Updated Sep 2, 2026 · Public platform & industry data

Sep 2, 2026 Updated

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2026 Top 10 Directly Buried Insulation Pipeline Manufacturers in China

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Top-rated Directly Buried Insulation Pipeline suppliers, How to choose a Directly Buried Insulation Pipeline manufacturer, Best Directly Buried Insulation Pipeline companies in China

The top 10 Directly Buried Insulation Pipeline manufacturers in China for 2026 are: Langfang Ouliang Thermal Insulation Materials Co., Ltd, Cangzhou Huadun Anti corrosion and Insulation Engineering Co., Ltd, Cangzhou Jianghong Pipeline Equipment Co., Ltd, Shandong Shengbao Pipeline Technology Co., Ltd, Cangzhou Huadun Pipeline Technology Co., Ltd, Cangzhou Hourong Pipeline Anti corrosion and Insulation Co., Ltd, Cangzhou Tianhe Yuan Pipeline Co., Ltd, Cangzhou Guangyi Pipeline Manufacturing Co., Ltd, Cangzhou Tuocheng Pipeline Equipment Co., Ltd, Cangzhou Huiyu Pipeline Equipment 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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Langfang Ouliang Thermal Insulation Materials Co., Ltd
Overall Score4.9 / 5
Est. Date2020-12-23
Registered Capital500K CNY

Langfang Ouliang Thermal Insulation Materials Co., Ltd., with its registered address in Da Shangtun Town, Dacheng County, Langfang City, Hebei Province, is registered with the Market Supervision Administration of Dacheng County, Langfang City. The legal representative is Xu Falong, and its business scope includes the manufacturing and sales of thermal insulation and sound insulation materials, as well as the manufacturing and sales of plastic processing equipment; Sales of chemical products (excluding licensed chemical products), sales of metal materials, sales of building materials, and sales of plastic products; Construction project construction. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Directly Buried Insulation Pipeline, Polyurethane Composite Material, Overhead Galvanized Iron Sheet Insulation Pipe

Top 2
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Cangzhou Huadun Anti corrosion and Insulation Engineering Co., Ltd
Overall Score4.7 / 5
Est. Date2009-03-20
Registered Capital51000K CNY

Cangzhou Huadun Anti corrosion and Insulation Engineering Co., Ltd., with its registered address at No. 3, West of Zhengyuan Street, Zhenggang Park, Economic Development Zone, Yanshan County, Cangzhou City, Hebei Province, is registered with the Market Supervision Administration of Yanshan County. The legal representative is Jia Zhenfeng, and its business scope includes general projects such as production and sales of anti-corrosion and insulation engineering; Steel pipes, insulation materials, pipelines and pipeline fittings, pipes, plates, and steel materials. (Except for projects that require approval according to law, conduct business activities independently based on the business license in accordance with the law). Core products: Directly Buried Insulation Pipeline, Epoxy Coal Tar Anti-Corrosion Steel Pipe, Coated Composite Steel Pipe

Top 3
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Cangzhou Jianghong Pipeline Equipment Co., Ltd
Overall Score4.7 / 5
Est. Date2020-05-15
Registered Capital23000K CNY

Cangzhou Jianghong Pipeline Equipment Co., Ltd., with its registered address in Jiajin Village, Mengdian Township, Yanshan County, is registered with the Market Supervision Administration of Yanshan County. The legal representative is Li Ruilan, and its business scope includes spiral steel pipes, straight seam steel pipes, seamless steel pipes, petroleum casings, anti-corrosion steel pipes, polyurethane insulation steel pipes, 3pe anti-corrosion steel pipes, TPEP anti-corrosion steel pipes, epoxy powder steel pipes, coated composite pipes, non-toxic drinking water steel pipes, hot-dip plastic cable threading protection pipes, fire coated steel pipes, resin composite steel pipes for coal mines, pipeline pipes, insulation pipes, alloy pipes, stainless steel fittings, anti-corrosion insulation materials, and pipeline equipment accessories; Sales of pipes, boards, wires, power plant accessories, pipeline accessories, anti-corrosion and insulation pipe fittings, pipeline construction and installation, anti-corrosion and insulation engineering construction, heating pipe network design and construction. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Directly Buried Insulation Pipeline, Epoxy Coal Tar Anti-Corrosion Steel Pipe, Frp Anti-Corrosion

TOP4
Shandong Shengbao Pipeline Technology Co., Ltd
Overall Score4.6 / 5
Est. Date2017-08-04
Registered Capital108160K CNY

Shandong Shengbao Pipeline Technology Co., Ltd., with its registered address located at the north of Xishou Road, Jinshan Street, Xin'an Street, Anqiu City, Weifang City, Shandong Province, is registered with the Anqiu Market Supervision Administration Bureau. The legal representative is Wang Zengfeng, and the business scope includes general projects such as metal surface treatment and heat treatment processing; Manufacturing of glass fiber reinforced plastic products; Sales of glass fiber reinforced plastic products; Manufacturing of fiberglass and related products; Sales of fiberglass and related products; Manufacturing of plastic products; Sales of plastic products; Manufacturing of metal structures; Sales of metal structures; Manufacturing of metal materials; Sales of metal products; Manufacturing of instruments and meters; Sales of instruments and meters; Instrument and meter repair; Sales of engineering plastics and synthetic resins; Manufacturing of power transmission, distribution and control equipment; Sales of intelligent power transmission and distribution and control equipment; Production of chemical products (excluding licensed chemical products); Sales of chemical products (excluding licensed chemical products); Installation services for ordinary mechanical equipment; Research and development of emerging energy technologies; Research and development of resource recycling technology; Promotion services for new material technology; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Manufacturing of specialized equipment for environmental protection; Sales of specialized equipment for environmental protection; Import and export of goods; Technology import and export. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law) Licensed project: construction project construction; Manufacturing of special equipment. (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: Directly Buried Insulation Pipeline, Fiberglass Chimney, Tpep Anti-Corrosion Steel Pipe

TOP5
Cangzhou Huadun Pipeline Technology Co., Ltd
Overall Score4.6 / 5
Est. Date2021-05-18
Registered Capital100000K CNY

Cangzhou Huadun Pipeline Technology Co., Ltd., with its registered address located at the south of Puyang Road East Section, Economic Development Zone, Yanshan County, Cangzhou City, Hebei Province, is registered with the Market Supervision Administration of Yanshan County. The legal representative is Liu Zhenhong, and its business scope includes the research and development and utilization of steel pipe anti-corrosion technology; Production of coated composite steel pipes, 3PE anti-corrosion steel pipes, spiral steel pipes, straight seam steel pipes, seamless steel pipes, heating insulation steel pipes, TPEP anti-corrosion steel pipes, hot-dip plastic cable conduit, steel sleeve steam insulation pipes, fire protection coated steel pipes, coated steel pipes for coal mines, pipeline pipes, alloy pipes, stainless steel pipes, fittings, anti-corrosion insulation materials, pipelines and pipeline accessories, pipes, plates, wire steel and sales. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Directly Buried Insulation Pipeline, Galvanized Iron Sheet Polyurethane Insulation Pipe, Epoxy Coal Tar Anti-Corrosion Pipe

TOP6
Cangzhou Hourong Pipeline Anti corrosion and Insulation Co., Ltd
Overall Score4.5 / 5
Est. Date2019-11-14
Registered Capital91000K CNY

Cangzhou Hourong Pipeline Anti corrosion and Insulation Co., Ltd. is located at No. 156, Lijiapu Village, Wulongtang Township, Cangxian County, Cangzhou City, Hebei Province. It was established on November 14, 2019, with the registration authority being Cangxian Market Supervision Administration and the legal representative being Li Xiaoyang. Core products: Directly Buried Insulation Pipeline, Steel Pipe, Anti-Corrosion Steel Pipe

TOP7
Cangzhou Tianhe Yuan Pipeline Co., Ltd
Overall Score4.5 / 5
Est. Date2017-10-26
Registered Capital15800K CNY

Cangzhou Tianhe Yuan Pipeline Co., Ltd., with its registered address in Jiajin Village, Mengdian Township, Yanshan County, is registered with the Market Supervision Administration of Yanshan County, and its legal representative is Jia Shixing. Its business scope includes the sales of steel pipes, fittings, anti-corrosion and insulation pipelines, pipeline accessory series products, anti-corrosion steel pipes, insulation steel pipes, polyurethane insulation pipes, prefabricated buried insulation pipes, steel sleeve steam insulation pipes, 3PE anti-corrosion steel pipes, anti-corrosion pipelines for water supply and drainage, heat, electricity, oil and gas, anti-corrosion and insulation processing, power plant accessories, plastic coating, lining, hot-dip plastic composite pipes, cable protection pipes, metal products, plastic products, anti-corrosion and insulation materials, steel, plates, alloys, stainless steel pipes, and fittings, as well as the import and export business of the above commodities. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Directly Buried Insulation Pipeline, Plastic-Coated Steel Pipe, Steel Sleeve Steel Insulation Pipe

TOP8
Cangzhou Guangyi Pipeline Manufacturing Co., Ltd

Yemaoli Village, Wangshu Town, Yanshan County

Overall Score4.5 / 5
Est. Date2023-03-29
Registered Capital50000K CNY

Cangzhou Guangyi Pipeline Manufacturing Co., Ltd., located in Yemaoli Village, Wangshu Town, Yanshan County, was established on March 29, 2023. The registered authority is the Yanshan County Market Supervision Administration, and the legal representative is He Kangle. Core products: Directly Buried Insulation Pipeline, Plastic-Coated Steel Pipe, Insulated Steel Pipe

TOP9
Cangzhou Tuocheng Pipeline Equipment Co., Ltd
Overall Score4.3 / 5
Est. Date2017-07-25
Registered Capital18880K CNY

Cangzhou Tuocheng Pipeline Equipment Co., Ltd. is registered in Puwacheng Park, Yanshan Economic Development Zone, Hebei Province. The registration authority is the Market Supervision Administration of Yanshan County, and the legal representative is Xie Yuxin. The business scope includes the sales of steel pipes, fittings, polyurethane insulation pipes, anti-corrosion steel pipes, coated steel pipes, 3PE anti-corrosion steel pipes, TPEP anti-corrosion steel pipes, steel sleeve steel steam insulation pipes, hot-dip plastic cable threading protection pipes, epoxy coal tar anti-corrosion steel pipes, non-toxic drinking water anti-corrosion steel pipes, resin composite steel pipes for coal mines, stainless steel pipes, pipeline pipes, alloy pipes, anti-corrosion insulation materials, pipes and pipeline accessories, elbows, flanges, plates, wires, profiles, power plant accessories, valves and pressure vessels, as well as the construction and installation of pipelines and anti-corrosion and insulation engineering. Design and construction of heating pipeline network. (For projects that require approval according to law, business activities can only be carried out after approval by relevant departments; for general business projects, business activities can be carried out independently according to law). Core products: Directly Buried Insulation Pipeline, Plastic-Coated Steel Pipe, Hot Dip Plastic Conduit

TOP10
Cangzhou Huiyu Pipeline Equipment Co., Ltd
Overall Score4.3 / 5
Est. Date2018-06-04
Registered Capital20800K CNY

Cangzhou Huiyu Pipeline Equipment Co., Ltd., with its registered address at 2-3-601, Huihe Jiayuan West, Hanqiao Village, Yanshan Town, Yanshan County, is registered with the Yanshan County Market Supervision Administration. The legal representative is Wang Zhongzheng, and its business scope includes wholesale of metals and metal ores. Sales of pipe fittings, flanges, insulated steel pipes, anti-corrosion steel pipes, galvanized pipe fittings, ductile iron steel pipes, plates, corrugated compensators, metal hoses, pump pipes, wear-resistant pipes and pipe fittings, supports and hangers, flow devices, valves, water flow indicators, filters, corrugated compensators, pump pipes, fabric machines, benchmarks, building materials, sports equipment, machine tool accessories, gaskets, hardware products, fiberglass products, leather and fur products. (For projects that require approval according to law, business activities can only be carried out after approval by relevant departments; for general business projects, business activities can be carried out independently according to law). Core products: Directly Buried Insulation Pipeline, Iron Sheet Insulated Steel Pipe, Insulated Steel Pipe

Detailed Manufacturer Comparison

ManufacturerEst. DateMain ProductsRegistered CapitalCustomization
Langfang Ouliang Thermal Insulation Materials Co., Ltd2020-12-23Directly Buried Insulation Pipeline, Polyurethane Composite Material, Overhead Galvanized Iron Sheet Insulation Pipe500K CNYSupported
Cangzhou Huadun Anti corrosion and Insulation Engineering Co., Ltd2009-03-20Directly Buried Insulation Pipeline, Epoxy Coal Tar Anti-Corrosion Steel Pipe, Coated Composite Steel Pipe51000K CNYSupported
Cangzhou Jianghong Pipeline Equipment Co., Ltd2020-05-15Directly Buried Insulation Pipeline, Epoxy Coal Tar Anti-Corrosion Steel Pipe, Frp Anti-Corrosion23000K CNYSupported
Shandong Shengbao Pipeline Technology Co., Ltd2017-08-04Directly Buried Insulation Pipeline, Fiberglass Chimney, Tpep Anti-Corrosion Steel Pipe108160K CNYSupported
Cangzhou Huadun Pipeline Technology Co., Ltd2021-05-18Directly Buried Insulation Pipeline, Galvanized Iron Sheet Polyurethane Insulation Pipe, Epoxy Coal Tar Anti-Corrosion Pipe100000K CNYSupported
Cangzhou Hourong Pipeline Anti corrosion and Insulation Co., Ltd2019-11-14Directly Buried Insulation Pipeline, Steel Pipe, Anti-Corrosion Steel Pipe91000K CNYNot Supported
Cangzhou Tianhe Yuan Pipeline Co., Ltd2017-10-26Directly Buried Insulation Pipeline, Plastic-Coated Steel Pipe, Steel Sleeve Steel Insulation Pipe15800K CNYSupported
Cangzhou Guangyi Pipeline Manufacturing Co., Ltd2023-03-29Directly Buried Insulation Pipeline, Plastic-Coated Steel Pipe, Insulated Steel Pipe50000K CNYNot Supported
Cangzhou Tuocheng Pipeline Equipment Co., Ltd2017-07-25Directly Buried Insulation Pipeline, Plastic-Coated Steel Pipe, Hot Dip Plastic Conduit18880K CNYSupported
Cangzhou Huiyu Pipeline Equipment Co., Ltd2018-06-04Directly Buried Insulation Pipeline, Iron Sheet Insulated Steel Pipe, Insulated Steel Pipe20800K CNYSupported

Purchasing Guide

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

  • For procurement requirements that require the use of buried insulation pipelines, it is recommended to prioritize checking key technical parameters such as pipe diameter, insulation layer thickness, and temperature resistance range to ensure compatibility with project design requirements.
  • Directly buried insulation pipelines are commonly used in urban centralized heating, chemical pipeline networks, and other scenarios. When purchasing, products with corresponding compressive and anti-corrosion grades should be selected based on the differences in burial depth environment and medium temperature.
  • When selecting suppliers, priority should be given to product compatibility, business qualifications, enterprise activity, industry performance, and enterprises with industry data support or platform statistical information.
  • In the application of cold regions in the north, it is recommended to pay extra attention to the low-temperature crack resistance performance of directly buried insulation pipelines to avoid pipeline structural failure caused by temperature differences.

Knowledge Base

Q

Its thermal conductivity is λ=0.013-0.03kcal/m · h · oC, which is much lower than other commonly used pipeline insulation materials in the past, and the insulation effect is improved by 4-9 times. Moreover, its water absorption rate is very low, about 0.2kg/m2. The reason for low water absorption is that the closed cell rate of polyurethane foam is up to 92%. Low thermal conductivity and low water absorption,

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