Pre Insulated Pipe | Polyurethane Foam Insulation Pipe
A pre-insulated pipe with polyurethane foam insulation is a high-performance solution designed for the efficient transport of fluids, typically used in heating and cooling systems, or other industrial applications.
These pipes are characterized by their composite structure:
- Carrier Pipe: The innermost layer, or carrier pipe, is typically made of steel, copper, or plastic. This pipe is the conduit for the fluid being transported.
- Insulation Layer: The carrier pipe is surrounded by a layer of polyurethane foam insulation. This material is renowned for its excellent thermal insulation properties, keeping the transported fluid at a constant temperature and thereby minimizing energy loss. It’s a closed-cell foam, which means it’s also resistant to water. The foam’s density usually ranges between 30-45 kg/m3.
- Protective Jacket: The insulation layer is then enclosed within a protective outer jacket or casing. This can be made from a variety of materials, including steel, aluminum, or High-Density Polyethylene (HDPE), chosen for their mechanical strength and resistance to environmental conditions.
The advantages of using polyurethane foam insulation include high thermal insulation (high R-value), resistance to moisture, lightweight structure, compatibility with various carrier pipe materials, ease of fabricating joints and fittings, and consistent insulating properties over time.
These pre-insulated pipes are commonly used for transporting hot or cold liquids in HVAC systems, industrial processes, geothermal applications, and more. They are often installed underground or utilized in settings like refineries, power plants, and Liquefied Natural Gas (LNG) facilities.
The pipes are available in a wide range of sizes, with diameters from 1/2″ to over 60″. Smaller sizes are generally used in plumbing and HVAC applications, while larger sizes are used in industrial applications.
Pre-insulated pipes are usually prefabricated in straight lengths, which can then be joined in the field using a process called polyurethane foam welding.
Finally, these pipes and their insulation material must meet specific standards to ensure their performance and safety. The polyurethane insulation material should comply with ASTM C1440, and the pipe should meet the ASTM F754 standard.
In summary, pre-insulated pipes with polyurethane foam insulation offer a highly effective, durable, and energy-efficient solution for fluid transportation.
| Product Indexes | Reference Standard | Standard Requirement | Our product value |
| Outer protection pipe | |||
| Density (kg/m3 ) | CJ/T114-4.2.3.1 | ≥940 | 948.2 |
| Elongation at break (%) | CJ/T114-4.2.3.4 | ≥350 | 618 |
| Tensile yield strength (MPa) | CJ/T114-4.2.3.4 | ≥19 | 20.5 |
| Longitudinal shrinkage rate (%) | CJ/T114-4.2.3.5 | ≤3 | 1.23 |
| Long term Mechanical properties | CJ/T114-4.2.3.6 | >1500h(80℃,4.0 MPa)free from damage | Pass |
| The difference of the melt flow rate (g/10min) | CJ/T114-4.2.3.2 | ≤0.5 | 0.11 |
| Carbon Black Content % | CJ/T114-4.2.3.1 | 2.5±0.5 | 2.4 |
| Polyurethane insulation layer | |||
| Density (kg/m³) | CJ/T114-4.3.2 | ≥60 | 71.1 |
| Average pore size (mm) | CJ/T114-4.3.1 | ≤0.5 | qualified |
| Percentage of close area(%) | CJ/T114-4.3.1 | ≥88 | 94 |
| Compressive strength(MPa) | CJ/T114-4.3.3 | ≥0.3 | 0.58 |
| Water absorption(%) | CJ/T114-4.3.4 | Immersion in boiling water 90 minutes, bubble water absorption should be not more than 10% | ≤5.53 |
| Working steel pipe | |||
| Seamless steel pipe(≤DN150) | GB8163 | 20# | qualified |
| Spiral steel pipe(≥DN200) | GB/T9711 or SY/T5037 | Q235B | qualified |
PRODUCT FEATURES
| Product name | Thermal insulation direct buried pipe |
| Length | 5.8m-12m, or by customer’s requirements |
| Nominal diameter | DN25-1800 |
| Laid way | Buried |
| Application | Fluid Pipe, Natural gas, Gas, Oil, Hydraulic, chemical, drill, etc. |
| Production Standard | The national standard GB/T29047-2012, CJ/T114-2000, CJ/T155-2001 |
TECHNICAL INDICATORS
| Nominal diameter | OD ×Thickness(mm) | Outer protection tube diameter ×Wall thickness(mm) | Insulation thickness(mm) |
| 25 | 32×3 | 90×2.3 | 29 |
| 32 | 43×3 | 110×2.5 | 33 |
| 40 | 48×3 | 110×2.5 | 31 |
| 50 | 57×3 | 125×2.5 | 34 |
| 65 | 76×3.5 | 140×3 | 33 |
| 80 | 89×4 | 160×3.0 | 33 |
| 100 | 108×4 | 200×3.2 | 36 |
| 125 | 133×4.5 | 225×3.5 | 46 |
| 150 | 159×4.5 | 250×3.9 | 45.5 |
| 200 | 219×6 | 315×4.9 | 48 |
| 250 | 273×6 | 365×5.6 | 46 |
| 300 | 325×7 | 420×7 | 47.5 |
| 350 | 377×7 | 500×7.8 | 61.5 |
| 400 | 426×7 | 550×8.8 | 62 |
| 450 | 478×7 | 600×9.8 | 61 |
| 500 | 529×7 | 655×9.8 | 63 |
| 600 | 630×8 | 760×11 | 65 |
| 700 | 720×8 | 850×12 | 65 |
| 800 | 820×9 | 960×13 | 70 |
| 900 | 920×10 | 1054×14 | 67 |
| 1000 | 1020×12 | 1155×14 | 77 |
| 1200 | 1220×12 | 1380×15 | 80 |
| 1400 | 1420×14 | 1680×16 | 114 |
FAQ
Pre-Insulated Pipes • Heat loss during transfer is at a minimum level. • Provides ease of use, transportation and assembly. • It is resistant to corrosion. • It has a lifetime of more than 50 years under 120 ° C continuous temperature. • Due to the heat conduction coefficient of the polyurethane used, there is less heat loss compared to the classical system.Because the sheath pipe is HDPE, it provides 100% sealing.
abtersteel manufactures its product range for district cooling strictly in compliance with EN17415-1, EN17415-2, EN17415-3, EN489 and other relevant standards, which will ensure a technical lifetime of minimum 50 years when designed and installed correctly.
Polyurethane foam insulated steel pipe also referred as urethane foam pre-insulated piping, PU district heating pipesis the insulation pipe with rigid polyurethane foam plastic as its insulation material, made of inner carrier steel pipes, middle rigid polyurethane foam insulation layer and outer protective layer.
Pre-insulated pipes, manufactured in accordance with the TS EN 253 standard, have an insulation lifespan of 30 years when continuously operated at 120-140℃, 50 years at 115℃, and over 50 years at temperatures below 115℃.
Pre-insulated pipes are manufactured under TS EN 253 standards and offer 30 years of service life at 120°C, 50 years of service life at 115°C and more than 50 years of service life below 115°C.
Polyurethane insulation pipe (black jacket insulation pipe, polyurethane insulation pipe and its connecting parts, including insulation tee, insulation reducer, insulation elbow, insulation bend pipe, insulation fixed joints, etc.) is suitable for urban heating, electric heating, water transmission and insulation, oil pipeline, plumbing pipe, air conditioning pipe, electric power pipe, thermal pipe...Pipeline insulation buried in the project is widely used .It has many advantages, such as environmental protection and energy saving, anti-corrosion and heat preservation, anti-freezing and cold resistance, economy and beauty, and reducing heat loss.
