The key points to restrict the reasonable new operation of pressure vessels are as follows

To ensure the correct implementation of Regulations 5 and 6, the state has formulated specific norms for the classification of toxic media, the toxicity hazards of chemical media, and the classification of explosion hazard levels. As long as they are correctly implemented, safety can be guaranteed. At present, the most difficult to handle in toxicity classification are chemical medium mixtures. Some components are extremely toxic, while others are just general gases. At this time, due to the different toxicity levels specified for the mixtures, there will be significant differences in container design classification and manufacturing requirements. Sometimes, excessive conservatism leads to waste, and sometimes the classification level is too low, which is not conducive to safety requirements. However, the National Labor Bureau, the safety authority in charge, has no clear statement on the toxicity of the mixture. GB150 stipulates that the toxicity of the mixture should be determined by the process personnel and the users. But often, these personnel cannot provide accurate answers either, which may potentially contain many unreasonable factors. At present, some domestic design units strictly stipulate that if the volume fraction of highly toxic media in a mixture is below a certain percentage, it may not be considered as highly toxic. Although this is not entirely reasonable, it has made clear regulations for design. Years of practice have proved that this is necessary.

In addition to accurately grasping parameters such as working pressure, temperature and medium characteristics, it is also necessary to have some understanding of the user's pressure vessel usage and management level, because the level of management directly affects the safe operation of pressure vessels. The management level of pressure vessel usage in some small-scale township enterprises and private enterprises is relatively low. Some of them are not even fully aware of the hazards of pressure vessels, and violations of regulations occur from time to time. Therefore, when determining the design parameters, designers should take these situations into account. When designing pressure vessels for such enterprises, the technical requirements should clearly define the limiting conditions to ensure the safe operation of the pressure vessels.

In conclusion, when determining design parameters, designers should carefully investigate the working pressure, working temperature and medium characteristics provided by the user. Based on understanding the user's management and usage level, and in combination with the actual situation, they should provide accurate and reliable design parameters to lay a solid foundation for the safe operation of pressure vessels.

Some pressure vessel accidents are caused by unreasonable structural design. GB150 provides some structural types, but they are only general and it is impossible to list all the specific structures required in various situations. This requires designers to fully exert their creativity and try their best to design pressure vessels with reasonable structures. A reasonable structure mainly refers to one that is easy to construct, has low residual stress after processing, a small stress concentration coefficient, and a reasonable stress distribution.