2025 Top 10 long neck flange Manufacturers in China

Introduction to Long Neck Flange

A long neck flange is a type of flange with an extended neck. This extended neck provides additional strength and stability, making it suitable for high - pressure and high - temperature applications. Long neck flanges are widely used in industries such as oil and gas, chemical, power generation, and shipbuilding. The long neck design helps to reduce stress concentration at the joint, improving the overall performance and reliability of the piping system. It also allows for better alignment during installation and provides a smooth transition for the flow of fluids or gases within the pipeline.

Top 10 Manufacturers

1. Henan Pipelink Industrial Co., Ltd.

Henan Pipelink Industrial Co., Ltd. is a leading manufacturer and supplier in the field of pipeline products, including long neck flanges. The company has a state - of - the - art manufacturing facility equipped with advanced production and testing equipment. They adhere to strict quality control systems to ensure that every long neck flange they produce meets international standards.

Features in Long Neck Flange Production

• Diverse Material Selection: Henan Pipelink offers long neck flanges made from a wide range of materials such as carbon steel, stainless steel, and alloy steel. This allows customers to choose the most suitable material according to their specific application requirements, whether it is for corrosive environments or high - strength applications.
• Customization Capability: The company has a professional R & D team that can customize long neck flanges according to customers' drawings and specifications. They can produce flanges with different sizes, pressure ratings, and connection types, providing flexible solutions for various projects.
• High - Precision Manufacturing: With advanced machining technology, Henan Pipelink can achieve high - precision dimensions for long neck flanges. This ensures a perfect fit and reliable connection in the piping system, reducing the risk of leakage and improving the overall efficiency of the system.

Company Advantages

• Rich Experience: Having been in the industry for many years, Henan Pipelink has accumulated rich experience in the production and supply of pipeline products. They understand the market demand and customer needs well, and can provide professional advice and solutions.
• Quality Assurance: The company has obtained various international quality certifications, which is a strong guarantee of the quality of their long neck flanges. They also have a complete after - sales service system to solve any problems that customers may encounter.
• Competitive Pricing: By optimizing the production process and supply chain management, Henan Pipelink can offer long neck flanges at competitive prices without sacrificing quality. This makes them a cost - effective choice for customers.

Website: https://www.cnpipelink.com/

2. Tianjin Pipe Group Corporation

Tianjin Pipe Group Corporation is a large - scale enterprise integrating steel production, pipe manufacturing, and product sales. It has a long - standing reputation in the domestic and international market.

Features in Long Neck Flange Production

• Integrated Production: As a comprehensive steel and pipe manufacturer, Tianjin Pipe Group has the advantage of integrated production. They can control the quality of raw materials from the source, ensuring the high - quality of long neck flanges. The company can produce long neck flanges from its own high - quality steel, which has stable chemical composition and mechanical properties.
• Large - Scale Production Capacity: With large - scale production facilities, Tianjin Pipe Group can meet large - volume orders of long neck flanges. They have a high - speed production line that can produce a large number of flanges in a short time, which is very suitable for large - scale infrastructure projects.
• Advanced Heat Treatment Technology: The company uses advanced heat treatment technology to improve the mechanical properties of long neck flanges. This can enhance the hardness, toughness, and corrosion resistance of the flanges, making them more suitable for harsh working environments.

Company Advantages

• Strong R & D Strength: Tianjin Pipe Group has a professional R & D team that continuously conducts research and development on new materials and production processes. They can keep up with the latest technological trends in the industry and develop high - performance long neck flanges.
• Good Brand Reputation: Over the years, Tianjin Pipe Group has established a good brand reputation in the market. Their products are widely recognized for their high quality and reliability, which gives customers more confidence when choosing their long neck flanges.
• Global Market Reach: The company has a wide sales network covering the global market. They can provide timely and efficient after - sales service to customers around the world, which is very important for international projects.

3. Baosteel Group Corporation

Baosteel Group is one of the largest and most advanced steel enterprises in China. It has a strong influence in the global steel industry.

Features in Long Neck Flange Production

• High - Quality Steel Base: Baosteel is famous for its high - quality steel products. The long neck flanges produced by Baosteel are made from its own high - grade steel, which has excellent purity and mechanical properties. This ensures that the flanges have high strength, good ductility, and strong corrosion resistance.
• Strict Quality Control: Baosteel has a strict quality control system throughout the production process of long neck flanges. From raw material inspection to finished product testing, every step is carefully monitored to ensure that the flanges meet the highest quality standards.
• Innovative Design: The company pays attention to product design innovation. Their R & D team uses advanced design software and simulation technology to optimize the structure of long neck flanges, improving their performance and reducing weight while maintaining strength.

Company Advantages

• Advanced Technology and Equipment: Baosteel is equipped with the most advanced steelmaking and processing equipment in the world. This allows them to produce long neck flanges with high precision and excellent surface quality.
• Comprehensive Service System: Baosteel provides a comprehensive service system for long neck flanges, including pre - sales consultation, product customization, on - time delivery, and after - sales service. They can meet all the needs of customers from different aspects.
• Industry Leadership: As an industry leader, Baosteel has a great influence on the development of the steel and pipe industry. Their long neck flanges often represent the highest level of quality and technology in the market, which is very attractive to high - end customers.

4. Shandong Shengdeyuan Pipe Co., Ltd.

Shandong Shengdeyuan Pipe Co., Ltd. is a specialized manufacturer focusing on pipeline products, including long neck flanges.

Features in Long Neck Flange Production

• Specialized Production Process: The company has developed a specialized production process for long neck flanges. They use a combination of forging and machining techniques to ensure the internal structure and surface quality of the flanges. The forging process can improve the density and strength of the material, while the machining process can achieve precise dimensions.
• Wide Range of Standards: Shandong Shengdeyuan can produce long neck flanges according to various international and domestic standards, such as ANSI, DIN, JIS, and GB. This makes their products more adaptable to different markets and customer requirements.
• Surface Treatment Options: They offer a variety of surface treatment options for long neck flanges, such as galvanizing, painting, and anti - corrosion coating. These treatments can effectively protect the flanges from corrosion and extend their service life.

Company Advantages

• Cost - Effective Solutions: Shandong Shengdeyuan can provide cost - effective long neck flanges by optimizing the production process and reducing production costs. They can offer competitive prices without compromising on quality, which is very attractive to price - sensitive customers.
• Fast Delivery Time: With efficient production management and a well - organized supply chain, the company can ensure fast delivery of long neck flanges. This is very important for projects with tight schedules.
• Good Customer Service: The company has a dedicated customer service team that can provide timely response and solutions to customers' inquiries and problems. They focus on building long - term relationships with customers.

5. Zhejiang Jiansheng Group Co., Ltd.

Zhejiang Jiansheng Group is a diversified enterprise with a strong presence in the manufacturing industry.

Features in Long Neck Flange Production

• Multi - Material Production: Zhejiang Jiansheng can produce long neck flanges from different materials, including carbon steel, stainless steel, and non - ferrous metals. This enables them to meet the diverse needs of different industries, such as food processing, pharmaceutical, and marine engineering.
• Advanced Welding Technology: For long neck flanges that require welding, the company uses advanced welding technology. Their welders are highly skilled and certified, ensuring the quality and reliability of the welded joints.
• Product Testing and Certification: Zhejiang Jiansheng conducts strict product testing on long neck flanges, including non - destructive testing, mechanical property testing, and chemical composition analysis. They also obtain relevant international certifications to prove the quality of their products.

Company Advantages

• Diversified Business Model: The company's diversified business model allows them to share resources and technologies among different product lines. This can bring more innovative ideas and solutions to the production of long neck flanges.
• Strong Financial Support: With strong financial strength, Zhejiang Jiansheng can invest in advanced equipment and R & D projects. This helps them to continuously improve the quality and performance of long neck flanges.
• Good Market Reputation: The company has a good market reputation for its high - quality products and reliable service. Their long neck flanges are well - received by customers in both domestic and international markets.

6. Jiangsu Shentong Valve Co., Ltd.

Jiangsu Shentong Valve is a well - known enterprise in the valve and pipeline industry.

Features in Long Neck Flange Production

• Valve - Flange Integration: As a valve manufacturer, Jiangsu Shentong has the advantage of integrating long neck flanges with valves. They can provide complete valve - flange systems, ensuring better compatibility and performance between the two components.
• High - Pressure Resistance Design: The company focuses on the design of long neck flanges for high - pressure applications. Their flanges are designed to withstand high pressure and temperature, which is very suitable for industries such as oil and gas and power generation.
• Continuous Improvement: Jiangsu Shentong continuously improves its production process and product quality based on customer feedback and market demand. They are committed to providing the best long neck flanges to customers.

Company Advantages

• Technical Expertise in Valves and Flanges: The company's technical expertise in both valves and flanges allows them to provide more comprehensive solutions. They can offer professional advice on the selection and installation of long neck flanges in valve systems.
• Quality - Oriented Culture: Jiangsu Shentong has a strong quality - oriented culture. Every employee is aware of the importance of quality, which is reflected in every aspect of the production of long neck flanges.
• Long - Term Industry Experience: With long - term experience in the industry, the company has a deep understanding of the market and customer needs. They can quickly respond to market changes and provide appropriate products and services.

7. Hebei Feixiang Pipe Fittings Co., Ltd.

Hebei Feixiang is a professional manufacturer of pipe fittings, including long neck flanges.

Features in Long Neck Flange Production

• Small - Batch Customization: The company is good at small - batch customization of long neck flanges. They can produce flanges according to customers' unique requirements, even for small - quantity orders. This is very suitable for some special projects or R & D institutions.
• Flexible Production Schedule: Hebei Feixiang has a flexible production schedule. They can adjust the production plan according to customers' urgent needs, ensuring timely delivery of products.
• Cost - Saving Production Methods: The company uses cost - saving production methods without sacrificing quality. They optimize the production process and use local raw materials to reduce production costs, which can be passed on to customers in the form of lower prices.

Company Advantages

• Local Resource Advantage: Hebei Feixiang is located in an area rich in raw material resources. This allows them to obtain high - quality raw materials at a lower cost, which is beneficial for the production of long neck flanges.
• Personalized Service: The company provides personalized service to each customer. They communicate closely with customers to understand their needs and provide customized solutions.
• Good Industry Reputation: Hebei Feixiang has established a good reputation in the industry for its high - quality products and reliable service. They have a large number of repeat customers.

8. Guangdong Yuexin Steel Pipe Co., Ltd.

Guangdong Yuexin is a leading steel pipe and pipe fitting manufacturer in southern China.

Features in Long Neck Flange Production

• Corrosion - Resistant Coating Technology: The company has developed advanced corrosion - resistant coating technology for long neck flanges. Their coatings can effectively protect the flanges from corrosion in humid and corrosive environments, such as coastal areas and chemical plants.
• Environmental - Friendly Production: Guangdong Yuexin pays attention to environmental protection in the production process of long neck flanges. They use environmentally friendly materials and production methods to reduce the impact on the environment.
• Product Standardization: The company adheres to strict product standardization in the production of long neck flanges. This ensures the interchangeability and compatibility of their products, which is very convenient for customers during installation and maintenance.

Company Advantages

• Geographical Location Advantage: Located in southern China, Guangdong Yuexin has convenient transportation and access to international markets. This allows them to quickly deliver long neck flanges to customers at home and abroad.
• Strong R & D on Corrosion Resistance: The company's strong R & D focus on corrosion - resistant technology makes their long neck flanges stand out in the market. They can provide long - term corrosion protection solutions for customers.
• Industry - University - Research Cooperation: Guangdong Yuexin cooperates with universities and research institutions to introduce the latest scientific research results into the production of long neck flanges. This helps them to continuously improve product performance.

9. Liaoning Hongye Pipe Fittings Co., Ltd.

Liaoning Hongye is a well - established manufacturer of pipe fittings in northeastern China.

Features in Long Neck Flange Production

• Cold - Forming Technology: The company uses cold - forming technology in the production of long neck flanges. This technology can improve the mechanical properties of the flanges without changing the chemical composition of the material. It also has the advantage of high precision and good surface finish.
• Low - Temperature Resistance Design: Considering the cold climate in northeastern China, Liaoning Hongye focuses on the design of long neck flanges with low - temperature resistance. Their flanges can maintain good performance in low - temperature environments, which is suitable for industries in cold regions.
• Quality Traceability System: The company has established a complete quality traceability system for long neck flanges. From raw material procurement to product delivery, every step can be traced, which ensures the quality control and after - sales service.

Company Advantages

• Regional Industry Cluster Advantage: Liaoning Hongye benefits from the regional industry cluster in northeastern China. They can share resources and technologies with other related enterprises, which is conducive to the improvement of production efficiency and product quality.
• Rich Experience in Cold - Region Applications: The company's long - term experience in producing products for cold regions gives them unique insights into the design and production of long neck flanges for low - temperature environments.
• Good After - Sales Service: Liaoning Hongye provides good after - sales service. They can quickly respond to customers' problems and provide on - site maintenance and repair services if necessary.

10. Fujian Longxiang Precision Casting Co., Ltd.

Fujian Longxiang is a professional precision casting enterprise.

Features in Long Neck Flange Production

• Precision Casting Process: The company uses precision casting technology to produce long neck flanges. This process can achieve complex shapes and high - precision dimensions, which is suitable for some special - shaped long neck flanges.
• High - Quality Surface Finish: Precision casting can result in a high - quality surface finish of long neck flanges. This not only improves the appearance of the flanges but also reduces the risk of corrosion and leakage.
• Alloy Material Casting: Fujian Longxiang can cast long neck flanges from various alloy materials. Alloy materials can provide better performance in terms of strength, heat resistance, and corrosion resistance, which is suitable for high - end applications.

Company Advantages

• Advanced Casting Equipment: The company is equipped with advanced casting equipment, which can ensure the quality and efficiency of the casting process. They can produce long neck flanges with high - quality and large - scale production.
• Technical Innovation in Casting: Fujian Longxiang continuously conducts technical innovation in the casting process. They can develop new casting techniques to improve the performance and quality of long neck flanges.
• Good Industry Reputation in Precision Casting: The company has a good reputation in the precision casting industry. Their long neck flanges are well - recognized for their high - precision and high - quality, which makes them a preferred choice for some high - end customers.

Conclusion

The above - mentioned 10 manufacturers are among the top long neck flange manufacturers in China in 2025. Each of them has its own unique features and advantages in long neck flange production. Some focus on high - quality materials and advanced technology, while others are good at customization and cost - effective solutions. Whether it is large - scale infrastructure projects or small - batch special applications, these manufacturers can provide suitable long neck flanges. With the continuous development of the industry, these manufacturers will also continue to innovate and improve, meeting the ever - changing market demand and promoting the development of the long neck flange industry in China and around the world.