Introduction to ANSI/ASME B16.5 Flanges
ANSI/ASME B16.5 is a widely recognized standard developed by the American National Standards Institute (ANSI) and the American Society of Mechanical Engineers (ASME). This standard covers pipe flanges and flanged fittings made from cast or forged materials, as well as blind flanges and certain reducing flanges in sizes NPS 1/2 through NPS 24. The flanges designed according to this standard are used in various industries, including oil and gas, chemical, power generation, and water treatment. They ensure proper connection, alignment, and sealing of pipes, valves, and other equipment, providing reliable and safe operation in different working conditions. ANSI/ASME B16.5 Flanges

1. Zhejiang Chengjiu Pipeline Co., Ltd.
Zhejiang Chengjiu Pipeline Co., Ltd. is a well – established company in the pipeline and flange manufacturing industry. With years of experience, it has built a solid reputation for producing high – quality flanges. The company is committed to strict quality control throughout the production process, from raw material selection to the final product inspection. It has a professional R & D team that continuously improves the product design and manufacturing technology to meet the changing market demands.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- High – quality materials: The company sources high – grade raw materials, ensuring the durability and corrosion – resistance of the ANSI/ASME B16.5 flanges.
- Precision manufacturing: Advanced production equipment and skilled workers enable the company to produce flanges with high precision, meeting the strict dimensional requirements of the standard.
- Customization ability: It can provide customized flanges according to customers’ special requirements, such as different sizes, materials, and surface treatments.
- Good after – sales service: The company offers comprehensive after – sales support, including technical consultation and product replacement in case of quality issues.
- Website: https://www.cncjflange.com/
2. Hebei Haihao Group
Hebei Haihao Group is a large – scale integrated enterprise in the pipeline industry. It was founded many years ago and has extensive experience in the production of various pipeline products, including ANSI/ASME B16.5 flanges. The group has a vast production base with complete production lines and advanced testing equipment. It has established a wide – reaching sales network both at home and abroad.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Large production capacity: The company can handle large – volume orders efficiently, ensuring timely delivery.
- Global certification: It holds multiple international certifications, which proves the high – quality of its products and makes it more competitive in the global market.
- Rich product categories: Besides standard ANSI/ASME B16.5 flanges, it also offers various related products, providing one – stop shopping for customers.
- Cost – effective: Through efficient management and mass production, the company can offer high – quality flanges at relatively low prices.
3. Ningbo Xingye Shengda Non – Ferrous Metal Co., Ltd.
This company is a well – known player in the metal products industry. It has strong technical strength and advanced production facilities. The company focuses on research and development, constantly innovating and improving its products. It has a strict quality management system to ensure product consistency and reliability.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Special material applications: The company has expertise in using special non – ferrous metals for flanges, which can offer better performance in specific environments, such as high – temperature or corrosive conditions.
- Strong R & D strength: It can develop new types of ANSI/ASME B16.5 flanges to meet the emerging market needs.
- Excellent surface finish: The flanges produced by the company have a smooth surface finish, which is beneficial for sealing and connection.
- Good adaptability: Its products can adapt to a wide range of working pressures and temperatures.
4. Jiangsu Shentong Valve Co., Ltd.
Jiangsu Shentong Valve Co., Ltd. is a professional enterprise mainly engaged in valve and flange manufacturing. It has a long – standing history in the industry and a good brand image. The company emphasizes product quality and technological innovation, and has a team of experienced engineers and technicians.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Integrated production: The company can produce both valves and flanges, which can provide better – matched products for pipeline systems, ensuring good overall performance.
- Advanced technology: It applies advanced manufacturing technology and processes, such as precision machining and heat treatment, to improve the quality of flanges.
- Strict quality inspection: Every flange undergoes a series of strict inspections to ensure compliance with the ANSI/ASME B16.5 standard.
- Good industry reputation: Its products are widely recognized in the industry, which gives customers more confidence in purchasing.
5. Shandong Taishan Steel Group Co., Ltd.
Shandong Taishan Steel Group Co., Ltd. is a large – scale steel enterprise with a comprehensive production system. It has strong production capabilities and a stable supply of raw materials. The company adheres to the principle of high – quality development and has a complete quality control system.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Stable raw material supply: As a steel enterprise, it can ensure a stable supply of high – quality steel for flange production, reducing the risk of material shortages.
- High – strength flanges: The flanges made from its steel materials have high strength, which can withstand high – pressure and high – load working conditions.
- Environmental – friendly production: The company pays attention to environmental protection in the production process, which is in line with the modern development trend.
- Comprehensive service: It provides comprehensive services, including pre – sales consultation, product delivery, and after – sales maintenance.
6. Tianjin Pipe (Group) Corporation
Tianjin Pipe (Group) Corporation is a well – known enterprise in the pipe industry. It has advanced production technology and a large – scale production base. The company has a wide range of product lines and is committed to providing high – quality products for different industries.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Pipe – flange integration: Since it is also a major pipe producer, it can better coordinate the production of pipes and flanges, ensuring seamless connection in pipeline systems.
- Large – scale production: The company’s large – scale production capacity allows for cost – effective production of ANSI/ASME B16.5 flanges.
- Advanced testing methods: It uses advanced non – destructive testing and other inspection methods to ensure the internal quality of flanges.
- International market experience: With rich experience in the international market, the company can better meet the requirements of global customers.
7. Guangzhou Panyu Jinlong Machinery Co., Ltd.
This company focuses on the production of mechanical products, including flanges. It has a professional production team and a well – organized production process. The company is customer – oriented and attaches great importance to product quality and service.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Flexible production: It can quickly adjust the production plan according to customers’ small – batch and urgent orders.
- Good communication with customers: The company has a good communication mechanism with customers, ensuring that customers’ needs are accurately understood and met.
- In – house quality control: It has a strict in – house quality control system to avoid quality problems from the source.
- Competitive pricing: Through efficient management and cost – control, it can offer competitive prices for its flanges.
8. Xi’an Nuclear Equipment Co., Ltd.
Xi’an Nuclear Equipment Co., Ltd. has a high – level manufacturing technology and a strong R & D ability. It is mainly engaged in the production of equipment for the nuclear industry and other high – end industries. The company has strict quality control requirements due to the high – risk nature of the industries it serves.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- High – end quality: The flanges produced by the company meet high – end quality requirements, which are suitable for critical applications, such as nuclear power plants and high – precision industrial facilities.
- Stringent quality management: It follows a very strict quality management system, from design to production and testing, ensuring the reliability of flanges.
- R & D innovation: The company’s continuous R & D efforts lead to the development of more advanced and reliable ANSI/ASME B16.5 flanges.
- Technical support: It can provide strong technical support to customers, helping them solve various technical problems.
9. Shanghai KSB Pumps Co., Ltd.
Although mainly known for pump manufacturing, Shanghai KSB Pumps Co., Ltd. also has expertise in producing related components such as flanges. The company has a long – standing reputation for high – quality products and reliable operation in the pump industry.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Pump – flange matching: The flanges are designed to be well – matched with the company’s pumps, ensuring a perfect fit in the overall system.
- High – reliability design: The design of the flanges takes into account the long – term and stable operation of the pump system, providing high reliability.
- After – sales service integration: Customers can get integrated after – sales service for both pumps and flanges, which is very convenient.
- Quality – proven by the pump industry: The high – quality requirements of the pump industry have made the company’s flanges have excellent quality and performance.
10. Wuxi Hongsheng Precision Forging Co., Ltd.

This company specializes in precision forging products, including ANSI/ASME B16.5 flanges. It has advanced forging equipment and a professional forging process. The company has a high – level production and management team.
Features and Advantages in ANSI/ASME B16.5 Flanges:
- Precision forging technology: The use of precision forging technology can produce flanges with high – density structure and excellent mechanical properties.
- Custom – forging ability: It can provide custom – forging services according to customers’ unique design requirements, creating one – of – a – kind flanges.
- High – efficiency production: The advanced equipment and process enable the company to produce flanges with high efficiency, reducing the production cycle.
- Cost – effective forging: Through efficient forging production, it can offer cost – effective flanges compared to some other manufacturing methods.
BW Pipe Fittings In conclusion, these 10 leading suppliers in China play an important role in the global ANSI/ASME B16.5 flanges market. Each company has its own unique features and advantages, providing customers with a wide range of choices to meet different needs.