An OISD 118 compliance guide for 2026 provides a framework for Indian refineries to meet safety standards through proper layout, design, and documentation. It involves managing P&IDs, HAZOP registers, and action tracking to ensure audit readiness, a process now being accelerated by AI-powered intelligent document processing to reduce manual effort and risk.
The Indian oil and gas industry treats compliance documentation like a necessary evil - a mountain of paper and PDFs to be grudgingly assembled for an audit and then forgotten. This is a catastrophic mistake. The Oilfields (Regulation and Development) Amendment Act, 2025 (ORDA 2025) didn't just update the rules. it fundamentally changed the financial risk of non-compliance. With penalties now reaching ₹25 lakh plus ₹10 lakh per day for ongoing breaches, the cost of disorganized documents has skyrocketed. The industry spends billions on physical safety systems but pennies on the data systems that prove they work. This has to change.
What is OISD 118?
OISD-STD-118 is a mandatory standard from the Oil Industry Safety Directorate that dictates the layout and safety requirements for oil and gas installations in India. It covers everything from minimum inter-distances between equipment to the documentation needed to prove process safety management. Its goal is to prevent catastrophic failures by enforcing proven engineering principles.
The standard isn't just about where you place a storage tank. It's the blueprint for operational safety, and the June 2025 revision doubled down on this. While engineers focus on the physical spacing, management often overlooks the standard's deep-seated documentation mandates. It demands a living, breathing record of your facility's safety case, from initial design to daily operations. Ignoring the paperwork is like building a state-of-the-art fire suppression system but never checking if the pipes have water. It creates a dangerous illusion of safety.
Who must comply with OISD 118?
Compliance with OISD 118 is mandatory for all new oil and gas installations and any existing facilities undergoing significant modification or expansion in India. This includes refineries, gas processing plants, petroleum terminals, and pipeline installations. Essentially, if you handle hydrocarbons under the purview of the Indian regulatory framework, this standard applies to you.
On the ground, this means everyone. The project team during greenfield construction. The maintenance crew during a brownfield upgrade. The safety officer preparing for a five-year HAZOP review. We all live by it. The problem is, the documents don't live with us. They're stuck on a shared drive, in folders named FINAL_rev2_USE_THIS_ONE. When an auditor shows up, the scramble begins. It's a fire drill every single time, and it's completely avoidable.
What are the key documentation requirements for OISD 118 in 2026?
Key OISD 118 documentation requirements for 2026 include up-to-date Piping and Instrumentation Diagrams (P&IDs), a comprehensive and auditable HAZOP study register, and a closed-loop action tracking system with verifiable evidence of closure. These documents form the core of a facility's process safety management (PSM) file and must be readily available for audits.
To meet these OISD 118 requirements, a facility must maintain a precise and interconnected set of engineering records. Think of it as a logical chain of evidence. The P&IDs represent the physical reality of the plant. The HAZOP studies analyze the risks within that reality. The action items are the documented steps taken to mitigate those risks. If any link in this chain is broken - an outdated P&ID, a missing HAZOP recommendation, or an untracked action item - the entire safety case fails.
The core deliverables include:
- Master Layout and Plot Plans: The foundational drawings showing equipment placement and confirming adherence to inter-distance norms.
- Piping and Instrumentation Diagrams (P&IDs): Must be the as-built, current revision. Any discrepancy between the P&ID and the physical plant is a major red flag.
- HAZOP Study Reports: Mandatory for new facilities before commissioning and for existing ones every five years or after a major change (iFluids Engineering). These reports must be complete, with all recommendations logged.
- Action Item Register: A log of all recommendations from HAZOP, audits, and incident investigations. This isn't just a list. it requires proof of closure for every single item.
Managing this manually is a losing battle. That's why leading refineries are now using AI-driven platforms for P&ID extraction and intelligence to create a digital foundation for their compliance documentation.
Key Takeaway: OISD 118 compliance is not a one-time event. It is a continuous process of documentation management where P&IDs, HAZOP reports, and action logs must be perpetually synchronized and audit-ready.
How does P&ID extraction support OISD 118 compliance?
P&ID extraction uses AI, specifically computer vision and Vision-Language Models (VLMs), to automatically identify, classify, and extract every symbol, tag, and connection from engineering drawings. This transforms a static image or PDF into a structured, searchable database of your assets, which is the essential first step for building a reliable HAZOP register and ensuring compliance.
Imagine your entire library of P&IDs - hundreds, maybe thousands of drawings - as a locked room full of file cabinets. Manual compliance is like sending an engineer into that room to read every single file label by hand, hoping they don't miss one. An intelligent P&ID extraction pipeline is like a system that instantly digitizes every document, creating a master index of every piece of information. You no longer search for a drawing. you query your assets directly.
The process works through a multi-stage pipeline:
- Image Pre-processing: The system first cleans up the scanned P&ID, correcting for skew, noise, and contrast issues to ensure the AI can read it clearly.
- Symbol and Text Recognition: A computer vision model, trained on thousands of examples of ISO 10628 and ISA 5.1 symbols, detects and classifies every pump, valve, and instrument. Simultaneously, Optical Character Recognition (OCR) extracts all text, including tag numbers and line specs.
- Relationship Mapping: This is the critical step. The AI doesn't just find the symbols. it understands the connections. It traces pipelines, links instruments to control loops, and builds a complete topological map of the process flow.
- Data Structuring: The final output is not another drawing. It's a structured JSON or CSV file - a digital twin of the information on the P&ID, ready to be loaded into a database or compliance management system.
This structured data becomes the single source of truth for all subsequent OISD 118 documentation tasks.
What are the HAZOP register requirements under OISD 118?
The OISD 118 standard requires a systematic and documented Hazard and Operability (HAZOP) study, with all findings and recommendations tracked to closure in a formal register. This register must be a live document, linked to the latest P&ID revisions, and available as evidence during regulatory audits to demonstrate proactive risk management.
Last turnaround, we nearly had a major incident. A HAZOP from three years ago recommended installing a new pressure safety valve on a naphtha line. The recommendation was in the report, a 200-page PDF sitting on the server. But it was never transferred to a work order. It was never added to the master action list. The project team that did the last debottlenecking used an older P&ID revision that didn't show the new requirement. We caught it during a pre-startup safety review, purely by chance. We lost two days fabricating the spool and getting the valve in. Two days of lost production because of one line item buried in a PDF.
This is the reality of HAZOP management. The study itself is rigorous. But the output is a dead document. The register is supposed to be the bridge between analysis and action, but it's almost always a manually updated Excel sheet that's out of sync with everything else. For an audit, you need to show the original recommendation, the P&ID it applies to, the engineering change request, the work order, and the final sign-off. Finding that paper trail for a single action item can take hours. For the hundreds of items from a full-site HAZOP, it's a nightmare.
How do you manage action tracking and closure documentation?
Effective action tracking and closure documentation is managed through a centralized, database-driven system that links every HAZOP recommendation to a specific asset tag and P&ID. This system automates notifications, collects evidence of completion like photos or work orders, and builds an immutable audit trail for every action, ensuring nothing is missed.
To solve the problem of lost recommendations, we need to stop thinking in terms of documents and start thinking in terms of data. We developed a methodology for our clients called the C.A.R.E. Compliance Model to structure this process:
- Capture: The process begins by using an NLP model to parse HAZOP study reports. The AI identifies and extracts specific, actionable recommendations, automatically categorizing them by risk level and associating them with the relevant P&ID and equipment tags.
- Assign: Once captured, each action item is assigned to a responsible engineer or department directly within the system. Deadlines are set, and automated reminders are triggered, creating clear accountability.
- Resolve: The assigned personnel carry out the work and then upload evidence of completion directly to the action item. This could be a photo of the new installation, a signed-off work order, or a revised operating procedure. This step is critical for creating a verifiable record.
- Evidence: The system automatically compiles all associated information - the original recommendation, the asset tag, the assigned owner, the evidence, and timestamps - into a complete, audit-ready closure report. An auditor can select any action item and see its entire lifecycle in seconds.
This C.A.R.E. model transforms the chaotic, manual process of action tracking into a systematic, automated workflow. It ensures that the insights gained during a multi-million rupee HAZOP safety study are actually implemented in the field, which is the entire point of the exercise.
47% of Indian enterprises already had multiple Generative AI use cases in production as of late 2025, showing a clear trend towards adopting AI for performance-driven tasks like compliance.
How does Pathnovo automate OISD 118 deliverables?
Pathnovo automates OISD 118 deliverables by using our Engineering Intelligence Platform to create a unified, digital view of a facility's compliance posture. We ingest legacy P&IDs and HAZOP reports, extract the critical data, and build an interconnected system that automatically tracks revisions, manages action items, and generates audit-ready reports on demand.
Here's the contrarian take most vendors won't give you: compliance isn't a cost center. The industry treats it like one, which is why they're stuck with manual processes and last-minute audit panics. An automated, always-on compliance system isn't about avoiding fines. it's about creating a dynamic asset register that unlocks operational intelligence. The regulator is just forcing you to build the data foundation you should have built a decade ago for your own benefit.
Our platform provides a single source of truth for Indian refinery compliance. Here is how we compare to the traditional, manual approach:
| Feature | Manual Compliance Process | Pathnovo's Automated Platform |
|---|---|---|
| P&ID Analysis | Manual review of hundreds of PDFs. slow and error-prone. | AI-powered extraction of all tags and lines in minutes. |
| HAZOP Register | Manually created and updated Excel sheets. often out of sync. | Automatically generated from HAZOP reports, linked to P&IDs. |
| Action Tracking | Email chains and spreadsheets. no central view or evidence. | Centralized dashboard with automated reminders and evidence upload. |
| Audit Preparation | Weeks of manual document collection and reconciliation. | On-demand generation of complete audit trails and reports. |
| Data Utility | Data is locked in static documents, used only for audits. | Data becomes a queryable asset for maintenance and operations. |
As Vinod Krishnan, Chief Digital and Information Officer at Essar, stated in July 2025, the real value in industrial AI comes from solving long-standing operational problems where small, repeated efficiencies compound massively. This is exactly what we do for compliance.
We transform the reactive, painful process of assembling OISD 118 documentation into a proactive, automated system that not only ensures compliance but also makes your facility safer and easier to manage. If you're ready to stop chasing paper and start building a foundation for operational excellence, explore our solutions for the oil and gas EPC industry.
What is OISD 118 and what does it cover?
OISD-STD-118 is a mandatory safety standard in India that governs the layout and design of oil and gas facilities. It covers critical aspects like the minimum safe distances between equipment, process units, and storage tanks to prevent incident escalation and ensure overall process safety.
Which types of installations must comply with OISD 118 in India?
All new oil and gas installations, including refineries, terminals, and gas processing plants, must comply with OISD 118. Existing facilities must also adhere to the standard when undergoing major modifications, expansions, or as part of their ongoing process safety management and periodic audit cycles.
Are HAZOP studies mandatory under OISD 118?
Yes, HAZOP studies are a mandatory component of the process safety management framework that OISD 118 supports. Facilities must conduct HAZOP studies before commissioning, every five years for existing operations, or after any significant process change, and maintain a detailed register of all findings and actions.
What are the key documentation requirements for this OISD 118 compliance guide?
This OISD 118 compliance guide highlights three core documentation requirements: current as-built P&IDs, a complete HAZOP study register with all recommendations, and a verifiable action tracking system that shows proof of closure for every identified risk. These documents must be accurate and interconnected.
How often do OISD standards get revised?
OISD standards are revised periodically to incorporate new technologies, learnings from incidents, and international best practices. For example, OISD-STD-118 was updated in June 2025. Facilities must ensure they are complying with the latest version of the standard, making continuous document management essential.
How can digital tools help with OISD 118 compliance?
Digital tools, particularly AI-powered document intelligence platforms, can automate the extraction of data from P&IDs and HAZOP reports. This creates a structured, searchable digital asset register, automates the creation of HAZOP action lists, and provides a centralized system for tracking compliance tasks, drastically reducing manual effort and errors.
What happens if an Indian refinery fails to comply with OISD 118?
Failure to comply with OISD 118 can result in significant financial penalties under the new ORDA 2025 regulations, including fines up to ₹25 lakh and additional daily fines for continuing breaches. More importantly, non-compliance represents a serious safety risk that can lead to operational shutdowns or catastrophic incidents.
What is the role of P&ID drawings in OISD 118 compliance?
P&ID drawings are the foundational documents for OISD 118 compliance. They serve as the official map of the process, used as the basis for HAZOP studies and for verifying that safety-critical instrumentation and systems are correctly installed. Any discrepancy between the P&ID and the actual plant is a major compliance failure.
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