UN 0124 — Jet perforating guns, charged, oil well, without detonator
Placard: Explosive 1.1D. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0124 is Jet perforating guns, charged, oil well, without detonator, a Class 1.1D explosive entry assigned to ERG Guide 112. It presents a projection and fragmentation hazard where standoff distance, isolation and specialist explosive support are the main responder priorities.
Hazard overview: UN 0124 presents a severe projection and fragmentation hazard rather than a simple fire problem. Initiation may produce blast overpressure near the source and throw fragments, burning articles or directed effects over a wide area. Heat, shock, impact or electrical energy can make the article more dangerous.
Response guidance: For a UN 0124 incident, responders should confirm the material using shipping papers, placards, package markings, SDS where applicable and ERG Guide 112. Establish incident command, isolate the area, deny entry, request law enforcement and EOD support, and withdraw personnel if fire involves the explosive material or containers.
Firefighter training notes: Training should emphasize recognizing Class 1 explosive placards, establishing command early, using standoff distance, denying entry and requesting bomb squad or EOD support. Common tactical errors include approaching packages for identification, moving damaged items, fighting fire too close and underestimating fragmentation distance. Use ERG 112, shipping papers and local explosive incident SOP.
Regulatory context: Jet perforating guns, charged, oil well, without detonator is regulated as a Class 1 explosive hazardous material. Transportation, storage, quantity limits, fire code controls and reporting requirements may vary by jurisdiction. Responders should verify current requirements through shipping papers, SDS or product documents and applicable DOT, ATF, OSHA, NFPA, military, state or local authority guidance.
Storage & handling: Jet perforating guns, charged, oil well, without detonator should be stored only in approved packaging, magazines or authorized explosive storage areas, separated from ignition sources, incompatible materials and unauthorized access. Packages should be protected from heat, impact, friction, moisture where relevant and physical damage according to product documentation and applicable explosive storage regulations.
UN 0124 Quick Details
Common Hazards of UN 0124
- Projection and fragmentation hazard; explosive articles may throw fragments, debris or directed effects if initiated.
- Blast overpressure may be severe near the involved articles.
- Heat, shock, impact, friction or electrical energy may increase initiation risk depending on the device.
- Fire involvement may cause violent rupture, projection or detonation of individual articles.
- Nearby explosive articles or charges may be initiated if stored or transported together.
- Smoke from fire may contain irritating or toxic combustion products.
Chemical Identity & Physical Properties
Metal cylindrical assemblies containing multiple shaped explosive charges arranged in a tubular carrier. Typically steel construction with explosive-filled conical liners designed to penetrate well casing and formation rock.
| Also known as | Shaped charge perforating gunsOil well perforatorsWireline perforating chargesWell completion explosivesDownhole shaped charges |
| Appearance | Metal cylindrical assemblies containing multiple shaped explosive charges arranged in a tubular carrier. Typically steel construction with explosive-filled conical liners designed to penetrate well casing and formation rock. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (solid explosive device) |
| Water Reactivity | No significant reaction with water, but moisture may degrade explosive performance over time |
Fireground Response Guidance — UN 0124
Extinguishing Media
PPE Requirements
For UN 0124, distance, cover and evacuation are more important than close-range PPE. Structural firefighting gear and SCBA may be used only for remote exposure protection or support roles; direct approach or handling should be limited to qualified EOD or explosive specialists under incident command.
Isolation & Evacuation
First Actions for a UN 0124 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away and deny entry to the hazard area.
- Stage responders upwind, uphill and outside the recommended isolation distance.
- Request law enforcement, bomb squad or EOD, hazmat and additional command resources immediately.
- Do not handle, move or disturb explosive articles unless directed by qualified explosive ordnance personnel.
- Do not fight fire involving explosives at close range; withdraw and protect life safety first.
- Protect exposures only from a safe, remote position if directed by incident command and local SOP.
- Use ERG Guide 112, shipping papers and incident command to set isolation and evacuation distances.
📋 Copy & Share Field Card
UN 0124 — Jet perforating guns, charged, oil well,Use 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.