CAD drawing: A1 and A2 scale issues
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I would like to ask the experts here: what is the principle behind using a standard drawing frame at a certain scaling factor when creating equipment layout diagrams in CAD? When drawing flowcharts, since there is no scale specified, how should one choose the size of the drawing frame? For example, in such a flowchart, an A2 drawing frame is chosen, but no scale is indicated
Flowcharts generally maintain their original proportions; it’s the aspect ratio part that matters“/”； For the scale values indicated in equipment layout diagrams, piping layout diagrams, etc., if the content of the drawing is on a 1:1 scale, the value entered in the field for the scale factor represents the number of times the original drawing frame has been enlarged
Hello, I’m wondering how to understand this original scale. For example, a flowchart can be scaled down to a very small size or enlarged to a larger one, as long as it fits within the given space. I can understand when a equipment layout is drawn at a scale of 1:100. But what about in a flowchart? The size of the reaction vessel there doesn’t seem to matter
Piping and instrumentation diagrams are generally not resized; they retain their original A1 or A2 dimensions (841*594, 594*420). However, this is not an absolute rule, and it is best to avoid any resizing； To draw a flowchart, start by placing a frame, then arrange the devices inside it; adjust the size of the devices based on the density of devices as well as the pipes and annotations ； For layout diagrams, the equipment is usually placed according to requirements first, and then a frame is added to the diagram; this requires enlarging the frame (in most cases). The scale used is generally an integer value, which is indicated in the title bar ；
Thank you, I learned * a little by the way.