What should be noted when welding PE pipes in summer?

1. Check whether all components of the welding machine are functioning properly, paying special attention to measuring the temperature of the heating plate before use to ensure it falls within the standard range (220℃ ± 10℃). 2. When adjusting the heating plate temperature, take into account the impact of ground temperature and ambient temperature on the actual temperature of the heating plate, and prevent the actual temperature of the heating plate (ground temperature + ambient temperature + displayed heating plate temperature) from exceeding 230℃. When the ambient temperature is above 38℃ and construction is carried out on asphalt roads, the heating plate temperature can be adjusted between 190℃ and 200℃; when the ambient temperature is below 38℃ and construction is performed in the field, the heating plate temperature can be adjusted between 200℃ and 210℃. 3. Before joining pipes, check the misalignment rate. The misalignment rate should not exceed 10% of the pipe wall thickness. If the misalignment rate exceeds 10% of the pipe wall thickness, the contact area at the weld joint will be smaller than the pipe wall thickness, thereby affecting the welding quality.

The difference between PE water supply pipes and PE drainage pipes

1. Pressure PE water supply pipes are used to deliver tap water, typically requiring water to be pumped from underground to the surface and into residential homes. Since PE water supply pipes must withstand pumping pressure, water supply pipes are generally classified into five pressure levels: 0.6 MPa, 0.8 MPa, 1.0 MPa, 1.25 MPa, and 1.6 MPa—corresponding to pressure ratings of 6 kg/cm², 8 kg/cm², 10 kg/cm², 12.5 kg/cm², and 16 kg/cm², respectively. The higher the pumping pressure, the higher the required pressure rating for the PE water supply pipe. Polyethylene drainage pipes are generally used to discharge wastewater and flow from top to bottom; therefore, polyethylene drainage pipes typically do not need to consider pressure ratings.

Things to Note During PE Drainage Pipe Installation

1. Before using and installing pipes: Carefully inspect the pipes for any damage incurred during loading, unloading, transportation, and stacking. If any defective pipes are found—such as cracks, breaks, or deformations—remove them promptly. 2. Connection between inspection wells and pipelines: It is recommended to use flexible joints sealed with flexible packing materials; the specific construction details should follow the design requirements. 3. When excavating trenches and preparing foundations, pay attention to the following: (1) The clear width at the bottom of the trench should be determined by adding 0.6 meters to the outer diameter of the pipe; (2) During trench excavation, adequate drainage measures must be implemented to prevent the trench bottom from being soaked by water.

PE pipe materials: High availability

PE pipes are aesthetically pleasing and hygienic, easy to install, safe and reliable, and offered at competitive prices. They are suitable for urban water supply pipelines, irrigation systems for landscaping, and applications in environments that require high-pressure resistance, making them the mainstream product in the water supply industry. Common markings on PE pipes include the nominal diameter, indicated by the letter ‘dn’, such as dn110 and dn315, which signify that the nominal diameters of these pipes are 110 mm and 315 mm, respectively. Some pipes also bear markings like de90 and de160, which indicate the pipe’s outer diameter. PE pipes: Aesthetically pleasing and hygienic, easy to install, safe and reliable The flexibility of PE pipes allows them to bend easily, enabling engineers to reroute pipelines around obstacles. In many situations, this flexibility reduces the need for pipe fittings and lowers installation costs.

PE pipes require no anti-corrosion treatment or maintenance.

E-pipe materials require no anti-corrosion treatment, are maintenance-free, and have a service life comparable to that of the building itself. This addresses the issues commonly found in traditional piping products—such as rapid corrosion, aging, frequent leaks, and poor hygiene—while effectively eliminating the costs associated with product maintenance and replacement. PE pipe materials require neither anti-corrosion treatment nor maintenance. PE pipe manufacturers point out that the expansion volume must exceed the storage volume required by the instantaneous flow rate of the lateral branch pipes. The discharge condition of the outlet pipe is primarily aimed at preventing burial, which could otherwise lead to a reduction in the overall drainage system’s flow rate. This requirement aligns closely with the rational planning of the entire project’s drainage system. PE pipelines offer a variety of construction techniques. In addition to the conventional open-cut method, they can also be installed using several innovative trenchless technologies, such as pipe jacking, directional drilling, lining, and split-tube methods. PE exhibits excellent resistance to most chemicals used in both domestic and industrial applications. However, certain types of chemicals can cause chemical corrosion—for example, corrosive oxidizers (such as concentrated nitric acid), aromatic hydrocarbons (such as xylene), and halogenated hydrocarbons (such as carbon tetrachloride).

What should be done if the wall thickness of PE pipe products from the manufacturer is uneven?

1. Check whether the temperature at the floor outlet is stable and feels neither too hot nor too cold; also verify that the water flow in and out is sufficient (especially for pipes where the flow distribution between the front and back sections is uneven). 2. Adjust the wall thickness on the mold and modify the gap size around the mold’s perimeter—keeping the gap consistent around small-diameter pipes, while ensuring it’s wider on the left and narrower on the right for large-diameter pipes. 3. Adjust the nozzle angles inside the vacuum shaping machine and the spray chamber to ensure uniform cooling of the pipe. 4. Adjust the water outlet of the sizing sleeve (groove and water holes) to ensure even water flow. 5. Adjust the diameter-to-wall-thickness ratio to minimize the impact of melt tension on the pipe wall thickness. 6. The PE pipe manufacturer should disassemble the mold, check whether any internal screws are loose, and retighten them if necessary.