QRA (Quantitative Risk Assessment) becomes a legal requirement in India when a facility stores or processes hazardous chemicals above the threshold quantities defined under state Major Accident Hazard (MAH) rules framed under the Factories Act 1948 — not for every industrial site handling any chemical at all. OISD and state Directorate of Industrial Safety and Health guidelines specify which chemical categories and quantities trigger mandatory QRA submission as part of site layout approval, environmental clearance, or factory license renewal. A specialty chemicals manufacturer in Dahej expanding storage capacity discovered mid-project that the additional inventory would cross the MAH threshold for a specific hazard category, requiring a QRA study before the expansion could proceed; commissioning it added roughly six weeks and ₹12 lakh to the project timeline, cost and delay that could have been planned for at the design stage instead of after civil work had begun. Facilities crossing MAH thresholds typically budget ₹8-25 lakh and 6-10 weeks for a compliant QRA study.
This guide sets out the specific triggers — chemical category, storage quantity, and process type — that make QRA a legal requirement rather than a discretionary safety exercise, and the approval process that follows submission.
QRA is legally required in India when hazardous chemical storage or processing crosses state MAH thresholds under the Factories Act 1948. Triggers depend on chemical category and quantity, not facility size alone. Studies typically cost ₹8-25 lakh and take 6-10 weeks.
This checklist helps project managers and EHS teams determine whether a Quantitative Risk Assessment is likely to be required and what evidence should be assembled. For detailed OISD, PESO, PNGRB and MoEFCC planning, see Elion’s QRA compliance guide. For full study delivery, visit the QRA service page.
Start with five applicability questions
- Does the facility handle flammable, explosive or toxic material in quantities capable of a major accident?
- Is the project seeking environmental, petroleum, gas, pressure-vessel, pipeline, layout or other statutory approval?
- Has the authority or Terms of Reference requested consequence analysis, risk contours, societal risk, ALARP or emergency-planning zones?
- Is the project new, expanding or materially changing its process, inventory, layout, safeguards or surrounding exposure?
- Does a client, insurer, lender or corporate process-safety standard require numerical risk evaluation?
A “yes” does not by itself define the final scope, but it signals that a formal applicability review is needed.
Common QRA trigger situations
| Trigger | Why QRA may be needed | Typical decision output |
|---|---|---|
| New hazardous facility | Test layout and offsite consequences before design is fixed | Effect zones, risk contours and mitigation |
| Major expansion | Quantify the change in risk from additional inventory or equipment | Existing versus proposed risk comparison |
| Material management of change | Check whether the existing study remains representative | Revalidation or focused addendum |
| Environmental appraisal | Answer project Terms of Reference and disaster-management inputs | Consequence and risk assessment package |
| Petroleum or gas project | Support applicable layout, safety and emergency requirements | Individual/societal risk and ALARP basis |
| Occupied-building decision | Assess exposure of control rooms and occupied structures | Building risk and siting recommendations |
| Emergency planning | Establish credible effect zones and response priorities | Scenario and planning-zone inputs |
| Insurance or lender review | Provide independent numerical evidence of major hazards | Dominant-contributor and mitigation register |
OISD-related applicability
OISD standards and guidelines address different petroleum-sector activities, including layout, fire protection, safety management, emergency preparedness and management of change. The applicable document and current edition must be identified for the installation. Some OISD standards gain statutory force when incorporated into rules or regulations, while others operate as industry standards or approval expectations.
Where QRA supports a deviation, non-conformity, layout or risk-reduction decision, the report should explicitly connect the identified gap, quantified risk, proposed mitigation and implementation responsibility. Check the current OISD standards list rather than relying on an old report template.
PESO-related applicability
PESO administers rules covering petroleum, explosives, gas cylinders and static or mobile pressure vessels. A QRA may support an approval or risk decision, but it does not replace mandatory drawings, distances, licences or rule-specific documents. First identify the exact rule, licence and competent authority.
For petroleum projects, begin with the current PESO Petroleum Rules resource and the project’s approval correspondence. The inventory and plot plan used in the QRA must match the approval basis.
PNGRB-related applicability
PNGRB regulations may be relevant to pipelines, city-gas distribution and other regulated oil-and-gas networks. Depending on the applicable regulation, QRA can inform layout-stage mitigation, major additions, changes in surrounding demographics and the Emergency Response and Disaster Management Plan.
The study should cover the regulated asset’s actual battery limits, credible releases, population exposure and the relationship between risk results and emergency actions. Consult the current PNGRB ERDMP regulations and project-specific requirements.
MoEFCC and environmental-appraisal context
Environmental-appraisal requirements vary by sector, project and issued Terms of Reference. Risk assessment and disaster-management information may be required for hazardous projects, but the QRA should answer the actual Terms of Reference and appraisal observations rather than reproduce a generic chapter.
Check that the QRA, hazardous-material inventory, project report and emergency plan use consistent quantities, layouts and consequence distances.
MSIHC and hazardous-chemical considerations
Where the Manufacture, Storage and Import of Hazardous Chemical Rules or related emergency-planning duties apply, confirm whether inventories and thresholds trigger specific obligations. The facility’s safety report, onsite emergency plan and offsite coordination inputs should be consistent with the quantified scenarios.
When an existing QRA should be updated
- New tanks, process units, pipelines, loading systems or major storage
- Material increase in hazardous inventory or operating pressure
- Change in substance composition or toxic/flammable properties
- Layout, occupied-building or control-room changes
- Modified detection, isolation, shutdown or fire protection
- Significant workforce, occupancy or surrounding-population change
- Major incident, new evidence or changed failure data
- New approval condition, standard edition or client criterion
Documents needed for a QRA applicability review
- Facility location and project description
- Current and proposed plot plans
- Hazardous-material inventory with maximum quantities
- Process conditions and major equipment list
- Approval letters and Terms of Reference
- Applicable licences, rules and client standards
- Existing HAZOP, HIRA, QRA and emergency plans
- Description of the proposed change or decision
Warning signs in a “QRA required” claim
- The claim is not tied to a named rule, approval or decision
- An outdated standard edition is quoted without verification
- Consequence analysis is presented as a full QRA
- The scope excludes population despite requiring societal risk
- Mandatory distances are treated as optional because a model suggests otherwise
- The report inventory differs from approval drawings