connections. Following these standards guarantees that flanges from different manufacturers can be used interchangeably, promoting efficiency and versatility in pipeline systems. Conformance to standards also simplifies the selection and procurement process, as products can be specified based on known performance and compatibility.

Furthermore, adherence to quality control measures and certification standards is essential. Manufacturers like Yanhao implement rigorous quality control processes throughout their production cycle, including material inspection, dimensional checks, and pressure testing. Additionally, certifications such as ISO 9001:2015 and API 6A demonstrate the manufacturer’s commitment to maintaining high-quality products and processes.

By adhering to industry standards and implementing stringent quality control measures, manufacturers like Yanhao ensure that their flanges meet the necessary requirements for compatibility, reliability, and safety in pipeline systems.

Application of Industry Standards:

Selecting the appropriate industry standard for flanges involves considering project requirements, including temperature, pressure, and the medium being transported. Here is a general process for selecting the right standard:

  1. Identify Project Parameters: Determine the project requirements, including the size, pressure rating, facing type, and material compatibility needed for the flange.
  2. Consider Temperature and Pressure: Assess the operating temperature and pressure conditions to determine the appropriate standard. Some standards have higher pressure and temperature ratings than others, ensuring the flange can withstand specific project conditions.
  3. Assess Medium Compatibility: Evaluate the nature of the medium being transported, such as oil, gas, chemicals, or water. Certain standards may have specific material requirements or design features for handling corrosive or high-temperature mediums.
  4. Consult Industry Standards: Refer to internationally recognized standards such as ANSI, DIN, or JIS and select the one that aligns with the project parameters, temperature, pressure, and medium requirements.

Flanges can be manufactured using different materials, each with its own advantages and applications. Here are some commonly used materials in our product portfolio:

  1. Stainless Steel: Stainless steel flanges are ideal for applications requiring resistance to corrosion, high temperatures, and chemicals. They are commonly used in industries such as oil, gas, chemical, and food processing where reliability and durability are paramount.
  2. Alloy Steel: Alloy steel flanges exhibit excellent strength, hardness, and resistance to extreme temperatures and pressures. They are suitable for high-stress applications in industries such as power generation, petrochemical, and offshore drilling.
  3. Carbon Steel: Carbon steel flanges offer good strength and toughness at an affordable cost. They find extensive use in industries like oil, gas, and water distribution where moderate temperatures and pressures are involved.

As a leading China flange manufacturer, Hebei Yanhao Pipeline Equipment Co., Ltd. offers the ability to customize flanges based on specific material requirements. We have expertise in working with stainless steel, alloy steel, carbon steel, and other materials to meet the unique demands of each project. Our customization capabilities enable us to provide flanges that are tailored to specific applications, ensuring optimal performance, compatibility, and reliability in various industries.

Expertise and Manufacturing Capabilities:

Hebei Yanhao Pipeline Equipment Co., Ltd. (盐浩YANHAO) prides itself on its advanced production equipment and testing facilities, allowing us to deliver high-quality flanges that meet industry standards and customer requirements.

  1. Advanced Production Equipment: We have state-of-the-art production equipment, including CNC machines, automatic welding machines, and hydraulic presses. These machines enable precise and efficient manufacturing processes, ensuring consistent quality and dimensional accuracy in our flanges.
  2. Large-Size Flange Production: We have specialized capabilities to manufacture large-size flanges, which can be challenging for many other manufacturers. Our production capacity extends up to 5000mm in diameter, enabling us to cater to a wide range of industrial applications that require oversized flanges.
  3. Complete Quality Management System: At Hebei Yanhao, we have a complete quality management system in place. This system encompasses quality control procedures at every stage of the manufacturing process, from material inspection to final product testing and packaging. By adhering to strict quality control measures, we ensure that our flanges meet the required standards and specifications.
  4. Dedicated Testing Department: We have a dedicated testing department equipped with advanced testing facilities. These facilities include non-destructive testing (NDT) methods such as ultrasonic testing, radiographic testing, and magnetic particle testing. Our testing department ensures that all flanges undergo comprehensive inspection to detect any defects and ensure product excellence and safety.
  5. Certifications and Compliance: Hebei Yanhao complies with international standards and holds certifications such as ISO 9001:2015 and API 6A. These certifications demonstrate our commitment to maintaining a high standard of quality in our manufacturing processes.

By combining advanced production equipment, specialized capabilities, a complete quality management system, and dedicated testing facilities, Hebei Yanhao Pipeline Equipment Co., Ltd. ensures the production of flanges that meet the highest standards of excellence, reliability, and safety.

Customer Success Stories:

Customer Success Story 1:
“We have been working with Hebei Yanhao for several years and have been extremely satisfied with their flanges. Their team understood our specific requirements for large-size flanges and provided us with customized solutions. The flanges they supplied have consistently met our quality standards and have performed excellently in our applications. Their commitment to customer satisfaction and willingness to go the extra mile sets them apart from other suppliers. We highly recommend Hebei Yanhao for their exceptional quality, expertise, and outstanding customer service.” – A satisfied customer from the oil and gas industry.

Customer Success Story 2:
“Hebei Yanhao has been our trusted flange supplier for many years. They have proven their expertise in delivering large-size flanges that perfectly meet our project requirements. Their manufacturing capabilities and attention to detail have allowed us to overcome the challenges of working with oversized flanges. We are impressed with their ability to customize flanges according to our specific material requirements and standards. The quality and reliability of their products have exceeded our expectations time and again. We appreciate their dedication to delivering high-quality flanges and their commitment to customer satisfaction.” – A satisfied customer from the power generation industry.

Customer Success Story 3:
“As a company in the chemical processing industry, we have stringent requirements for flanges that can handle corrosive and high-temperature mediums. We turned to Hebei Yanhao for their expertise in stainless steel flanges. They provided us with excellent quality stainless steel flanges that have performed exceptionally well in our operations. We are impressed with their ability to customize flanges based on our specific needs. Hebei Yanhao’s commitment to delivering reliable and high-quality products has made them our preferred supplier. We highly recommend their flanges and services to other industries with similar requirements.” – A satisfied customer from the chemical processing industry.

At Hebei Yanhao Pipeline Equipment Co., Ltd., our primary focus is always on customer satisfaction. We pride ourselves on our ability to meet specific customization requirements, including those for large-size flanges. We have a track record of successfully delivering comprehensive solutions that align with customer needs in various industries and regions.

We are committed to providing high-quality products that meet stringent industry standards. Our dedication to quality control and adherence to international certifications ensures that our flanges consistently meet and exceed customer expectations. Our goal is to build long-term relationships with our customers by delivering reliable, durable, and customized flanges that contribute to their success.


In the pipeline industry, efficient connections are crucial for the safe and reliable transportation of fluids and gases. Customizing large-size flanges plays a significant role in achieving optimal performance and ensuring a seamless pipeline system. When working with oversized flanges, it is essential to collaborate with a trusted supplier that has the expertise and capabilities to meet specific customization requirements.

At Hebei Yanhao Pipeline Equipment Co., Ltd., we have established ourselves as a leading authority in the production of large-size flanges. Our advanced production equipment, extensive testing facilities, and dedicated team enable us to deliver high-quality flanges that exceed customer expectations. We take pride in our ability to customize flanges according to unique project requirements, including material specifications and industry standards.

When you choose Hebei Yanhao as your flange supplier, you can trust that you are partnering with a company that prioritizes customer satisfaction and product excellence. Our track record of success and satisfied customers from various industries is a testament to our expertise and reliability.

If you require personalized assistance or customized solutions for large-size flanges or any other pipeline equipment, we encourage you to reach out to our knowledgeable team. We are here to listen to your specific needs, provide expert guidance, and deliver high-quality products that meet your requirements. Contact Hebei Yanhao Pipeline Equipment Co., Ltd. today and experience our commitment to excellence firsthand.

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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