Smokejumpers South Africa.

08/05/2026

Key Types of Fire Extinguishers in the UK

Water Extinguishers (Red): Used for Class A fires involving solid materials like wood, paper, and textiles.

They work by cooling the material.

Foam Extinguishers (Cream): Suitable for Class A and Class B (flammable liquids like petrol or oil) fires. Dry Powder Extinguishers (Blue): Versatile "Multi-Purpose" (ABC) extinguishers effective on solids, liquids, and gases. Standard powder is not generally recommended for enclosed spaces due to inhalation risk and cleanup.

Extinguishers (Black): Designed for Electrical risks and Class B fires. They suffocate the fire without damaging electrical equipment or leaving residues.

Wet Chemical Extinguishers (Yellow): Specially designed for Class F fires, such as high-temperature cooking oils and fats in commercial kitchens.

Water Mist/Spray (Red/White): A specialized, eco-friendly extinguisher that uses microscopic water particles to fight fires, including Class F and electrical, by suffocating and cooling.

08/05/2026

⚠️Flashover (Fire Behavior)

Flashover is the sudden, full-room ignition that occurs when nearly all combustible materials in a compartment reach their ignition temperature and ignite almost simultaneously.

It is a transition phase between the growth and fully developed stages of a fire.

🔥 How Flashover Happens

Flashover occurs when heat, smoke, and gases accumulate inside an enclosed space during a fire.
Here’s the process step by step:
1. Initial Fire Growth
• A fire starts in one area and begins heating nearby surfaces.
• Hot gases rise and collect near the ceiling, forming a thermal layer.
2. Heat Build-up
• Radiant heat from the upper gas layer increases the temperature of all surfaces below.
• Even objects not in direct contact with flames begin to pyrolyze—release flammable vapors due to heat.
3. Critical Temperature Reached
• When the upper gas layer temperature reaches around 500–600°C (932–1112°F),
radiant feedback becomes so intense that everything ignites nearly at once.
4. Full-room Ignition
• The room “flashes over” — flames suddenly erupt across all surfaces.
• Visibility drops to zero, and survival for anyone inside becomes impossible without full PPE and rapid egress.

Firefighter Awareness
• Warning Signs of Impending Flashover:
• Rollover (flames curling in the smoke layer)
• Rapid heat increase
• Dense, dark smoke pushing with high velocity
• Lowering neutral plane
• Prevention / Delay Tactics:
• Gas cooling using short, controlled bursts of water fog
• Proper ventilation to release heat and gases
• Staying low and monitoring smoke behavior.

21/04/2026

🔥 THE 10 PHASES OF FIRE OPERATIONS 🔥
Firefighting isn’t random — it’s a system.

Every fire incident follows a clear operational priority. These phases guide firefighters in making safe, effective, and life-saving decisions on the fireground. While some steps may happen at the same time, understanding the order helps ensure nothing critical is missed.

Here’s a simple breakdown:

1️⃣ Pre-Fire Planning
Knowing the building before a fire happens — hazards, exits, and access points — saves time and lives.

2️⃣ Size-Up (Scene Size-Up)
The Incident Commander quickly evaluates conditions: fire behavior, structure, life hazard, weather, and resources.

3️⃣ Rescue
Life safety comes first. Locate, stabilize, and remove victims from danger whenever possible.

4️⃣ Cover Exposure
Protect nearby buildings and uninvolved areas from heat, flames, and embers to stop fire spread.

5️⃣ Confinement
Keep the fire contained to a limited area to prevent it from growing bigger and more dangerous.

6️⃣ Ventilation
Remove heat, smoke, and toxic gases to improve visibility, reduce fire intensity, and support crews inside.

7️⃣ Extinguishment
Apply the right tactics and water or agents to knock down the main body of fire.

8️⃣ Salvage
Protect property from unnecessary damage and reduce overall loss after the fire is controlled.

9️⃣ Overhaul
Search for hidden fire, hot spots, and embers to prevent rekindling.

🔟 Post-Fire Analysis / Critique
Review what happened, learn from the operation, and improve future responses.

🚒 Remember:
Fireground operations are dynamic. Some phases overlap, but life safety, incident stabilization, and property conservation remain the foundation of every response.

🔥 Train with purpose. Operate with discipline. Protect lives and property.

09/04/2026

*Liquid Penetrant Testing - PT* 🔍

- *Clean*: Remove dirt, oil, paint
- *Apply*: Spray red dye. Wait 10-30 min
- *Remove*: Wipe excess. Don’t over clean
- *Develop*: Spray white developer
- *Check*: Cracks show red lines
- *Clean*: Remove all after test

- *Use*: Find surface cracks only
- *Limit*: Not for porous parts

09/04/2026

🔥 KNOW THIS ABOUT YOUR SOLAR SETUP

With today’s high temperatures, solar power is helpful—
but a wrong setup can lead to fire.

⚠️ Most incidents are not random.
They are caused by heat buildup, poor wiring, and improper system configuration.

🚨 COMMON FIRE RISKS

❌ Mixing different panels or ratings
Different voltage and wattage can overload the system
➡️ Leads to overheating and equipment failure

❌ Exceeding input limits (MPPT / power station)
Too much voltage places stress on components
➡️ Can cause overheating or internal damage

❌ Undersized wires
Smaller wires have higher electrical resistance
➡️ Heat builds up → insulation can melt → possible fire

❌ Lack of overcharge protection
Some low-quality units do not regulate charging properly
➡️ Battery overheating increases fire risk

❌ Loose or exposed wiring
Poor connections can create arcing and excessive heat
➡️ A single spark can start a fire

❌ Poor ventilation
Charging systems naturally generate heat
➡️ Trapped heat leads to overheating hazards

⚠️ FIRE SAFETY REMINDER

🔥 Electricity + Heat = Fire Risk

👉 Always:
✔ Use the correct wire size
✔ Follow manufacturer voltage limits
✔ Use quality, certified equipment
✔ Keep connections tight and properly insulated
✔ Ensure proper ventilation

A system that “works” is not always safe.
👉 Proper setup prevents overheating
👉 Proper setup prevents fire

31/03/2026

Big Shift in Fire Safety Standards

Lithium-ion battery fires are no longer an afterthought.

With the publication of ISO 3941:2026, a new dedicated fire classification — Class L — is now official, finally acknowledging the unique behaviour of lithium-ion battery fires, including thermal runaway, intense heat, and toxic by-products.

This is a major step toward application-specific fire protection, moving beyond legacy Class A/B assumptions.

If your organization manufactures, stores, charges, transports, or manages lithium-ion batteries, now is the time to:
✔ Review fire risk assessments
✔ Re-evaluate extinguisher selection
✔ Update emergency response plans

Fire safety is evolving — and Class L is the future.

31/03/2026

🔥 KNOW YOUR FIRE CLASSES

Not all fires are the same—
and using the wrong extinguisher can make things worse.

At home, most fires start small…
but they grow fast if not handled properly.

That’s why understanding fire classes matters:

🧯 Class A – Wood, paper, cloth
💧 Best controlled by cooling

🧯 Class B – Fuel, oil, flammable liquids
🛑 Controlled by smothering

🧯 Class C – Electrical equipment
⚠️ Use non-conductive agents (never water)

🧯 Class D – Combustible metals
🔧 Requires specialized extinguishers

🧯 Class K – Cooking oil & grease
🍳 Use wet chemical extinguishers

💡 Fire extinguishers work by removing one or more elements of fire:
Heat • Fuel • Oxygen

🚒 Firefighters don’t just fight fires—
they understand fire behavior.

And the right knowledge can protect your home and your family.

26/03/2026

26/03/2026

In order to describe, make a selection or receive a machine gun network, we must check how much information you have:

1) List of approval :

Credits obtained by the machine gun

Whether UL, FM ...

We can check the model number on the machine gun by logging it on to the authorized authority's website.

2) Temperature Rating :

The temperature at which the sprinkler is opened is known from the color code of the glass bulb and varies according to the maximum temperature of the space in which the sprinkler is located.

Ex:

Max Temp Ceiling 38°

Temp Rating 68°

3) Thermal sensitivity:

Which is the sensitivity of the sprayer to heat and the time it takes to open when the temperature of the place reaches the temperature rating of the sprayer, which we know from the thickness of the glass bulb

3 mm - Quick response (QR)

5 mm - Standard response (SR)

4) k- Factor:

The coefficient expresses the or***ce size therefore the amount of water that will come out of the sprinkler

Ex: K factor (5.6)

or***ce size (.5")

(NFPA 13, Ch A.7.2.2.1)

5) Pressure Rating :

the pressure at which the machine gun works

Range 0.5 bar: 12.1 bar