Kunshan PVC pipe is good or bad we judge from the surface is not very accurate, and today we look at how the test from the test of PVC pipe in Shaanxi good or bad?

Flat test

1, according to the relevant provisions of the standard MT558.2-2005, take 50 mm of the three samples.

2, the outer diameter of each sample were measured, the sample placed between the two parallel plates, at a rate of 10 mm per minute, MT558.2-2005 standard for each specimen to the outer diameter of the two , In order to ensure product quality, each sample must be pressed to the inner wall of the superposition and no crack damage.

3, were recorded for each specimen coincidence whether good crack damage.

Alcohol burner burning test

1, take the number of samples of 25 mm six.

2, and so the flame stable combustion 5 minutes to 960 ± 60 ℃ when the test began.

3, according to MT558.2-2005 provisions, each sample combustion for 30 seconds, and then were recorded six samples of flameless combustion and flameless combustion of the arithmetic mean.

Drop hammer impact test

1, the number of samples 10, 200 mm for each sample.

2, respectively, put each sample in the V-groove zero.

3, MT558.2-2005 standard diameter greater than or equal to Φ160mm, the drop weight of 3.0 kg, diameter is less than Φ160mm, the weight of 2.0 kg drop weight, in order to assure the use of products under the mine, the special provisions of the diameter When the diameter is less than Φ160mm, the weight of the falling weight is 4.0kg, and the height of the falling weight is two meters. Each specimen has no crack and the failure is qualified.

　4, record the state of each sample after the impact.