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Decades of paper drawings, microstation files, AutoCAD DWG exports, and hand-marked as-builts at your refinery or petrochemical plant: AI extracts the structured asset data trapped inside, 99.5% contractual accuracy, IBR / OISD 118 / PESO / CCOE compliance views included. 6 to 12 week brownfield digitisation, not a 24-month consultancy engagement.
In short
Pathnovo's Legacy CAD Document Extraction for Petrochemical Plants processes scanned paper drawings, microstation DGN, AutoCAD DWG / DXF, intergraph MicroStation exports, legacy PDS and ISOGEN outputs, and hand-drawn drawings spanning the 1970s through current revisions at refineries, petrochemical, fertiliser, gas processing, and LNG facilities. Models trained on 200,000+ engineering drawings recognise ISA 5.1, ASME / API conventions, ANSI / ISA P&ID symbology, OISD 118 / PESO drawing conventions, and proprietary L&T, Tata Projects, Toyo, KBR, Engineers India, McDermott, Petrofac, Worley, Saipem, and Wood project library conventions. Typical Indian PSU refinery brownfield digitisation, 5,000 to 15,000 drawings with 30+ years of MoC redlines and turnaround markups, completes in 6 to 12 weeks (vs 12 to 24 months for a manual consultancy engagement, at 60 to 85 percent lower cost). 99.5% contractual field-level accuracy on safety-critical fields; 97-98% on heavily annotated or faded scans, with per-batch accuracy estimate before commit. Indian regulatory bundle (IBR Form IV, OISD 118, PESO Form XIV / XV, CCOE) generated automatically. Output loads directly into SAP PM S/4HANA, IBM Maximo, AVEVA AIM, Bentley iTwin, Hexagon HxGN SDx2, and Cognite Data Fusion. Reference: McDermott live, 10,247 tags across 600 P&IDs, zero QA rejections.
Process scanned paper drawings, microstation DGN, AutoCAD DWG / DXF, intergraph MicroStation, legacy PDS exports, ISOGEN outputs, hand-drawn isometrics, faded blueprints, and photographed drawings. No re-drawing in modern CAD required. Models trained on 200,000+ engineering drawings spanning five decades of petrochemical-industry drawing conventions.
ISA 5.1 instrumentation symbology, ASME / API piping conventions, ANSI / ISA P&ID symbols, OISD 118 and PESO drawing conventions for Indian refineries, plus the proprietary conventions specific to L&T, Tata Projects, Toyo, KBR, Engineers India Limited, McDermott, Petrofac India, Worley, Saipem, and Wood project libraries. Recognises hazardous-area-classification annotations and SIL-classification overlays.
Typical Indian PSU refinery brownfield digitisation spans 5,000 to 15,000 drawings with 30+ years of accumulated revisions, hand-marked as-builts, MoC redlines, and turnaround markups. Pathnovo processes the full corpus into a current-state digital register in 6 to 12 weeks. Reference benchmark: McDermott engagement processed 600 P&IDs at 10,247 tags with zero QA rejections.
Validate extracted data across document types: does the P&ID tag match the datasheet? Does the isometric match the line list? Does the valve specification match the PMS? Does the IBR Form IV register match the mill cert chain? Discrepancies flagged before they reach SAP PM or the handover package. See the [reconciliation page](/reconciliation) for the detailed workflow.
IBR Form IV register, OISD 118 layout and HAZOP compliance, PESO licence and hazardous-area register, CCOE Form XIV tank-farm register, all generated automatically alongside the extracted asset data. Critical for Indian PSU refineries (IOCL, BPCL, HPCL, ONGC, GAIL, NTPC) and Indian EPC contractors operating under MoPNG and PNGRB jurisdiction. See the [Indian EPC compliance bundle](/compliance/indian-epc-compliance-bundle).
Decades-old paper redlines, handwritten MoC markups, turnaround as-built annotations, and field-discovered changes consolidated into a structured change register. MoC-to-as-built completeness scoring identifies approved MoCs not yet reflected in as-built and as-built changes lacking MoC traceability, both audit findings for OISD 118 / PESO / Chief Inspector reviews. See the [as-built documentation page](/solutions/engineering-handover/as-built-documentation).
Structured output loads directly into SAP PM S/4HANA functional locations and equipment master, IBM Maximo asset / location registers, AVEVA AIM via AVEVA Connect, or Bentley iTwin / Hexagon HxGN SDx2 / Cognite Data Fusion for digital twin programmes. No middle translation, no manual Excel rework. CFIHOS 2.0 and ISO 15926 native output supported by every major target platform.
99.5% field-level accuracy on safety-critical fields (tag numbers, instrument loops, line numbers, design pressures, SIL classifications, IBR-scoped pressure parts, hazardous-area zones), with a contractual remedy clause. 97-98% on heavily annotated or faded scans, with per-batch accuracy estimate before commit. The only published contractual SLA in the engineering-document-extraction category.
Indian PSU refinery brownfield digitisation: 30+ years of accumulated paper drawings, scanned P&IDs, and hand-marked MoC redlines converted to a current SAP PM functional-location and equipment-master register
Petrochemical plant revamp baseline: pre-revamp as-built capture from legacy paper and microstation drawings establishes accurate starting point for revamp P&ID design and procurement
Acquisition due diligence: legacy CAD and paper drawing archive assessed and digitised within 2-4 weeks for accurate asset valuation in M&A scope
Gas processing plant digital twin initialisation: 1970s-2000s drawings extracted into CFIHOS 2.0 / ISO 15926 data layer for AVEVA AIM, Bentley iTwin, or Cognite Data Fusion ingestion
Insurance / asset valuation audit: current-state plant documentation rebuilt from paper-only archive for insurance underwriter inspection
Turnaround as-built refresh: post-outage redlines capturing replaced equipment, modified piping, new instrumentation fed into SAP PM
IBR Form IV register reconstruction: legacy mill certificates and pressure-equipment paper records digitised into IBR-compliant register for Chief Inspector of Boilers audit
OISD 118 compliance backlog: decades of paper HAZOP studies and inter-distance drawings structured into MoPNG / PNGRB audit-ready format
Legacy CAD document extraction for petrochemical plants is the AI-powered conversion of scanned paper drawings, microstation DGN files, AutoCAD DWG / DXF, intergraph MicroStation exports, legacy PDS and ISOGEN outputs, and hand-drawn drawings from refinery, petrochemical, fertiliser, gas processing, and LNG facility archives into structured, machine-readable engineering data. Every Indian PSU refinery and most Gulf petrochemical owner-operators carry 20 to 50 years of accumulated paper and legacy-CAD drawings that hold the only authoritative record of current plant state. Pathnovo extracts the tags, lines, equipment, instruments, valves, piping specifications, and design conditions from any era of drawing into one current-state digital register, CFIHOS 2.0 and ISO 15926 native, ready for SAP PM, IBM Maximo, or AVEVA AIM loading.
Pathnovo's legacy CAD extraction is in production with Indian PSU refineries (IOCL, BPCL, HPCL, ONGC, GAIL, NTPC), Indian PSU EPCs (L&T Hydrocarbon, Tata Projects, Petrofac India, Toyo Engineering India), global EPCs running Indian projects (McDermott, Wood, Worley, Saipem), and petrochemical owner-operators across India, the Gulf, and Southeast Asia. Indian PSU rate-card compatibility available at Scale and Enterprise tiers. See the India regional page and the Indian EPC compliance bundle.
Yes. Pathnovo's training corpus spans 200,000+ engineering drawings across five decades of petrochemical-industry drawing conventions, including hand-drawn drawings from the 1970s, early CAD (microstation, AutoCAD R12) from the 1980s and 1990s, and modern intelligent P&IDs. Faded blueprints, photographed drawings from mobile cameras, hand-annotated MoC redlines, and rotation / skew on scans are handled without pre-processing. Accuracy on heavily annotated legacy drawings runs 97-98% (vs 99.5% on clean drawings) with a per-batch accuracy estimate provided before commit.
IBR Form IV register (Indian Boiler Regulations 1950) for IBR-scoped pressure equipment, OISD 118 layout and HAZOP compliance views for MoPNG / PNGRB audit preparation, PESO licence and hazardous-area register for Petroleum and Explosives Safety Organisation scope, and CCOE Form XIV tank-farm register for Chief Controller of Explosives licensing. All four regulatory regimes generated automatically alongside the extracted asset data. Critical for Indian PSU operations and Indian EPC handovers. See the IBR compliance page, the OISD 118 standard page, and the PESO compliance page.
Manual brownfield digitisation by a consultancy team (typical engagement: 8-15 engineers for 12-24 months on a refinery archive) historically costs $300K to $3M and produces 90 to 95 percent accurate data with no contractual SLA. Pathnovo delivers the same scope in 6 to 12 weeks at fixed credit-based pricing with a contractual 99.5% accuracy SLA. The cost reduction is typically 60 to 85 percent vs the consultancy model; the timeline reduction is typically 80 to 90 percent. See our pricing page for plans.
Yes. Pathnovo's extraction engine is regulatory-agnostic at the document layer (every document type and every drawing convention supported globally). The Indian regulatory bundle (IBR / OISD 118 / PESO / CCOE) is the regional overlay for Indian operations; equivalent regional overlays for ASME / API global scope, GCC operators (Aramco / ADNOC / KOC / QatarEnergy), and Southeast Asia (Petronas / Pertamina / Thai Oil) are available. Data residency configurable: Azure India Central for Indian scope, Azure UAE North and AWS Riyadh for GCC scope, Azure Singapore and AWS Singapore for Southeast Asia scope. See the regions directory for regional detail.
Pre-certified connectors for SAP PM S/4HANA (functional location, equipment master, maintenance task lists via IDOC / BAPI / OData), IBM Maximo (asset / location via MIF / MEA / REST), AVEVA AIM (Connect platform via API + CFIHOS 2.0 schema), Bentley iTwin (via API + ISO 15926 RDF), Hexagon HxGN SDx2 (via SmartPlant Foundation), and Cognite Data Fusion (via Cognite API). Output is also available as JSON, CFIHOS 2.0, ISO 15926 RDF, Excel, or direct API for custom target platforms. No middle translation layer; no manual Excel rework. See the engineering handover page for the loading workflow.
Project-based. A typical Indian PSU refinery brownfield archive (5,000 to 15,000 drawings, 30+ years of revisions, MoC redlines, IBR / OISD / PESO compliance overlay) sits comfortably on Pathnovo's Scale tier (25,000+ credits per month) on a 3 to 6 month engagement, with one-time data-room ingestion priced per page for the historical archive. Indian PSU rate-card compatibility available. Scoped paid pilot on the Starter tier available to validate on a sample before scale-up. See our pricing page for plans.
Yes. CFIHOS 2.0 and ISO 15926 RDF output flows directly into AVEVA AIM, Bentley iTwin, Hexagon HxGN SDx2, Cognite Data Fusion, and any digital twin platform. Pathnovo sits upstream as the extraction engine; the chosen twin platform handles contextualisation, operational data fusion, and analytics. For petrochemical owner-operators running digital twin programmes, the engineering-data foundation is typically the first 6 to 12 months of the programme; Pathnovo compresses that to weeks. See the digital twin data integration page.
Hand-drawn drawings from the 1970s and 1980s typically extract at 95 to 97 percent field-level accuracy. Faded blueprints with rotation / skew typically 96 to 98 percent. Photographed drawings from mobile cameras typically 94 to 97 percent depending on lighting and angle. Clean modern P&IDs run at the full 99.5% contractual SLA. Every batch begins with a sample-review accuracy estimate before commercial commitment, and a per-sheet audit trail with bounding-box evidence is provided with every delivery.
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