Truck & Rail Gantry
Foam and water spray over loading bays, with detection at the arms.
At a glance
- Hazard family
- Transfer & loading
- Protected by
- Foam, Water spray, Hydrant, Water curtain, Gas detection, Flame detection
- Designed to
- NFPA 16, NFPA 11, OISD‑STD‑117
- Foam-water discharge density
- 6.5 L/min/m² over the protected area
Design basis
- Foam-water discharge density
- 6.5 L/min/m² over the protected areaNFPA 16
- Foam concentrate supply
- At least 10 minutes at the design dischargeNFPA 16
Standards that apply
- NFPA 16Foam-water sprinkler and foam-water spray systems.
- NFPA 11Low-, medium- and high-expansion foam.
- OISD-STD-117Fire protection for petroleum depots and terminals.
The risk
Loading is where product is handled most: arms and hoses connect and disconnect, vehicles bring their own ignition sources, and an overfill or a failed coupling puts product on the ground under the vehicle.
A fire at a gantry spreads to the vehicle, the next bay and the gantry structure, and can close the terminal’s dispatch until it is rebuilt.
The scheme
Cover every bay from above and below, and detect at the loading point:
- Foam-water deluge over each bay, with nozzles low enough to reach under the vehicle.
- Gas detection at the loading points, and flame detection to release the deluge.
- Monitors at the ends of the gantry, and hydrants within reach of every bay.
- Water curtains where bays or neighbouring plant need separating.
Systems that apply
NFPA 11Foam Based Fire Fighting System
Bladder tanks, pourers and makers for tank farms, bund areas and loading gantries.
NFPA 15Fire Water Spray System
Medium and high velocity spray for vessels, transformers and process equipment.
NFPA 24Fire Hydrant System
Plant-wide ring main, hydrants, monitors and hose boxes, sized to the site.
NFPA 15Water Curtain System
Separation and exposure protection where spacing alone is not enough.
IEC 60079-29Gas Detection System
Flammable and toxic gas detection for process areas, with alarm and shutdown.
EN 54-10Flame Detection System
Optical flame detection for open process areas, fast enough to release deluge.
Products used
Deluge Valves & Systems · 9
Deluge Valve Cast Carbon Steel (Model PD-CS)
Cast carbon steel, 80 to 200 mm, 250 psi
Deluge Valve Cast Stainless Steel (Model PD-SS)
Cast stainless steel, 80 to 200 mm, 250 psi
Deluge Valve Aluminium Bronze (Model PD-AB)
Aluminium bronze, 80 to 200 mm, 250 psi
Deluge Valve Skid Cabinet
Pre-assembled and factory tested, with bypass
Deluge Valve Cast Carbon Steel (Model PD-ILV)
Inline globe pattern, cast carbon steel
Deluge Valve Aluminium Bronze (Model PD-ILVAB)
Inline globe pattern, aluminium bronze
Deluge Valve Cast Stainless Steel (Model PD-ILVS)
Inline globe pattern, cast stainless steel
Deluge Valve
Dry pilot, wet pilot and electric release
Wet Pilot Inline Deluge Assembly (Stainless Steel)
PD-ILVS with wet pilot trim, 80 to 200 mm
Foam Equipment · 12
Foam Bladder Tank Horizontal with Ratio Controller
Horizontal, 1,000 to 15,000 litres
Foam Bladder Tank Vertical with Ratio Controller
Vertical, 200 to 7,500 litres
Foam Concentrate Tank
Atmospheric, horizontal, 200 to 10,000 litres
Foam Mixer (For fixed roof tank)
Fixed roof tanks, glass vapour seal, 50 to 150 NB
Foam Pourer Cone Roof Tank
For cone roof tanks, fixed orifice plate
Foam Pourer Floating Roof Tank
For floating roof tanks, 50 to 80 NB inlet
HOV (Hydraulically Operated Valve)
Auto open, manual close, 40 and 50 NB
Foam Inductor
Inline, 3% or 6% induction, 50 to 200 NB
Foam Nozzle
Air-aspirating, upright and pendent, K-3.0
Foam Maker (For Floating Roof Tank)
For floating roof tanks, 50 to 80 NB inlet
Foam Pourer
Fixed roof tank application, with vapour seal
Foam Bladder Tank with Ratio Controller
Vertical 200 to 7,500 L, horizontal 1,000 to 15,000 L
Spray Nozzles · 4
Sprinkler Foam-Water
Air-aspirating, upright and pendent, K-3.0
MVWS Nozzle Stainless Steel
Stainless steel 316, K-18 to K-102, 65° to 160°
MVWS Nozzle Brass
Brass, K-18 to K-102, 65° to 160°
MVWS Nozzle
Brass or stainless steel 316, K-18 to K-102
Strainers · 6
Fabricated Duplex Strainer
Twin baskets, cleaned without shutting down
Fabricated Basket Strainer
Top-removal basket, 2" to 24"
Fabricated Y Strainer
1" to 24", ASME Class 150 to 2500
Fabricated Tee Strainer
Graded filtration, 2" to 24", ASME 150 to 600
Fabricated Inline Strainer
Inline, 15 to 150 mm, 40 to 100 mesh
Strainer
Y-type, 1" to 24", threaded, socket weld or flanged
Questions we are asked
Why foam-water rather than plain water at a gantry?
A gantry fire is usually a spill of flammable liquid under or around the vehicle. Foam-water puts a foam blanket on the spill; plain water would spread it.
How is the area under the vehicle covered?
With low-level nozzles or monitors, because overhead nozzles cannot reach beneath the tanker.
What releases the system?
Flame or heat detection, or a manual release at the gantry. Gas detection at the loading points raises the alarm before anything ignites.
Related hazards
Projects on this hazard
- Photography to followIOTL
Foam system — IOTL
Foam based fire fighting system for IOTL at Vadinar. · Vadinar
- Photography to followAirports Authority of India
Foam system — Airports Authority of India
Foam based fire fighting system for Airports Authority of India at Kolkata. · Kolkata
- Photography to followTata Cummins
High velocity water spray system — Tata Cummins
High velocity water spray (HVWS) system for Tata Cummins at Jamshedpur. · Jamshedpur
- Photography to followTata Steel
Medium velocity water spray system — Tata Steel
Medium velocity water spray (MVWS) system for Tata Steel at Joda Mine. · Joda Mine
- Photography to followGAIL
Hydrant system — GAIL
Fire hydrant system for GAIL at Vijaipur. · Vijaipur
- Photography to followTISCO
Hydrant system — TISCO
Fire hydrant system for TISCO at Noamundi. · Noamundi
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