PIPING LAYOUT | PIPING GUIDE For piping layout, the most important applications to look for are those intended for generating orthographic piping drawings and piping isometric drawings. Application software, specific to piping layout, can significantly increase the productivity of the application of CAD.Downloads · Piping Check List for Piping Layouts - Piping-engineering www.piping-engineering›ChecklistsThis checklist is intended for checking of layout drawings extracted from 3D CAD models. As a minimum, the checklist shall be completed for the first issue of the layout drawing. Items like Fire and Gas detectors and other E, I & T items (e.g. JBs, switch boards, lighting fittings, etc.) need not be shown in Piping Layouts.