In non-metallic piping applications, PP pipes and PPH pipes are commonly used. With a wide variety of plastic pipes available, consumers should note the following key points when selecting PP pipes, PPH pipes, and other plastic piping products:

1. Upon visual inspection, products with rough appearances, molding defects, uneven colors, impurities, and poor printing quality fail to meet the visual standards, which can negatively impact the consumer's perception. Moreover, the appearance reflects the inherent quality of the product; often, substandard appearance indicates poor internal quality as well, affecting usability. Poor printing quality can slightly affect aesthetics or, more severely, cause fading and contamination of other items.

2. The main reason for the off-odors in plastic products is the use of recycled materials and low-quality additives. The刺激性 odors emitted by such products can harm the respiratory system, and they should not be chosen.

3. Try it out! Some products are very colorful to attract consumers' attention. Poor-quality dark products may bleed pigment during use, which is usually industrial pigment. Consumers can check the quality of their chosen dark-colored products themselves: pour a little edible vinegar on a cotton ball, then rub it back and forth on the food surface 100 times. If the cotton ball stains, the product is不合格.