PE (polyethylene) material is widely used in the field of water supply pipe manufacturing due to its high strength, corrosion resistance, and non-toxicity. Because it will not rust, it is an ideal pipe to replace ordinary iron water supply pipes. pe pipe manufacturers introduced the national standards for PE water supply pipes: GB/T13663.1-2017, GB/T13663.2-2018 “Polyethylene (PE) Piping System for Water Supply Part 2: Pipes”.
The outer diameter series are 20, 25, 32, 40, 50, 63, 75, 90, 110, 125, 140, 160, 180, 200, 225, 250, 300, 315, 355, 400, 450, 500, 560, 630, 710, 800, 900, 1000, 1200, wall thickness is 0.63MPa, 0.8MPa, 1.0MPa, 1.25MPa, 1.6MPa. The general inner diameter series of pipe fittings is the same as the outer diameter series of pipes, and generally only produced to 315 caliber.
The low temperature embrittlement point of PE pipe is -70℃, which is better than other pipes. The ethylene content in PP-R pipe materials is mostly around 3%. However, the improved low temperature resistance of PP-R is still unsatisfactory. Its embrittlement point is about -15℃, which is much higher than the embrittlement point temperature of polyethylene pipe -70℃. Good-quality floor heating pipes have a smooth appearance without bumps, bubbles, obvious color difference and impurities, and the floor heating pipes indicate the type, specification and brand of the floor heating pipes.
The printing on a good floor heating pipe is clear and not easy to fall off. Use your hand to feel whether the pipe is furrowed or not. A good quality pipe feels fine and smooth to the touch, with moderate hardness. In order to ensure the reliability of the piping system, the floor heating pipes generally should not have joints. This requires the use of the entire pipe, and the pipe is required to be soft enough and easy to construct.
Compare the flexibility and wall thickness of floor heating pipes. Generally, the wall thickness of floor heating pipes is marked as 2.0, and some floor heating pipes are marked with a wall thickness of 2.0, but the wall thickness is actually not up to that, but the wall thickness of good quality floor heating pipes Thickness can meet the requirements and is consistent with the label. When you can’t distinguish the pipes by looking at them, you can compare the two pipes to see which one has the thicker wall.