Technical Parameter |
Description |
Common range of values |
Material of working stree pipe |
Material type of steel pipe material |
Seamless steel pipe, spiral steel pipe, hot-dip galvanized pipe, welded pipe, black steel pipe |
Working steel pipe diameter |
Inner diameter size of steel pipe |
DN20 - DN1200 and above |
Wall thickness of working steel pipe |
Wall thickness dimension of steel pipe |
Depending on the pipe diameter and pressure |
Density of polyurethane inslution layer |
Density of polyurethane insulation material |
60 - 80 kg/m³ |
Thermal conductivity of polyurethane insulation layer |
Thermal conductivity of polyurethane |
≤0.024 W/(m·K) |
Thickness of polyurethane insulation layer |
Thickness of insulation layer |
30 - 150mm |
Material of outer protective tube |
Material of outer protective tube |
(HDPE) |
Outer protective tube density |
Density of outer protective tube material |
≥950 kg/m³ |
Tenslie yield strength of outer protective tube |
Tensile yield capacity of outer protective tube |
≥19 MPa |
Operation temperature |
Temperature range for normal operation of protective tube |
-50°C --- +120°C |
Compressive strength(Polyurethane insulation layer) |
The ability of the insulation layer to withstand pressure |
≥0.2 MPa |
Water absorption rate(Polyurethane insulation layer) |
The proportion of absorbed by the insulation layer |
≤3% |
Closing rate(Polyurethane insulation layer) |
The proportion of closed pores in the insulation layer |
≥90% |
Corrosion resistance |
Tolerance to acids,bases,salts,etc |
Well |