ABS water pipe Due to its advantages of high impact resistance, nanotechnology, smooth inner wall, non adsorption of oil dirt, honeycomb heart noise prevention, ABS special glue, and integration of pipes and pipe fittings after connection, as well as the use of zhuanli technology, it is loved by the general public Home piping Let's take a look at ABS Water pipe installation Precautions for construction.

1、 Pipe trench excavation

1. It is better to excavate the pipe trench in a straight line, and the excavation width of the trench bottom is DN+0.30m. When the pipeline is connected underground, the trench bottom width at the interface should be increased appropriately, and the width of the pipeline trench bottom should not be less than DN+0.50m, so as to facilitate installation and docking.

2. When the pipeline is buried, the depth of soil covering on the top of the small pipe shall meet the requirements:

3. When the pipe groove needs to turn, the turning angle should not be too large

4. During manual excavation of pipe trench, the trench bottom shall be flat and dense without sharp objects. The trench bottom can fluctuate, but it needs to support the pipes smoothly. If there is over excavation, it needs to be backfilled and compacted.

2、 Pipe connection

ABS pipe The connection includes hot-melt connection and electrofusion connection. The hot-melt connection can be divided into hot-melt socket connection and hot-melt butt connection. The electrofusion connection can be divided into electrofusion socket connection and electrofusion saddle type connection. We use the hot-melt butt connection method for construction. Its main steps are as follows:

1. Material preparation: place pipes or pipe fittings in a flat position on the docking machine, and leave 10-20mm cutting allowance.

2. Clamping: select the appropriate slip clamp according to the welded pipes and fittings to clamp the pipes and prepare for cutting.

3. Cutting: cut the impurities and oxide layer on the end face of the welded pipe section and pipe fitting to ensure that the two butt joint end faces are flat, smooth and free of impurities.

4. Alignment: the end faces of the two welded pipe sections should be fully aligned. The smaller the misalignment, the better. The misalignment should not exceed 10% of the wall thickness. Otherwise, the butt joint quality will be affected.

5. Heating: The butt joint temperature is generally between 210-230 ℃. The heating time of the heating plate is different in winter and summer, and the melting length of the two ends is 1-2mm.

6. Switching: remove the heating plate, quickly make the two hot melt end surfaces stick together and pressurize. In order to ensure the melting butt joint quality, the shorter the switching period, the better.

7. Fusion butt welding: it is the key of welding. The butt welding process should always be carried out under the melting pressure, and the curling width should be 2-4mm.

8. Cooling: keep the docking pressure unchanged, and let the interface cool slowly. The cooling time shall be subject to the hardness of the crimping by hand, and no heat can be felt.

9. Docking completed: after cooling, release the slips, remove the docking machine, and prepare the next interface connection again.

3、 Installation construction

1. Before installation, check whether the pipe groove meets the installation requirements, and then check whether there is obvious depression, crack, scratch and scratch on the appearance of the pipe, and replace it in time if there is any quality hazard.

2. C20 concrete shall be used to set concrete piers at pipe bends, tees, tapered joints, fire hydrants, etc., and the flange valves shall be reinforced with brick piers.

3. When ABS water pipes are connected with metal pipes, valves and fire hydrants, steel plastic transition joints or special flanges are required.

4. Exhaust valve shall be set at the pipeline bulge or uphill section to reduce the impact of mixed pressure of gas and water on the pipeline. The proportion of pipeline and exhaust valve is designed as 1:8.

5. Because ABS water pipe has good flexibility and flexibility Pipe installation The installation of expansion joints is not considered.

4、 Backfilling and compaction

After the installation and laying of pipes, the concealed works shall be backfilled immediately after acceptance.