?????? ?????? ?????? ??????? ????? ?????
????? ???????:
?????? ?????? ?????? ??????? ????? ????? ?? ??? ???? ?? ?????? ?????? ?????? ?? ??? ???? HTIDC ?????? ?? ???? ??? ???? ?????? ?? ????? ?? ???? ?????? ?????? ?????? ????? ??????? ??????. ???? ????? ???? ????? ??? ??????? ??????? ?????? ??????? ?????? ???? ????? ?? ????? ????? ?????? ????? ??? ??? ????.
?????????:
:???????
1.???? ?????? ??????
?????? ??????? ??????? ?????? ?????? ??????? ????? ????? ?? PE80/PE100 (??? ????????)
????? ???? ?????? ?????? 80 / PE100 (??? ????????)
Characteristics | Test Standard | Unit | Result |
Melt Flow Index(5Kg,190℃) | ASTM D 1238 | G/10min | 0.56 |
Density | ASTM D 792 | G/cm3 | 0.954 |
Tensile Yield Strength | ASTM D 638 | Kg/cm2 | 230 |
Tensile Fracture Strength | ASTM D 638 | Kg/cm2 | 370 |
Tensile & Elongation Ratio | ASTM D 638 | % | ≥600 |
Brittleness Temperature | ASTM D 746 | ℃ | ≤-70 |
Linear Expansion Coefficient | DIN 53752 | K-1 | 1.3x10-4 |
ESCR (F50) | ASTM D 1689 | HR | ＞2000 |
Thermal Stability | ISO 10837 | min | ＞20 |
Grade | ASTM D 4131(B) | PE 80 | |
Long-term Hydrostatic Strength | ISO 9080 | MPa | 9.33 |
Short-term Hydrostatic Strength | ASTM D 4131 | HR | ＞165 |
2.??? ??????? ????? ????? ????? ??? ???????? ?????????? ?? ????? ????? ??????
??? ??? ?????? ?? ???? ????? ??? ?? 20 ???? ????? ?? ???? ????? ??? ???? ????????. ???? ?????? ??? ????? ???????? ??? ???? ????? ???? ???? ????? ?????? ?????? ?? ??????? ?? ??????? ????? ????? ??????? ?????.
Temperature t,℃ | 0＜t≤20 | 20＜t≤30 | 30＜t≤40 | 40＜t≤50 | 50＜t≤60 | 60＜t≤70 | 70＜t≤80 |
Pressure reduction factors | 1 | 0.95 | 0.9 | 0.86 | 0.81 | 0.7 | 0.6 |
3.???????? ??????? ??????? ?????? ?????? ??????? ????? ?????
Linear expansion coefficient (1/℃) | 35.4-35.9x10-6 |
Heat reversion (%) | ≤0.4 |
Out-of roundness | ≤5 |
Elasticity modulus(GPa) | 2-3 |
Thermal conductivity at 20℃ | 0.43 |
Surface resistance （Ω） | ＞1013 |
Volume resistance(Ω.cm) | ＞1016 |
Electric strength (kv/cm) | 700 |
Absolute roughness (mm) | 0.01 |
Vicat softening temperature (℃） | 117.9 |
Tensile yielding strength (MPa) | 22-23 |
Shore hardness | 60 |
Impact strength (Notched)(J/mm2) | 15 |
Bend creep modulus (MPa) | A |
4.???? ?????? ?????? ??????? ??????? ????? ?????
No. | Item | Performance | |
1 | Stability under pressure | No cracking | |
2 | Contractility rate of portrait size (110℃ 1h) % | ≤0.4 | |
3 | O.I.T(200℃)/min | ≥20 | |
4 | Short term hydrostatic strength test | Temp: 20, Time: 100h, Pressure: nominal pressure×1.5 | No cracking and leakage |
Temp: 80 Time: 165h Nominal pressure×1.5×0.6 | No cracking and leakage | ||
5 | Burst test | Bust pressure≥nominal pressure×3 | |
6 | Weathering resistance test(accumulated reception≥3.5 kMJ/m2) | Still meet the performance requirement of Item 3 and 4 in this Table | |
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??? ????? ??????? ???????? ???????? ??????? ?????????? ??????? ????? ??????????????? ????? ????? ??????? ?????? ?????? ??????? ????? ????? ASTM D2837, D1598, D1599? ????? ?? ?????? ??? ?????? ?????? ??????? ????? ???? ???????? ???? ????? ?????? ?????? ?????? ???????????.
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