2018 Advanced Professional Title Defense Questions
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Defense topics for pipeline-related aspects in chemical equipment design in 2018: 1. What factors are considered in pressure test calculations? Under what circumstances is a pneumatic test used? 2. The differences between GB flange standards and HG flange standards. 3. Differences between China’s and the United States’ pressure pipeline systems, as well as the U.S. pressure pipeline standards. 4. Precautions for designing liquid oxygen pipelines. Everyone is welcome to discuss these topics; thank you!
What factors are taken into account in the calculations for pressure tests? When is a pneumatic test used? Design temperature, design pressure, material properties – P_test = 1.5 * P_design * σ_ring / σ_design, where σ_design is a function of the material and temperature. This is something that anyone involved in pressure pipeline design should know. Generally, a pneumatic test can be carried out only when the design pressure is below 0.6 Mpa. Situations where a hydraulic test cannot be carried out in terms of process considerations.