☣️ UN 3528 • CLASS 3
UN 3528 — Machinery, internal combustion, flammable liquid powered
Placard: Flammable. ERG Guide 128. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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UN 3528 Quick Details
UN 3528
Product name: Machinery, internal combustion, flammable liquid powered
DOT Class: 3
Placard type: Flammable
ERG Guide: 128 (check current ERG)
Initial isolation: ERG 128: Isolate spill 25m all directions; if tank/fuel system ruptured or fire involved, isolate 800m and consider evacuation 800m downwind
Common Hazards of UN 3528
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | Internal combustion engine equipmentGasoline-powered machineryPetrol-powered equipmentFlammable liquid engine machineryICE machinery with fuel |
| Appearance | Mechanical equipment or vehicles containing internal combustion engines with flammable liquid fuel (gasoline, diesel) in tanks or fuel systems. Appearance varies based on machinery type; may emit petroleum odor from fuel. |
| Flash Point | Varies by fuel type: gasoline approximately -43°C (-45°F), diesel 52°C (126°F) |
| Boiling Point | Varies by fuel type: gasoline 38-204°C (100-400°F), diesel 180-360°C (356-680°F) |
| Vapor Density | Vapors heavier than air (gasoline vapor density ~3-4, diesel ~4.5) |
| Water Reactivity | No significant reaction with water; fuel may float on water surface |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3528
Extinguishing Media
Alcohol-resistant AFFF foam, dry chemical, CO2; water spray for cooling
PPE Requirements
⚠️ Level D minimum for handling; Level B with SCBA if fire or fuel leak with vapor accumulation
Isolation & Evacuation
ERG 128: Isolate spill 25m all directions; if tank/fuel system ruptured or fire involved, isolate 800m and consider evacuation 800m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 128).
First Actions for a UN 3528 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
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📋 Copy & Share Field Card
UN 3528 — Machinery, internal combustion, flammablHAZMAT RADIO NOTE — UN 3528
Product: Machinery, internal combustion, flammable liquid powered
Class 3 / Flammable / ERG 128
PPE: Level D minimum for handling; Level B with SCBA if fire or fuel leak with vapor accumulation
ISOLATION: ERG 128: Isolate spill 25m all directions; if tank/fuel system ruptured or fire involved, isolate 800m and consider evacuation 800m downwind
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3528 — Machinery, internal combustion, flammable liquid powered
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Mechanical equipment or vehicles containing internal combustion engines with flammable liquid fuel (gasoline, diesel) in tanks or fuel systems. Appearance varies based on machinery type; may emit petroleum odor from fuel.
Water Reactivity: No significant reaction with water; fuel may float on water surface
Extinguishing: Alcohol-resistant AFFF foam, dry chemical, CO2; water spray for cooling
PPE: Level D minimum for handling; Level B with SCBA if fire or fuel leak with vapor accumulation
Isolation: ERG 128: Isolate spill 25m all directions; if tank/fuel system ruptured or fire involved, isolate 800m and consider evacuation 800m downwind
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/3528 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3528 Machinery, internal combustion, flammable liquid powered Cls3 ERG128 | allfirefighter.com/hazmat/un/3528SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/3528
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Frequently Asked Questions about UN 3528
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level D minimum for handling; Level B with SCBA if fire or fuel leak with vapor accumulation
Water reactivity: No significant reaction with water; fuel may float on water surface. Recommended extinguishing: Alcohol-resistant AFFF foam, dry chemical, CO2; water spray for cooling.
ERG Guide 128 recommendation: ERG 128: Isolate spill 25m all directions; if tank/fuel system ruptured or fire involved, isolate 800m and consider evacuation 800m downwind
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 128 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.