Currently, cheap PE pipes on the market are priced even lower than the cost of PE raw materials. PE pipes made from these materials fail to meet national standards, causing serious damage to users and projects. The most serious issues include: 1. Inadequate oxidation induction time, directly impacting pipe lifespan. Pipes age rapidly, failing to meet the minimum 50-year service life requirement. 2. Decreased weather resistance. 3. Long-term...Hydrostatic strength and resistance to slow crack growth will both decrease, and carbon black distribution will be uneven. These factors will affect the product's service life and pose potential safety hazards." Are consumers confused about how to choose PE pipes? Below, we will further explain how to judge the quality of pipes through two experiments that determine the most important indicators of PE pipes (oxidation induction test and elongation at break). 1. Oxidation Induction Test (According to national standards, the oxidation induction time should be greater than or equal to 2...)0 minutes is considered合格 (qualified)." Test Objective: Oxidation induction time is an important indicator of the thermal stability of pipe materials. Its length is closely related to the long-term heat aging resistance of PE pipes. Measuring the oxidation induction time of pipes ensures that the pipes still meet usage requirements during construction, welding, and a 50-year service life. PE pipes produced from substandard materials have unstable quality and are extremely prone to aging, resulting in low performance indicators. Pipeline projects using such products will frequently experience pipe breaks and leaks, leading to numerous customer complaints.Survival, causing varying degrees of damage to the project, and also causing great trouble for users. 2. Elongation at Break Test Test Objective: Elongation at break is one of the indicators of good flexibility of pipe materials. By measuring the elongation at break of the pipe material, we can ensure the pipe material's adaptability to uneven foundation settlement and meet the requirements of seismic performance. National Standard Requirements: Elongation at break ≥ 350%. When the pipe material is actually tested for elongation at break, it should not break when reaching the maximum range of the equipment.The extensometer displacement was 350mm. This means the sample was stretched 350mm without breaking, indicating an elongation of 700%. This demonstrates that the pipe's elongation at break is greater than 700%, far exceeding the national standard requirements." The standard stipulates that PE pipes should use raw materials produced by Sinopec. For water supply pipes, the raw materials used must strictly comply with the national standard GB/T13663-2000, which specifies a mixture of raw materials or natural color material + masterbatch. For gas pipes, the raw materials used must strictly comply with the national standard GB15558.1-2003, which specifies a mixture of raw materials. No other residual materials are added to any of the products.Fill material.