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Pressure Vessels Have Been Widely Used
Jul 31, 2017

Pressure vessel is a gas-filled or liquid, used in industrial production to complete the reaction, heat transfer, separation, storage and other production processes, and has a specific function to withstand a certain pressure of the closed equipment. Pressure vessel manufacturing industry is an important branch of petrochemical general machinery manufacturing industry, is an important part of the equipment manufacturing industry.

Pressure vessels are basically working under pressure, and the medium is handled by high temperature or flammable and explosive, high risk, so the world will pressure containers as a special equipment to be mandatory management. The type and function of the pressure vessel also vary with the application. Pressure Vessel and Pressure Pipe Component The whole design, manufacture and use process involves metallurgical, structural design, machining, welding, heat treatment, nondestructive testing, automation and other professional and technical categories. Therefore, the development of pressure vessel technology is based on the comprehensive development of the professional and technical basis.

Development direction of pressure vessel body

With the international economic and technological exchanges between the growing trade and pressure vessel design, Pressure Vessel and Pressure Pipe Component manufacturing and use of the management of the maturity of the development of domestic and foreign pressure vessels gradually showing the following directions:

1, generalization and standardization

The generalization and standardization of pressure vessels has become one of the irreversible trends. This is because generalization and standardization mean that the interchangeability is improved, Pressure Vessel and Pressure Pipe Component which not only helps the pressure vessel to use the unit daily maintenance and logistical support, but also to minimize the design and manufacturing costs. At the same time, for exporting countries like us, standardization also means getting a pass to the international passport. From the practical analysis of the world's pressure vessel exporting countries, it can be seen that international engineering companies can lead to the development of international pressure vessel industry and the international recognition of standards, Pressure Vessel and Pressure Pipe Component so as to obtain greater international voice and rich economic profit The

2, specialization and specialization

Generalization and standardization Although there are many advantages, but in this type of pressure vessel can only be used in some common occasions, with special requirements in the working environment must use a special function of the pressure vessel. Such as nuclear reaction vessels, Pressure Vessel and Pressure Pipe Component crystal processing containers and rocket fuel tanks, etc. require the pressure vessel must have a strong corrosion resistance, high pressure and high temperature resistance. It is these special needs to promote the pressure vessel towards the specialization and specialization of the direction of continuous development and progress.

(1) ultra-high pressure vessel: it refers to the working pressure greater than or equal to 100MP containers, such containers in the polymerization of ethylene, artificial crystal manufacturing has been widely used. But it still exists the manufacturing cost is high and the security is not ideal. Pressure Vessel and Pressure Pipe Component Now with the emergence of new materials and metallurgical industry development of ultra-high pressure vessel pressure and strength limit is also gradually increased, which will promote the further development of ultra-high pressure vessels.

(2) high temperature pressure vessel: the so-called high temperature, usually refers to the wall temperature exceeds the container material creep starting temperature (for the general steel is about 350 ℃). Boiler drums for thermal power stations, coal conversion reactors, reactor pressure vessels for nuclear reactors in some reactor types (high temperature gas cooled reactors and proliferating reactors) are high temperature pressure vessels. High temperature pressure vessels due to the creep of the material will produce a slow change in shape and size. Pressure Vessel and Pressure Pipe Component Materials in the long-term role of high temperature, the lasting strength of the tensile strength is much lower. Therefore, the choice of materials is based on high temperature lasting strength and corrosion resistance. The stress analysis of the high temperature pressure vessel is complicated and the theoretical solution is very difficult. Modern practice shows that the use of finite element analysis is feasible. If the container is subjected to alternating loads (eg, repeated boost and buck), consideration should also be given to the interaction of fatigue (see fatigue strength design) and creep.

(3) resistant to strong corrosion pressure vessel: As the pressure vessel often with acid, alkali, salt and other corrosive media contact, corrosion not only cause material consumption, but also cause damage to equipment, raw materials and product loss, pollution of the environment, and even Resulting in poisoning, fire and explosion and other vicious accidents. Such as transport sulfuric acid, hydrochloric acid tank, not only to have a strong corrosion resistance, and its safety requirements are also very strict, this is not the general pressure vessel can meet.

(4) low-temperature pressure vessel: it is mainly used in liquid oxygen, liquid nitrogen and other media preparation, storage and low-temperature superconductor manufacturing process, because its working temperature is generally around -100 ℃ or even lower, then the material crystal The structure will change, resulting in material strength and plasticity decreased significantly, Pressure Vessel and Pressure Pipe Component to bring safe operation to the hidden dangers. This requires that such pressure vessels must be noted in the selection.

(5) In addition, there are containers such as large-scale and miniaturization and other special applications.