HPCL Vizag Refinery Fire: What Happened on 2 November 2026?
A detailed industrial safety case study exploring the latest refinery fire, major historical accidents, process safety challenges, and critical lessons every industry worker must understand.
The date was 2 November 2026. It was around 10:00 PM. Visakhapatnam, a coastal city in Andhra Pradesh, was going about its usual evening when a major fire broke out at the Hindustan Petroleum Corporation Limited (HPCL) Visakh Refinery. Tall flames and thick black smoke rose above the refinery, alarming residents in nearby areas, including Malkapuram.
The fire was reported at a Pitch Intermediate Storage Tank in the refinery's Residue Upgradation Facility (RUF). Videos of the flames spread rapidly, and people nearby wanted to know what had happened and whether the situation could affect other parts of the refinery.
For residents familiar with the refinery's history, the incident also brought back memories of earlier industrial accidents. The 1997 refinery fire and the fatal 2013 cooling-tower accident remain important reminders of the consequences that can follow when hazardous materials, equipment, work activities and safety barriers are not adequately controlled.
Because industrial safety is not limited to refinery engineers. Operators, technicians, maintenance teams, contract workers, supervisors, safety professionals and managers all have a role in identifying hazards and preventing major incidents.
In this case study, we will examine the reported events of 2 November 2026, understand what pitch and a Residue Upgradation Facility are, review major incidents associated with the Visakh refinery, discuss broader process-safety challenges, and identify practical measures that can help prevent future accidents.
1. The 2 November 2026 Incident: Understanding the Technical Background
Let us begin with the unit where the fire was reported: the Residue Upgradation Facility (RUF). The reported location was a tank used for storing an intermediate pitch product. To understand why such a tank is important, we first need to understand what happens to crude oil inside a refinery.
What is refinery pitch?
Crude oil is a complex mixture of hydrocarbons. In a refinery, it is processed through separation and conversion operations. During atmospheric and vacuum distillation, lighter fractions are separated from heavier fractions according to their boiling ranges and process conditions.
Products and streams such as LPG, naphtha, petrol blend components, kerosene, aviation turbine fuel and diesel are obtained through different refinery processing steps. The heavier fractions that remain after distillation may be sent to further processing units, including residue-upgradation facilities.
Pitch is a heavy, viscous refinery material or intermediate stream. Depending on the process and feedstock, pitch-related streams may be used in the manufacture of bitumen or other carbon-based products. The exact composition and handling requirements depend on the particular process and product specification.
Because heavy pitch materials can become highly viscous as they cool, they may need controlled heating and temperature management to maintain suitable flow and handling characteristics. Storage tanks, heating arrangements, vents, pressure protection, instrumentation and operating procedures must therefore be designed and maintained for the specific material and operating conditions.
What is the Residue Upgradation Facility (RUF)?
A Residue Upgradation Facility is designed to process heavier residue streams and improve the value obtained from crude oil. Rather than treating all heavy residue as a final waste product, refineries use specialised technologies to convert or process these streams into more useful products and intermediates. The precise configuration varies from refinery to refinery.
What is confirmed about the 2 November fire?
HPCL reported a fire involving a pitch intermediate storage tank at its Visakh Refinery. The incident was brought under control by the refinery's emergency response teams. The company reported that there were no casualties.
The reported location and emergency response are important facts. However, the exact ignition source, initiating equipment failure and root cause should not be treated as established unless confirmed by an official investigation.
Possible technical investigation areas
In a tank fire involving a hot, heavy hydrocarbon stream, investigators may examine several technical areas. These are investigation questions, not confirmed causes of this particular incident:
- Tank temperature control and heating-system performance.
- Pressure and vacuum protection arrangements.
- Tank venting and vapour-management systems.
- Level, temperature and pressure instrumentation.
- Mechanical integrity, corrosion and maintenance history.
- Emergency isolation and fire-protection system performance.
- Operating procedures, alarm response and shift handover records.
2. A Historical Timeline of Major Accidents at the Visakh Refinery
The history of industrial accidents associated with the Visakh Refinery demonstrates why process safety, mechanical integrity, emergency preparedness and contractor management must remain continuous priorities.
The 1997 LPG Disaster: A Major Refinery Tragedy
One of the most devastating accidents associated with the Visakh Refinery occurred on 14 September 1997. The incident involved an LPG release during transfer operations in the refinery's tank-farm area.
According to historical accounts, a failure associated with a pipeline connection and blind flange led to the release of a large quantity of liquefied petroleum gas. LPG vapour can spread along the ground because it is heavier than air under typical ambient conditions.
When a flammable vapour cloud encounters an ignition source, it can result in a flash fire or a vapour cloud explosion, depending on the circumstances, congestion and confinement.
The disaster caused extensive damage and loss of life. Historical reports commonly cite approximately 60 fatalities. The incident remains an important case study in hazardous-material transfer, pipeline integrity, emergency isolation and vapour-cloud hazard management.
Salt Water Cooling Tower Accident: 28 Fatalities
Another major tragedy occurred on 23 August 2013, involving the salt-water cooling tower area of the refinery. The accident claimed the lives of 28 contract workers and injured several others.
The accident highlighted the serious risks associated with construction and maintenance work near operating process facilities. Hazardous vapours, possible hydrocarbon ingress, hot work and inadequate control of worksite conditions are among the issues that must be carefully examined in such incidents.
A cooling tower may appear to be a relatively safe utility area, but its surroundings can still be exposed to hazardous process releases. A location should never be considered safe merely because its primary function involves water cooling.
Fire at Crude Distillation Unit – CDU III
On 25 May 2021, a fire was reported at the Crude Distillation Unit III of the HPCL Visakh Refinery. The incident was brought under control by the refinery's emergency response arrangements.
The incident again demonstrated the importance of fire detection, emergency response readiness, equipment integrity and safe operating practices in critical refinery units.
A Crude Distillation Unit is one of the central processing areas of a refinery. It separates crude oil into different fractions based on their boiling characteristics. A fire in this area requires a coordinated response because of the presence of hot hydrocarbons, process equipment and interconnected systems.
Fire at the Pitch Intermediate Storage Tank
The latest reported incident involved a pitch intermediate storage tank in the Residue Upgradation Facility. HPCL reported that the fire was controlled and no casualties occurred.
The incident has renewed attention on tank-farm safety, hot hydrocarbon handling, process monitoring, emergency preparedness and the importance of learning from earlier industrial accidents.
3. What Can These Accidents Teach Us About Process Safety?
When industrial accidents are studied together, they raise important questions about how organisations identify hazards, maintain equipment, manage work permits, train employees and verify the effectiveness of safety systems.
It is important not to assume that all four incidents had the same cause. Each event requires its own evidence-based investigation. However, the following areas are important subjects for every process-industry organisation.
A. Process Safety Management (PSM)
Industrial safety includes personal safety and process safety. Personal safety focuses on protecting individuals from workplace injuries through measures such as PPE, safe movement and housekeeping.
Process Safety Management focuses on preventing major incidents involving hazardous chemicals, flammable materials, high pressure, high temperatures and loss of containment.
A strong PSM system includes:
- Process Hazard Analysis (PHA).
- Operating procedures and safe operating limits.
- Mechanical integrity and inspection programmes.
- Management of Change (MOC).
- Permit to Work and safe work practices.
- Emergency planning and response.
- Incident investigation and corrective-action tracking.
- Training and competency verification.
A facility may have excellent PPE compliance and still face a major process-safety risk if its critical equipment, operating limits or protective systems are not properly managed.
B. Capacity Expansion and Maintenance Challenges
The Visakh Refinery has undergone expansion over the years. Increased processing capacity can introduce additional demands on equipment, utilities, storage, pipelines and operating systems.
Expansion projects must be supported by appropriate engineering reviews, inspection programmes, corrosion management, relief-system assessments and verification of equipment suitability.
Age alone does not prove that equipment is unsafe. What matters is its actual condition, design suitability, inspection history, maintenance quality and ability to operate within approved limits.
C. Early Warning, Instrumentation and Gas Detection
Modern refineries use instrumentation and protective systems to monitor process conditions. Depending on the design, these may include pressure transmitters, temperature sensors, level instruments, gas detectors, alarms, interlocks and safety-instrumented systems.
These systems must be correctly located, calibrated, tested and maintained. Operators must also be trained to respond to alarms rather than treating them as routine background signals.
An investigation should examine whether alarms were generated, whether they reached the control room, whether the instruments were functioning correctly and whether the required operating response took place.
It would be premature to conclude that a sensor or automatic shutdown system failed in the November 2026 incident without the relevant investigation findings.
D. Contractor Safety and Competency
Contract workers often perform maintenance, inspection, construction, cleaning, scaffolding and other essential tasks in industrial facilities. They may be exposed to the same hazards as permanent employees and must receive training appropriate to the work they perform.
Before work begins, contractors should understand site hazards, emergency alarms, evacuation routes, permit conditions, isolation boundaries, PPE requirements and stop-work procedures. Supervisors must verify that the worksite is safe and that conditions have not changed after the permit was issued.
The 2013 cooling-tower disaster is a particularly important reminder that hot work near process-connected systems requires rigorous hazard assessment, isolation and gas testing. Responsibility for safe work cannot be transferred to a contractor alone; the operating organisation must maintain effective oversight.
4. Four Important Measures to Strengthen Industrial Safety
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