What is the main difference between the conventional design method and the analytical design method of pressure vessels?

The main difference between conventional design method and analytical design method of pressure vessel lies in the basis and process of design.

The conventional design method is to determine the best structural form and proportion according to the geometric shape, strength theory and the requirements in the actual production and installation process, and then verify and optimize it through calculation, simulation and experiment. Conventional design methods pay more attention to engineering practice and experience summary, and the design process is relatively simple, easy to realize, and has the characteristics of strong manufacturability and convenient mass production.

The analytical design method is a calculation model based on the principles of mathematics and mechanics. Considering the internal pressure, temperature, load and other factors of the pressure vessel, it theoretically analyzes and predicts the stress, deformation and other properties of the vessel, so as to avoid or reduce the safety problems of the vessel in use. The analysis and design method is complex and time-consuming, but it can understand the stress and deformation of the container more thoroughly and provide a reliable basis for the safe operation of the container.

Generally speaking, conventional design methods pay more attention to practicality and experience exploration, and the design results focus on actual operation and production. The analysis and design method pays attention to theoretical research and calculation, and to optimizing the structure and performance of the container, which is more reliable in engineering. The difference is obvious, and which design method to choose depends on the specific situation and the focus of demand.

Overview and importance of pressure vessels;

1. A pressure vessel is a device that can bear internal and external pressures and can contain or store liquids, gases, liquefied gases, reactants and reaction products. According to different applications and requirements, pressure vessels can adopt different materials and manufacturing processes, such as steel, alloy and composite materials. Pressure vessels are widely used in petrochemical, metallurgical, chemical, pharmaceutical, aerospace, food and other industries.

2. The design and manufacture of pressure vessels must conform to relevant standards and specifications, such as ASME standard, PED standard and GB standard. To ensure the safety and service performance of the ship. Usually, the inspection of pressure vessels includes appearance inspection, dimension measurement, damage detection, air tightness inspection, water pressure test, ultrasonic flaw detection, magnetic particle flaw detection and so on. In the process of use, pressure vessels need regular inspection and maintenance.

3. The design of pressure vessel mainly considers the following factors: the specification, shape and material of the vessel; Working conditions and use environment of the container; Hydrodynamic calculation and safety check of containers; Sewage treatment and waste gas treatment of container system; Cost and reliability of containers, etc. At the same time, comprehensive and scientific design should be carried out in combination with the requirements of relevant laws and standards to ensure the safe and reliable operation of containers.

Application, safety, standards, inspection and maintenance of pressure vessels

Application: Pressure vessels are widely used in chemical industry, petroleum, natural gas, nuclear industry, water treatment, shipbuilding, rockets, airplanes, automobiles, medicine, food and other industries. Common pressure vessels include boilers, gasholders, storage tanks, reaction vessels, heat exchangers, condensers, separators, etc.

2. Potential safety hazard: As the medium inside the pressure vessel is under high pressure, once the vessel leaks, breaks or explodes, it will cause serious harm to people and property. Therefore, in the process of design and use, we must pay attention to the safety of containers and take corresponding measures to prevent and control them.

3. Design and manufacturing standards: The design and manufacturing of pressure vessels must conform to relevant domestic and international standards, such as Code for Design of Pressure Vessels, ASME standards, PED standards and GB standards. Failure to design and manufacture pressure vessels according to standards will cause unpredictable safety risks.

4. Inspection and maintenance: Pressure vessels need to be inspected and maintained regularly during use to ensure their safe and reliable operation. The inspection contents include air tightness inspection, water pressure test, ultrasonic flaw detection and magnetic particle flaw detection. At the same time, the container should be maintained regularly to prolong its service life and ensure its performance.