PFD and P&ID Development for a New Process Unit

Problem

A new process unit needed a complete set of PFDs and P&IDs developed from an early process concept through a HAZOP-ready design package, with enough detail for downstream piping, instrumentation, and equipment specification work to proceed.

Approach

• Built the PFD from the governing mass and energy balance, documenting major stream conditions, equipment duties, and control philosophy at a level suitable for early-stage review.
• Developed the P&IDs in parallel with equipment and instrument specification, keeping line numbers, equipment tags, and instrument tags consistent across all documents.
• Managed markup and redline cycles through internal design review and client HAZOP, tracking action items back to specific drawing revisions.
• Maintained a single source of truth for tag numbering so downstream disciplines (piping, instrumentation, electrical) could work from the same P&ID revision without conflicting information.

Outcome

Delivered a HAZOP-ready P&ID package on schedule, with all HAZOP action items closed out against a controlled drawing revision and no open tag-numbering conflicts at issue for detailed design.