Canvas Symbols for Oil and Gas

While using Canvas, I want to create work packages with standardized symbols for oil and gas, similar to a library including gate valves, globe valves, control valves, needle valves and more. 

The PDF editor I currently use allows me to add custom symbols, this could be an option. BlueBeam (REVU20 Extreme) allows me to customize them myself or add them to my toolbox (google a library of symbols to add). 

Another feature could be to have customizable text boxes that can be added similar to a sticker and edit the contents per the package.