Jinhang Pipeline supplies pre-insulated pipe bends for district heating systems, underground hot water pipelines, and industrial thermal networks. Each bend consists of a steel carrier pipe, a polyurethane (PU) foam insulation layer, and a high-density polyethylene (HDPE) outer casing, providing thermal insulation and external protection for buried pipeline systems.
Available in 45°, 90°, 180°, and customized angles, our pre-insulated pipe bends can be manufactured in different diameters, wall thicknesses, bend radii, and insulation thicknesses to meet project requirements. We provide customized solutions for various pipeline applications, with material and dimensional options available upon request.
| Item | Specification |
|---|---|
|
Product Name |
Pre-insulated Pipe Bends |
|
Product Type |
45°, 90°, 180° Bends; Customized Angles |
|
Carrier Pipe Material |
Carbon Steel; Stainless Steel; Alloy Steel |
|
Insulation Material |
Polyurethane (PU/PUR) Foam |
|
Outer Casing Material |
High-Density Polyethylene (HDPE) |
|
Nominal Diameter |
DN20–DN1000 |
|
Bend Angle |
45°, 90°, 180°, Customized |
|
Design Pressure |
≥ 1.6 MPa (EN 448 scope) |
|
Operating Temperature |
Up to +148°C |
|
Insulation Structure |
Steel Carrier Pipe + PU Foam Insulation + HDPE Outer Casing |
|
Connection Type |
Butt Weld |
|
Application |
District Heating, Underground Hot Water Pipelines, Industrial Thermal Pipelines |
|
Applicable Standard |
EN 448:2025 |
|
Customization |
Available Upon Request |
|
Component |
Available Materials |
|---|---|
|
Carrier Pipe |
Carbon Steel, Stainless Steel, Alloy Steel |
|
Carbon Steel |
ASTM A106 Gr. B, ASTM A53 Gr. B, API 5L Gr. B, ASTM A333 Gr. 6 |
|
Stainless Steel |
ASTM A312 TP304/304L, TP316/316L |
|
Alloy Steel |
ASTM A335 P11, P22, P91 |
|
Insulation Layer |
Polyurethane (PU/PUR) Foam |
|
Outer Casing |
High-Density Polyethylene (HDPE) |
Jinhang Pipeline manufactures pre-insulated pipe bends in accordance with EN 448, ensuring compliance with international requirements for pre-insulated pipe fitting assemblies used in district heating and underground hot water pipeline systems. Our products are designed to meet project specifications and provide reliable compatibility with different pipeline layouts and operating conditions.
During manufacturing, we control carrier pipe material selection, bending processes, dimensional accuracy, polyurethane (PU) foam insulation, and HDPE outer casing quality. These controls help ensure structural integrity, thermal insulation performance, and long-term protection against external environmental conditions.
District Heating Systems: Used in underground hot water distribution networks to maintain heat efficiency and reduce heat loss.
Underground Heating Pipelines: Connect pipeline sections and accommodate directional changes in buried heating systems.
Industrial Thermal Pipelines: Suitable for transporting hot water and thermal fluids in industrial facilities.
Central Heating Networks: Used in municipal and commercial heating infrastructure.
Power Plants: Applied in thermal water supply and heating pipeline systems.
Oil and Gas Facilities: Used in auxiliary heating and hot water pipeline systems where pre-insulated piping is required.
What are pre-insulated pipe bends used for?
Pre-insulated pipe bends are used in district heating, underground hot water pipelines, and industrial thermal networks to change pipeline direction while reducing heat loss.
What materials are used in pre-insulated pipe bends?
They typically consist of a steel carrier pipe, a polyurethane (PU) foam insulation layer, and a high-density polyethylene (HDPE) outer casing.
What bend angles are available?
Common options include 45°, 90°, and 180° bends. Custom angles are also available upon request.
Which standards do your pre-insulated pipe bends comply with?
Our pre-insulated pipe bends are manufactured in accordance with EN 448 for pre-insulated pipe fitting assemblies.
Can you customize pre-insulated pipe bends?
Yes. We can customize pipe diameter, wall thickness, bend angle, bend radius, and insulation thickness based on customer requirements.
What is the function of the HDPE outer casing?
The HDPE outer casing protects the insulation layer against moisture, soil, and external environmental conditions in underground applications.
Send us your drawings or requirements and get a fast quotation today.
