"High Density Polyethylene Black Jacket Polyurethane Rigid Foam Prefabricated Direct Buried Thermal Insulation Pipe" Parameter Description
Authentication: | GB/t29047-2012 | Pattern: | Solid |
Connection method: | Flange connection | Cross Section Shape: | Circle |
Diameter: | DN201-DN300 | Type: | Water |
Model: | Dn377*7 | Specifications: | GB |
Trademark: | Xinjinlong | Packaging: | National Test Report Steel Pipe Material List |
tensile yield strength mpa: | ≧0.3 GB/t8813 | Long-term mechanical properties h: | >1500(80℃/4mpa) |
The environmental stress cracking h: | 140 en253 | Vertical Shrink %: | ≦3 |
Compressive strength mpa: | ≧0.3 GB/t8813 | Density kg/m3: | ≧940 GB/t6343 |
Heat resistance ℃: | 140 en253 | Elongation at break %: | <0.033 GB/t10297 |
Dn200-300: | Dn200dn219dn273dn300 | Polyurethane insulation layer density kg/m3: | ≧60 GB/t6343 |
Yield: | 585274 |
Detailed introduction of "High Density Polyethylene Black Jacket Polyurethane Rigid Foam Prefabricated Direct Buried Insulation Pipe"
Item Unit Index Test method, standard
Density kg/m3 ≧940 GB/T6343
Tensile yield strength Mpa ≧0.3 GB/T8813
Elongation at break % <0.033 GB/T10297
The environmental stress cracking h 140 EN253
Longitudinal shrinkage % ≦3
Long-term mechanical properties h >1500(80℃/4Mpa)
Carbon Black Content % 2.5±0.5
Carbon Black Dispersion nm ≦100
Melt flow rate g/10min difference≦0.5
Main technical indicators of polyurethane insulation layer (Table 2)
Item Unit Index Test method, standard
Density kg/m3 ≧60 GB/T6343
Compressive strength Mpa ≧0.3 GB/T8813
Thermal conductivity W/m.k <0.033 GB/T10297
Heat resistance ℃ 140 EN253
Cold resistance ℃ ≧-50
Closed cell rate % ≧88 GB/T10799
Water absorption ㎏/㎡ ≦10 GB/T114