Pressure vessel is a closed device containing gas or liquid, which carries a certain pressure. Storage vessel, reaction vessel, heat exchanger and separation vessel are pressure vessels. Encouraged by the relevant national industrial policies, good industrial policy environment is conducive to the sustainable development of the future of the industry.
The technical level and the strength of the equipment manufacturing industry, directly influence and determine the competitiveness of its downstream industries and products, is an important embodiment of national comprehensive national strength. Throughout the world, the industrial powers, without exception, are the power of the equipment manufacturing industry. Benefit from the sustained and rapid development of China's national economy and the country's strong support, China's manufacturing power from manufacturing to manufacturing power has become an inevitable trend.
In the background of China's industrial equipment upgrading, an important application field of metallic pressure vessels such as the application of clean energy, new energy production, desalination equipment manufacturing was included in the "high tech industrialization key field guide current priority (2007 year)" and "Guiding Catalog of industrial structure adjustment (2005)". Bring development opportunities and huge market prospect of downstream industry upgrading will be made for metal pressure vessel industry.
In the introduction, absorption, digestion and innovation on the basis of the development of China's national conditions suitable for the new technology, new technology, training a large number of technical backbone and experienced managers, have the core competitiveness to expand domestic and foreign markets. Due to the impact of economic globalization and increasing labor costs, the focus of the world manufacturing industry is gradually shifting to the Asia Pacific region. As the most widely accepted and applied pressure vessel standard in the world, the United States ASME certification has been more and more widely used in our country.
According to the pressure vessel safety status, is divided into five levels. The level of safety status shall be assessed according to the test results, in which the lowest grade of the project shall be the assessment level.
Level 1: pressure vessel factory information, design, manufacturing quality compliance with the relevant laws and regulations and standards; in the design conditions can be used safely.
Level 2: the factory data basically complete; design and manufacture quality conforms to the relevant regulations and standards; according to the inspection report, there are some general defects without compromising safety, can not repair; in the regular inspection period regulations, can be safely used in the specified operating conditions.
Level 3: the factory data is not complete; the basic comply with the relevant regulations and standards of the main body material, strength, structure, some do not comply with the relevant regulations or standards of problems or defects, according to the inspection report, confirmed in the regular inspection period regulations, under defined operating conditions, can be used safely.
Level 4: the factory information is not complete; the main material is unknown or not in conformity with the relevant provisions; the structure and strength is not in conformity with the relevant regulations and standards; serious defects; according to the inspection report, confirm the inspection cycle regulations, need to monitor within the specified operating conditions.
Level 5: serious defects, difficult or can not be repaired, no repair value or after the repair is still difficult to ensure safe use; test report concluded as a waste.
Need to be explained: the security status of the defect, is the pressure vessel in the final state, such as the defect has been eliminated, then to eliminate the state, to determine the safety status of the pressure vessel level