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Hdpe drain installation requirements

Hdpe drain installation requirements:
1. Before the construction, the pipe, pipe fittings to do the second appearance inspection, found that problems can not be used.
2. Because of its light weight, in the installation process can be moved manually, generally do not need to use machinery, which in the release of the groove, not with the ditch wall and ditch bottom collision.
3. When installing the valve and fittings of the flange interface, take measures to prevent the external tensile stress, the diameter of more than 100mm under the valve, should be brick support pier.
4. In the hdpe drainage pipe through the railway, highway and other obstacles, should be set to protect the pipe to play a role.
5. When the pipe installation and laying works are interrupted, apply the plug or other cover to close the nozzle and prevent the debris from entering the pipe.
6. When welding pipe fittings, should be welded pipe size matching the heating head fitted to the welding machine, connected to the power supply, waiting for the heating head to achieve the best temperature of 260 ℃, while the pipe, pipe into the fuse, according to the specified time After heating, after heating, remove the pipe and pipe fittings, connect immediately, in the pipe and pipe fittings matching, if the two position is not right, you can make a small amount of adjustment within a certain period of time, but the reverse angle should not exceed 5 degrees.
Should pay attention to several questions:
1. Pipeline laying should try to avoid crossing the corrosion, pollution pipeline lots, must be set through the casing.
2. When the rainy season or high groundwater level construction, to prevent the pipeline floating.
3. Trench backfill should be tamped, if the pipeline through the road, in order to avoid crushing the body, all the back in the pipe back to the coarse sand.
4. Pipe has good toughness and softness, in the installation, to make full use of this laying, the general large diameter pipe bending radius R should be greater than 30D, but not in the bending parts of the installation of pipe fittings, valves, water meters and other accessories The
5. Construction process, should promptly clean the pipe and pipe fittings welding parts, to avoid water, sand, dust and other contact with the hot melt caused by bonding is not strong; also use a pencil on the pipe marked hot melt depth.
6. As with other plastic pipes, hdpe drainage pipe should be exposed to direct ultraviolet radiation.

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