UN 3530 — Machinery, internal combustion
Placard: Miscellaneous. ERG Guide 171. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3530 At a Glance
UN 3530 (Machinery, internal combustion) is listed as DOT Class 9 Miscellaneous and is assigned to ERG Guide 171. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 3530 is Machinery, internal combustion, a Class 9 internal-combustion machinery entry assigned to ERG Guide 171. Residual fuel, oil and hot components are main concerns.
Hazard overview: Class 9 internal-combustion machinery; hazards mainly come from residual fuel, oil, hot surfaces or stored energy. Some components may burn, but the machinery itself does not normally ignite readily. Residual fuel vapors may create a flash hazard if tanks or lines are damaged.
Response guidance: For UN 3530, isolate the area, avoid exposure and use SCBA where vapor, gas, dust, smoke or fire is present. Verify exact controls with SDS/ERG 171.
Firefighter training notes: Training for UN 3530 should emphasize product/article verification, SCBA use, pressure-release hazards, decontamination, runoff containment and SDS/shipping paper review. Use ERG 171, SDS and local SOP.
Regulatory context: Machinery, internal combustion is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, package type, gas identity and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Machinery, internal combustion should be stored in compatible packages with ventilation, restricted access and segregation based on SDS and shipping paper requirements.
UN 3530 Quick Details
Common Hazards of UN 3530
- Class 9 internal-combustion machinery; hazards mainly come from residual fuel, oil, hot surfaces or stored energy.
- Some components may burn, but the machinery itself does not normally ignite readily.
- Residual fuel vapors may create a flash hazard if tanks or lines are damaged.
- Hot machinery can cause burns and ignite nearby combustibles.
- Fire may produce irritating smoke from plastics, rubber, oils and coatings.
- Runoff may carry fuel, oil or coolant contamination.
- Do not assume unrelated asbestos, capacitor or polymeric-bead hazards unless present in the shipment.
Chemical Identity & Physical Properties
Solid mechanical equipment consisting of metal engine components, typically gray or black in color, may contain residual fuels, oils, or other operating fluids; transported as assembled or partially assembled units.
| Also known as | Internal combustion engineCombustion machineryEngine assemblyMotor unitICE machinery |
| Appearance | Solid mechanical equipment consisting of metal engine components, typically gray or black in color, may contain residual fuels, oils, or other operating fluids; transported as assembled or partially assembled units. |
| Flash Point | Not applicable (machinery article) |
| Boiling Point | Not applicable (machinery article) |
| Vapor Density | Not applicable (machinery article) |
| Water Reactivity | No significant reaction; water may be used for cooling hot machinery |
Fireground Response Guidance — UN 3530
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA where vapor, gas, dust, smoke or fire is present. Wear eye/face, hand and body protection suitable for the article or fuel.
Isolation & Evacuation
First Actions for a UN 3530 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Avoid breathing vapor, gas, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers, equipment, articles or spilled material without proper training and PPE.
- Prevent contaminated liquid, dust, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 171, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3530 — Machinery, internal combustionUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.