A drawing that reads cleanly can still carry mismatches an engineer would only catch by re-tracing it by hand. P&ID QC checks your extraction against the drawing itself — starting with line numbers — and flags what doesn't match, what's missing, and what it can't confirm.
Works on clean, CAD-native P&IDs today. Scanned and flattened drawings aren't yet supported for this check.
How this is different: P&ID QC never changes a valve assignment on its own. Every result is a flag for your review; the final engineering decision stays with you.
Does the line number assigned to this valve match what the drawing itself shows for it — not just the nearest text label?
The assigned line doesn't match — flagged as a likely misread, along with the line the drawing actually shows.
A line number was left blank — P&ID QC can suggest one from what the drawing shows for that valve.
Two valves that share the same line run were assigned different line numbers — worth a second look.
P&ID QC doesn't reduce a drawing to a single score. Every valve gets one of five verdicts, so you know exactly where to spend your review time.
The assigned line matches what the drawing shows.
It doesn't match — likely a misread.
Blank line, but one can be suggested.
Consistent, but confidence is lower.
Can't be checked — left honest, not guessed.
Think of it as a second, independent check against your extraction. It reduces how much of the drawing you have to manually re-trace, but it doesn't replace your review. Every contradiction, recovery, and conflict is a flag for a qualified engineer to confirm — PID Intelligence does not change a valve assignment on its own.
An upgrade on top of P&ID Extraction, with its own plan and pricing — no separate tool to open.
Upload your P&ID and run P&ID Extraction as usual — valve schedule, line numbers, the full output.
P&ID QC checks every valve's assigned line as part of that same extraction — no separate tool to open.
Work through anything flagged, then export your results — ready for your records.
Line-to-drawing validation — the check on this page — is the first available today. It's part of a broader set of checks under the PID Intelligence QC name, including checks that reconcile a drawing against an official line list or tag register. More become available as your plan supports them.
Each row is one valve. P&ID QC either confirms the assigned line, flags what doesn't match, or is honest that it can't check that one.
| Tag | Assigned line | Verdict | Drawing shows | Confidence |
|---|---|---|---|---|
| FV-101 | 9001-8-UA-A1A01-0010 | Supported | 9001-8-UA-A1A01-0010 | High |
| MV-1247 | 2101-CS-150 | Contradicted | 2104-CS-150 | High |
| BV-0440 | — | Recoverable | 1800-CS-150 | Medium |
| CV-0512 | 1800-CS-150 | Supported | 1800-CS-150 | High |
| PSV-0210 | 3050-SS-300 | Unvalidated | — | — |
Sample only — illustrative of verdict behaviour. Actual results depend on drawing quality and how much of the drawing can be resolved.
Yes — P&ID QC is its own plan, priced separately from P&ID Extraction. It's not included automatically with an extraction plan.
Whether the line number assigned to each valve matches what the drawing itself shows for that valve. It doesn't check spec codes, NPS, valve type, or drawing conventions — those live in your extraction output.
No. P&ID QC never changes a valve assignment on its own. Every contradiction, recoverable blank, or conflict is presented as a flag for you to review and decide on — the final engineering decision stays with you.
Right now, P&ID QC works on clean, CAD-native P&IDs. Scanned or flattened drawings aren't supported for this check yet — those valves show as unconfirmed rather than a guess.
See our Privacy Policy for full details on how your data is processed and retained.
One package that includes every validation check — no separate subscription.
For smaller firms or project-based work — matches P&ID Extraction Starter volume.
For active projects — matches P&ID Extraction Essential volume.
Full plan pricing on the Pricing page →
No separate tool to open — it runs as part of the extraction itself.
Request beta access →