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No. | Item | Index | ||||
1 | Elongation at break | ≥350% | ||||
2 | Longitudinal retraction rate | ≤3% | ||||
3 | Oxidation induction time | ≥20min | ||||
4 | Melt mass flow rate | The change rate of pipes and raw materials does not exceed 25% | ||||
5 | Hydrostatic strength (PE80/PE100) | 20℃,100h | Ring Stress:9.0/12.4MPa | No rupture, No leakage | ||
80℃,165h | Ring Stress:4.6/5.5MPa | |||||
80℃,1000h | Ring Stress:4/5.0MPa |
No. | Item | Index | ||||
1 | Oxidation induction time | Oxidation induction time | ≥20min | |||
2 | Melt mass flow rate | The change rate of pipes and raw materials does not exceed 20% | ||||
3 | Welding strength of electrofusion pipe fittings | Percentage of brittle failure≤33.3% | ||||
4 | Socket fittings-welding strength of butt welded fittings | Test failure is toughnessSurface changes are not inferior of 4L | ||||
5 | Impact strength of saddle bypass | No rupture, no leakage | ||||
6 | Hydrostatic strength (PE80/PE100) | 20℃,100h | Ring stress:10.0/12.4MPa | No rupture, no leakage | ||
7 | 80℃,165h | Ring stress:4.5/5.4MPa | ≦5 |