Hubei rural coal-to-gas PE gas pipe | low temperature resistant, anti-settlement, safe and explosion-proof pipe

[Special requirements for gas pipes in Hubei rural coal-to-gas conditions]

Hubei rural area covers plains, hills, mountains and other landforms. The minimum temperature in winter can reach minus 3 ° C to 7 ° C, and the temperature in some high-altitude mountainous areas is even lower. In addition, the soil of rural homesteads is loose, and farming operations are prone to cause small surface subsidence. Traditional metal gas pipes are prone to corrosion, fracture, leakage and other problems, and cannot be adapted to complex rural gas use scenarios, which places higher requirements on the weather resistance and structural stability of pipes.

[Core performance advantages of PE gas pipe for rural working conditions]

The PE gas pipe specially adapted for gas transportation has outstanding advantages in the Hubei rural coal-to-gas project: excellent low temperature resistance, conventional products can maintain flexibility in a minus 20 ° C environment, and there will be no low-temperature brittle cracking problems; excellent anti-settlement performance, high elongation of pipe fracture, in case of small surface settlement and displacement, it can deform synchronously with the terrain, and there will be no broken pipe leakage points; safe and explosion-proof properties are stable, impact resistance and puncture resistance are strong, and there will be no pipe explosion problems under normal rated conveying pressure. The service life can reach 50 years, which is much higher than that of traditional metal pipes.

[Key points for selection and construction of PE gas pipe for rural coal-to-gas conversion]

In the selection stage, the pipes corresponding to the nominal pressure level should be selected according to the air supply pressure and laying scene of the village group, and the qualified products with uniform wall thickness and no burrs and cracks should be selected first. During the construction stage, the sharp gravel and hard objects in the pipe trench should be cleaned up, and the bottom of the trench should be smooth and tamped. The temperature and duration of the hot melt connection should be strictly controlled to ensure the sealing of the interface. When backfilling, the pipe body should be covered with fine soil above 30cm and then tamped layer by layer to avoid the direct rolling of heavy machinery and reduce the risk of later use.