One. What is the maximum temperature that pph pipe can withstand?
PPH pipes exhibit good temperature resistance. Theoretically, PPH pipes can be used at 100°C, but it is recommended to use them at a maximum temperature of 90°C to maintain their pressure resistance. Corrosion resistance is generally not an issue. PPH pipes cannot be used to transport aromatic hydrocarbons and strong oxidizing agents. Other substances are generally acceptable.
Two. Which type of high-temperature plastic pipe is best?
1、PTFE pipe
Poly tetra fluoroethylene, commonly known as "plastic king," is a high polymer produced by polymerizing tetrafluoroethylene. It is a white, waxy, and translucent material with excellent heat and cold resistance, suitable for use at -180 to 260°C. This material exhibits resistance to acids, alkalis, and various organic solvents, and is virtually insoluble in all solvents. Furthermore, poly tetrafluoroethylene has excellent high-temperature resistance, extremely low friction coefficient, making it ideal not only as a lubricant but also as a cleaning agent for the inner surfaces of pipes.
PTFE pipes are stable at room temperature and pressure, avoiding moisture, heat, and high temperatures. They do not have a true melting point and begin to decompose slowly above 450℃, eventually turning into gas. Their mechanical strength suddenly disappears at 327℃.
2、PE-RT pipes
PE-RT stands for Polyethylene of Raised Temperature Resistance, which is the English abbreviation for this type of non-crosslinked polyethylene that can be used for hot water pipes. It is also known as "High-Temperature Non-Crosslinked Polyethylene" due to its non-crosslinked properties. Good-quality PERT II pipes can withstand temperatures from -70°C to 90°C.