Performance Characteristics
Mechanical properties
No.
| Item | Index
|
1 | Hydraulic Test | Test conduct under MT558.1-2005, PE80 hoop stress 9.0Mpa, PE100 hoop stress 12.0 Mpa. Keep for 100 hours, pipe no fracture & no leakage. |
2 |
Negative pressure resistance test | Testing negative pressure 0.097 Mpa, keeping 100 hours. Pipe performs no damage or transformation. |
3 | Flat Peoperty | Pipe inner side being pressed to flat, the entire body no crack or damage. |
4 |
Falling weight impact test | Test conduct under MT558.2-2005, 9 of 10 pipes no crack or damage. |
5 |
Elongation at break | ≥ 300% |
Note:Above performance is normalization requirements, in order to explain the standard of features. And the negative pressure resistance test only applicable to gas extraction pipe. |
Flame retardant and antistatic properties
No.. | Item | Index
|
1 | Surface Resistivity | Water supply & drainage pipe: the arithmetic mean value of outer surface should ≤10x109Ω. |
Positive pressure air pipe: the arithmetic mean value of outer surface should ≤10x108Ω. |
Pipe for shotcrete: the arithmetic mean value of outer surface should ≤10x108Ω. |
Negative pressure air pipe: the arithmetic mean value of outer surface should ≤10x106Ω.
|
Gas extraction pipe: the arithmetic mean value of outer surface should ≤10x106Ω.
|
2 |
Alcohol burner burning
|
The arithmetic mean value of flame burning time for 6 tested pipes should ≤3 seconds. Single pipe should ≤ 10 seconds. |
The arithmetic mean value of flameless burning time for 6 tested pipes should ≤20 seconds. Single pipe should ≤ 60 seconds.
|