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Pressure Vessels Require Scientific Maintenance
May 18, 2017

Pressure vessel is a gas-filled or liquid, carrying a certain pressure of the closed equipment. According to different classification methods can be a variety of classification of containers, including by the use of pressure and temperature levels, Pressure Vessel and Pressure Pipe Component dressing media, the use of location and mode of movement and other aspects of classification. Containers in industrial production is more commonly used equipment, but also endanger the safety of life, the greater the risk of special equipment. Working pressure can be up to 100MPa or more (such as ultra-high pressure vessel). Whether the container in the use of safety, you need to rely on scientific maintenance and reasonable maintenance to ensure that, and thus extend the life of the container.

Pressure vessel maintenance, transformation standards

Only with the corresponding qualifications of enterprises or units can be carried out on the maintenance and transformation of containers, and through the corresponding inspection and testing organizations in accordance with the requirements of safety technical supervision and inspection of qualified, without supervision and inspection of qualified delivery. Before repairing and transforming the container, it shall carefully examine the nature, defects, characteristics, scope and causes of the necessary repair and alteration parts, and obtain the requirements of the corresponding qualified design unit to meet Pressure Vessel and Pressure Pipe Component the requirements of the existing norms and standards. The location of special equipment safety supervision and management and inspection agencies for the relevant procedures before the implementation of maintenance, transformation. The maintenance of the pressure vessel referred to in this document refers to the major maintenance (hereinafter referred to as maintenance), which is defined as the replacement of the main compression element, orthopedic, digging, longitudinal joints of the welded container barrel, cylinder and cylinder section (head) Connection of the ring joints, the head of the splicing joints, spherical shell between the welding joint maintenance. Modification refers to changing the structure of the main pressure of Pressure Vessel and Pressure Pipe Component the original or change the pressure vessel operating parameters, dressing media, use and so on.

Classification of container maintenance

Pressure vessels are classified by system

2.1.1 post-maintenance. Post-processing refers to the failure of the container itself or the use of time is too long to cause serious performance of the aging, so that the container local damage, defects, leakage and so the production can not be normal, only emergency shutdown repair. This maintenance method has a great risk, the process is more complex.

2.1.2 Check after repair. Inspection and maintenance is usually in the process of operation of the container, the operation Pressure Vessel and Pressure Pipe Component or maintenance personnel found that the container can not determine the situation, take the way parking maintenance. This type of maintenance for the operation or maintenance personnel operating skills and sense of responsibility have a higher demand. Usually in the maintenance of the container is not the best way.

Maintenance of pressure vessels

In the use of qualified units and individuals to operate the container, the need for the following parts of the maintenance of the corresponding parts to be concerned about the timely maintenance.

To ensure that the coating is intact

For corrosive dressing media, often in the container plating plating, such as painting, plating and increase the lining and other methods. If the coating is damaged, the media will directly damage the container wall at the breakage, thereby shortening the service life of the container and even causing damage to the equipment to cause a safety accident. In order to ensure that the coating is in good condition, to regularly check whether the anti-coating rub, impact caused by the fall, Pressure Vessel and Pressure Pipe Component lining or weld cracks and so on. If found to be damaged after the coating, it is necessary to find qualified professionals to repair in order to continue to use. The outer layer of the container corrosion and insulation should also be given enough attention, such as corrosion and humidity in the outer wall of the container damage, the container insulation layer damage directly affect its safe operation.

Remove chemical corrosion factors

For some of the media under certain conditions will have a corrosive effect on the container, as far as possible to completely remove the corrosion caused by this reason. For example, when the container is in oxygen or in the process of making or extracting, water is often carried into the container, and the water vapor is saturated and condensed to precipitate, and finally accumulates at the bottom of the container, resulting in accelerated corrosion of the container at the junction of water and oxygen. In order to prevent the occurrence of such things, it is best to oxygen in addition to Pressure Vessel and Pressure Pipe Component water treatment, so that oxygen can be kept dry into the container

Maintenance during deactivation

The containers that are in the period of deactivation should also be necessary for enhanced maintenance. Facts have proved that the maintenance of the container during the suspension, will cause a lot of accidents. In a certain sense, in the Pressure Vessel and Pressure Pipe Component absence of scientific and reasonable maintenance and maintenance of its damage rate will be faster than when using. This is due to the water vapor in the air after the condensation will be condensed to form a water film covering the surface of the container, and other chemical impurities in the air to form an electrolyte solution, so as to achieve the conditions of electrochemical corrosion. If the media is inherently corrosive, in the disabled period is not clean, but also with the water film common role in the corrosive wall. During the deactivation period, the internal medium must be drained and cleaned, kept dry, etc., if necessary, need to fill the inert gas for airtight protection.