Section 3 - Quality Control


When checking is done incorrectly not only the end result (the document) suffers but the designer who created the document suffers and the checker who does the checking also suffers.

Checking Colour Code Table

Colours to use, what they mean & their primary use.

For those independent designers that work on their own, or that preliminary work that goes out for bid, there is no substitution for perfect work.
Incomplete work and errors, all cost extra.
Here are some useful tips to reduce what a checker would find to almost nothing.


This document is intended to provide various members of the Piping Department with suggestions of what to look for and what questions to ask during a P&ID (Piping and Instrument Diagram) Review.