WORKER SAFETY – Oil and Gas
Oil and Gas Fire Prevention:
What Every Worker Needs to Know
What Every Worker Needs to Know
Fire and explosion are the most severe hazards in oil and gas operations. Most fires on oil and gas sites are preventable. This guide covers the main fire causes in oil and gas, how to recognise fire hazards before they ignite, what to do in a fire emergency, and the daily actions every worker can take to prevent a fire on their site.
#1
Fire and Explosion: Leading Process Safety Event
Fire and explosion are the leading cause of catastrophic process safety events in oil and gas globally. Most result from loss of primary containment of flammable hydrocarbons. OSHA PSM Overview
80%
Of Oil and Gas Fires Are Preventable
OSHA and industry analysis consistently shows that approximately 80% of oil and gas fires involve a preventable failure: a missing ignition control, a bypassed hot work permit, or uncontrolled hydrocarbon release. Energy Institute Process Safety
3
Things Every Fire Needs: Fuel, Oxygen, Ignition
Remove any one of the three elements of the fire triangle and a fire cannot start or continue. Oil and gas fire prevention focuses on controlling hydrocarbon fuel and ignition sources. NFPA Fire Triangle
Fire Hazards in Oil and Gas: What Causes Fires on Site
Oil and gas sites handle large volumes of flammable hydrocarbons under pressure and at elevated temperatures. Any release of these materials near an ignition source can cause a fire or explosion. Understanding where fires come from helps workers spot hazards before they ignite.
Hydrocarbon Leaks and Spills
Gas leaks from pipe flanges, valve stems, and pump seals are the most common fire precursor in oil and gas. Even a small leak in an area with an ignition source can cause a flash fire. Liquid spills from tank overflow, hose failure, or connector pull-out create pools of flammable liquid. Always report any smell of gas or visible liquid leak immediately.
Hot Work Without a Permit
Welding, cutting, grinding, and brazing produce sparks and heat that can ignite hydrocarbon vapours or flammable materials nearby. Hot work without a valid permit is one of the most common causes of preventable fires. Never perform hot work without a completed hot work permit and a fire watch in place.
Electrical Faults
Faulty wiring, overloaded circuits, damaged equipment, and non-intrinsically safe tools used in classified hazardous areas are common ignition sources. Never use a standard power tool in a Zone 1 or Zone 2 classified area. Only use equipment rated for the area classification.
Static Electricity
Static discharge during fluid transfer, tank loading, and powder handling can ignite flammable vapours. Always bond and earth tanks and containers before and during fluid transfer. Never use non-conductive hoses or fittings for flammable liquid transfer without earthing controls.
Friction and Mechanical Sparks
Grinding, impact between metal tools, and mechanical equipment failure can produce sparks that ignite flammable vapours. Use spark-resistant tools in hazardous areas. Never use steel tools on valve stems or fittings in a gas-rich environment without checking the area classification.
Spontaneous Combustion
Certain materials, including iron sulfide scale common in oil and gas equipment, can ignite spontaneously when exposed to air. When opening vessels or piping that have contained sour hydrocarbons, wet the internal scale before it is exposed to air. Follow the site procedure for opening vessels that may contain pyrophoric materials.
Signs of Danger: When to Stop Work and Move Away
Stop Work Immediately If You Notice Any of These
Smell of gas or rotten eggs
Move upwind immediately. Do not operate any electrical switches. Alert your supervisor and call the emergency number. Do not re-enter the area until it has been cleared.
Visible mist, vapour, or liquid spray from equipment
This is a hydrocarbon release in progress. Move upwind and uphill. Activate the emergency alarm. Do not attempt to close valves unless you are trained and it is safe to do so.
Unusual heat from equipment surfaces
Hot equipment surfaces can indicate a fire behind insulation or inside a vessel. Report immediately. Do not touch the surface. Stand back and alert your supervisor.
Flames, smoke, or sparks near a process area
Activate the nearest fire alarm point. Call the emergency number. Move to the assembly point. Do not attempt to fight a process fire unless you are trained and the fire is small enough to be safely extinguished.
Fire alarm or gas detector activation
Treat every alarm as real until confirmed otherwise. Move to the assembly point immediately. Do not return to the work area until all-clear is given by the site emergency coordinator.
Any equipment making unusual sounds near a flammable area
Hissing, banging, or vibration from piping or vessels can indicate a developing release. Report immediately and move away from the area.
You have the right to stop work if you believe there is a fire or explosion hazard. No job is worth your life. Use your site stop-work authority. Your supervisor cannot overrule a safety stop for a genuine emergency. OSHA Stop-Work Authority
How to Prevent Fires: Step-by-Step for Every Worker
1
Know Your Area Classification Before You Start
Every area on an oil and gas site is classified by its risk of flammable atmosphere. Zone 0 (continuous gas presence), Zone 1 (periodic gas presence), and Zone 2 (occasional gas presence) require different controls and equipment. Before starting any task, confirm the area classification and make sure your tools and equipment are rated for that zone. Never take a standard mobile phone, non-intrinsically safe radio, or standard power tool into a classified area.
2
Check for Active Gas Leaks Before and During Your Task
Before you start work and periodically during any task in a process area, check for gas using the fixed detector readings and, where required, a personal gas monitor. If your personal gas monitor alarms, stop work immediately, move upwind, and report. Do not attempt to continue working in a gas-detected atmosphere. A gas alarm is a stop-work event, not a warning to work faster.
3
Never Perform Hot Work Without a Valid Permit
Hot work includes welding, cutting, grinding, brazing, and any activity that generates sparks or heat. Before any hot work begins, a hot work permit must be completed, signed by the authorised person, and physically displayed at the work location. The permit must confirm that the area has been gas-tested, that flammable materials have been removed or isolated, and that a trained fire watch is in place. If you are asked to perform hot work without a permit, refuse and report to your supervisor.
4
Inspect Your Equipment for Leaks Before Use
Hose connections, valve packings, pump seals, and pipe flanges can develop small leaks that are not immediately visible. Before using any process equipment, visually inspect connections for drips, staining, or corrosion that indicates a developing leak. Report any leak, however small, before starting work. Do not start a pump or compressor if you have noticed a leak at the seal or connection.
5
Bond and Earth Before Any Fluid Transfer
Static electricity builds up during the transfer of flammable liquids and can discharge as a spark at the fill point. Before any transfer of flammable liquid, bond the source container to the receiving container with a bonding cable, and earth the receiving container to a verified earth point. Do not begin the transfer until both connections are confirmed. Never use a plastic container for receiving flammable liquids unless it is conductive and earthed.
6
Keep Ignition Sources Away from Hydrocarbon Work Areas
Common ignition sources include cigarettes and lighters, mobile phones, non-IS tools, vehicle engines, and hot surfaces. Smoking is only permitted in designated smoking areas that are verified as non-classified. Never bring a lighter or matches into a process area. Park vehicles at the designated distance from process equipment and switch off engines before approaching.
7
Store Flammable Materials Correctly
Flammable liquids must be stored in approved containers, in ventilated storage areas, away from ignition sources, and in quantities that do not exceed the site’s maximum in-use and storage limits. Never store flammable liquids in areas used for eating or rest. Keep the lids on flammable liquid containers when not in use. Segregate flammable liquids from oxidisers.
8
Know Where Your Fire Extinguisher and Assembly Point Are
Before starting any task on a new site or in a new work area, locate the nearest fire extinguisher, the nearest fire alarm call point, and the route to the assembly point. You should be able to reach the nearest fire extinguisher within 30 seconds from any point in your work area. If you cannot, report the gap to your supervisor. Know the type of extinguisher available and what it can be used on.
Fire Prevention: Do and Do Not
DO
+Report any gas smell, liquid leak, or unusual equipment sound immediately
+Carry your personal gas monitor where required and respond to every alarm
+Check that a hot work permit is in place before you or anyone near you starts hot work
+Bond and earth before every flammable liquid transfer
+Use only intrinsically safe (IS) or explosion-proof (EX) tools and equipment in classified areas
+Know your assembly point and the route to it before starting any task
+Use your stop-work authority if you believe a fire or explosion hazard exists
+Keep fire extinguisher access paths clear at all times
DO NOT
–Never perform hot work without a valid permit signed by the authorised person
–Never use a standard mobile phone, lighter, or non-IS tool in a classified area
–Never ignore a gas detector alarm or assume it is a false alarm without verification
–Never transfer flammable liquids without bonding and earthing in place
–Never store flammable liquids beyond the approved quantity limits or in non-approved containers
–Never block access to a fire extinguisher, alarm call point, or emergency exit
–Never continue working if you smell gas or see a liquid spray from process equipment
–Never fight a process fire unless you are trained and the fire is at the incipient stage
What to Do in a Fire Emergency
1
Raise the Alarm
Activate the nearest fire alarm call point immediately. Shout FIRE if you cannot reach a call point. Your first action is to alert others — not to fight the fire.
2
Call the Emergency Number
Call the site emergency number. Give your name, your location, what is on fire, and whether anyone is injured. Stay on the line until you are told to hang up.
3
Get Yourself and Others Out
Move away from the fire upwind and uphill. Help anyone nearby who cannot move themselves. Do not use lifts. Close doors behind you as you leave to slow the spread of fire.
4
Go to the Assembly Point
Go directly to your designated assembly point. Do not stop to collect personal items. Do not return to the building or process area for any reason until all-clear is given.
5
Only Fight a Small Fire If Trained and Safe to Do So
If the fire is at the incipient (very early) stage, you are trained in fire extinguisher use, and you have an escape route behind you, you may attempt to extinguish it with the correct extinguisher type. If the fire is large, growing, or involves process equipment, do not attempt to fight it. Evacuate.
6
Account for Everyone at the Assembly Point
Your supervisor or area warden will conduct a headcount at the assembly point. Report to them and stay until everyone is accounted for. Tell the warden immediately if you believe anyone is missing or injured.
Extinguisher Types: Use the Right One
Water (Red)
Class A fires: wood, paper, textiles. Never use on electrical or flammable liquid fires.
CO2 (Black)
Class B and C: flammable liquids and electrical fires. Safe on energised equipment.
Dry Powder (Blue)
Class A, B, C and D. Effective on hydrocarbon fires but leaves residue. Use outdoors.
Foam (Cream)
Class A and B: flammable liquid fires. Good for fuel spill fires.
Supervisor Tips: Fire Prevention Responsibilities
Verify hot work permits before any hot work starts
Walk the work area before signing any hot work permit. Confirm that the area has been gas-tested in the last hour, that flammable materials have been removed or isolated within 10 metres, and that a trained fire watch is physically present at the work location with an extinguisher in hand.
Conduct pre-shift fire hazard checks
Before the shift starts, check that fire extinguishers are in place and unobstructed, that alarm call points are accessible, that ignition source controls (no-smoking signs, area classification markings) are visible and correct, and that no new leaks have developed overnight.
Enforce ignition source controls in classified areas
Remind workers of the area classification at the start of each shift. Conduct a spot-check of tools and equipment being brought into classified areas. Confiscate and remove any non-IS tools or personal items that could be ignition sources before work starts, not after.
Ensure all workers know the emergency response plan
At site induction and at the start of any new task, confirm that all workers in your team know the assembly point, the emergency number, the location of the nearest fire alarm call point, and the nearest fire extinguisher. Do not assume this information was retained from a previous induction.
Investigate every near-miss fire event before the next shift
A gas detection alarm that was not investigated, a hot work permit signed for the wrong location, or a liquid spill that was cleaned up without reporting are all near-miss fire events. Investigate and implement corrective action before the next shift starts. Report the finding through the site incident management system.
Worker Fire Prevention Checklist
Before You Start
+Confirmed area classification and correct tools for the zone
+Checked gas detector readings (fixed and personal)
+Verified hot work permit is in place if hot work is required
+Located nearest fire extinguisher and confirmed it is accessible
+Located nearest fire alarm call point
+Know the assembly point and the route to it
+Inspected equipment connections for leaks
+Confirmed bonding and earthing in place for any fluid transfer
During the Task
+Monitoring personal gas detector and responding to alarms
+Keeping ignition sources away from process equipment
+Reporting any new leaks or spills immediately
+Not performing hot work beyond the permit scope or location
+Keeping extinguisher access paths clear
+Staying alert to changes in area conditions
+Not bringing non-IS equipment into the classified area
+Maintaining fire watch if assigned
After the Task
+Hot work permit formally closed and fire watch completed 30 min post-work
+Work area checked for smouldering materials after hot work
+All flammable liquids returned to approved storage
+Bonding and earthing cables disconnected and stored
+Any leaks or spills identified during the task reported in the system
+Tools and equipment removed from the classified area
+Work area left clean with no flammable debris
+Handover to next shift includes any fire hazard observations
Source: OSHA Process Safety Management | NFPA 30: Flammable and Combustible Liquids Code | OSHA Hot Work Permit 1910.119(k)
Key Takeaways
Most oil and gas fires are preventable
Approximately 80% of oil and gas fires involve a preventable failure. The most common are hot work without a permit, uncontrolled hydrocarbon release near ignition sources, and ignition source controls that were bypassed. Every worker has a role in preventing these failures.
A gas alarm is a stop-work event, not a warning
When your personal gas monitor or a fixed detector alarms, stop work immediately and move upwind. Do not silence the alarm and continue working. Do not assume it is a false alarm until the area has been re-tested and cleared by a competent person.
Never perform hot work without a valid permit
Hot work without a permit is one of the leading causes of preventable fires on oil and gas sites. No time pressure, no production schedule, and no supervisor instruction overrides the requirement for a completed hot work permit with gas testing confirmed and a fire watch in place.
You have the right to stop work for fire hazards
If you see a fire hazard — a gas leak, hot work without a permit, an ignition source in a classified area — you have the right and the responsibility to stop work and report it. Your employer cannot discipline you for exercising stop-work authority in good faith.
Frequently Asked Questions
What is the most common cause of fire on oil and gas sites?
Loss of primary containment of flammable hydrocarbons near an ignition source is the most common root cause. The ignition source is most frequently hot work without a permit, followed by electrical faults in classified areas and static discharge during fluid transfer. Controlling hydrocarbon releases and removing ignition sources from process areas are the two most effective fire prevention controls. OSHA PSM Overview
What should I do if I smell gas at my worksite?
Stop work immediately. Do not operate any electrical switches, mobile phones, or radios in the area. Move upwind and uphill. Alert your supervisor and other workers by shouting or using a non-electrical means. Call the site emergency number from outside the affected area. Do not re-enter the area until a competent person has re-tested it and confirmed it is safe.
Can I perform hot work without a permit if it is a very short task?
No. OSHA 29 CFR 1910.119(k) requires a hot work permit for any ignition source work in areas where a flammable atmosphere could exist. There is no minimum task duration exception. A 30-second grind in the wrong location without a permit has caused fatal fires on oil and gas sites. The permit process is not an optional administrative step: it is the control that prevents ignition by confirming the area is gas-free before hot work begins. OSHA 1910.119(k)
What type of fire extinguisher should I use on a flammable liquid fire?
For a flammable liquid (Class B) fire, use a CO2 extinguisher (black label) or a foam extinguisher (cream label). Do not use a water extinguisher on a flammable liquid fire: water spreads the burning liquid and makes the fire worse. Dry powder (blue label) can also be used on Class B fires and is effective outdoors. CO2 is preferred for indoor or equipment fires because it leaves no residue.
What is a fire watch and when is one required?
A fire watch is a trained person assigned to watch for fire or smouldering during and after hot work. A fire watch is required whenever hot work is performed in an area where a fire or explosion could occur. The fire watch must stay at the hot work location for the duration of the work and for a minimum of 30 minutes after hot work is completed, as fires frequently start in smouldering materials after the work is done. The fire watch must have a fire extinguisher and must not perform any other duties while assigned. OSHA 1910.119(k)
Why do I need to bond and earth containers before transferring flammable liquids?
During the transfer of flammable liquids, friction between the liquid and the container or pipe generates static electricity. If this static charge builds up and discharges as a spark at the fill point or nozzle, it can ignite flammable vapours above the liquid surface. Bonding connects the source and receiving containers so they are at the same electrical potential, preventing a discharge between them. Earthing connects the receiving container to ground so the static charge is safely dissipated. Both are required before any flammable liquid transfer.
What tools can I use in a Zone 1 classified hazardous area?
In a Zone 1 area, only tools and equipment certified as intrinsically safe (IS) or explosion-proof (EX) for the specific gas group and temperature class of the area may be used. Standard power tools, standard mobile phones, and standard radios are not permitted. The area classification marking and the site’s electrical equipment register will show the required certification for your area. If you are unsure whether a tool is rated for the zone, do not use it until you have confirmed with your supervisor or the site electrical authority. OSHA Electrical Classified Areas
Sources
Government and Regulatory Sources
- OSHA. 29 CFR 1910.119(k): Hot Work Permit: hot work permit requirements; fire watch minimum 30-minute post-work obligation; gas testing before permit issuance.
- OSHA. Process Safety Management Overview: PSM programme requirements including ignition source control, emergency response, and incident investigation for flammable hazard facilities.
- OSHA. Oil and Gas Well Drilling and Servicing: stop-work authority; classified area requirements; hydrogen sulfide controls.
- OSHA. Electrical Safety in Classified Hazardous Areas: Zone 0, 1, 2 classification; intrinsically safe (IS) and explosion-proof (EX) equipment requirements.
Research and Industry Sources
- Energy Institute. Process Safety: Lessons from High-Consequence Events: 80% preventable fire statistic; loss of primary containment as leading fire cause in oil and gas; ignition source control effectiveness data.
- NFPA 30: Flammable and Combustible Liquids Code: bonding and earthing requirements; storage quantity limits; container and area requirements for flammable liquids.
- NFPA. Fire Triangle and Combustion Principles: fuel, oxygen, ignition as the three elements of fire; application to oil and gas hydrocarbon fire prevention.
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