How deep are water supply pipes buried
The buried depth of water supply pipes is generally between 0.8 and 1.2 meters, and can be appropriately increased to 1.5 meters in extremely cold areas. The deeper the pipe is buried, the less ground load pressure the pipe is subjected to, but the more difficult the construction is. If the buried depth is too shallow, it will affect the service life due to external interference, and if it is too deep, it is easy to cause construction quality problems. Therefore, the appropriate buried depth of water supply pipes needs to be determined based on the pipe diameter, geological conditions and water supply pressure.
Key points of water supply pipe construction
During the construction of water supply pipelines, special attention should be paid to support and sealing. The function of support is to prevent the deformation of the pipe body, and sand or supports are generally used; sealing mainly prevents the pipe body from being affected by immersion, and canvas and old paraffin are often used to wrap the pipe body. Construction personnel also need to pay attention to pipe body damage, joint connection quality, backfill soil quality, etc. to ensure the safety and reliability of the pipeline.
Water supply pipe storage also needs to pay attended to avoid pipe body damage and deterioration. A similar construction protection method is often used to seal at both ends and wrap the entire pipe section. The storage environment should be free of corrosive substances and the temperature should be moderate. The storage methods and deadlines of different pipes are also different, such as the storage of steel pipes and PE pipes. Storing for too long may affect the performance of the pipes, so it is best to inspect them before use.
Common materials for water supply pipes include steel pipes, cast iron pipes, PE pipes (high-density polyethylene pipes), PVC pipes (polyvinyl chloride pipes), etc. Steel pipes and cast iron pipes are mainly used for industrial and urban water supply, while PE pipes and PVC pipes are used for domestic and rural drinking water. PE pipes are favored for their corrosion resistance and ease of construction. The selection of pipes also needs to be comprehensively judged based on the chemical properties of the conveying medium, water supply pressure and temperature.
As an important part of the urban and rural water supply network, the burial depth, construction, storage and material selection of water supply pipes need to be taken seriously. Reasonable pipeline design and high-quality construction can maximize the performance of pipes and ensure the safe supply of water sources. On the contrary, if there are problems in the above aspects, not only the service life will be shortened, but also the water quality safety and water supply reliability may be threatened.
PE water supply pipe construction specifications
PE water supply pipe construction has strict specifications, which are directly related to the service life safety and reliability of the pipe network. The main construction specifications are as follows:
1. The connection of PE pipe sections generally adopts the hot melt adhesive method, which requires professional Pipe Welding machines and skilled operators. The temperature of the weld body is controlled at 210-230°C, and the pipe section must be completely softened and bonded evenly during welding. After welding, there must be enough low-temperature strengthening time to quickly cool it down to below 100°C.
2. Before the pipe section is buried in the soil, the pipe section and the pipe wall must be completely wrapped tightly to prevent direct contact with the soil. Commonly used wrapping materials are clay, canvas and old paraffin. The wrapping should be uniform and thick, especially at the joints and elbows.
3. Before the PE pipe is buried in the soil, there must be a certain thickness of sand support at the bottom, such as 20-30cm. This can effectively prevent the deformation of the pipe body. The backfill soil also needs to be compacted in layers and avoid direct contact with the pipe body.
4. PE pipes are more likely to deform under stress at elbows or crossings, which requires strengthening support to prevent pipe damage. It is often reinforced by wrapping steel brackets or cement supports.
5. PE pipes in trenches or culverts must also be properly supported, such as setting a support every 3-5 meters to prevent the pipe body from deforming due to buoyancy. The support should be bonded or tied to the surface of the pipe body.
6. Gravel or hard objects in the backfill soil of PE pipes should avoid direct contact with the pipe body. This may cause scratches and damage to the surface of the pipe body. The backfill process should be operated carefully and compacted in layers.
7. After the PE pipe is connected, a water pressure test should be carried out to ensure that the welding and connection lines are completely sealed and leak-free. The static pressure test pressure is not less than 1.5 times the working pressure of the pipeline network.
Strictly following the above PE pipe construction specifications can maximize the quality of pipeline construction, give full play to the excellent insulation and corrosion resistance of PE pipes, extend the service life of the pipeline network, and ensure the safety of water supply.
