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Top 10 Flange Brand & Manufacturers

This section provides a list of the top 10 Flange manufacturers, Website links, company profile, locations is provided for each company. Also provides a detailed product description of the Flange, including product introduction, history, purpose, principle, characteristics, types, usage and purchase precautions, etc.

Manufacturers （Ranking in no particular order）

: Wuxi Flange Forging Co., Ltd.

Address: No. 288, Zhenhu Road, Hudai Town, Binhu District, Wuxi City, Jiangsu Province

Company website: https://wxsfalan.com

Company Overview

Wuxi Flange Forging Co., Ltd. was founded in 1984. It is a subsidiary of Jiangsu Shentong Valve Co., Ltd. (stock code 002438). It is mainly engaged in the manufacture, processing and research and development of flanges and petrochemical equipment accessories. It is one of the earliest and large-scale flange production and pressure vessel forging manufacturers in China. The company covers an area of 78,000 square meters, of which the building area is 39,000 square meters. There are nearly 400 employees, including more than 170 engineering and technical personnel with college degree or above, and fixed assets of nearly 100 million yuan. The company mainly produces forged steel flanges of various materials and various steel forgings for boilers and pressure vessels, as well as machinery and ship forgings according to various international and domestic standards. The products are widely used in petrochemical, power (nuclear power, wind power, thermal power), light industry, machinery, metallurgy and shipbuilding. The "Ceylon" brand enjoys a high reputation in China. The company has a complete organizational structure, including the manager's office, finance department, human resources department, sales department, purchasing department, manufacturing department, technical department, quality assurance department, quality inspection department, equipment department, security department, forging workshop, heat treatment workshop, blanking workshop, metalworking workshop, steel warehouse, finished product warehouse and more than ten other departments and workshops. The company has excellent production equipment and currently has five forging equipment, including a 3,600-ton forging press, a φ6300mm CNC ring rolling machine, a 1.5-ton air hammer, two one-ton air hammers, seven natural gas heating furnaces for forging, sixteen industrial resistance furnaces for heat treatment, and more than eighty metal processing equipment, the largest of which is a five-meter CNC vertical lathe. It has formed an annual production capacity of 50,000 tons of medium and high pressure flanges and various types of boiler and pressure vessel steel forgings. The maximum pressure of the flange produced can reach 2500Lb, the maximum diameter can reach about six meters, and the maximum single piece weight can reach 30 tons. 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, etc., 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 for meeting product quality. The company always follows the quality policy of providing customers with quality products and thoughtful services, adheres to the corporate purpose of "unity, pragmatism, diligence and innovation", and abides by its reputation. Over the years, it has provided a large number of flanges and steel forgings for boilers and pressure vessels for large petrochemical companies such as Sinopec, PetroChina, and CNOOC, as well as supporting boiler and pressure vessel manufacturers. In particular, the successful development of various types of high-pressure flanges has ended the situation of domestic dependence on imports of various types of high-pressure flanges, 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, Lanzhou Ethylene, Guangdong 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 and other projects, and has been well received by customers. In 1999, the company's products successfully entered the nuclear power field and became the flange and forging supplier of 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, Pakistan C2, Hongyanhe, Ningde, Yangjiang, Fangjiashan, Fuqing, Taishan, Fangchenggang, Sanmen, Haiyang and other nuclear power projects, becoming the main supplier of nuclear-grade flanges for CNNC, CGN and CNNC. After years of precipitation and accumulation, the company has unique advantages in special steel flanges such as large-diameter flanges, high-pressure flanges, low-temperature steel flanges, hydrogen-resistant steel flanges, duplex steel flanges, nuclear power flanges and nickel-based alloys, and is ahead of domestic counterparts in manufacturing technology and testing methods.

: Shanxi Guanjiaying Flange Forging Co., Ltd.

Address: Guanjiaying Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province

Company website: http://www.gjyff.com/zh

Company Overview

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 technological transformation, its annual production capacity has reached 30,000 tons. The company covers an area of more than 260,000 square meters, with more than 500 employees, including more than 50 high-level and senior professional titles, with a cumulative 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 industry standards and non-standard flanges and forgings weighing less than 35 tons, with a size range from DN15 to DN5000, and a pressure level of 3000LBS. The company is a supplier to customers such as PetroChina, Sinopec, CNOOC, Shell and Shenhua Group.

: Jiangyin Hengrun Heavy Industry Co., Ltd.

Address: European Industrial Park, Area A, Zhouzhuang Town, Jiangyin City, Wuxi City, Jiangsu Province

Company website: http://www.hrflanges.com/

Company Overview

Jiangyin Hengrun Heavy Industry Co., Ltd. (SH603985) was established in July 2003. It is a precision machinery manufacturer that can provide customers with one-stop services in design, forging and finishing. The company (including subsidiaries) currently has more than 1,300 employees and a consolidated sales of 1.9 billion yuan in 2022. Hengrun shares is committed to building an internationally renowned precision machinery manufacturer. It has carried out in-depth cooperation with world industry giants such as Siemens of Germany, GE of the United States, Emerson of the United States, Vestas of Denmark, Shanghai Electric, Yantai Wanhua, CGN, Sinopec, etc., and has successively won the honorary title of "Excellent Supplier" from many companies such as Siemens, GE, Emerson, and China National Nuclear Corporation 23 Construction. The company's products cover wind power flanges, wind power bearings, gas turbine components, nuclear power components, semiconductor equipment, pressure vessels, offshore oil and gas equipment, etc. The company has large hydraulic presses and CNC ring rolling machines, and has mastered mature forging, ring rolling and heat treatment technologies for medium and large ring forgings. It is able to produce various types of ring forgings with a diameter of less than 12 meters. It has introduced world-leading machining centers, turning and milling compound and other 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. The company passed the TUV Rheinland "ISO9001" quality system certification in October 2003; and subsequently 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; EU "CPR", "EN1090", Japan "JIS" and other qualification certificates in the wind power industry; Deep Sea Oil and Gas M650 Certificate; Recognition certificates from the world's eight major classification societies such as ABS, BV, CCS, DNV-GL, KR, LR, NK, RINA; At the same time, the company has entered the supplier system of Sinopec and PetroChina, providing a solid guarantee for the company's sustainable development. The company attaches great importance to technology research and development and product development, and has established industry-university-research cooperation with well-known universities, and jointly built research and development institutions such as "Jiangsu Engineering Technology Center" and "Jiangsu Enterprise Technology Center". It has successively won the Jiangyin Science and Technology Progress Award, Wuxi Patent Gold Award and other honorary titles. In the future, the company will, based on sufficient market research, introduce high-quality talents, actively invest in the research and development of new projects and new technologies, continuously accelerate the industrialization of scientific and technological achievements, and enhance the core competitiveness of the company.

: IRAETA Energy Equipment Co., Ltd.

Address: No. 9001, Jiwang Road, Guanzhuang Subdistrict Office, Zhangqiu District, Jinan City, Shandong Province

Company website: http://www.iraeta.cn/

Company Overview

Elaite Energy Equipment Co., Ltd. is an enterprise mainly engaged in the manufacture of key components for clean energy. Its products are mainly used in wind power, nuclear power, hydropower, UHV, marine engineering, heavy equipment, high-end refining, mining and metallurgy. Elaite was formally registered and established in 2006. After more than 10 years of development and growth, Elaite has become an important manufacturer of discs, rings, cylinders, special-shaped forgings and wear-resistant steel balls in China and the world. Elaite occupies an important market position in the fields of clean energy, fossil energy, heavy equipment and mining, including: In the field of wind power, Elaite has a number of 10-20MW models of manufacturing performance; In the field of nuclear power, Elaite has a global record of manufacturing ultra-large forged rings with a hot diameter of 15.673 meters; In the field of pipeline flanges, Elaite has more than 20 years of export experience and has obtained certification from eight classification societies; In the field of mining grinding, Elaite is a stable supplier of grinding media for many Fortune 500 mining companies. At present, IRAETA has more than 20 certifications in different countries and regions around the world. It is a certified supplier for more than 30 Fortune 500 companies. It has participated in the drafting and formulation of 19 standards for wind turbine ring forgings, forged (rolled) steel balls, UHV pipe tower flanges and forged and rolled large cylinders, and has obtained more than 120 invention patents and utility patents. IRAETA currently has 1 sales center, 1 advanced materials industry research institute, 7 manufacturing divisions, 7 management centers, 1 Shanghai company, 1 Spanish company, 1 Jining company, 1 logistics company, and more than 2,200 employees worldwide. For nearly half a century, IRAETA has always been rooted in the equipment manufacturing industry. From offshore wind turbines on the Atlantic coast, to the fourth-generation nuclear power on the coast of the East China Sea in China, to the mines in the mountains of Peru, IRAETA products can be seen. Adhering to the values of "honesty, humility, tenacity, and hard work", IRAETA has always been committed to creating sustainable value for global customers through high-quality products.

: Shanxi Tianbao Group Co., Ltd.

Address: Beiguan Industrial Zone, Dingxiang County, Xinzhou City, Shanxi Province

Company website: http://www.sxtbfd.com/

Company Overview

Shanxi Tianbao Group Co., Ltd. is famous for its forging products. Its headquarters is located in Beiguan Industrial Zone, Dingxiang County, the hometown of forging in China. It mainly produces various forging products such as wind power, pressure vessel pipelines, bearings, gear rings, and mechanical accessories with various advanced forging processes such as free forging, die forging, and ring forging. In September 2014, the newly invested subsidiary Shanxi Tianbao Group New Energy Development Co., Ltd. was officially put into production, and the wind power towers produced have been installed and used in wind farms. The company currently has total assets of 450 million yuan, covers an area of 135,000 square meters, a building area of 65,000 square meters, 500 employees, 83 technical talents in oil pressure, ring rolling, physical and chemical, flaw detection, forging, machining, tower manufacturing, etc., full-speed tapered roller ring rolling machines with diameters of 7000mm and 5000mm, and 3600-ton oil presses, more than 140 CNC lathes, CNC drilling machines, tower manufacturing equipment, and a physical and chemical laboratory. The company can produce 50,000 tons of wind turbine tower flanges and door frame flanges, 10,000 tons of pressure vessel flanges, pipeline flanges and forgings, and 300 sets of wind turbine towers per year. The company's products have entered the procurement list of 38 large domestic and foreign enterprise groups, and have established strategic cooperative relations with 5 major national power companies, 6 major wind turbine manufacturers, more than 30 large domestic and foreign related enterprises, and pressure vessel manufacturing enterprises and pipeline production enterprises of Sinopec system. Wind turbine flange products account for 25% of the national wind power market share. The company always adheres to the business philosophy of "taking integrity as the cornerstone, taking customers as the axis, and winning the market with quality", and the corporate spirit of "learning, surpassing, and leading". It 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 through CNAS certification, CMA metrology certification. At the beginning of 2011, the company passed the Gamesa audit and certification and became its qualified supplier of tower flanges, laying a solid foundation for the products to go abroad. Its independently developed and produced brake discs and door frame flanges have obtained 26 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.

: Shanxi Jinrui High Pressure Ring Co., Ltd.

Address: No. 10, Dingdong Road, Jinchang Town, Dingxiang County, Xinzhou City, Shanxi Province

Company website: http://www.sxjrjj.cn

Company Overview

Jinrui Group was founded in 1997. It is a high-tech enterprise integrating technology research and development and production operations. It is an award-winning unit of the Ministry of Science and Technology's Technology Innovation Fund. It is a "New Energy Special Demonstration Project Unit" of the National Development and Reform Commission, a governing unit of the China Forging Association, and presided over the formulation of four national standards for the forging industry. The company is located in Dingxiang County, Shanxi Province, China's "Forging Hometown". It covers an area of 150,000 m2 (218 acres), a building area of 58,000 m2, more than 100 sets of main equipment, and an annual production capacity of 80,000 tons. Chairman Lan Pengguang is a member of the National Forging Standardization Technical Committee, a director of the Plastic Engineering Branch of the Chinese Society of Mechanical Engineers, and a member of the Special Rolling Academic Committee. The company's main products are various annular forgings such as excavator support seats, pressure vessel flanges, wind power flanges and slewing bearings, gear ring forgings, etc., which are used in engineering machinery, port machinery, wind power equipment, petrochemicals, pressure vessels, aerospace and other fields. Since its establishment in 1997, the company has strictly organized production and management in accordance with ISO9000 standards, established an effective, stable and reliable quality management and assurance system, passed the German TüV certification audit and obtained the certificate in 2001, obtained the ThyssenKrupp certificate in 2005, and successively passed the ISO14001 environmental management system and OHSA18001/ISO45001 occupational health and safety management system certification, EU CE/CPR/EN1090 certification, national safety standardization certification, and the company's physical and chemical testing center obtained CNAS/ISO 17025 and CMA metrology qualification certification.

: Goldbeck (Shanxi) Flange Pipe Fittings Co., Ltd.

Address: Fanglan Industrial Zone, Dingxiang County, Xinzhou City, Shanxi Province

Company website: http://www.geldbachshanxi.com/

Company Overview

Goldbeck (Shanxi) Flange and Pipe Fittings Co., Ltd. is a Sino-German joint venture located in Dingxiang County, Shanxi Province, the hometown of forging in China, 120 kilometers away from Taiyuan City. The company covers an area of 35,000 square meters, of which 25,000 square meters are factory buildings. Our production line can complete a complete set of production and processing, such as cutting, forging, reaming, heat treatment, machining, drilling, testing, inspection, typing, surface treatment, etc. of raw materials. We have a very professional and experienced team that is proficient in operating more than 120 machines to ensure good product quality. The company has been engaged in the business of flanges and pipe fittings for more than 19 years, and its products are mainly exported to Europe, especially the United Kingdom, Germany, Belgium, France, Italy, etc., as well as Canada and the Middle East. The company produces 50-60 containers (net weight of about 1,200 tons) of flanges per month, as well as some welding and forging pipe fittings. The quality of our products is recognized worldwide, and all carbon steel and stainless steel products have passed ISO-9000-TUV quality management system certification and Pressure Equipment Directive 97/23/EC (PED) Annex1, Paragraph 4.3 & AD2000-W0 certification, and have also obtained ISO14001 certification, 18001 certification, and pressure vessel certification. Our company is a subsidiary of GELDBACH GROUP, which is very famous in the international market in the field of flanges and pipe fittings, and has a history of 110 years. Our products cover ANSI, BS, DIN, EN, DIS, SAS and other standards, and can be processed according to customer requirements and special drawings provided.

: Wuxi Huaertai Machinery Manufacturing Co., Ltd.

Address: No. 16, Zhangshe Road, Hudai Industrial Park, Wuxi City, Jiangsu Province

Company website: http://www.wxhet.com.cn

Company Overview

Wuxi Huaertai Machinery Manufacturing Co., Ltd. was founded in 2003. It has complete facilities and advanced management. It is one of the professional manufacturers of forgings and pressure vessels in China. It is a member company of the spare parts resource market of Sinopec, PetroChina, CNOOC, and Shenhua Coal Group. The company produces more than 20,000 tons of flanges and various pressure vessel forgings, and more than 5,000 filters, pressure vessels and other pipeline accessories annually. The company can produce flanges for oil filters and various steel forgings for pressure vessels of various materials (carbon steel, alloy steel, low-temperature steel, stainless steel, duplex steel, nickel-based alloy, etc.) according to various international and domestic standards (ASME, ASNI, DIN, GB, JB/T, SH, HG, etc.). The company's filters, pressure vessels and other petrochemical pipeline accessories have passed the verification of major projects at home and abroad. They are favored by many customers for their "high safety and high quality". The products are widely used in petrochemical, electric power, machinery, metallurgy and shipbuilding. Through years of hard work, the "Huaertai" brand is well-known in China. The company is well-equipped with one 2000-ton forging press, one fully automatic CNC horizontal ring rolling machine (processing diameter up to φ4500mm), one φ1300mm fully automatic CNC vertical ring rolling machine, one 8-ton electro-hydraulic hammer, one 1.5-ton electro-hydraulic hammer, one 1-ton air hammer, five heating furnaces for forging, the outer diameter of heat treatment can reach φ4300mm, two high-temperature heating furnaces, more than 50 metal processing equipment, including a CNC vertical lathe with a processing diameter of 5 meters, a 3.5-meter CNC vertical lathe, a 2.5-meter CNC vertical lathe, and two CNC drilling machines with drill bits of φ80mm. The company takes "providing customers with high-quality products and thoughtful services" as its fundamental goal and "serving customers wholeheartedly" as its corporate development concept. It abides by its reputation and provides dedicated services for ten years. Over the years, it has provided a large number of flange forgings, pressure vessels, filters and other products to dozens of large domestic petrochemical leading enterprises such as Yanshan Petrochemical, Guangzhou Petrochemical, Maoming Petrochemical, Zhenhai Refining and Chemical, Tianjin Petrochemical, Huizhou Refining and Chemical, Dushanzi Ethylene, Puguang Natural Gas, Shenhua Coal Industry Group, Shenhua Ningmei Group, and power companies such as Zhejiang Thermal Power. The products are exported to Vietnam, Myanmar, Sri Lanka, Egypt, Iran, Saudi Arabia and other countries, and are well received by customers.

: Jiangyin Huaxi Flange Pipe Fittings Co., Ltd.

Address: Huaxi Village, Jiangyin City, Wuxi City, Jiangsu Province

Company website: https://www.flange.com.cn

Company Overview

Jiangyin Huaxi Flange Pipe Fittings Co., Ltd. (Wuxi Huaan Flange Co., Ltd.) is a subsidiary of Jiangsu Huaxi Group Corporation, specializing in the production of flanges, stainless steel flanges, carbon steel flanges and pipe fittings. Founded in 1984, it specializes in the production of export flanges. In 1990, it established a joint venture with Singapore Towa Hardware Pte. Ltd. (SINGAPORE TOWA HARDWARE PIE LTD) to establish Wuxi Huaan Flange Co., Ltd. In 2005, the company implemented a technical transformation and extension project, and newly installed 3,600-ton hydraulic presses, 5-meter ring rolling machines, 8-ton and 5-ton electro-hydraulic hammers, 2-5-meter vertical lathes, 5-meter CNC drilling machines, heat treatment furnaces and other ring forging production equipment, and achieved strategic adjustments in the company's core products. At present, the company covers an area of 150,000 square meters, with a plant area of 80,000 square meters, and has more than 1,000 employees, including 115 high- and middle-level technical personnel. The company produces 35,000 tons of ring forgings and 25,000 tons of finished flanges and pipe fittings annually, with various materials such as stainless steel, carbon steel, alloy steel, duplex steel, etc., and more than 10,000 specifications and varieties, which are exported to 28 countries and regions including Japan, the United States, France, Germany, and Italy. The company has the right to import and export by itself, and can directly accept orders from foreign customers. It can produce standard flanges and pipe fittings according to domestic and foreign standards such as JIS, ANSI, EN, DIN, BS, GB, etc., and can also produce ring forgings, non-standard flanges and pipe fittings according to customer drawings or samples. The company has a complete quality assurance system and a complete set of modern physical and chemical testing equipment. In recent years, it has successively passed ISO9001 quality system certification, German TUV Rheinland ISO9001 & PED system certification, China Classification Society factory approval certificate, special equipment (pressure piping) manufacturing license, the first-class export enterprise assessment of the General Administration of Quality Supervision, Inspection and Quarantine, passed JIS certification, BV factory approval certificate, China Forging Association membership certificate, pressure vessel steel forging product safety registration certificate and wind power machinery branch membership certificate.

: Shanxi Haokun Flange Co., Ltd.

Address: Niutai Jiulongwan Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province

Company website: http://www.hkflanges.cn/

Company Overview

Shanxi Haokun Flange Co., Ltd. was established in April 2001 with a registered capital of 100 million yuan, covering an area of 83,000 square meters (about 125 acres), a building area of 35,300 square meters (about 53 acres), and currently has 238 employees, including 46 technicians and 23 professional managers, with total assets of 163.15 million yuan. The company has integrated operations from cutting, forging, heat treatment, machining, surface treatment, packaging, etc., and its main products are carbon steel, stainless steel, alloy steel, aluminum alloy, nickel-based alloy flanges and forgings. The company has an annual production line of 20,000 tons of flanges and forgings and an annual production line of 10,000 tons of rings. The main production equipment includes CNC sawing machines, air hammers, mechanical forging hammers, electric screw presses, D52 CNC ring rolling machines, vertical ring rolling machines, trolley-type heat treatment furnaces, well chamber heat treatment furnaces, CNC lathes, automated robot machining production lines, large vertical lathes, CNC high-speed drilling machines and other lathe, milling, planing and more than 130 supporting equipment. It has perfect forging, heat treatment and machining capabilities and can also customize non-standard and special-purpose flanges and forgings according to customer needs. The company has an independent national laboratory and various testing and inspection equipment, which can carry out various tests and appraisals of the company and external enterprises. In 2003, the company obtained the right to import and export on its own, and obtained ISO9001 quality system certification in the same year, and has been strictly managing production in accordance with this standard. In 2006, the company obtained the EU PED certification and AD2000-W0 certification, and the pressure vessel (pipeline component) manufacturing license in the same year. In 2008, the company became a qualified supplier of Sinopec (code: 41416290) and a second-level qualified supplier of PetroChina (code: 02140019965). In 2010, it passed the US API6APSL1-PSL3 certification. In 2012, it passed the GB/T24001-2004 (idtISO14001: 2004) environmental management system and GB/T28001-2011 (OHSAS18001: 2007) occupational health and safety management system certification. In 2014, it obtained the China Classification Society certificate (CCS), passed the GJB9001B certification and obtained the certificate, and obtained the national laboratory accreditation certificate in the same year, and was awarded the title of "High-tech Enterprise". The passing of these certifications will greatly improve the company's management level and market competitiveness. Since its establishment, Haokun Company has focused on discovering, training and selecting talents, and has established a team of experienced employees who are familiar with international standards, with 46 technicians and 147 professional and technical workers. The company adheres to the business purpose of survival by quality and development by efficiency. It has established a product quality management system (QMS) with a young and knowledgeable management team as the core, so that the product quality management system has complete assessment standards for various departments of production and management, and has established a performance assessment mechanism that matches the characteristics of the enterprise, enhancing employee enthusiasm and team cohesion, and forming rigorous quantitative assessment goals and multi-level team building. With the guiding principle of "improving management level, developing new varieties and processes, and achieving win-win cooperation", the company actively introduces advanced management experience and production technology, and develops markets and serves customers with excellent product quality and high-quality services. The company's products are widely used in petroleum, petrochemical, natural gas, electricity, shipbuilding, equipment manufacturing, metallurgy, construction and other fields, and are exported to EU countries, the United States, Japan, the Middle East, Southeast Asia and other countries and regions. With its accurate strategic positioning, the company continues to innovate and surpass 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", guiding Haokun Company to forge ahead and improve its own construction, in order to achieve the goal of "running a modern enterprise, creating famous and high-quality products" and "quality occupies the market, integrity wins users, management creates benefits". To bravely face the increasingly fierce market competition today, continuously strengthen enterprise construction, carefully build corporate brands, take the path of enterprise development of "scientific and technological innovation, win-win cooperation", and provide high-quality, high-quality and professional products and services to customers at home and abroad.

Categories related to Flange

Flange Information

Information

Flange Information

What is Flange

A flange is a projecting rim or collar, usually circular, used to strengthen, connect, or provide a means of attachment. In engineering and piping systems, flanges are used to connect pipes, valves, pumps, and other equipment. They provide a method to join two pieces of equipment or piping sections together, allowing for easy disassembly and reassembly for maintenance, repair, or modification.

History of Flange

The use of flanges has evolved over time to meet the needs of industrial and engineering applications. Initially, simple flanges were used in early piping systems, and over time, different types and designs have emerged. Modern flanges incorporate various materials, pressure ratings, and sealing methods, reflecting advancements in manufacturing and the need for efficient and reliable piping and equipment connections in industries such as oil and gas, chemical, and water treatment.

Purpose of Flange

The main purpose of a flange is to provide a secure and reliable connection between piping components and equipment. Flanges allow for easy installation and removal of pipes and equipment, facilitating maintenance and repair. They also help in distributing loads, compensating for thermal expansion, and sealing the connection to prevent leaks, ensuring the integrity of the system.

Principle of Flange

Flanges operate by being bolted together, with a gasket placed between them to ensure a leak-tight seal. The bolts exert pressure on the flanges, compressing the gasket, which fills any irregularities and prevents fluid or gas from escaping. The flange design, including its thickness, bolt pattern, and material, affects its ability to withstand pressure, temperature, and other forces acting on the connection.

Features of Flange

Material: Flanges can be made of various materials, including carbon steel, stainless steel, cast iron, and alloy steel. The material is chosen based on the application, considering factors like temperature, pressure, and the fluid being transported, to ensure compatibility and durability.
Type: There are different types of flanges, such as weld neck, slip-on, blind, and socket weld flanges. Weld neck flanges provide a stronger connection for high-pressure applications, while slip-on flanges are easier to install. Blind flanges are used to seal the end of a pipe, and socket weld flanges are used for small-diameter pipes.
Size and Diameter: Flanges come in different sizes and diameters, selected based on the pipe size and system requirements. Larger flanges are used for bigger pipes and higher flow rates, while smaller flanges are for low-flow systems or smaller pipes.
Pressure Rating: Flanges have specified pressure ratings, indicating the maximum pressure they can withstand. The pressure rating is determined by the flange type, material, and design, ensuring safe operation under different pressure conditions.

Types of Flange

Weld Neck Flange: Has a long tapered hub that is welded to the pipe, providing a smooth transition and high strength. It is used in high-pressure and critical applications, such as in power plants and oil refineries.
Slip-On Flange: Slips over the pipe end and is welded around the outer diameter. It is easier to align and install, making it popular for low and medium-pressure systems and where frequent disassembly is required.
Blind Flange: Used to seal the end of a pipe, preventing flow or access. It is a solid disk with bolt holes, often used for testing, inspection, or future expansion of the system.
Socket Weld Flange: Has a socket into which the pipe is inserted and then welded, offering a compact design. It is used for small-diameter pipes and where space is limited.
Lapped Flange: Used in low-pressure systems, with lapped faces that are bolted together, often with a gasket. It is simple and cost-effective for non-critical applications.

Precautions for using Flange

Gasket Selection: Choose the appropriate gasket material and type based on the fluid, temperature, and pressure. The gasket is crucial for sealing, and using the wrong gasket can lead to leaks and system failure.
Bolting: Use the correct bolts, nuts, and washers, and tighten them evenly to the recommended torque. Uneven bolting can cause flange misalignment and leaks, and over-tightening can damage the flange or gasket.
Welding: If welding is required, follow proper welding procedures, especially for weld neck and socket weld flanges, to ensure a strong and durable connection. Improper welding can lead to weak points and leaks.
Inspection: Regularly inspect flanges for signs of leakage, corrosion, and damage. Check the integrity of the gasket and the condition of the bolts, and replace damaged parts promptly.[!--empirenews.page--]

Things to consider when purchasing Flange

System Requirements: Consider the pressure, temperature, and fluid in the system. Choose a flange type, material, and size that meets the requirements, ensuring safe and reliable operation.
Connection Type: Decide between welding, bolting, or a combination, depending on the application and maintenance needs. Weld neck flanges are for permanent connections, while slip-on flanges allow for easier disassembly.
Gasket Compatibility: Ensure the flange and gasket are compatible in terms of size, material, and sealing requirements. The gasket must withstand the operating conditions and provide a leak-tight seal.
Brand and Quality: Opt for a reputable brand known for manufacturing high-quality flanges, especially for critical applications where flange failure could lead to safety hazards or production losses.

Terms of Flange

Material: The material from which the flange is made, which affects its strength, corrosion resistance, and compatibility with the system's fluid and temperature.
Gasket: A sealing element placed between flanges to prevent leakage. It is compressed by the flange bolts, filling any gaps between the flange faces.
Bolt Holes: Holes around the flange through which bolts are inserted to connect two flanges, with the bolt pattern and size affecting the flange's strength and sealing capability.
Pressure Rating: The maximum pressure the flange can withstand, determined by its design and material, ensuring safe operation under pressure.
Hub (for weld neck flange): The tapered part of the weld neck flange that is welded to the pipe, providing a smooth transition and enhancing the connection's strength.