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What factors in an air separation plant affect the condition of the plant?

What factors in an air separation plant affect the condition of the plant?
Jul 10, 2024
Author: DEAR AST

In air separation equipment, the state of the equipment is affected by a variety of factors, which are directly related to the operational efficiency, stability and safety of the equipment.
The main influencing factors:
Equipment itself factors, equipment aging, wear and rot, design defects, component failure;
Operation and maintenance factors, improper operation, untimely maintenance, maintenance level;
Environmental factors, atmospheric pressure, ambient temperature, air humidity, airborne impurities;
Other factors, poor air quality, installation and commissioning, operating load;
In order to keep the equipment in good condition, DEAR Air Separation needs to carry out regular maintenance, improve the skill level of operators, strengthen the environmental management and reasonably control the operating load in order to maintain the good condition of the equipment in the actual work.

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Special pressure-bearing equipment generally bears internal pressure, that will cause tensile stress inside the shell, which is called working stress. The working stress is directly proportional to the pressure and diameter, and inversely proportional to the vessel wall thickness. The axial stress is half of the circumferential stress. Therefore, for cylindrical vessels, the stress of longitudinal weld is twice that of girth weld. Because the geometric shape of the spherical shell is symmetrical to the spherical center, and the axial stress is equal to the circumferential stress in numerical value. Therefore, the wall thickness of the spherical vessel can be reduced by half as much as that of the cylindrical vessel under the same pressure and diameter.
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