☣️ UN 3167 • CLASS 2
UN 3167 — Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid
Placard: Flammable Gas. ERG Guide 115. 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 3167 Quick Details
UN 3167
Product name: Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid
DOT Class: 2
Placard type: Flammable Gas
ERG Guide: 115 (check current ERG)
Initial isolation: ERG 115: isolate spill or leak area immediately for at least 100m in all directions; evacuate area if large spill or fire present
Common Hazards of UN 3167
- EXTREMELY FLAMMABLE.
- Will be easily ignited by heat, sparks or flames.
- Will form explosive mixtures with air.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Vapors may travel to source of ignition and flash back.
- Cylinders exposed to fire may vent and release flammable gas through pressure relief devices.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
Chemical Identity & Physical Properties
| Also known as | Non-pressurized gas sampleFlammable gas sample NOSGas sample in non-pressurized container |
| Appearance | Gaseous material at room temperature, stored in non-pressurized containers. Color and odor vary depending on specific gas composition. |
| Flash Point | Not applicable (gas) |
| Boiling Point | Not applicable (varies by composition) |
| Vapor Density | Varies by composition (typically heavier than air) |
| Water Reactivity | No significant reaction with water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3167
Extinguishing Media
Do not use water; use dry chemical, CO2, or inert gas to extinguish
PPE Requirements
⚠️ Level B minimum; SCBA required; avoid all ignition sources; ensure adequate ventilation
Isolation & Evacuation
ERG 115: isolate spill or leak area immediately for at least 100m in all directions; evacuate area if large spill or fire present
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 115).
First Actions for a UN 3167 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.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- Consider initial downwind evacuation for at least 800 meters (1/2 mile).
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📋 Copy & Share Field Card
UN 3167 — Gas sample, non-pressurized, flammable,HAZMAT RADIO NOTE — UN 3167
Product: Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid
Class 2 / Flammable Gas / ERG 115
PPE: Level B minimum; SCBA required; avoid all ignition sources; ensure adequate ventilation
ISOLATION: ERG 115: isolate spill or leak area immediately for at least 100m in all directions; evacuate area if large spill or fire present
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 3167 — Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid
Class: 2 | Placard: Flammable Gas | ERG Guide: 115
Appearance: Gaseous material at room temperature, stored in non-pressurized containers. Color and odor vary depending on specific gas composition.
Water Reactivity: No significant reaction with water
Extinguishing: Do not use water; use dry chemical, CO2, or inert gas to extinguish
PPE: Level B minimum; SCBA required; avoid all ignition sources; ensure adequate ventilation
Isolation: ERG 115: isolate spill or leak area immediately for at least 100m in all directions; evacuate area if large spill or fire present
— Key Hazards —
• EXTREMELY FLAMMABLE.
• Will be easily ignited by heat, sparks or flames.
• Will form explosive mixtures with air.
— 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.
• Many gases are heavier than air and will spread along the ground and collect in low or confined areas
SOURCE: allfirefighter.com/hazmat/un/3167 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3167 Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid Cls2 ERG115 | allfirefighter.com/hazmat/un/3167SMS / 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/3167
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Frequently Asked Questions about UN 3167
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.
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 B minimum; SCBA required; avoid all ignition sources; ensure adequate ventilation
Water reactivity: No significant reaction with water. Recommended extinguishing: Do not use water; use dry chemical, CO2, or inert gas to extinguish.
ERG Guide 115 recommendation: ERG 115: isolate spill or leak area immediately for at least 100m in all directions; evacuate area if large spill or fire present
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 115 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.