Does the manufacturer of the container need to provide a calculation sheet for the container design?
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Without the calculation sheet, can the manufacturer proceed with production? What’s the use of such a calculation sheet for the manufacturer? Isn’t it enough to have the blueprints?
Manufacturers need to have their production processes supervised by a boiler inspection agency, and they also need to prepare various documents related to inspection and manufacturing. Calculations are required for all of these purposes. According to the relevant regulations, the documentation prepared for production must include calculations~
Agree with what was said above; it’s required according to the new regulations! It is also needed during actual inspection!
For the original design documents, those from abroad must include strength calculation sheets; in China, it seems that such sheets are required only for category three containers
The new regulatory requirements stipulate that pressure vessels must provide a calculation report to the user. If the calculation sheet is not provided to the manufacturer, the completion documents will be missing it.
Well, those that belong to the category are needed, while those outside the category are not.
May I ask how many manufacturers currently use calculation sheets as proof of quality at the time of shipment for non-Category 3, non-analytical design containers? There is always a difference between the tolerance specifications and the actual conditions, and the revision of tolerance specifications as well as reprints after corrections represent the result of this compromise. There are still many issues unresolved, such as the use of imported grades.
Manufacturers actually don’t need calculation sheets, but regulatory requirements stipulate that such sheets must be included in the delivery documents; therefore, they are needed even for supervision and inspection. It’s a matter of procedure – they have to be used – but in reality, very few people actually look at them. As long as it's there. . . . . . . . .
Manufacturing plants actually don’t need calculation sheets! ! ! A blueprint is sufficient, but the new regulatory requirements stipulate that calculation sheets must be included in the delivery documents; therefore, they are needed even for supervision and inspection – it’s a matter of following established procedures. . . . . . . . .
I see that some have calculation sheets (for reaction vessels, falling film reactors, etc.), while others don’t. What’s the reason for that?
The calculation sheet is provided only to the user; if the manufacturing site needs it, it can be requested from the user. By the way: I would like to ask whether it is necessary to stamp the pressure vessel seal on the calculation sheet? No specification provided for tolerance.