HDPE double-wall corrugated pipe has been widely used in municipal drainage, sewage discharge and farmland irrigation due to its advantages of strong corrosion resistance, smooth inner wall and low water flow resistance. For HDPE double-wall corrugated pipe, in order to ensure that its quality meets the requirements of use, standardized sampling is the key first step. So, how to sample HDPE double-wall corrugated pipe? The following is a detailed introduction.

1. Standard specification for sampling

The sampling of HDPE double-wall corrugated pipe is mainly based on relevant national standards and industry norms, such as "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering". These standards specify the number, method and inspection items of pipe sampling, the purpose of which is to ensure the quality of the pipe in an all-round way, and to ensure the smooth development and safe operation of the follow-up project. Taking Hubei AD Building Materials Co., Ltd. as an example, as a professional pipe manufacturer, in the production of AD PE double-wall corrugated pipes, strictly follow these standards and specifications, and control the quality of the product from the source. Its contact number is 17399989993, which is convenient for customers to consult product-related information.

2. Sampling of physical properties and mechanical properties testing

The principle of whole pipe priority: When conducting physical properties and mechanical properties testing, the ideal state is to extract the whole pipe as a sample as much as possible. Because the whole pipe can most truly reflect the state of the product in actual use, to ensure the accuracy and representativeness of the test results. However, in actual operation, the whole pipe is often too long, which brings great inconvenience to transportation and testing.

sample interception according to the standard: when the whole pipe is not easy to operate, it can be intercepted according to the length specified in the standard. However, the interception process must ensure that the intercepted sample can meet the test requirements. For example, for the ring stiffness test, which is an important indicator of the resistance of HDPE double-wall corrugated pipe to external pressure, the sample length is generally not less than 300mm. Only by meeting this length standard can the test process accurately simulate the pressure of the pipe in actual use, and then obtain a reliable ring stiffness value.

Sample appearance inspection: Whether the whole pipe is selected or part of the sample is intercepted, the appearance of the pipe should be carefully checked. The inner and outer walls of the pipe are not allowed to have bubbles, depressions, obvious impurities and irregular ripples. The two ends of the pipe should be flat, perpendicular to the axis and in the trough area. The inner and outer walls of the trough area should be tightly welded and not disengaged. Once the sample is found to have appearance defects, it should be replaced in time to avoid affecting the test results.

3. Sampling Considerations for Other Performance Tests

In addition to physical and mechanical properties tests, HDPE double-wall corrugated pipes may also need to be tested for weather resistance and chemical stability. When conducting weather resistance tests, it is necessary to simulate the impact of different climatic conditions on the pipe. Sampling should consider pipes of different production batches and different production dates to comprehensively evaluate the performance stability of the pipe in the face of various climatic factors during long-term use. For chemical stability testing, to detect the resistance of pipes to common soil and water chemicals, sampling should be based on the expected use environment of the pipes, and targeted samples should be selected. For example, for pipe samples used in industrial wastewater discharge areas, it is necessary to focus on testing their tolerance to chemical substances that may be contained in industrial wastewater.

The sampling of HDPE double-wall corrugated pipes is crucial and needs to be carried out in strict accordance with relevant standards. Whether it is physical properties, mechanical properties testing, or other performance testing sampling, it is necessary to comprehensively consider all aspects to ensure that the samples can accurately reflect the quality of the whole batch of products and provide reliable pipe quality assurance for engineering construction. HDPE double-wall corrugated pipe manufacturers such as Hubei Au Yuan Building Materials Co., Ltd., only by continuing to strictly control the product quality, can they gain a foothold in the market competition and provide high-quality HDPE double-wall corrugated pipe products for various projects.