How to sample HDPE double-wall corrugated pipe for inspection? What test items need to be done?

Generally speaking, the hdpe double-wall corrugated pipe needs to be tested: ring stiffness, ring flexibility, oven test, etc.

1. Ring stiffness

Double-wall corrugated pipe ring stiffness can be tested using the method of test tube. First install the test tube on the fixing device, then apply the load, record the strain and ring strain of the test tube, and calculate the ring stiffness. The specific steps are as follows:

Install the test tube on the fixing device and fix it firmly. According to the actual needs, determine the length and diameter of the test tube. Install the test tube on a horizontal or inclined bracket to ensure that the test tube is balanced by force. Apply the load and record the strain and ring strain of the test tube. Calculate the ring stiffness, the formula is, where is the ring stiffness, is the deformation rate of the test tube, and is the diameter of the test tube.

2. Ring flexibility

The ring flexibility of a double-wall corrugated pipe refers to the ability of the pipe to maintain its structure from damage under a certain external force. It reflects the deformation resistance of the pipe, which is the performance of the pipe to restore its original state without cracking or structural separation when the deformation of the vertical outer diameter reaches a certain example (such as 30%) of the original outer diameter.

In the national standard GB/T 19472.1, the test requirement of ring flexibility is that the sample is unloaded when the deformation of the vertical outer diameter reaches 30% of the original outer diameter. Observe whether the sample can keep the inner wall smooth, whether it is bent in reverse, whether it is broken, and whether the two walls are disengaged. This performance is very important for the bending and extrusion of the double-wall corrugated pipe during operation and use, because it can ensure that the pipe can still work normally in complex environments.

According to the measurement results, the performance analysis and optimization of the double-wall corrugated pipe can be carried out.

AD HDPE double-wall corrugated pipe will be equipped with factory certificate. If you need technical inspection, you can go to a professional quality inspection unit for testing. Hubei AD Building Materials Co., Ltd.

Tel: 17399989993