Table 7 Pipeline features
From: An information entropy-based risk assessment method for multiple-media gathering pipelines
Medium | Number | Service years (year) | Pipe material | Outer diameter (mm) | Wall thickness (mm) | Design pressure (MPa) | Operating pressure (MPa) | Description |
|---|---|---|---|---|---|---|---|---|
Thin oil | 18 | 5~20 | 20# | 159~273 | 3.5~13 | 2.5~6 | 0.7~3.5 | The soil along the pipeline is soft, making it difficult for vehicles to pass. Due to wind erosion, the content of the pipeline marker piles is blurred. The embankment along the pipeline is flush with the ground and cannot protect the pipeline. |
Heavy oil | 25 | 10~20 | 20# | 60~273 | 3.5~7 | 1.6~16 | 0.6~10.5 | There is a main traffic line near the pipeline, some marker piles along the line are inclined and collapsed, some pipe trenches are not backfilled, and large construction machinery is nearby. |
Gas | 18 | 10~20 | 20# | 114~508 | 5~27 | 1.6~32 | 0.~29 | Part of the pipeline through provincial roads, agricultural areas, a desert oasis ecological park, the railway, a parking lot, and some signs along with the pipeline collapse. |
Water | 12 | 5~25 | 20# | 159~219 | 5 | 1~20 | 0.~16 | Pipeline elbows are used to cross roads. There are marks of rolling over the pipeline, and the pipe dike is damaged. |
Steam | 8 | 10~20 | 20# | 114 | 10 | 14 | 3~13.5 | There is no internal anti-corrosion method for pipeline laying. The pipeline crosses the aisle, the traffic flow is large, the marking pile along the line is incomplete, and the marking content is unclear. The insulation layer of the pipeline has fallen off. |