Stress analysis of buried pipelines

It’s a random guess; there’s no unified method for calculation at all. Moreover, soil data is very difficult to obtain.

In principle, agreeing with the first floor option makes it very difficult to arrive at a correct and reasonable result. If calculation is indeed necessary, the main standards that can be referred to include the \"Code for Design of Gas Pipeline Engineering\" GB50251-2003; ASME B31.8 can also be used as a reference. The primary allowable stress equals the minimum yield strength of the material multiplied by a design factor (determined based on the regional classification), while the secondary allowable stress is ≤ the minimum yield strength of the material multiplied by 0.9. The formulas for calculation can be found in the \"Design Code for Gas Pipeline Engineering\", but for calculating long-distance buried pipelines, it is recommended to use software; I used CAESAR II for this purpose. Many boundary conditions need to be set based on experience, which makes it difficult to obtain accurate results.