Thanks to their excellent thermal insulation and corrosion resistance, insulated PPR pipes are widely used in various cold and hot water transport and heating systems. Their primary function is to minimize heat loss, prevent pipes from freezing and bursting, and improve energy efficiency. In the residential sector, they are commonly used for domestic hot and cold water piping, residential hot water circulation systems, and centralized heating in housing complexes-making them particularly well-suited for exposed (surface-mounted) installations where a stable hot water supply is required. Commercial and public facilities, such as hotels, hospitals, schools, and swimming pools, also rely heavily on insulated PPR pipes to ensure the energy-efficient operation of their centralized hot water systems. In industrial and municipal engineering, these pipes are used for thermal distribution networks, boiler piping, chilled water lines for central air conditioning, and the transport of chemical media; they also play a vital role in underground utility tunnels and urban or rural water supply and drainage projects. With the growing emphasis on environmental sustainability, they are increasingly being integrated into new energy systems, including air-source heat pumps, solar water heating, and waste heat recovery. Furthermore, they are frequently employed in specialized applications such as cold storage insulation, purified water production, and agricultural irrigation. In short, due to their durability and thermal insulation properties, insulated PPR pipes have become an essential piping solution across modern construction, industrial manufacturing, and energy-conservation sectors, providing a reliable infrastructure for the transport of various fluids.