The following information must be included in piping isometric drawings: It shows all information necessary for fabrication and erection.
An isometric drawing covers a complete line as per the line list and P&ID.Latest P&ID/PEFS (Process) (Issued signed copy) General Information about Piping Isometric drawings.and is conversant with a drafting tool can draft isometric. A draft person ( piping designer/engineer) who knows to read the piping GA.
Types of Lines in Engineering Drawing (PDF)