Performance Characteristics
mechanical property
No. | Item
| norm |
1 | hydraulic test | According to MT558.1-2005 test conditions, PE80 level circumferential stress 9.0MPa. PE100 grade circumferential stress 12.0MPa, pressure preservation 100h, no rupture, no leakage. |
2 | Negative pressure resistance | Under the negative pressure of 0.097MPa, the pressure should be maintained for 100h, and there should be no sucking and damage. |
3 | Flat property | When the pipe is pressed to coincide with the inner wall, there should be no cracks and damage |
4 | Drop weight impact test | According to MT558.1-2005 test conditions, 9 out of 10 samples should have no cracks and Destroy. |
5 | Elongation at break | It should not be less than 300% |
6 | Note: The properties of the above pipes are unified requirements, and relevant standards shall be implemented for detailed performance. Negative pressure resistance is only for negative pressure gas extraction pipe. |
Flame retardant and antistatic properties
| Item
| norm |
1 |
Surface resistance | Supply and drain pipes: the outer wall table and the arithmetical average resistance should not be greater than 10×109Ω |
Positive pressure air duct: The outer wall meter and the arithmetic average value of resistance should not be greater than 10×108Ω |
Spray pipe: inner and outer wall table and the arithmetic mean value of resistance should not be greater than 10×108Ω |
Negative pressure air duct: internal and external wall meters and the arithmetic average value of resistance should not be greater than 10×106Ω |
Gas extraction pipe: inner and outer wall table and the arithmetic average value of resistance should not be greater than 10×106Ω |
2 |
Alcohol burner burning | The arithmetic average of the flame burning time of the 6 samples should not be greater than 3s, and the flame burning time of any sample should not be greater than 10s. |
The arithmetic mean of the flameless burning time of the 6 samples should not be greater than 20s, and the flameless burning time of any sample should not be greater than 60s |