Updated Oct 4, 2026 · Public platform & industry data

Oct 4, 2026 Updated

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2026 Top 10 Large And Small Head Variable Diameter Reducer Manufacturers in China

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Top-rated Large And Small Head Variable Diameter Reducer suppliers, How to choose a Large And Small Head Variable Diameter Reducer manufacturer, Best Large And Small Head Variable Diameter Reducer companies in China

The top 10 Large And Small Head Variable Diameter Reducer manufacturers in China for 2026 are: Cangzhou Oulong Pipeline Equipment Manufacturing Co., Ltd, Hebei Fangqing Pipeline Manufacturing Co., Ltd, Shanghai Zoguan Electric Co., Ltd, Shanghai Xinfu Precision Machinery Co., Ltd, Mengcun Hui Autonomous County Jiayuecheng Pipe Fitting Co., Ltd, Yixing Sumeng Environmental Protection Packing Co., Ltd, Changzhou Gosman Pipeline Technology Co., Ltd, Chengdu Rongshun Materials Co., Ltd, Jiangsu Dongken New Materials Co., Ltd, Jiangsu Jinxi Magnetic Industry Co., Ltd. Ranked based on product relevance, certifications, company activity, and industry performance. This list is widely used for supplier comparison and sourcing decisions.

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Top 1
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Cangzhou Oulong Pipeline Equipment Manufacturing Co., Ltd

Across from Xinxing Furniture, 283 Provincial Road, Cangyan Road, Yanshan County

Overall Score4.9 / 5
Est. Date2020-12-22
Registered Capital28000K CNY

Cangzhou Oulong Pipeline Equipment Manufacturing Co., Ltd. is located opposite Xinxing Furniture on Cangyan Road 283 Provincial Road in Yanshan County. It was established on December 22, 2020, with the registration authority of Yanshan County Market Supervision Administration and the legal representative being Bi Qiuxia. Core products: Large And Small Head Variable Diameter Reducer, Manhole, Reducing Flange

Top 2
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Hebei Fangqing Pipeline Manufacturing Co., Ltd
Overall Score4.7 / 5
Est. Date2013-09-03
Registered Capital10900K CNY

Hebei Fangqing Pipeline Manufacturing Co., Ltd., with its registered address in Puwa Development Zone, Yanshan County, is registered with the Market Supervision and Administration Bureau of Yanshan County, and its legal representative is Zhang Fang. Its business scope includes manufacturing elbows, tees, flanges, reducers, spring supports and hangers, pipe clamps, manholes, anti-corrosion, wear-resistant, insulation pipelines, fittings, filters, metal hoses, insulation joints, insulation flanges, air doors, power plant accessories, rubber soft joints, compensators, and waterproof sleeves. Sales of valves, plumbing fittings, groove fittings, hardware, PE fittings, gaskets, insulation materials, bolts, cable trays, heads, and pipe caps. To engage in the export business of self-produced products and technologies of the enterprise, as well as the import business of machinery, equipment, components, raw materials, and technologies required by the enterprise, except for goods and technologies restricted or prohibited from import and export by the state. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Large And Small Head Variable Diameter Reducer, Head, Blind Flange

Top 3
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Shanghai Zoguan Electric Co., Ltd
Overall Score4.7 / 5
Est. Date2014-12-04
Registered Capital5000K CNY

Shanghai Zoguan Electric Co., Ltd., with its registered address at Room 314, Building 15, No. 1530 Dongfeng Village, Zhuangxing Town, Fengxian District, Shanghai, registered with the Market Supervision Administration of Fengxian District and represented by Zhang Wei as its legal representative. Its business scope includes general projects such as electronic product sales; Mold sales; Sales of power facilities and equipment; Sales of plastic products; Sales of rubber products; Sales of electrical equipment; Sales of electrical accessories; Sales of mechanical parts and components; Operation of wires and cables; Fiber optic cable sales; Sales of power electronic components; Wholesale of hardware products; Retail of hardware products; Instrument and meter repair; Sales of electrical instruments and meters; Sales of mechanical equipment; Mechanical equipment leasing; Sales of mechanical and electrical equipment; Sales of communication equipment; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Information consulting services (excluding licensed information consulting services); Sales of metal products. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license) Licensed project: Electrical installation services. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or licenses issued by the relevant departments.). Core products: Large And Small Head Variable Diameter Reducer, , Cable Accessories

TOP4
Shanghai Xinfu Precision Machinery Co., Ltd
Overall Score4.6 / 5
Est. Date2014-11-07
Registered Capital500K CNY

Shanghai Xinfu Precision Machinery Co., Ltd., with its registered address at Room 3086, Building 4, No. 6758 Daye Road, Fengxian District, Shanghai, is registered with the Market Supervision Bureau of Fengxian District. The legal representative is Peng Hanjun, and its business scope includes the manufacturing, processing (up to branch offices), installation, maintenance, wholesale, and retail of mechanical equipment and accessories (excluding special equipment), as well as the processing, wholesale, and retail of molds, metal products, and plastic products (limited to branch offices). The company is engaged in technology development, technical consulting, technical services, and technology transfer in the fields of mechanical technology and electromechanical technology, hardware and electrical equipment, electronic products, chemical raw materials and products (excluding hazardous chemicals, monitored chemicals, fireworks and firecrackers, civilian explosives, and precursor chemicals) wholesale and retail. Projects that require approval by law must be approved by relevant departments before conducting business activities. Core products: Large And Small Head Variable Diameter Reducer, Suction Machine Feeding Equipment, Stainless Steel Processing Customization

TOP5
Mengcun Hui Autonomous County Jiayuecheng Pipe Fitting Co., Ltd
Overall Score4.6 / 5
Est. Date2009-12-11
Registered Capital5800K CNY

Mengcun Hui Autonomous County Jiayuecheng Pipe Fitting Co., Ltd., with its registered address located in Liutan Industrial Zone, Xinda Highway, Mengcun Hui Autonomous County. The registration authority is the Market Supervision Administration of Mengcun Hui Autonomous County, and the legal representative is Li Tingxiang. Its business scope includes the processing and sales of elbows, tees, reducers, flanges, and pipes; Manufacturing and sales of hydraulic mechanical equipment. (Projects that require approval by law can only be operated after approval by relevant departments.). Core products: Large And Small Head Variable Diameter Reducer, Pipe Fitting, Flange

TOP6
Yixing Sumeng Environmental Protection Packing Co., Ltd
Overall Score4.5 / 5
Est. Date2016-04-22
Registered Capital2000K CNY

Yixing Sumeng Environmental Protection Filling Co., Ltd., with its registered address at No. 20 Nanxin East Road, Xiyuzhong Village, Heqiao Town, Yixing City, is registered with the Yixing Administrative Approval Bureau and represented by Tang Junhong. Its business scope includes the sales of environmental protection filling materials, environmental protection accessories, and fiberglass products; Processing and sales of plastic products. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Large And Small Head Variable Diameter Reducer, Ball Ring Packing, Plate Aerator

TOP7
Changzhou Gosman Pipeline Technology Co., Ltd
Overall Score4.5 / 5
Est. Date2018-12-10
Registered Capital10000K CNY

Changzhou Gosman Pipeline Technology Co., Ltd., with its registered address at 671 Hanjiang Road, Xinbei District, Changzhou City, Jiangsu Province, is registered with the Government Service Management Office of Changzhou High tech Industrial Development Zone (Xinbei District). The legal representative is Zou Taofeng, and its business scope includes the production, research and development, and sales of pipeline equipment and accessories, as well as plastic products; Sales of hardware products, boards, valves, molds, electronic components, and chemical raw materials (excluding hazardous materials); Import and export of goods or technology (excluding goods and technology prohibited by the state or subject to administrative approval). (For projects that require approval by law, business activities can only be carried out after approval by relevant departments) Licensed projects: import and export of goods; Technology import and export; Import and export agency (for projects that require approval by law, business activities can only be carried out after approval by relevant departments, and specific business projects are subject to the approval results). Core products: Large And Small Head Variable Diameter Reducer, Flange Butterfly Valve, Pvdf

TOP8
Chengdu Rongshun Materials Co., Ltd
Overall Score4.5 / 5
Est. Date2003-04-16
Registered Capital500K CNY

Chengdu Rongshun Materials Co., Ltd., with its registered address at No. 15, 1st Floor, Building 6, Jinfeng Road, Jinniu District, Chengdu, is registered with the Market and Quality Supervision Administration of Jinniu District. The legal representative is Yan Haiou, and its business scope includes the sale of metal materials (excluding rare and precious metals), building materials, hardware and electrical equipment, ordinary machinery, electrical machinery, chemical products (excluding dangerous goods), plastic products, valves and fittings, and daily necessities.. Core products: Large And Small Head Variable Diameter Reducer, Stainless Steel Valve, Stainless Steel Socket Welding Tee

TOP9
Jiangsu Dongken New Materials Co., Ltd
Overall Score4.4 / 5
Est. Date2014-07-24
Registered Capital10010K CNY

Jiangsu Dongken New Materials Co., Ltd., with its registered address at No. 59 Yushi Street, Xuanwu District, Nanjing City, is registered with the Market Supervision and Administration Bureau of Xuanwu District, Nanjing City. The legal representative is Yang Kang, and the business scope includes licensed projects: electrical installation services (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to approval results). General projects: new material technology promotion services; Manufacturing of electrical instruments and meters; Instrument and meter repair; Manufacturing of instruments and meters; Sealing component manufacturing; Manufacturing of electrical accessories; Mechanical parts and component processing; Manufacturing of general components; Manufacturing of automotive parts and accessories; Manufacturing of architectural decoration, plumbing components, and other metal products for building use; Manufacturing of motorcycle spare parts; Operation of wires and cables; Fastener manufacturing; Manufacturing of synthetic materials (excluding hazardous chemicals); Manufacturing of plastic products; Manufacturing of mechanical and electrical equipment; Manufacturing of power facilities and equipment; Manufacturing of distribution switch control equipment; Manufacturing of fiberglass and related products; Manufacturing of photovoltaic equipment and components; Residential water and electricity installation and maintenance services; Installation services for ordinary mechanical equipment; General equipment manufacturing (excluding special equipment manufacturing); General equipment repair; Import and export of goods; Technology import and export (except for projects that require approval according to law, conducting business activities independently based on the business license in accordance with the law). Core products: Large And Small Head Variable Diameter Reducer, Gas Pipeline Connector, Customized Flange

TOP10
Jiangsu Jinxi Magnetic Industry Co., Ltd
Overall Score4.4 / 5
Est. Date2015-06-02
Registered Capital10000K CNY

Jiangsu Jinxi Magnetic Industry Co., Ltd., with its registered address at No. 53-209 Fengshui Road, Huishan District, Wuxi City, is registered with the Administrative Approval Bureau of Huishan District, Wuxi City. The legal representative is Shi Lijuan, and its business scope includes research and development, manufacturing, processing, and sales of magnetic materials, magnetic components, magnetic products, hardware products, plastic products, electronic components, and molds; Import and export business of various commodities and technologies through self operation and agency (excluding commodities and technologies restricted or prohibited from import and export by the state). (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Large And Small Head Variable Diameter Reducer, Square Magnetic Rod, Neodymium Iron Boron

Detailed Manufacturer Comparison

ManufacturerEst. DateMain ProductsRegistered CapitalCustomization
Cangzhou Oulong Pipeline Equipment Manufacturing Co., Ltd2020-12-22Large And Small Head Variable Diameter Reducer, Manhole, Reducing Flange28000K CNYSupported
Hebei Fangqing Pipeline Manufacturing Co., Ltd2013-09-03Large And Small Head Variable Diameter Reducer, Head, Blind Flange10900K CNYSupported
Shanghai Zoguan Electric Co., Ltd2014-12-04Large And Small Head Variable Diameter Reducer, , Cable Accessories5000K CNYNot Supported
Shanghai Xinfu Precision Machinery Co., Ltd2014-11-07Large And Small Head Variable Diameter Reducer, Suction Machine Feeding Equipment, Stainless Steel Processing Customization500K CNYNot Supported
Mengcun Hui Autonomous County Jiayuecheng Pipe Fitting Co., Ltd2009-12-11Large And Small Head Variable Diameter Reducer, Pipe Fitting, Flange5800K CNYSupported
Yixing Sumeng Environmental Protection Packing Co., Ltd2016-04-22Large And Small Head Variable Diameter Reducer, Ball Ring Packing, Plate Aerator2000K CNYNot Supported
Changzhou Gosman Pipeline Technology Co., Ltd2018-12-10Large And Small Head Variable Diameter Reducer, Flange Butterfly Valve, Pvdf10000K CNYSupported
Chengdu Rongshun Materials Co., Ltd2003-04-16Large And Small Head Variable Diameter Reducer, Stainless Steel Valve, Stainless Steel Socket Welding Tee500K CNYNot Supported
Jiangsu Dongken New Materials Co., Ltd2014-07-24Large And Small Head Variable Diameter Reducer, Gas Pipeline Connector, Customized Flange10010K CNYNot Supported
Jiangsu Jinxi Magnetic Industry Co., Ltd2015-06-02Large And Small Head Variable Diameter Reducer, Square Magnetic Rod, Neodymium Iron Boron10000K CNYSupported

Purchasing Guide

Based on real user feedback, we provide the following suggestions:

  • For procurement requirements that require the use of large and small head variable diameter reducers, it is recommended to prioritize confirming the diameter dimensions, wall thickness, and material parameters at both ends to ensure compatibility with existing pipeline systems and avoid installation difficulties or leakage risks caused by specification errors.
  • In high-pressure scenarios such as chemical or water treatment, the pressure bearing capacity and corrosion resistance of large and small head variable diameter reducers need to be evaluated with emphasis. Different application environments have significant differences in the technical parameter requirements of the product.
  • When selecting suppliers, priority should be given to product compatibility, business qualifications, enterprise activity, industry performance, and companies with industry data support. Such suppliers usually provide more stable supply and professional technical support.
  • Large and small head reducing pipes are commonly used in heating pipelines to regulate flow and pressure. When purchasing, it is necessary to select materials with thermal expansion coefficients that are compatible with the system design temperature range, such as carbon steel or stainless steel.

Knowledge Base

Q

Reducing pipes (big and small heads) are used for pipe diameter transition in chemical, water treatment, oil and gas, and HVAC pipeline systems, when connecting two different diameter pipes. Commonly found at pump inlet and outlet, equipment interface variable diameter positions, with corrosive working media and fluctuating pipeline pressure, requiring concentricity and wall thickness uniformity of pipe fittings to prevent local wear caused by fluid turbulence. Concentric and eccentric reduction

Q

Baidu AiGou has found relevant pictures of different categories of variable diameter reducers, taking you on a journey to appreciate the diversity and uniqueness of variable diameter reducers. At the same time, we also recommend high-quality variable diameter reducers for you, so that you can easily and quickly find the most suitable variable diameter reducers for yourself when purchasing.

Ranking Evaluation Method

This ranking is generated based on public data from Baidu B2B platform and common industry assessment dimensions, focusing on enterprise activity, business qualifications, product matching and industry performance to provide valuable manufacturer ranking information for buyers.

DimensionDescription
Data SourceMulti-dimensional data including platform public data, enterprise certification, user reviews, and transaction records
AssessmentComprehensive indicators including enterprise activity, qualifications, product quality, service capability, and user reputation
Update FrequencyRanking data is updated daily to ensure timeliness and accuracy
SuggestionRankings are for reference only. We recommend comprehensive evaluation based on actual needs