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TYPE |
Multilayer Pipe |
|||
Overlapped welded |
A (PE-AL-PE) |
B1 (PEX-AL-PEX) |
B (PERT-AL-PERT) |
C (PE-AL-PE) |
Roughness (mm) |
0.0007 |
0.0007 |
0.0007 |
0.0007 |
Melting point (℃) |
135 |
－ |
127 |
127 |
Density (g/cm3) |
0.941-0.959 |
0.926-0.959 |
0.926-0.940 |
0.941-0.959 |
Modulus of elasticity (MPa) |
7200 |
7200 |
7200 |
7200 |
Thermal conductivity (w/mK) |
0.45 |
0.45 |
0.45 |
0.45 |
Coefficient of thermal expansion (mm/mK) |
0.025 |
0.025 |
0.025 |
0.025 |
Material |
Test item |
Requirement |
Polyethylene |
Density |
HDPE: 0.941~0.959 g/cm3 MDPE: 0.926~0.941 g/cm3 |
(PEX) |
Melt flow index |
HDPE, MDPE≥0.1 g/10min (190, 2.16kg) |
Tensile strength |
HDPE≥21MPa; MDPE≥14MPa |
|
Enlongation |
≥400% |
|
Vicat soft point |
Vicat soft point≥105℃ |
|
Cross-linking degree |
≥65% |
|
ESCR |
≥165h |
|
Color masterbatch |
Moisture content |
≤0.15% |
Appearance |
Uniform granual |
|
Volatile content |
≤0.5% |
|
catalyst |
Density |
≥0.93 g/cm3 |
Melt flow index |
≥0.9 g/10min (190℃, 5.00kg) |
|
Volatile content |
≤0.35% |
|
Adhesive resin |
Appearance |
Uniform granual |
Density |
≥0.926 g/cm3 |
|
Melt flow index |
2.0~6.0 g/10min (190℃, 2.16kg) |
|
Vicat soft point |
Vicat soft point≥105℃ |
|
T peeling strength |
≥70N/25mm |
|
Aluminum |
Surface quality |
Water brush test≥class |
Tensile strength |
105MPa～125MPa |
|
Appearance |
Without oil on surface |
|
Hardness (HV) |
28～33 |
|
T peeling strength |
Minimum value≥60N/25mm |
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