Research Article
Failure Mode and the Prevention and Control Technology of Buried PE Pipeline in Service: State of the Art and Perspectives
Table 1
Comparisons of main performances between steel and PE pipes [
45,
46].
| Performances | Steel pipes | PE pipes |
| Mechanical properties | Poor ductility, toughness and resistance to fast crack transmission, poor seismic performance | Good ductility, toughness and resistance to fast crack transmission ability, good seismic performance |
| Anticorrosion performance | Risks of the corrosion protection and joint weld treatment in the humid environment | Excellent performance |
| Service life | Depend on anticorrosion | Easy to creep deformation |
| Fire hazard | Low (nonflame retardant material) | High (combustion-supporting material) |
| Construction technologies | Slow welding, large smoke, difficult transportation and lifting | Thermal fusion welding or electric fusion welding, fast construction speed, light material, easy transportation and lifting |
| Hydraulic interference | Rigid interfaces are affected | Rigid interfaces are affected |
| Thermal expansion and cold contraction | Need to design expansion joints | Need to design expansion joints |
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