P&ID review, loop drawing verification, instrument index audit — catching design errors before they become field problems. Cheaper to fix on paper than on site.
15+
Years Field Experience
100%
E&I Focused
0.0
TRIR Safety Record
24hr
Typical Response Time
What We Review
Design Review Scope
P&ID Review
Line-by-line review against project specifications, design basis, and applicable standards. Tagged instrument verification against datasheet registers.
Instrument tag verification against datasheet register and line list
Control valve fail position, drain/vent spec, and interlock source confirmation
Utility system consistency check across all affected sheets
Tie-in, battery-limit, and interface definition review
Comments categorized: Safety-Critical, Hold, Clarification, Minor
Loop Drawing Verification
Completeness and accuracy check of loop drawings against P&IDs, wiring schedules, and panel layouts. Signal continuity traced end-to-end.
Signal type confirmation: 4–20mA, digital I/O, HART, and data highway
Barrier and isolator matching for IS and Class I Div 2 field devices
Terminal strip numbering continuity checked from field to DCS/marshalling
Grounding and shielding scheme review against project grounding philosophy
Cable number cross-reference against cable and conduit schedule
Instrument Index Audit
Tag-by-tag verification of instrument index entries against datasheets, P&IDs, and loop drawings. Missing tags, spec mismatches, and duplicate entries flagged.
Tag format and numbering convention compliance checked against project standards
Calibrated range vs. process range and turndown ratio verification
Spec class, line class, and flange rating cross-check per line list
Area classification consistency across index, P&IDs, and area classification drawings
Missing, duplicated, or orphaned tags flagged in comment register with P&ID reference
Electrical One-Line Review
One-line diagram and panel schedule review against load calculations and applicable codes. Hazardous area classification verification included.
MCC, switchgear, and panel schedule load balance and ampacity verification
Overcurrent protection coordination review for motors, feeders, and branch circuits
Area classification and wiring method consistency per NEC Articles 501–503
Grounding electrode conductor sizing and equipment grounding continuity
E-stop, lockout, and safety interlock circuit tracing against cause-and-effect matrix
Comment Register
Formal comment register with category, disposition, and response tracking. Delivered in your format — Word, Excel, or Bluebeam markup.
Comment register delivered in Excel, Word, or native Bluebeam markup — your format
Categories: Safety-Critical, Hold, Clarification, Minor — each with resolution path
Disposition tracking: accept, reject, or revise with response status per comment
Redline markup set keyed to comment numbers for direct drawing reference
Follow-up response round included for unresolved or revised items
Why Pre-Construction Review Pays
A drawing error found in review costs an hour to fix. The same error found during loop checks costs a day. Found during start-up, it costs a week — plus schedule delay and contractor back-charges.
We Know What to Look For
Our reviewers have done the loop checks on the other side. We know the errors that show up repeatedly — missing signal ranges, incorrect fail positions, grounding inconsistencies — and look for them specifically.
Deliverable-Driven
Every review produces a comment register, redline markup set, and disposition log. Your engineering team gets actionable items, not a narrative report no one reads.
Ready to Review Your Drawings?
Send us the package. We'll scope the review and respond within one business day.