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 |
Nominal size(D x e) | 14×2.0 | 16×2.0 | 18×2.0 | 20×2.0 | 25×2.5 | 32×3.0 | 40x4.0 | 50x4.5 | 63x6.0 | 75x7.5 | |
Outside diameter (mm) | 14 | 16 | 18 | 20 | 25 | 32 | 40 | 50 | 63 | 75 | |
Tolerance of Outer diameter (mm) | Min | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 | 32.00 | 40.00 | 50.00 | 60.60 | 70.70 |
Max | 14.20 | 16.20 | 18.20 | 20.20 | 25.20 | 32.20 | 40.40 | 50.50 | 63.00 | 75.00 | |
Inside diameter(mm) | 10 | 12 | 14 | 16 | 20 | 26 | 32 | 41 | 51 | 60 | |
Tolerance of Inner diameter (mm) | Min | 9.90 | 11.90 | 13.90 | 15.90 | 19.90 | 25.90 | 30.90 | 39.40 | 49.30 | 57.70 |
Max | 10.20 | 12.20 | 14.20 | 16.20 | 20.20 | 26.20 | 31.90 | 40.80 | 50.80 | 59.70 | |
Pipe thickness (mm) | 2 | 2 | 2 | 2 | 2.5 | 3 | 4 | 4.5 | 6 | 7.5 | |
Tolerance of pipe thickness (mm) | Min | 2.00 | 2.00 | 2.00 | 2.00 | 2.40 | 2.90 | 4.00 | 4.50 | 6.00 | 7.50 |
Max | 2.25 | 2.25 | 2.25 | 2.25 | 2.70 | 3.20 | 4.60 | 5.20 | 6.80 | 8.50 |