The melting point of PVC (Polyvinyl Chloride) plastic pipe varies but generally falls within the range of 160°C to 210°C (320°F to 410°F). This variation depends on the specific formulation of the PVC material, including the addition of plasticizers, stabilizers, and fillers, which are used to modify the properties of the final product. Pure PVC has a melting point closer to the higher end of this range. It's crucial to keep PVC below its melting point during processing to prevent decomposition, which can release hazardous hydrochloric acid gas. In applications, understanding the thermal properties of PVC is essential for ensuring that it functions correctly under the expected temperature conditions, avoiding issues like deformity or loss of mechanical strength.

Liquid-Plumber is generally safe for PVC pipes when used according to the product instructions. PVC, a robust plastic used in plumbing, can resist the chemical action of drain cleaners like Liquid-Plumber. This cleaner is formulated to dissolve common clogs without damaging plumbing systems, including PVC pipes. However, excessive use or leaving the product in the pipes for longer than recommended can potentially cause damage over time. Manufacturers design these products to be as safe as possible for home plumbing systems, but user adherence to usage instructions is crucial. It’s always wise to use such chemicals sparingly and explore mechanical methods of clog removal, like plunging or using a plumber's snake, as a first line of defense.

Polypropylene copolymer (PPC) prices fluctuate based on several factors: oil prices, demand in sectors like automotive and packaging, and global supply chain dynamics. As of 2023, prices can range significantly, often seen per ton or kilogram in international markets. Factors such as innovations in recyclable materials and geopolitical events can also impact costs. Buyers should monitor global market trends, consider bulk purchasing, and explore sustainable alternatives to manage expenses. Negotiating contracts with suppliers that allow for price adjustments based on market fluctuations can also be beneficial. Stay informed with industry newsletters and reports for the latest price trends.