(1) plastic pipe punching resistance test (from GB / T 14152-2001) equipment
① drop hammer impact testing machine
a, drop hammer structure shown in Figure 1. Falling hammer with steel material manufacturing, falling hammer impact of the face should be no dent and scratches the impact of detection results such as defects. The standard size and quality of the hammer are shown in Table 1 and Table 2.
Test on Impact Resistance of Plastic Pipe
Figure 1 hammer hammer structure
Table 1 size of the hammer hammer unit: mm
Model Rs d ± 1 ds α / (°)
d25 50 25 any arbitrary
d90 50 90 any arbitrary
Table 2 Recommended drop weight unit: kg
0.5 1.6 4.0 10.0 1.0 2.5 6.3 16.0
0.8 2.0 5.0 12.5 1.25 3.2 8.0
Note: The allowable tolerance for drop weight is ± 0.5%.
b, drop hammer release device height can not be less than 2m. In the case of a test, the distance between the fixed position of the drop hammer and the surface of the specimen is accurate to ± 10 mm.
c, the device should have to prevent the impact of the second hammer backhammer device.
② test should have a length of not less than 200mm120 ° V-shaped pallets. V-shaped pallets should be able to ensure that the drop hammer impact point accurately falls within 2.5mm of the V-shaped pallet centerline.
(2) drop hammer impact test method
① The length of the test tube for the test test is (200 ± 10) mm.
(2) If the diameter of the test pipe is greater than 40 mm, the equidistant markings are drawn along the length of the pipe and are numbered consecutively (each marking distance is generally greater than 50 mm and can also be specified in the standard GB / T 14152-2001). Pipe diameter less than or equal to 40mm pipe samples, each sample only one impact.
③ the test tube should be placed in the (20 ± 2) ℃ environment before the test, not less than 1h. Pipe thickness greater than 8.6mm The specimen should be placed in a (20 ± 2) ° C environment for no less than 2 hours.
④ test, the impact of falling hammer on the sample tube [ambient temperature (0 ± 1) ℃ or (20 ± 5) ℃] test time, should be completed within 60s. The diameter of less than or equal to 40mm of the sample tube, only to withstand an impact test; tube diameter greater than 40mm test tube impact test, the first impact on the No. 1 mark, if the sample is not broken, it should be within the specified time , And then hit the No. 2 marking, until the sample rupture or all the marking are impact once, to obtain the results.