Calculation of the service life of pressure vessels
Thread Content
Is the service life of pressure vessels calculated from the date of manufacture or from the date of commissioning? Thank you everyone!
It should be calculated starting from the date of commissioning.
I also think it refers to the date of commissioning, but who can explain why it’s not the date of manufacture? Thank you
As the name implies, the service life...
I really don’t know anything about the manufacturing and production process. I have a question: Suppose a new factory has pressure vessel equipment that was manufactured and delivered according to the contract in a certain year. However, due to financial issues and other reasons, construction of the project came to a halt after half of it was completed; the equipment remained on site for 5 years. After those 5 years, construction of the factory resumed, and the facility was put into use after another year. The regulations require that a usage registration certificate be obtained within 30 days before and after putting it into use. The device has been idle for 6 years now; can it be used right away?
This situation is a special case; it is necessary to conduct a thorough inspection to determine whether it is still in its original condition, especially with regard to rust...
In practice, it is always calculated based on the date of manufacture, as this date is verifiable, reliable, and trustworthy； Moreover, there is a lot of uncertainty regarding the provision of the commissioning date, and its credibility is low.
There are also quite a few such cases. A comprehensive inspection must be carried out prior to commissioning, to check whether there are any deficiencies compared to the original design documents, and an inspection report shall be issued. Together with the original design documents, they serve as the technical documents required for registration, and it is necessary to indicate in the equipment registration list which devices have been in use for 6 years, along with providing written explanations for such placement.
Agree with the opinion on the seventh floor. In practice, it is always calculated based on the date of manufacture, as this date is verifiable, reliable, and trustworthy ； Moreover, there is a lot of uncertainty regarding the provision of the commissioning date, and its credibility is low. By commissioning date: How to confirm it is an issue. The date of manufacture, as per the production records, is well-documented.
I have another question: who will conduct the inspection in this situation? Who will issue the test report? Is it the user unit?