Steam trap management

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Steam is a heat source widely used in industrial production, and the main function of steam traps in steam systems is to promptly discharge condensate water to prevent steam from escaping, thereby reducing the impact of condensate water on heat exchange efficiency. Over time, as the valve seat in a steam trap is opened and closed repeatedly, it gradually wears out, which leads to steam leakage and unnecessary economic losses. Therefore, how to promptly detect and repair or replace leaking steam traps is the key to steam trap management. Leakage in steam traps is difficult to determine in most cases; for instance, when condensate is discharged or recovered collectively, no leakage signs can be observed. In cases of minor leakage, leakage signs may be visible, but flash vapor is present. So, how can one detect leaks in a steam trap, and how often should it be checked? Here, it is recommended that professional testing equipment be used for inspections; key areas such as the equipment area should be inspected every six months, while all areas should be inspected once a year. Establishing a comprehensive testing system, conducting proper data collection and analysis for each test, and attaching appropriate labels to each steam trap can help achieve management objectives more efficiently. Currently, many enterprises are unable to manage their steam traps in a centralized manner; leaks in numerous steam traps go unnoticed for a long time. The economic losses resulting from leaks, ranging from minor to severe ones, are incalculable. Taking a certain Japanese-owned chemical plant as an example, in March 2019, 712 steam traps were inspected: 366 of them were taken out of service, 346 were in use, and 63 were leaking. Based on 330 days per year, 24 hours per day, and a price of 270 yuan per ton for steam, and after professional inspections, data collection, and software analysis, it was determined that the annual steam leakage amounted to 2,065 tons, resulting in annual economic losses of around 560,000 yuan. The economic losses caused by steam leaks at that company in 2015 were 5.5 times higher than they are now; the implementation of a comprehensive steam trap management system four years ago has yielded very significant results. Those interested in the management of steam traps can exchange ideas and improve together.