Circuit design
Thread Content
When designing long-distance pipelines, you will encounter various terrains, and there are several common ways to deal with them! How to deal with it! What is the appropriate burial depth for pipelines?
Generally, it is divided into above ground laying, underground pipe trench and buried laying. Depth should be determined according to address and insulation requirements
1. Long-distance transmission is generally laid underground.； 2. Rivers can be crossed or crossed. Currently, crossing is not used much. The principle is that there is no need to cross places that can be crossed. ； For large rivers (Yangtze River, Han River, etc.), plans should be compared based on the actual conditions of the crossing points and the geological reports of the crossing points. Currently, tunnel crossings are the most common method. ； 3. The gullies are crossed or crossed. Large and medium-sized gullies are generally crossed. ； 4. In the past, the underground laying and climbing method was often used in steep mountains. Now, due to the emphasis on environmental assessment, mountain tunnels are generally used for large pipelines.
The burial depth can be found in Section 4.3 of GB50251-2003
Long-distance pipelines carry oil and gas, and the requirements may be different. High- and medium-pressure gas pipelines are generally laid underground, usually less than one meter. Special terrain requires deeper burial depth, and some need to be cased (such as over roads, railways, etc.).