Extract every tag number, ISA 5.1 symbol, and instrument identifier from P&IDs with classification accuracy above 99%. Automated tag register generation for EPC handover.
Pre-trained on the complete ISA 5.1 symbol set. Recognizes control valves, instruments, actuators, and safety devices with classification accuracy above 99%.
Parses tag prefixes, functional identification letters, loop numbers, and suffix codes per ISA 5.1 conventions. Flags non-standard tags for review.
Generate complete tag registers with tag number, description, P&ID reference, loop assignment, and safety classification, ready for handover.
Tags appearing on multiple P&IDs are consolidated with revision tracking and positional context from each drawing.
Generate tag registers for EPC handover packages
Validate tag consistency across P&ID sets
Build instrument loop diagrams from extracted tag data
Create tag-to-document traceability matrices
Pathnovo recognizes the full ISA 5.1 symbol set: flow instruments (FI, FT, FE, FIC, FCV, FY, FQI), temperature instruments (TI, TT, TIC, TCV, TY), pressure instruments (PI, PT, PIC, PCV, PY, PSV, PSE), level instruments (LI, LT, LIC, LCV, LY, LG), analysis instruments (AI, AT, AIC, AY), control valves with all body and trim variants, safety valves, rupture discs, flame arresters, actuators (pneumatic, electric, hydraulic, self-actuated), transmitters, and all standard modifier symbols per ISA 5.1 Tables 2-1 through 2-12. Beyond ISA 5.1, DIN, BS, JIS, and company-specific conventions also supported.
Yes. While ISA 5.1 is the primary training standard, models also handle DIN (German), BS (British), JIS (Japanese), and company-specific tag conventions. Saudi Aramco SAEP tag conventions, QatarEnergy tag conventions, PETRONAS, ADNOC, BP, Shell, Chevron, and other operator-specific conventions are pre-configured. Non-standard or ambiguous tags are flagged for manual review. Custom tag convention encoding configured at project kickoff.
99% classification accuracy on ISA 5.1 standard symbols, dropping to 97-98% on hand-drawn legacy P&IDs with heavy annotation markup. Accuracy is validated on sample review before full project release. Every extracted tag carries bounding-box evidence on the source P&ID for independent audit. 99.5% contractual field-level accuracy SLA applies to the aggregate deliverable with penalty clause.
Yes. Tag extraction is the first step of the broader instrument index automation workflow. Once tags are extracted, Pathnovo cross-references with instrument datasheets, line lists, equipment lists, and C&E matrix to populate the full instrument index deliverable. See /solutions/instrument-index-automation for the end-to-end workflow.
Yes. Tag extraction is available as a standalone deliverable for clients who just need a tag register (e.g. for EDMS population, HAZOP preparation, MoC impact analysis). Both tag-only extraction and full instrument index generation are included on every paid tier and draw from the same credit pool: a complex P&ID consumes 20 credits whether you take only the tag list or the full index plus datasheet linkage. A typical instrument index project fits comfortably inside Starter (1,000 credits/month) or Professional (5,000 credits/month). See our pricing page for full plan details.
Pathnovo uses computer-vision models specifically trained on the ISA 5.1 instrument identification standard, the Instrumentation Society of America's specification for P&ID symbology. The models recognize symbol shapes (circle, square, hexagon, diamond), functional identification letters (F, T, P, L, A for flow / temperature / pressure / level / analysis, plus all modifiers), tag number formats, and connection patterns (signal lines, pneumatic lines, electrical lines, hydraulic lines, capillary lines per ISA 5.1 Table 2-2). Training data includes 200,000+ engineering drawings spanning five decades of P&ID conventions: hand-drawn from the 1970s, early CAD from the 1980s-1990s, modern intelligent P&IDs from SmartPlant / AVEVA / Siemens COMOS / Bentley OpenPlant. This breadth is why Pathnovo handles legacy brownfield drawings that general-purpose vision models (including frontier LLMs like GPT-4V) fail on.
Send us 10 documents from your current project. We extract, reconcile, and show you exactly what we find in 48 hours, before any contract.
If the accuracy isn't what we promised, you owe us nothing.
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