This elevation drawing was drawn with the RFFlow software. Elevation drawings show the vertical location of process equipment in a building. It is useful for checking equipment and performing startups and shutdowns.

If you haven't already done so, first download the free trial version of RFFlow. It will allow you to open any diagram and make modifications.

Once RFFlow is installed, you can open the above drawing in RFFlow by clicking on elevation-drawing.flo. From there you can zoom in, edit, and print this sample diagram. It is often easier to modify an existing diagram than to draw it from scratch.
To draw this diagram without downloading it, run RFFlow, click on the More Shapes button , scroll and open the Industrial Objects folder, click a stencil and click the Add Stencil button.