Pressure vessel common accidents are explosion, leakage, deflagration, fire, poisoning and equipment damage and other types.
Accidents cause casualties mainly due to explosion, deflagration, poisoning, fire, burns and so on. In addition, access to the inside of the pressure vessel during maintenance, but also prone to oxygen deprivation asphyxiation and poisoning.
In order to more effectively implement the scientific management and safety supervision, China's "pressure vessel safety supervision regulations" in accordance with the working pressure, medium hazards and their role in the production of pressure vessels are divided into three categories.
Expanded :
Pressure vessel internal and external inspection:
1, the pressure vessel internal and external inspection of this test must be in the parking and container internal cleaning can be carried out.
2, the main content of the inspection in addition to all the contents of the external inspection, but also to test the internal and external surface corrosion and wear phenomena; with the naked eye and magnifying glass on all the weld, head transition area and other stress concentration check for cracks, if necessary, the use of ultrasonic or ray detection to check the quality of the weld internal.
3, measuring wall thickness. If the measured wall thickness is less than the minimum wall thickness of the container, should be re-calibrated for strength, put forward the use of pressure reduction or repair measures; may cause metallurgical organization of metal materials changes in the container, if necessary, should be carried out metallurgical inspection; high pressure, ultra-high pressure container should be the use of the main bolts magnetic particle or coloring for the inspection of cracks and so on.
4, through the internal and external inspection, the inspection of defects to analyze the causes and put forward processing advice. Repair to be re-examined. Pressure vessel internal and external inspection cycle for every three years, but the strong corrosive media, toxic media container inspection cycle should be shortened. Found in the operation of serious defects in the container and welding quality is poor, the material of the medium of corrosion resistance of unknown containers should be shortened inspection cycle.
Baidu Encyclopedia - Pressure Vessels