What are the basic requirements for steel used in pressure vessels? What principles should be followed when selecting steel materials?

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Basic requirements: Chemical composition – the chemical makeup of steel has a significant impact on its properties and heat treatment processes; Mechanical properties – these refer to the mechanical behavior of a material under various external loads in different environments; Manufacturability – the requirements regarding a material’s manufacturability are closely related to the structure of the container and its operating conditions. The following 6 principles should be followed: 1. Operating conditions of pressure vessels (design temperature, design pressure, properties of the medium, and operating characteristics, etc.); 2. Compatibility, which generally means that the material must be compatible with the medium it comes into contact with or with other materials; 3. Functions of the components and manufacturing processes; 4. Experience in using the material (historical data); 5. Overall cost-effectiveness, referring mainly to the performance-to-price ratio and the source of the material; 6. Standards and regulations. Compared to ordinary structural steel, steel used for pressure vessels has many specific requirements, and it must comply with relevant national standards and industry standards.