Thread Content
To maintain the good performance of equipment and prevent failures during use, it is necessary to identify the components that are likely to fail and replace them before such failures occur. In fact, it is very difficult to accurately replace the components that may fail. Usually, it relies on equipment maintenance managers to correctly determine this optimal time by using the empirical data collected from their work, as well as various performance inspection records from the equipment’s operation. That is, replace the components before a failure occurs. The methods for conducting inspections on corporate equipment include patrol inspections carried out mainly by operators, regular inspections of the equipment, and special inspections. 1. Implement routine inspections carried out primarily by operators. Routine inspections involve operators conducting periodic checks on equipment along predetermined inspection routes, at set intervals (usually 1–2 hours), at specified locations, and covering defined inspection items. Routine inspections generally employ subjective inspection methods. The five-step operation method: listen (to check for any abnormal sounds during the operation of the equipment), feel (to check if there are any abnormal temperatures in the bearings and other areas), inspect (to check for leaks, drips, or other defects in the equipment and pipelines), observe (to ensure that the operational parameters of the equipment meet the specified requirements), and smell (to detect any unusual odors from the areas where the equipment is operating). Or use simple instruments to measure and observe the changes in data continuously measured by online instruments. The general contents of a routine inspection include: checking the temperature, lubrication, and vibration of bearings and related areas ； Listen to the sound of the device in operation; check for any abnormal knocking or rubbing sounds ； Check the operation of control and metering instruments as well as automatic adjustment devices for temperature, pressure, flow rate, liquid level, etc ； Check the tightness and smoothness of the drive belts, steel cables, and chains ； Check the operation of the cooling water, steam, and material systems ； Check that the safety devices, braking devices, accident alarm devices, and stop devices are in good condition ； Check whether the safety guards, protective railings, and the insulation/cooling measures for the equipment pipelines are in good condition ； Check whether the equipment’s mounting foundation, foot bolts, and other connection bolts are loose, or whether vibration is occurring as a result of loose connections ； Check for leaks at the static and dynamic sealing points of the equipment and process pipelines. If any abnormal conditions are detected during the inspection, the cause should be identified immediately, and appropriate adjustments should be made promptly. In the event of any emergency hazards such as unusual noises, vibrations, severe leaks, sparks, etc., immediate action should be taken, after which the situation should be reported to the workshop equipment technician or equipment supervisor so that appropriate measures can be taken to address it. The inspection results and handling outcomes shall be carefully recorded in the operation records and equipment routine inspection form. 2. Regular equipment inspection: Regular equipment inspection refers to the process in which maintenance workers and specialized inspectors, using inspection standards established based on the equipment’s performance requirements, examine specified parts of the equipment. Regular equipment inspections are generally divided into daily inspections, regular shutdown inspections, and special inspections. Routine inspections are periodic checks that maintenance workers perform on major equipment on a daily basis, in accordance with the requirements of the equipment inspection standards. The inspection methods rely mainly on human senses. Examples of the daily inspection procedures, inspection standard documents, and inspection record forms for equipment are listed below. Figure 1-1 shows the routine inspection procedure for the equipment ； Table 1-1 is the daily inspection standard for turbine chillers ； Table 1-2 is the daily equipment inspection record form.