• Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
  • Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
  • Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
  • Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
  • Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
  • Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping

Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping

Compound Material: Steel Plastic Composite Pipe
Material: PE-PU-C.S
Installation and Connection: Welding or Socket
Technology of Plastic Composite Pipe: Seamless Steel /LSAW / Spiral Welded Steel Pipe
Base Pipe of Plastic Composite Pipe: Welded Steel Pipe
Internal Coating Materials of Plastic Composite Pipe: Polyethylene Coating Steel Pipe
Customization:
Manufacturer/Factory & Trading Company

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Shandong, China
Cooperated with Fortune 500
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ISO9001:2015 certificate
ISO45001:2018 certificate
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  • Overview
  • Product Description
  • Connection Method
  • Product Features
  • Our Advantages
  • Appliation Cases
  • Certifications
  • Company Profile
  • FAQ
Overview

Basic Info.

Model NO.
DH-The thermal insulation-BWGG
Plastic Composite Pipe Coating Form
Inner Coating
Plastic Composite Pipe Model
PE-PU-C.S
Steel Skeleton PE Pipe Use
Municipal, Chemical, Oil Pipeline
Steel Plastic Composite Pipe Model
PE-PU-C.S
Filling Density
60-90 Kg/M3
Foam Core Density
68.9 Kg/M3
Thermal Conductivity
0.029 W/(M.K)
Radial Compressive Strength
0.42 MPa
Water Absorption
5.9 %
Obturator Ratio
95%
Shear Strength
149-195 Kpa , 170ºC, 1450h
Transport Package
by Truck, by Train, by Sea
Trademark
DHPI
Origin
China
HS Code
3917330000
Production Capacity
500000 Kilometers /Year

Product Description

Product Description

Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping


Product Description:

Shandong Donghong Pipe Industry Co., Ltd. offers high-quality polyurethane-foam tubing designed for insulating central heating and domestic-water pipelines. This tubing is resistant in temperatures ranging from -50°C to 135°C, providing excellent protection and low heat transfer. The rigid construction ensures durability and prevents damage to pipes. Additionally, the tubing boasts a high level of chemical resistance, making it suitable for various applications.
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
 
Our rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe utilizes advanced technology to enhance foam density uniformity and insulation layer thickness consistency. This innovative design not only saves materials but also reduces labor costs, making it a cost-effective solution for transporting hot water up to 140°C.

Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Working Steel Pipe Diameter mm Outer Sheath Diameter mm Minimum thickness of outer sheath mm  Insulation layer thickness mm
426 494-554 4.0 30-60
478 547-607 4.5 30-60
529 598-658 4.5 30-60
630 700-760 5.0 30-60
720 790-850 5.0 30-60
820 891-951 5.5 30-60
920 992-1052 6.0 30-60
1020 1093-1153 6.5 30-60
1120 1194-1254 7.0 30-60
1220 1316-1436 8.0 40-100
1420 1538-1678 9.0 50-120
1620 1760-1880 10.0 60-120
1820 1960-2080 10.0 60-120
Note: can be customized as customer's needs.

Connection Method

 
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Pipe fittings is an extremely important part of the piping system, but also the weak link in the quality of engineering construction, in order to protect the quality of customer projects, Donghong Pipeline has built a supporting steel pipe fittings, plastic key production workshop, can design and produce a full range of matching fittings, to provide integrated solutions for the customer and the project.


The flexible socket connection insulation pipe


Donghong Pipeline newly developed flexible socket connection insulation pipe, the installation method is faster than the original welding connection construction, to avoid the defects brought about by welding patches in the construction.
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping


Insulation pipe patch demonstration
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping

Product Features

 
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Core indicators such as thickness, density, thermal conductivity, closed cell rate and water absorption are uniform, and the overall stability is good.
The axis eccentricity is small, the thermal conductivity is low, and the overall heat preservation effect is good.
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
The online spraying of polyurethane has high reactivity, good bonding effect with the steel pipe and the outer protective layer, and the insulation pipe is little affected by temperature change, and no delamination phenomenon occurs.
The surface of the insulation layer is flat, the thickness deviation is small, and the adjustment range is large.
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
The outer protective layer adopts polyethylene winding method, the wall is thin and uniform, the shrinkage rate is small, the deformation and stress are small, the overall mechanical properties are good, and the problem that the outer protective layer is easy to crack is solved.
Reduce the thickness of polyethylene outer protective layer, save cost, under the same insulation conditions, reduce the deformation and stress of the outer protective layer, the thickness of the outer protective layer can be greatly reduced.
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
 

Our Advantages


Shandong Donghong Pipe Industry Co., Ltd. offers a revolutionary pipe solution with the following key features:

  1.  No need for support, minimal heat loss, and eliminates the "support thermal bridge" effect.

  2.  High strength, excellent toughness, easy welding, and convenient construction.

   3. Low thermal conductivity, superior waterproofing, and corrosion resistance for direct burial in soil or water.

   4. Simple connection using flange or quick joint for easy installation.

    5.Durable with a long service life, suitable for environments ranging from -20ºC to 120ºC for over 30 years.
 
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
 
                           Raw material strategic partners Complete production equipment, testing equipment
 
    • Our products at Shandong Donghong Pipe Industry Co., Ltd. meet international standards such as CE, BV, ISO, and wars certificates. We ensure that all our products exceed these standards. Feel free to let us know the national standard you require, and we will check or test it for you.
    • As a manufacturing factory, we offer pipe products, pipe fittings, packaging, and shipping services. Additionally, as a professional consultation company, we provide project consulting advice, pipe system solutions, and design suggestions. We also offer pipeline contractor services, pipe repair services, and free maintenance guidance as an engineering-focused enterprise.
    • We support OEM/ODM services, allowing customization in material, specification, logo, package, connection methods, and more. Our professional team can provide solution suggestions for your specific projects based on successful past cases.
    • Our terms of payment include T/T or L/C at sight. We guarantee the quality of our goods by welcoming customers to visit our company and inspect the products firsthand. We also conduct strict tests as per customer requirements before orders and provide samples for customers to conduct their own tests before bulk production.

    Appliation Cases

    The Classic Project Cases
    Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
    Qingdao Haiyang 4.5 million square meters nuclear energy heating project. It is the first official website of nuclear energy heating in China, and the project uses Donghong's new spray-wound pre-direct buried thermal insulation pipe. These products, uniform density, energy saving, greatly improving the heating transmission energy efficiency, is a new type of environmentally friendly construction products.
    Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
     

    Certifications

    Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
     

    Company Profile

    Welcome to Shandong Donghong Pipe Industry Co., Ltd.


    Shandong Donghong Pipe Industry Co., Ltd. (referred to as Donghong Co., Ltd., stock code: 603856) is a leading engineering pipeline manufacturer based in Qufu, China, the hometown of Confucius. We specialize in designing and providing customized pipelines for various applications, including special pipelines for rainwater and sewage diversion, municipal areas, industrial and mining areas, and national key engineering projects.
    Our company has established a robust industrial ecosystem that involves design institutes, financial institutions, port logistics, construction units, and other key stakeholders. We are dedicated to transforming human life through intelligent pipelines and ensuring the safety of pipeline transportation.

     

    Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
     

     
    Shandong Donghong Pipe Industry Co., Ltd. boasts a team of over 200 R&D experts and holds more than 100 patents. Leveraging national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong is at the forefront of digitalization, informatization, and intelligentization in pipeline engineering.

    Our company leads the development of the engineering pipeline industry and actively contributes to national key strategic projects and people's livelihood initiatives, including the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road, "Two Clear and One Tip", standardized farmland, urban and rural water supply integration, Liren gas, and centralized heat supply.

     
    Pre-Insulated Underground Pipe Underground Hot Water Piping, and Underground Chilled Water Piping
     
     

    FAQ

    1. Is your product meets the international standard ?
    Our products have pass CE, BV, ISO and wars certificate, and all figures indicates higher than standard, you can feel free to let us know which national standard you required, we will check or test it for you.
    2. What kind of service do you offer ?
    As a manufacture fatory, we provide pipe products, pipe fittings, package and shipping; as a professional consulation company we provide project consulting advise, pipe system solutions and design suggestions; as an engineering focused enterprise , we also provide pipeline contractor service and pipe repair service, also can give free maintance guidance.
    3. Do you support OEM/ODM service?
    Yes, we offer customization in material, specification, logo, package , connection methods andothers. Meanwhile, our professional team can offer solution suggestion for your specified projects, we have successfull cases of that service.
    4. What's your terms of payment?
    T/T or L/C at sight.
    5. How can you gurantee the goods you offered is qualified?
    We warmly welcome all customers arrange the visit to our company and see our goods in sight, we can also provide strict test as per customer required before order. Meanwhile, before the bulk production, we can dispatch samples for customer to do their own tests to qualify the products.



     
         
             

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