Technical conditions of pressure vessels

1) The usage conditions are relatively strict. Pressure vessels not only bear pressure loads of different sizes (pulsating loads under normal circumstances) and other loads, but some also operate under high temperature or cryogenic conditions. The working medium is often corrosive and the working environment is relatively complex. extreme.
2) Easy to overload. The pressure inside the pressure vessel often rises rapidly due to operating errors or abnormal reactions, and the vessel often ruptures without being noticed.

3) Some stresses are very complex. For example, fatigue cracks will always be caused by excessive local stress and continuous loading and unloading around the holes of pressure vessels and other structural discontinuities.

4) Serious shortcomings are often hidden. Electrically welded or forged containers will always have minor cracks and other serious defects during manufacturing. These defects will occur if these defects develop during operation or under moderate conditions (such as operating temperature, working medium characteristics, etc.) Will cause the container to burst suddenly.