Design service life of pressure vessels
Thread Content
If a pressure vessel was manufactured in November 2010, has a design service life of 8 years, and was not put into use immediately after being installed in March 2011 but rather after one year, in February 2012, then by what date will it reach its design service life?
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Specifically, it can be determined based on the results of the periodic inspection reports
1. It is calculated based on the date of commissioning, but this date is determined by the user themselves, and it is generally not accepted by the inspection authorities； 2. It is necessary to inform them before installation; once informed, the supervision department will urge you to obtain the usage permit as soon as possible. If too much time passes, the supervision department will not recognize the date on which you started using it ； 3. If installation is carried out without notification, it is very likely to result in heavy fines, making it not worth the risk ； 4. If the oversight authorities determine that you have not used it, it is necessary for you to cut off the source of pressure; if the device has such a source or is connected to one, it is considered that you have used it, and detection in such cases may result in heavy fines ； 5. It’s normal for there to be a one-year delay, but you need to communicate properly with the supervision and inspection departments and follow the relevant procedures. In simple terms, you should get in touch in advance before installation and explain your situation; this way, you’ll avoid unnecessary trouble.
The machine was just put into use – how could it already have a periodic inspection report?
The General Administration merely explained that it should actually be determined in accordance with Article 3.6 of TSG08-2017. 3.6 Determination of the date for regular inspections: The date of the first regular inspection, as well as the dates for regular inspections after modifications or disassembly and reinstallation, shall be determined by the user unit in accordance with safety technical specifications, supervision inspection reports, and the actual usage conditions.
Safety technical specifications are of a specialized nature, and it is difficult for users to fully understand them; therefore, it is advisable to consult the supervision or inspection authorities. Before the implementation of TGS08-2017, it was determined by inspection agencies.