Disadvantages and precautions of HDPE gas pipes in application

1 HDPE pipes have low mechanical strength and are easily damaged by human factors.

Because PE pipes are not as hard as steel pipes, they are easily punctured when impacted by hard objects. In order to protect PE pipes from human damage, red bricks and warning tapes are generally added above PE pipes when PE pipes are laid, and pipeline inspections are strengthened. When the gas PE pipe is constructed in advance or buried at a shallow depth, the gas PE pipe is easily drilled through during the construction of other supporting pipe networks or roads in the community, causing gas leakage. To avoid similar incidents, the gas PE that has been constructed should be monitored more closely or constructed after other supporting pipe networks, and sufficient burial depth should be ensured.

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2 HDPE pipes are more sensitive to thermal stability.

The compressive strength of PE pipes will decrease at higher temperatures; too low a temperature will cause them to become brittle. Therefore, the current PE pipe generally uses a pressure of 0.1 to 0.4 Mpa. Since PE pipes are easy to oxidize, bend, and are sensitive to temperature, there are certain requirements for the storage, handling, Transport, storage period, and construction of pipes. There are many PE pipe construction equipment and they are highly dependent on construction equipment; they have high requirements for the external environment, and it is inconvenient to construct in cold weather and windy and rainy environments, and protective measures must be taken.

3. HDPE pipes are not conductive

This brings great inconvenience to the detection and positioning of PE pipelines. In view of this, the completion data must be strictly reviewed in the project, and it is imperative to ensure that the drawings are consistent with the actual situation; after the pipeline is put into operation, if the construction near the pipeline changes, the original completion drawings must be updated in time to ensure that the exact information of the underground natural gas pipeline can be grasped in time, thereby laying a good foundation for the operation and management of the pipeline.

4. The matching problem of HDPE pipe fittings

Due to the limitation of the chemical properties of PE pipes, it cannot be used on the ground (it cannot be used as an open pipe), and the PE water well is large in size, which is inconvenient to construct in the community pipe network matching. PE pipe fittings are expensive.

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