If the design pressure of a pressure vessel classified in a certain category changes, is it necessary to redraw the drawings?
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This post was last edited by YeTangZhangShang on 2019-7-17 at 14:11. Previously, I designed a pressure vessel; all the drawings were completed and stamped. The owner says that the actual working pressure is greater than what was designed. To change the working pressure, is it necessary to redraw the drawings, or is a change order sufficient?
Create new drawings and prepare new calculation sheets again
As long as the working pressure is not higher than the design pressure, there is no problem under normal circumstances, unless it exceeds the design pressure.
Why? Could you please provide which standard it is?
What if it’s higher than the design pressure? What if it’s not higher? How should they be treated? Thank you
The drawings need to be redone due to significant changes in the design conditions.
Due to pressure changes, the drawings need to be redesigned.
It’s fine as long as it’s not higher; if it is, there’s no need to ask – of course, new drawings need to be created.
This will definitely need to be redrawn; for example, the thickness of the cylinder, the width and thickness of the equipment flanges, as well as the number of bolts can all change. The differences are particularly significant in cylinders with large diameters.
It’s a little higher; the margin taken into account during design was sufficient, and recalculation of wall thickness and similar parameters didn’t result in any changes. In simple terms, it’s the pressure on the data table that has changed; everything else remains the same.
It’s a little higher; the margin taken into account during design was sufficient, and recalculation of wall thickness and similar parameters didn’t result in any changes. In simple terms, it’s the pressure on the data table that has changed; everything else remains the same. Do I need to redraw the diagrams as well? (The calculation sheet definitely has to be redone.)