Rank: New forum user 
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Hi, I have a pressure vessel that has had its thorough examination carried out according to its WSE but it also lists alongside on the report that it has been subject to a "working examination" (both these have slightly different month expiration dates from when the next one is due).
Can anyone explain the differencee between the "thourough examination" and the "working examination" on the same report and could a "working examination" be used as its service record? (providing the manufacturers recommendations on servicing are in date with the certificated "thorough" and "working examinations")
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Rank: Super forum user 
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In the absence of other replies probably go back to those that did the inspections and ask them.
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Rank: Super forum user 
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My assumption has always been that a thorough examination involves inspecting the inside of the vessel, which obviously requires it not to be running at the time, whereas a working examination is more superficial and can be done while it is running (working). That's just my assumption though!
The records of the examinations should list what was included in them.
Examination is not the same as servicing as servicing would include taking any remedial or preventative action that was needed such as replacing parts whereas an examination report would only inform you of any action to be taken.
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Rank: Forum user
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Most pressure vessels have to have a written scheme which is done by a person who is deemed "competent" and they also have to undergo a "statutory thorough examination" at specific intervals. A thorough examination involves the pressure vessel being shut down and all of the systems contained within the written scheme being examined. This will include removal of any inspection plates/covers and a visual inspection of the inside of the pressure vessel. Once this is completed the pressure vessel is brought to working pressure and a "working examination" is carried out. The written scheme should state the interval for the statutory thorough examination and also for any additional examinations deemed by the inspector to be needed whether they be working examinations or otherwise. In the case of air compressors the statutory interval is 26 months at the most but the environment and use of the plant may mean it needs to be done at shorter intervals.
As Kate has said, this is not servicing but rather, inspection so you need to have any servicing carried out in addition to the examinations.
Edited by user 05 May 2018 20:19:05(UTC)
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