1. Substandard Raw Materials: The quality of raw materials for pipelines directly impacts the efficiency of their later use.

2. Pipeline Aging and Corrosion: Extended installation periods, soil acidity and alkalinity, bacterial corrosion, and the presence of impurities in the water within the pipeline can alter the material characteristics of the pipeline sections.

3. Poor Planning and Design: During engineering and construction, the pipeline's crossing of floor slabs and the reserved hole sizes for building foundations do not comply with the design specifications, leading to potential pipeline displacement and bursting.

4. Geologic Impacts: Factors such as earthquakes, uneven soil settlement, and soil landslides can cause pipeline deformation, even damage.

5. Temperature Impact: Seasonal temperature variations cause uneven expansion and contraction of pipeline sections, leading to leaks. In the north, particularly in the northeastern region, significant temperature differences can cause pipeline compression, resulting in leaks at rigid joints or other vulnerable spots.