Recently, the Market Supervision Administration of Liaocheng City, Shandong Province, published the results of its 2025 municipal-level random inspection on the product quality of random copolymer polypropylene (PP-R) pipes.
In accordance with laws and regulations, including the "Product Quality Law of the People's Republic of China" and the "Interim Measures for the Administration of Product Quality Supervision and Random Inspection," as well as the city's product quality supervision and sampling plan and implementation rules, the bureau organized and conducted the random inspection on the quality of PP-R pipes within Liaocheng City. The sampling inspection was conducted based on the standard GB/T 18742.2-2017 "Polypropylene piping systems for hot and cold water installations — Part 2: Pipes." The inspection items primarily included dimensional specifications, longitudinal reversion, Charpy impact test, hydrostatic pressure test, ash content, and melting temperature. A total of 14 batches of random copolymer polypropylene (PP-R) pipe products were sampled and inspected, all of which passed the tests and were deemed qualified. A list of enterprises that were not sampled is also provided.
Popular science knowledge and consumer tips for the product: Random copolymer polypropylene pipe, abbreviated as PP-R pipe, is currently the most widely used water supply pipeline in home decoration, offering advantages such as energy and material savings, environmental friendliness, corrosion resistance, smooth inner walls that resist scaling, ease of maintenance and construction, and a long service life, making it widely applicable in building water supply and drainage, as well as urban and rural water systems. When purchasing, it is recommended to: 1. Feel the texture to see if it is fine and if the particles are uniform; rough particles likely indicate the incorporation of other impurities. 2. Smell for any odor; PP-R pipes are primarily made from polypropylene, so good quality pipes are odorless, while inferior ones may have a strange smell, likely due to the addition of polyethylene. 3. Good PP-R pipes have good "resilience"; pipes that shatter too easily are naturally not of good quality. However, high hardness does not equate to good elasticity; consumers should be skeptical of PP-R pipes that cannot be smashed at all, as some unscrupulous manufacturers may add excessive impurities like calcium carbonate to increase hardness, making such pipes prone to brittle fracture over time. 4. You can request to see the inspection report for the sales product; the testing unit should be a professional organization, the test items should correspond with the standards for PP-R pipes, and the testing standards cited should be currently effective national standards.
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