These small pipe pieces are termed piping spools. The complete piping system is separated into pieces that are transported to the site for erection. Isometric drawings also inform which piping should be constructed at the fabrication shop and which should be assembled at the construction/platform field itself. For example, if double piping is modeled by mistake, it will read the double quantity of material.ĥ. However, It is always better to check and verify as there could be some issues with the modeling itself that may cause discrepancies in material and quantity. Imagine complex design and yet orthographic drawings are used for construction, that is really a headache. The following figure gives an example of how one Isometric drawing can represent three orthographic drawings. Piping Isometric drawings are popular because of their simplicity yet efficiency to convey complex information.
The actual sizes are notified in the Bill of Material, tagging, call-out, or notes.
