Insulated elbows are designed for prefabricated pre-insulated piping systems that require changes in pipe direction while maintaining the temperature of the conveyed medium. They typically consist of a steel elbow, a rigid polyurethane (PUR) foam insulation layer, and a high-density polyethylene (HDPE) outer casing. Available configurations include 45°, 90°, and other custom angles, making them suitable for district heating, underground hot water distribution networks, and industrial heat transfer systems.
Jinhang Pipeline can configure insulated elbows according to customer requirements, including pipe dimensions, insulation thickness, outer casing diameter, and actual operating conditions. The steel elbows can be manufactured from carbon steel, stainless steel, or alloy steel, subject to material availability and project specifications.
| Item | Specification |
|---|---|
|
Product Name |
Pre-insulated Elbow |
|
Product Type |
Pre-insulated Pipe Elbow |
|
Fitting Type |
45° Elbow / 90° Elbow / Custom Angle |
|
Nominal Pipe Size |
Customization |
|
Service Pipe Material |
Carbon Steel / Stainless Steel / Alloy Steel |
|
Service Pipe Standard |
EN 448:2025 |
|
Elbow Connection |
Butt Weld |
|
Insulation Material |
Rigid Polyurethane (PUR) Foam |
|
Outer Casing Material |
High-Density Polyethylene (HDPE) |
|
Insulation Structure |
Steel Service Fitting + PUR Foam Insulation + HDPE Outer Casing |
|
Insulation Thickness |
Customization |
|
Application |
District Heating, Underground Hot Water Networks, Industrial Heat Distribution |
|
Inspection |
Dimensional Inspection, Visual Inspection, and specified weld or insulation tests |
|
Customization |
Available |
|
Component |
Available Materials |
|---|---|
|
Service Pipe / Elbow |
Carbon Steel, Stainless Steel, Alloy Steel |
|
Insulation Layer |
Rigid Polyurethane (PUR) Foam |
|
Outer Casing |
High-Density Polyethylene (HDPE) |
Pre-insulated elbows can be manufactured in accordance with EN 448, where applicable, for district heating systems. The assembly consists of a steel elbow, rigid PUR foam insulation, and an HDPE outer casing.
Pipe size, elbow angle, material, insulation thickness, and casing dimensions can be customized to meet project specifications. Dimensional checks and quality inspections help ensure accurate installation and reliable performance.
District Heating Networks: Connects insulated pipeline sections while accommodating changes in routing.
Underground Hot Water Pipelines: Supports directional changes in buried, pre-insulated piping systems.
Industrial Heat Distribution: Suitable for industrial hot water systems when the selected materials and temperature ratings meet design requirements.
Municipal Heating Infrastructure: Used in insulated pipeline networks supplying heat to residential, commercial, and public facilities.
Customized Pipeline Projects: Configured to specified elbow angles, pipe sizes, insulation thicknesses, and outer casing dimensions.
What materials are used in a pre-insulated elbow?
A pre-insulated elbow typically consists of a steel service fitting, rigid polyurethane (PUR) foam insulation, and a high-density polyethylene (HDPE) outer casing. The service fitting material depends on the application and project specifications.
What is the difference between PU and PUR foam?
PU stands for polyurethane, while PUR is commonly used in technical standards and the pre-insulated pipe industry to identify polyurethane rigid foam.
Which elbow angles are available?
Common configurations include 45° and 90° elbows. Other angles may be available according to project drawings and manufacturing capabilities.
Which standards apply to pre-insulated elbows?
EN 448 covers applicable factory-made pre-insulated pipe fittings, while EN 253 addresses relevant factory-made pre-insulated pipe assemblies for directly buried hot water networks.
Can pre-insulated elbows be customized?
Yes. Specifications such as nominal pipe size, elbow angle, insulation thickness, outer casing diameter, and service fitting material can be discussed according to project drawings and technical requirements.
What information is needed for a quotation?
Please provide the nominal pipe size, elbow angle, service pipe material, design temperature, design pressure, insulation thickness, outer casing requirements, applicable standards, and required quantity. Drawings and project specifications can help confirm the appropriate configuration.
Send us your drawings or requirements and get a fast quotation today.
