Characteristics of PE water supply pipes:

Release Date:

2022-05-26

Author:

PE water supply pipes offer a long service life, are hygienic and environmentally friendly, are corrosion-resistant, provide excellent water flow, are highly flexible and easy to install, feature secure joints, are cost-effective, and have clearly defined dimensional specifications and outstanding physical and chemical properties. HDPE sewer pipes are suitable for municipal sewage projects and are gradually replacing traditional pipe materials. When purchasing, it is essential to select high-quality raw materials from reputable manufacturers and to verify their production credentials on site.

Characteristics of PE Water Supply Pipes:

1. Long service life: Under normal conditions, the service life can reach 50 years.

2. Good hygiene: PE pipes contain no heavy metal additives, do not accumulate scale and do not harbour bacteria, thereby significantly mitigating the problem of secondary contamination of drinking water. They comply with the safety assessment standard GB/T 17219 and the relevant health and safety assessment regulations of the Ministry of Health.

3. Resistance to corrosion from a wide range of chemical media: No electrochemical corrosion.

4. Smooth inner walls and low coefficient of friction, which improve the flow capacity of the medium and provide excellent wear resistance.

5. Good flexibility, high impact strength, and resistance to strong vibrations and twisting.

6. Lightweight, facilitating easy transport and installation.

7. Specialised electrofusion, butt fusion and socket fusion technologies ensure that joint strength is equivalent to that of the pipe body, guaranteeing the reliability of the joints.

8. The welding process is simple, installation is convenient, and the overall project cost is low.

9. PE water supply pipes with diameters ranging from DN20 to DN90 are blue; those with diameters of DN110 and above are blue or black with a blue stripe; other colours are available to order, and the colour of fittings corresponds to that of the pipes.

10. Low flow resistance: HDPE pipes have a smooth inner surface with a Manning coefficient of 0.009. The smooth surface and non-adhesive properties ensure that HDPE pipes have a higher conveyance capacity than traditional pipes, whilst also reducing pressure loss in the pipeline and energy consumption during water conveyance.

PE pipes for sewage discharge are also known as high-density polyethylene (HDPE) pipes. This type of pipe is commonly selected for municipal engineering projects, primarily in the wastewater treatment sector. Owing to their wear resistance, acid and corrosion resistance, high-temperature resistance and high-pressure resistance, they have gradually replaced traditional pipes such as steel and concrete pipes in the market. In particular, as these pipes are lightweight and easy to install and move, they represent a preferred choice of new-generation materials. When selecting pipes made from this material, users should pay particular attention to the following points:

1. Particular attention must be paid to the selection of raw materials for plastic pipes. There are thousands of grades of polyethylene raw material available; some on the market cost as little as a few thousand yuan per tonne. Products manufactured from such materials must not be used in construction, as this would result in significant losses due to rework.

2. Pipe manufacturers should be selected from reputable and professional producers.

3. When selecting and purchasing PE pipes, conduct an on-site inspection of the manufacturer to verify their production capacity.

Pipe Performance

1. Hydrostatic strength at 20°C (hoop stress 9.0 MPa, 100 hours): no rupture, no leakage

2. Hydrostatic strength at 80°C (hoop stress 4.6 MPa, 165 hours): no rupture, no leakage

3. Hydrostatic strength at 80°C (hoop stress 4.6 MPa, 165 hours): no rupture, no leakage

4. Elongation at break, %: ≥350

5. Oxidation induction time (200°C), min: ≥20

6. Longitudinal shrinkage (110°C), %: ≤3

7. Weather resistance¹) (Pipe material: cumulative static hydraulic strength at 80°C (hoop stress 4.6 MPa, 165 h) – no rupture or leakage; after ageing with an impact energy of ≥3.5 GJ/m, fracture elongation, % ≥350; oxidation induction time (200°C), min ≥10)

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