| Model NO. | DH-The thermal insulation-BWGG |
| Connection Type | Welding/Socket |
| Diameter | 420-2080 mm |
| Material | Carbon Steel |
| 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 |
| Main Insulation | Polyurethane Foam |
| Working Tubes | Q235B, 355b, 20# Oryour Request |
| Temperature Classification | High Temperature Piping |
| Standard | ASTM, API, CE/ISO |
| Medium | Liquid |
| Cross-Section Shape | Round |
| Transport Package | Standard Package |
| Trademark | DHPI |
| Origin | China |
| HS Code | 3917330000 |
| Production Capacity | 500000 Kilometers /Year |
Product Description
Polyurethane-foam tubing is most often used to insulate central heating and domestic-water pipelines. This material is resistant in the temperature range -50°C to 135°C, and has a low heat-transfer coefficient. Such a thermal insulator is rigid, and perfectly protects pipes from damage. Tubing made of polyurethane foam is distinguished by its high level of resistance to chemicals. It comes in a soft, hard, and super-hard versions.
Rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe adopts advanced polyurethane spray polyethylene winding online forming technology, which improves the uniformity of foam density and consistency of insulation layer thickness, saves materials, reduces labor costs, and is suitable for Transport hot water with a temperature not higher than 140°C.
Connection Method
Welding joint demonstration
New connection method :The flexible socket spray polyurethane foam winding PE insulation pipe
This connection method is Donghong's new insulation pipe connection method. It does not require welding or patching during construction. It is quick and easy to install and can greatly improve construction efficiency.
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.
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.
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.
1. There is no need for support, less heat loss, and the phenomenon of "support thermal bridge" completely disappears;
2. High strength, good toughness, easy welding, convenient construction;
3. Low thermal conductivity, with strong waterproof and corrosion resistance, can be directly buried in the ground or water;
4. Easy connection, can be used flange, quick joint connection;
5. Long service life, can be used in -20ºC ~ 120ºC environment for more than 30 years
Appliation Cases
Certifications
