- Overview
- Product Description
- Our Advantages
- Connection Method
- Appliation Cases
- Company Profile
- Certifications
- Packaging & Shipping
- FAQ
Basic Info.
Product Description
| 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. | |||
2. Sleeve pipe: Manufactured using specially modified flame-retardant and anti-static polyethylene resin, processed by a single screw extrusion machine. It boasts excellent impact resistance, robust isolation effects, and superior corrosion resistance.
3. Polyurethane insulation layer: Utilizing advanced flame-retardant polyurethane foam through high-pressure injection, this layer impeccably fills the gap between the casing and the working steel pipe. It offers outstanding insulation with low thermal conductivity, high compression strength, minimal water absorption, and a high closure rate.
2. High strength and excellent toughness make it easy to weld and convenient for construction.
3. Featuring low thermal conductivity and exceptional waterproof and corrosion resistance, it can be directly buried in the ground or water.
4. Simple connection options including flange and quick joint connections.
5. With a long service life, it can perform effectively in environments ranging from -20ºC to 120ºC for over 30 years.
In November 2017, Donghong proudly marked a significant milestone by listing on the main board of Shanghai, becoming the first main board-listed company in China's engineered composite piping system sector.
Boasting a national CNAS laboratory, cutting-edge test equipment, and rigorous testing protocols, Donghong collaborates on the development of new products, materials, and innovative connection types. This comprehensive approach ensures the unwavering quality, stability, and reliability of our products.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WARS certifications, with all metrics exceeding standard requirements. Feel free to specify your required national standard, and we will verify or test it for you.
2. What kind of services do you offer?
As a manufacturing factory, we provide high-quality pipe products, pipe fittings, packaging, and shipping. As a professional consultation company, we offer project consulting advice, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we provide pipeline contracting services, pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer extensive customization in materials, specifications, logos, packaging, connection methods, and more. Our professional team can also provide tailored solutions for your specific projects, with numerous successful cases to demonstrate our capability.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your goods?
We warmly invite all customers to visit our company and inspect our goods firsthand. We can also conduct stringent tests as per customer requirements before confirming an order. Additionally, we can dispatch samples for customers to perform their own tests to ensure product quality before the bulk production.