Top 10 Flange Manufacturers in 2023

1. Wuxi Flange

Country: China

Founded: 1984

About the company:

Founded in 1984, Wuxi Flange Forging Co., Ltd. is a subsidiary of Jiangsu Shentong Valve Co., Ltd. (stock code: 002438), mainly engaged in the manufacturing, processing and research and development of flanges and petrochemical equipment accessories.

It is one of the earliest and large-scale professional manufacturers of flange production and pressure vessel forgings in China.

The company covers an area of 78000 square meters, including 39000 square meters of building area.

It has nearly 400 employees, including more than 170 engineering technicians with college degree or above, and has fixed assets of nearly 100 million yuan.

The company mainly produces forged steel flanges of various materials and steel forgings for boilers and pressure vessels as well as machinery and ship moving parts according to international and domestic standards.

The products are widely used in petrochemical industry, electric power (nuclear power, wind power, thermal power), light industry, machinery, metallurgy, ships and other fields.

The “Wuxi Flange” brand enjoys a high reputation in China.

The company has a complete organization, with more than ten departments and workshops, including the Manager’s Office, the Finance Department, the Human Resources Department, the Sales Department, the Procurement Department, the Manufacturing Department, the Technology Department, the Quality Assurance Department, the Quality Inspection Department, the Equipment Department, the Security Department, the forging workshop, the heat treatment workshop, the blanking workshop, the metalworking workshop, the steel warehouse, and the finished product warehouse.

The company has excellent production equipment. Now it has five forging equipment, including a 3600 ton forging press, a φ6300 mm CNC ring mill, a 1.5 ton air hammer, two one ton air hammers, seven natural gas heating furnaces for forging, 16 industrial resistance furnaces for heat treatment, and more than 80 metal processing equipment, of which the larger one is a five meter CNC vertical lathe.

The annual output of 50000 tons of medium and high pressure flanges and various boilers Manufacturing capacity of steel forgings for pressure vessels.

The larger pressure of the produced flange can reach 2500L, the larger diameter can reach about 6m, and the larger single piece weight can reach 30t.

The company has relatively complete physical and chemical facilities, more than 30 sets of advanced instruments such as universal material testing machines, impact testing machines, spectrometers, ultrasonic flaw detectors, and a high-quality, multi category quality assurance management team.

It has formed a complete set of testing methods and quality management systems from raw materials to finished products, providing a stable guarantee to meet product quality.

The company has always followed the quality policy of providing customers with quality products and considerate services, adhered to the corporate purpose of “unity, truth-seeking, diligence and innovation”, and scrupulously adhered to its reputation.

Over the years, the company has provided a large number of flanges and steel forgings for boilers and pressure vessels for Sinopec, PetroChina, CNOOC and other large petrochemical companies and their supporting manufacturers of boilers and pressure vessels.

In particular, the successful development of various high-pressure flanges has ended the situation that various domestic high-pressure flanges rely on imports, saved foreign exchange for the country, saved construction time, and made positive contributions to the localization of flanges.

Since 2003, the company has provided a large number of flange products for domestic large-scale petrochemical new and expansion projects, such as Nanjing Yangba, Shanghai Secco, Hainan Refinery Extension, Lanzhou Daye, Guangzhou Petrochemical Hydrogenation, Dalian Refinery, Qingdao Refinery, Fujian Refinery, Huizhou Refinery, Dushanzi Refinery Ethylene, Guangxi Petrochemical Hydrogenation, Fushun Ethylene Refinery, Jinzhou Petrochemical Hydrogenation, Sichuan Petrochemical Refinery, Dalian Hengli PTA, Zhejiang Petrochemical, etc, It has been well received by customers.

In 1999, the company’s products successfully entered the nuclear power field and became suppliers of flanges and forgings for Qinshan Phase II Project.

Since 2006, it has provided a large number of nuclear grade products for Ling’ao Phase II, Qinshan Phase II expansion of Pakistan C2, Hongyanhe, Ningde, Yangjiang, Fangjiashan, Fuqing, Taishan, Fangchenggang, Sanmen, Haiyang and other nuclear power projects, becoming the main supplier of nuclear grade flanges of China Nuclear Corporation, China Guangdong Nuclear Corporation and China National Nuclear Corporation.

After years of precipitation and accumulation, the company has unique advantages in large diameter flange, high pressure flange, low temperature steel flange, hydrogen resistant steel flange, dual phase steel flange, nuclear power flange, nickel base alloy and other special steel flanges, and is ahead of the domestic peers in terms of manufacturing process and detection means.

2. Guanjiaying

Country: China

Founded: 1988

About the company:

Shanxi Guanjiaying Flange Forging Co., Ltd. is a private joint-stock enterprise specializing in the production of forged steel flanges and various forgings.

It was founded in 1988. After years of development and technical transformation, its annual production capacity has reached 30000 tons.

The company covers an area of more than 260000 square meters, employs more than 500 people, including more than 50 people with senior and intermediate professional titles, with a total investment of more than 350 million yuan.

It has more than 300 sets of production equipment, which can produce flange products of various national and industrial standards, non-standard flanges, and forged parts with a weight of less than 35 tons.

The size range is from DN15 to DN5000, and the pressure rating reaches 3000LBS.

The company is a supplier to customers such as PetroChina, Sinopec, CNOOC, Shell and Shenhua Group.

3. Hengrun

Country: China

Founded: 2003

About the company:

Jiangyin Hengrun Heavy Industry Co., Ltd. (SH603985), founded in July 2003, is a precision machinery manufacturer that can provide customers with one-stop services of design, forging and finishing.

The company now has more than 800 employees, with sales volume of 2384.51 million yuan in 2020, including 347.24 million yuan for self export.

Hengrun is committed to building a high-end precision machinery manufacturer with international reputation.

It has carried out in-depth cooperation with world industry giants such as Siemens, GE, Emerson, Dan Mai Vestas, Shanghai Electric, Yantai Wanhua, CGN, Sinopec, and has successively won the honorary title of “Excellent Supplier” from Siemens, GE, Emerson, China Nuclear 23 Construction, and many other companies.

The company’s products cover wind power flanges, gas turbine components, nuclear power components, semiconductor equipment, pressure vessels, offshore oil and gas equipment, etc. Especially in the field of offshore wind power flange, Hengrun has entered the industry precedent.

The company has large hydraulic press and CNC ring milling machine, and has mastered the mature forging, ring milling and heat treatment technologies of medium and large ring forgings.

It can produce various types of ring forgings with a diameter of less than 8 meters;

It has introduced world-class machining centers, turning milling compound and other high-end precision equipment and testing equipment from Germany, the United States, Spain and other countries, and has mastered the deep processing technology of various precision mechanical parts.

It is a rare company in the industry that has mastered both forging and deep processing technology.

The company passed the TUV Rhine “1S09001” quality system certification in October 2003;

After that, they successively obtained “PED” certification (EU Pressure Equipment EC Directive), “China Special Equipment Manufacturing Qualification License (Pressure Pipeline)”, “Japan JIS Certification” and other qualification certificates in the pressure vessel industry;

Qualification certificates of wind power industry such as EU “CPR”, “EN1090” and Japan “JIS”;

European nuclear power “KTA” certificate and deep-sea oil and gas M650 certificate;

Accreditation certificates issued by the world’s nine major classification societies, such as ABS, BV, CCS, DNV, GL, KR, LR, NK and RNA;

At the same time, the company has entered the supplier system of Sinopec and PetroChina;

It provides a solid guarantee for the company’s sustainable development.

The company attaches great importance to technology R&D and product development, and has established an industry university research institute with well-known universities to jointly build research and development institutions such as “Jiangsu Engineering Technology Center” and “Jiangsu Enterprise Technology Center”.

As of July 2021, the Company has obtained 74 patents, including 35 invention patents and 39 utility model patents. In addition, 32 technologies have applied to the State Intellectual Property Office for invention patents, and has obtained acceptance notices.

The Company has successively won such honorary titles as Jiangyin Science and Technology Progress Award and Wuxi Patent Gold Award.

In the future, the company will introduce high-quality talents, actively invest in the research and development of new projects and technologies, constantly accelerate the industrialization of scientific and technological achievements, and enhance the core competitiveness of the enterprise on the basis of fully doing market research.

4. Shanxi Tianbao group

Country: China

About the company:

Shanxi Tianbao Group Co., Ltd. is famous for forging products in the world.

Its headquarters is located in Beiguan Industrial Zone, Dingxiang County, the hometown of manufacturing in China.

It mainly produces various kinds of forging products such as wind power, pressure vessel pipes, bearings, gear rings, mechanical accessories and so on, using a variety of advanced forging processes such as free forging, die forging, ring forging.

In September 2014, the newly invested subsidiary Shanxi Tianbao Group New Energy Development Co., Ltd. was officially put into operation, and the wind power tower has been installed and used in the wind farm.

The company has a total assets of 450 million yuan, covers an area of 135000 square meters, a building area of 65000square meters, 500 employees, 83 technical talents in oil pressure, ring rolling, physical and chemical, flaw detection, forging, machining, tower manufacturing, etc., a full speed cone roll ring grinder with a diameter of 7000 mm and 5000 mm, a 3600 ton oil press, more than 140 CNC lathes, CNC drilling machines, tower manufacturing equipment, and a physical and chemical laboratory.

It can produce 50000 tons of wind power tower flange and door frame flange, 10000 tons of pressure vessel flange, pipeline flange and forgings, and 300 sets of wind power tower every year.

The company’s products have entered the procurement list of 38 large enterprise groups at home and abroad, and has established strategic cooperation relationships with 5 major national power companies, 6 major fan manufacturers, more than 30 large domestic and foreign related enterprises, pressure vessel manufacturers and pipeline manufacturers of Sinopec system.

Wind power flange products account for 25% of the national wind power market share.

The company has always adhered to the business philosophy of “integrity as the cornerstone, customer as the axis, and quality to win the market”, and has successively obtained ISO9001 quality certification, ISO14001 environmental certification, OHSAS18001 occupational health and safety certification, CE certification, PED/AD certification, PCCC product certification, special equipment manufacturing license, FRANCE BV factory certification, physical and chemical laboratory CNAS certification, and CMA measurement certification with the enterprise spirit of “learning, surpassing, and leading”.

At the beginning of 2011, the company passed Gamesa’s audit and certification, and became a qualified supplier of tower flange, laying a solid foundation for products to go abroad.

The 26 brake discs and door frame flanges independently developed and produced by the company have obtained national patents.

Looking at the world and looking forward to the future, the company is willing to work with customers at home and abroad to achieve win-win results, common development and create a better future.


Country: China

About the company:

IRAETA Energy Equipment Co., Ltd. is a manufacturing enterprise focusing on “forging” and conducting diversified product management.

Its main products include rings, discs, cylinders and special-shaped forgings, wear-resistant steel balls, steel sections and grinding rods, which are mainly used in wind power, nuclear power, ultra-high voltage, petrochemical, marine engineering, machinery manufacturing, mining and other fields.

IRAETA has an important market position in clean energy, fossil energy, heavy equipment, mining and other fields, including:

In the field of wind power, it is the single champion demonstration enterprise of wind power flange of the Ministry of Industry and Information Technology, and has manufacturing performance of several 8-14MW models;

In the field of nuclear power, the manufacturing record of super large forged rings with a diameter of 15.8m is maintained worldwide;

In the field of pipe flange, it has more than 20 years of export experience and has obtained the certification of the Eight Nation Classification Society;

In the field of mining grinding, it is a stable supplier of grinding media for many of the world’s top 500 mining enterprises;

In the formulation of industry and group standards, he participated in the drafting and formulation of eight standards, including wind power ring forgings, rolled steel balls, ultra-high pressure tower flanges, and rolled large cylinders.

IRAETA has 1 sales company, 7 manufacturing divisions, 7 management centers, 1 Shanghai branch, 1 Jining factory, 1 Spanish factory, and more than 1800 employees worldwide.

For nearly half a century, IRAETA has always been rooted in the forging industry, and has concentrated on its products from offshore fans along the Atlantic coast to oil fields deep in the Middle East desert to mines in the mountains of Peru.

Adhering to the values of “honesty, modesty, tenacity and hard work”, IRAETA is always committed to creating sustainable value for global customers through high-quality products.

6. Jinrui

Country: China

Founded: 1997

About the company:

Jinrui Group was founded in 1997. As a high-tech enterprise integrating technology R&D and production and operation, it is an award-winning unit of the Technology Innovation Fund of the Ministry of Science and Technology.

The National Development and Reform Commission “New Energy Special Demonstration Project Unit”, the director unit of China Moving and Pressing Association, presided over the formulation of four national standards for the forging industry.

The company is located in Dingxiang County, Shanxi Province, China’s “hometown of forging”.

It covers an area of 150000 m2 (218 mu), with a building area of 58000 m2, more than 100 sets of main equipment and an annual production capacity of 80000 tons.

Mr. Lan Pengguang, Chairman of the Board, is a member of the National Forging Standardization Technical Committee, a member of the Plastic Engineering Branch of the Chinese Mechanical Engineering Society, and a member of the Special Rolling Academic Committee.

The main products of the company are excavator support, pressure vessel flange, wind power flange and slewing ring, gear ring forgings and other annular moving parts, which are used in engineering machinery, port machinery, wind power equipment, petrochemical industry, pressure vessels, aerospace and other fields.

At the beginning of its establishment in 1997, the company organized production and management in strict accordance with SO9000 standards, established an effective, stable and reliable quality management and guarantee system, obtained the certificate through German TV certification audit in 2001, obtained the ThyssenKrupp certificate in 2005, and successively passed 1S014001 environmental management system and OHSA18001ISO45001 occupational health and safety management system certification, EU CE/CPR/EN1090 certification, and national safety standardization certification. 

The company’s physical and chemical testing center has obtained CNAS/1S017025 and CMA measurement qualification certification.

7. Huaertai machinery

Country: China

Founded: 2003

About the company:

Founded in 2003, Wuxi Huatai Machinery Manufacturing Co., Ltd. has complete facilities and advanced management.

It is one of the professional manufacturers of forgings and pressure vessels in China.

The company is located in Hudai Industrial Park, Binhu District, Wuxi City, on the shore of Taihu Lake, adjacent to Provincial Highway S342 and National Highway G312, close to Shanghai Nanjing Expressway and Wuxi Yichang Expressway, with superior geographical location and convenient transportation and logistics.

The company covers a total area of 29990 square meters, including a building area of 23080 square meters.

It has more than 300 employees, including 6 senior engineers, 32 engineering technicians, and has fixed assets of 60 million yuan.

The annual output of forgings for flanges and various pressure vessels is more than 20000 tons, and more than 5000 sets of filters, pressure vessels and other pipe accessories.

The company is a member company of spare parts resource market of Sinopec, PetroChina, CNOOC and Shenhua Coal Industry Group.

In 2009, the company obtained the BSEN1SO9001:2008 quality management system certificate, BV-PED material certificate and BV product certificate issued by Bureau Veritas.

In 2010, the company passed the re evaluation certification of special equipment manufacturing license (pressure management element), and in 2011, the company passed the re evaluation certification of special equipment license (pressure vessel).

In 2012, it was awarded as a Class III enterprise (machinery) for safety production standardization. In 2013, it obtained the PED/EC certification of German TU 8V, the nuclear safety equipment manufacturing license (flange) issued by the National Nuclear Safety Administration, and the high-tech enterprise certificate of Jiangsu Province.

8. MGeldbach

Country: China

Founded: 2011

About the company:

MGeldbach (Shanxi) Flange Pipe Fittings Co., Ltd., a Sino German joint venture, is located in Dingxiang County, Shanxi Province, the hometown of forging in China.

It is only 120 kilometers away from Taiyuan City, including 15000 square meters of land and 6000 square meters of factory buildings.

The company’s production line can complete a complete set of production and processing, such as raw material cutting, die, forging ring rolling, heat treatment, lathe processing, testing, inspection, typing and surface treatment.

The company has a very professional and experienced team that skillfully operates about 40 machines to ensure good product quality.

The company has been engaged in the business of flange pipe fittings for more than 10 years, and 95% of its products are exported to Europe, especially Britain, Germany, Belgium, France, Italy, etc., as well as Canada and the Middle East.

The company can handle 3640 containers (with a net weight of about 1000 tons) of flanges and some welded and forged pipe fittings in one month.

The quality of the company’s products is recognized in the world, and all carbon steel and stainless steel products have passed the ISO-9000-TUV quality system certification and Pressure Equipment Directive 97/23/EC (PED) Annex1, paragraph 4.3&ad2000-w0 certification.

In addition, the company is a subsidiary of GELDBACH GROUP, It has a history of almost 104 years.

The company’s products cover ANS, BS, D1N, EN, JIS, SAS and other standards, and the company can process according to customer requirements and special drawings provided.

9. Huaxi flanges

Country: China

Founded: 1984

About the company:

Jiangyin Huaxi Flange and Pipe Fittings Co., Ltd. (Wuxi Hua’an Flange Co., Ltd.) is a subordinate enterprise of Jiangsu Huaxi Group, specializing in the production of flanges, stainless steel flanges, carbon steel flanges and pipe fittings.

Founded in 1984, specializing in the production of export flanges.

In 1990, a joint venture was established with SINGAPORE TOWA HARDWARE PIE LTD to establish Wuxi Hua’an Flange Co., Ltd.

In 2005, the company implemented the extension project of technical transformation, newly launched 3600 tons of oil press, 5 meters of ring mill, 8 tons and 5 tons of electro-hydraulic hammer, 2~5 meters of vertical lathe, 5 meters of CNC drilling machine, heat treatment furnace and other annular forging production equipment, and realized strategic adjustment of the core products of the enterprise.

At present, the company covers an area of 150000 square meters, plant area of 80000 square meters, and has more than 1000 employees, including 115 senior and intermediate technicians.

The annual output of ring forgings is 35000 tons, and that of finished flanges and pipe fittings is 25000 tons.

It is made of stainless steel, carbon steel, alloy steel, dual phase steel and other materials, with more than 10000 specifications and varieties.

It is exported to 28 countries and regions, including Japan, the United States, France, Germany and Italy.

The company has the right to import and export on its own. It can directly accept orders from foreign customers.

It can produce standard flanges and pipe fittings according to JIS, ANS, EN, DIN, BS, GB and other domestic and foreign standards.

It can also produce ring forgings, non-standard flanges and pipe fittings according to customers’ drawings or samples.

The company has a perfect quality assurance system and a complete set of modern physical and chemical testing equipment.

In recent years, it has successively passed the S09001 quality system certification, the TUV Rhine ISO9001&PED system certification in Germany, the factory accreditation certificate of China Classification Society, the manufacturing license of special equipment (pressure pipeline), the first class export enterprise assessment of the General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, the JIS certification, the BV factory accreditation certificate, the membership certificate of China Forging Association, the safety registration certificate of steel forgings for pressure vessels and the membership certificate of the Wind Turbine Caution Branch.


Country: China

Founded: 2001

About the company:

Shanxi Haokun Flange Co., Ltd. was established in April 2001 with a registered capital of 100 million yuan, an area of 83000 square meters, and a building area of 35300 square meters.

There are 238 employees, including 46 technicians and 23 professional managers, with total assets of 163.15 million yuan.

The company has integrated operations from blanking, forging, heat treatment, machining, surface treatment, packaging, etc.

The main products are carbon steel, stainless steel, alloy steel, aluminum alloy, nickel base alloy flanges and forgings.

The company has a flange and forging production line with an annual output of 20000 tons and a ring production line with an annual output of 10000 tons.

Its main production equipment includes more than 30 sets of CNC sawing machines, air hammers, mechanical forging hammers, electric screw presses, D52 CNC ring grinders, vertical ring grinders, trolley type heat treatment furnaces, well chamber heat treatment furnaces, CNC lathes, automatic robot machining production lines, large vertical lathes, CNC high-speed drilling machines and other supporting equipment for turning, milling and planing.

It has perfect forging, heat treatment and machining capabilities, and can also tailor non-standard and special purpose flanges and forgings according to customer needs.

The company has independent national laboratories and various testing and inspection equipment, which can carry out various tests and identifications of the company and external enterprises.

Since its establishment, Haokun Company has focused on talent exploration, training and selection.

It has established an experienced staff team that is familiar with international norms and standards.

It has 46 technicians and 147 professional and technical workers.

The company adheres to the business tenet of survival by quality and development by efficiency.

A product quality management system (QMS) with a young and knowledgeable management team as the core has been established, which enables the product quality management system to have a complete assessment standard for each department of production and management.

A performance assessment mechanism matching the characteristics of the enterprise has been established, which enhances the enthusiasm of employees and team cohesion, and forms a rigorous quantitative assessment goal and multi-level team building.

Guided by the principle of “improving management level, developing new varieties and processes, and win-win cooperation”, the enterprise actively introduces advanced management experience and production technology to expand the market and serve customers with excellent product quality and quality services.

The company’s products are widely used in oil, petrochemical, natural gas, electricity, ships, equipment manufacturing, metallurgy, construction and other fields, and are exported to European countries, the United States, Japan, the Middle East, Southeast Asia and other countries and regions.

With its strategic positioning, the enterprise continuously innovates and surpasses itself, creating a good brand effect.

At present, with the joint efforts of the Board of Directors and all employees, the Company has always adhered to the principle of “customer first, quality first”, led Wu Kun Company to forge ahead and improve its own construction, with the goal of “running a modern enterprise, creating famous and high-quality products” and “taking the market by quality, winning users by integrity, and creating benefits by management”.

To bravely face today’s increasingly fierce market competition, continue to strengthen enterprise construction, carefully build the enterprise brand, take the enterprise development road of “scientific and technological innovation, cooperation and win-win”, and provide customers at home and abroad with high-quality, high-quality and professional products and services.

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