Thermal insulation direct buried pipe can also be called pre insulated pipe, they are a kind of heat pipeline. We can supply high quality Heating Pipeline, welcome to choose us!
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 | |
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 |
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