As-Builts

As-builts are typically performed on the following drawing types to update them to actual construction and include deviations from the Issued for Construction revision in the final close-out set:

• P&IDs;
• Plot Plans; and
• Process Flow Diagrams.

An as-built typically includes:

• Mechanically as-built Process and Instrumentation Diagrams verified by a senior piping designer;
• Symbology Chart;
• Updated or new Process Flow Diagram; and
• As-built facility Plot Plan, including:
  • all surface items (as well as non-process equipment like guard rails, roads, storage areas, etc.);
  • underground pipe and cable routings and underground equipment depending on available information; and
  • survey boundary locations where a site survey exists.