What is the degree of the top-view scale on the pressure vessel equipment drawings?
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Are there degrees indicated on the top-down views of the pressure vessel equipment drawings I have? Are the 4 directions at 0, 90, 180, and 270 degrees required to be indicated according to the drawing specifications?
This degree is mainly used to indicate the opening angle of the pipe outlet, and it must be specified!
There is no mandatory requirement for this; it depends on the *practice of each design firm. If no scale is indicated, mark the angle from the pipe opening to the axis in the top view for positioning.
I agree with you! Although it’s not mandatory, using scale numbers makes things clearer, but they are sometimes omitted as well!
When the drawing is complex, it can be marked.
It should be marked, as this facilitates hole positioning and installation on the equipment; meanwhile, the PN direction also needs to be indicated.
I don’t see any mandatory requirements. However, the angle at which each outlet is located must be indicated
For your own convenience and for the sake of others, it’s better to mark it
Manufacturing units are very willing for design units to specify clear and precise manufacturing requirements, but design units often fail to do so.
There is no mandatory requirement for this; it depends on the practice of each design firm. In fact, it’s not necessary to include it, as long as the angles between each pipe outlet and the reference line are indicated
Adhering to the principle that the orientation of the pipe outlet should be clear and explicit, it is better to mark it clearly