1. Structural Form

Work Fittings: Steel pipe fittings, PERT fittings, PE fittings, etc.

Insulation: Rigid polyurethane foam used.

Leakage Alarm Wire: During the manufacturing of high-temperature pre-fabricated buried thermal insulation pipes, an alarm wire is embedded in the insulation layer near the steel pipe. Should a leakage occur at any point in the pipeline, the alarm wire transmits the signal, triggering an alarm on a dedicated detection instrument and displaying the exact location and severity of the leakage. This allows maintenance personnel to quickly address the leaking section, ensuring the safe operation of the heating network.

Outer Sheath: High-density polyethylene outer sheath, glass fiber reinforced plastic outer sheath, galvanized iron sheet, etc.

2. Application Scope

Polyurethane buried insulation pipe fittings are suitable for heat preservation and cooling of liquids and gases with medium temperatures not exceeding 150°C and pressures not exceeding 2.5 Mpa.

Steel clad steel straight buried thermal insulation pipe fittings are suitable for heating and cooling of liquids and gases with a medium temperature not exceeding 350°C and a pressure not exceeding 2.5 MPa.

3. Execution Standards

High-Density Polyethylene (HDPE) Outer Sheath Polyurethane Foam Pre-fabricated Direct Burial Insulation Pipe (GB/T 29047-2012)

High-Density Polyethylene Outer Sheath Polyurethane Foam Pre-fabricated Direct-Burial Insulated Pipe (CJ/T 114-2000)

Integrated pre-insulated pipe system for underground hot water networks - Insulating pipes consisting of a working steel pipe, polyurethane insulation, and polyethylene outer sheath (EN253-2003).

"Technical Conditions for Pre-fabricated Direct Burial Steam Insulation Pipelines for Urban Heating (CJ/T200-2004)"

"Technical Code for Pre-fabricated Direct Buried Steam Pipeline for Urban Heating (CJJ104-2005)"

4. Service Life

Continuous use for 30 years under normal operating conditions.