PPR pipes and fittings are pipeline systems manufactured according to GB/T18742, with random copolymer polypropylene as the primary raw material. Polypropylene can be categorized into three types: PP-H (homopolymer polypropylene), PP-B (block copolymer polypropylene), and PP-R (random copolymer polypropylene). Due to its superior long-term resistance to hydrostatic pressure, long-term resistance to thermal and oxidative aging, and ease of processing and molding, PP-R has become the preferred material for producing polypropylene pipes designed to meet a 50-year service life for both cold and hot water applications.

PE ground-source heat pump-specific pipe materials: These are a new type of product made from high-quality polyethylene resin as the primary raw material, with the addition of necessary antioxidants and UV absorbers, and produced through extrusion processing. They operate at working pressures ranging from 1.0 MPa to 1.6 MPa and are suitable for use in ground-source heat pump systems. Principle of Operation: PE ground-source heat pump-specific pipe materials exhibit significantly higher tensile strength and greater pressure-bearing capacity compared to conventional PE water pipes. They have low thermal expansion under stress, excellent resistance to environmental stress cracking, good creep resistance, and outstanding toughness and flexibility. These pipes demonstrate strong adaptability to uneven foundations and displacement, and can withstand harsh environmental conditions such as earthquakes and typhoons. Special additives incorporated into the raw materials give these pipes superior weather resistance (including resistance to ultraviolet radiation) and long-term thermal stability compared to standard PE water pipes. They also feature strong corrosion resistance, eliminating the need for additional anti-corrosion treatments when used to convey corrosive media containing antifreeze agents, and boast an exceptionally long service life. With smooth inner walls, they offer low flow resistance and high hydraulic conductivity, thereby reducing construction costs. They also display excellent wear resistance and are highly resistant to abrasion. The thermal conductivity coefficient of PE ground-source heat pump-specific pipe materials is 0.41 W/m·K, ensuring that winter construction is not adversely affected. Electrofusion (or hot-melt) connections are convenient and reliable, making installation and maintenance simple and straightforward (without requiring water shut-off during the process). When used in conjunction with ground-source heat pumps, this system harnesses shallow geothermal resources found near the Earth's surface—typically within depths of less than 400 meters—as a source of cold and heat for energy conversion in heating and air-conditioning systems. These shallow geothermal resources can be referred to as "geothermal energy," which refers to the low-temperature thermal energy stored in soil, groundwater, rivers, or lakes, derived from absorbed solar and geothermal energy. This form of energy is considered a clean and renewable energy source.

Characteristics of corrugated pipes: Strong resistance to external pressure: The outer wall features a ring-shaped corrugated structure, significantly enhancing the pipe’s ring stiffness and thereby improving its ability to withstand soil loads. Performance aspects: Compared with other types of pipes, HDPE double-wall corrugated pipes offer distinct advantages. Due to their lightweight nature, these pipes are easy to handle and connect, making construction quick and maintenance straightforward. These advantages become even more pronounced under tight schedules and challenging construction conditions. When made from HDPE, double-wall corrugated pipes can convey larger flows than other pipes of the same diameter—meaning that, for the same flow rate requirement, pipes made from HDPE can have a smaller diameter. They also exhibit a low friction coefficient, allowing for greater flow rates. Additionally, they demonstrate excellent resistance to low temperatures and impact. The embrittlement temperature of HDPE double-wall corrugated pipes is -70°C. Under typical low-temperature conditions (above -30°C), no special protective measures are required during installation, making winter construction particularly convenient. Moreover, HDPE double-wall corrugated pipes possess outstanding impact resistance.

Product Introduction PE-RT underfloor heating pipe (heat-resistant polyethylene pipe for hot and cold water, abbreviated as PE-RT in English) is a non-crosslinked polyethylene material suitable for hot-water piping. It’s a new type of polyethylene product manufactured using a special molecular design and synthesis process. This material is a copolymer of ethylene and octene. In terms of molecular structure, its main chain consists of linear polyethylene, while shorter molecular chains of octene form its side branches. During the polymerization process, the number and distribution of these side branches on the polyethylene chains are carefully controlled, giving the material both heat resistance and excellent long-term resistance to static hydraulic pressure. Additionally, PE-RT boasts easy bendability without deformation or rebound, making it an ideal pipe material for underfloor heating systems.