Welding and Laying of PE Pipe in AD

PE pipe welding is the most important part of the whole construction process, so in the construction process, it must be checked step by step to strictly control the construction quality. Welding and laying of PE pipes, AD pipe manufacturers contact number 17399989993.

1. Prepare 1 before welding, clean the oil circuit joints, and correctly connect the various components of the welding machine.

2, check the power supply voltage to ensure that the voltage meets the requirements of the welding machine.

3, check and clean the heating plate.

4, set the technical parameters (such as the set temperature of the heating plate, etc.) correctly according to the welding process.

2. Pipe welding construction steps 1. Pipe clamping is in place and the port is cleaned to remove residual moisture and soil and other debris.

2, pipe milling and correction to ensure that the site is clean and barrier-free. After milling, do not directly touch the milled port with your hands to avoid contamination. And correct the pipe port. Avoid the tilt of the milling surface heating is not in place (generally after adjustment, the end face of the pipe should be milled again to ensure that the pipe port is flush).

3, pipe heating, the heating plate is placed in the middle of the two pipe ports to heat the pipe. When the temperature of the heating plate reaches 210 ° C~ 230 ° C (remember not to drag the heating plate when heating), the heating time is satisfied (the two ports are fully melted), quickly extract the heating plate, and quickly connect the melted two ports (to avoid heat loss and pollution of the port surface after being placed for too long, which will affect the welding quality). After docking, ensure that the docking pressure is constant.

4, in the crimping stage, the pipe port is quickly pressurized and docked after heating through the port, until the flanging is rolled over to the outer wall of the pipe (no pressure relief at this time).

5, in the cooling stage, the welding port needs to be naturally cooled for 5 to 10 minutes after the welding is completed (this time cannot be cooled by cold water pouring or other physical cooling). Remove the welding machine after the pipe welding port is fully cooled to ensure the welding quality.

Third, the water injection pressure test of the pipeline Before the water injection pressure test, the pipeline should be tamped with backfill soil to cover 50 cm (the interface of the pipeline is not covered, so as to check the leakage at the interface), so as to avoid accidents during water injection pressure. According to the plastic pipe water injection pressure test specification: the test pressure is 1.5 times the design working pressure and not less than 0.8 MPa, the water injection test pressure value of the water supply pipeline of the project is selected, the length of the test section is about 1 000 m, and there must be no gate valves and exhaust valves on the test section pipeline that are prone to pressure relief.

four, the trench backfill pipe sides of the earth filling using artificial or vertical electric tamping symmetrical, the top of the pipe within 50 cm of the earthwork backfill method and backfill method on both sides of the pipe is the same, backfill soil material shall not contain a particle size greater than 40 mm of stone and hard soil, so as not to damage the pipeline in the filling process, the top of the pipe 50 cm above the use of breastwork electric tamping according to the design of compaction layered (each layer of tamping thickness does not exceed 20 cm) tamping fill to the ground elevation consistent.

AD pe pipe welding and laying, AD pipe manufacturers contact number 17399989993