The HDPE pipes, made from pure new material, boast a smooth surface, even coloration, no dents or burn spots, uniform wall thickness, and a smooth, delicate interior with no odors.
A. Feel: Is the texture smooth? Are the particles even? Feel the material; if the inner wall of the pipe is rough, it indicates a higher presence of waste material or poor quality waste.
B. Odor: No smell or peculiar smell. Good HDPE piping has no odor, while poor quality piping may have an unpleasant scent.
C. Compression: HDPE pipes with adequate hardness should not easily deform under pressure; if they do, they are not good quality HDPE pipes.
D. Crushing: Good HDPE pipes have good "resilience" and are not easily crushed. Simply being unable to crush a pipe does not make it high-quality HDPE. However, hardness does not equate to resilience. For HDPE pipes that are impossible to crush, we must raise doubts. Some unscrupulous manufacturers add calcium carbonate and other impurities to increase the hardness of the pipes, which can easily lead to cracking over time.
E. Burn: Burning is a straightforward and effective method. HDPE pipe materials are originally mixed with recycled plastics and other impurities.HDPE pipingBlack smoke and a nose-tingling odor; good pipe material, when burned, does not produce black smoke or odor. After combustion, the melted liquid remains clean. Additionally, after burning, pull a thread to inspect it. If the thread is long and thin, the tensile strength of the pipe material is not high; conversely, it is good.
F. Look: Good pipe material has even wall thickness, a smooth surface, no color spots, bubbles, burn spots, or unevenness. The inner wall is smooth without any indentations or protrusions.
