2. Introduction –
This standard lays down the minimum
requirement of fire protection facilities at
Petroleum Depots, Terminals, Pipeline
Installations.
The petroleum depots, terminals & pipeline/lube
oil installations are generally located in the remote
areas and near railway sidings. However, the
experience shows that with the passage of time,
these get surrounded by residential/industrial
installations. The inventory of flammable materials
stored therein necessitates inbuilt fire protection
facilities.
3. Fixed water spray system
FWSS is necessary on -
Class A product storage
Class A & B above ground storage, aggregate capacity above
1000kL and up to 5000kL
Floating Roof tank storing class A, Diameter up to 9m.
Class B above ground ST (Fixed or Floating) of diameter larger
than 30m.
When Class A & B placed in same dyke than Fixed water spray
system should be provided on all tanks.
(NOTE - Max distance b/w spray nozzle & tank shell is 0.6m.)
4. Clean Agent (Halon substitute) flooding system should be
provided for Control room, Office rooms, Computer rooms etc.
Clean Agent like Inert gas, Fluro ketone etc.
Maximum inter distance between hydrants/monitors should 30m
when measured aerially.
Fire Water demand based on-
Single largest fire (if total capacity is up to 30000kL)
Two largest Fire (If total capacity is more than 30000KL)
Not applicable on Class C or Excluded products.
5. Design Flow Rate
1. Water flow rate for cooling a tank -
Which on fire – 3 lpm/m²
Tanks within distance of (R+30)m from centre of tank on fire – 3
lpm/m²
Tanks outside (R+30)m – 1 lpm/m²
2. Different Considerations for -
Pump house shed for cross country pipeline – 10.2 lpm/m²
Tank Wagon loading gantry, Product pump house – 10.2
lpm/m²
Pump of Volatile products located under pipe rack – 20.4
lpm/m²
Supplementary streams shall based on 4 hydrants outlets,
each capacity of 36 m³/hr, (Total 144 m³/hr)
3. Minimum residual pressure should be 7 kg/cm², at
hydraulically remotest point in installation.
6. Storage
Effective capacity should for minimum of 4 hours of aggregate
rated capacity of pumps.
For capacity up to 30000 kL, where reliable water replenishment
@50% or more is available storage capacity can reduced to 3
hours.
For more than 30000 kL, where reliable water replenishment
@50% or more is available, The Single largest Fire Contingency
shall considered.
Reservoir shall be in two equal interconnected compartments.
In case of Steel Tanks, Two Tanks of 50% of required capacity
shall be there.
7. Fire Water Pumps
Incase of underground tanks, an overhead tank is required for
flooded suction & accounting leakages.
Pump shall be capable of discharging 150% of it’s rated
discharge at minimum of 65% rated head.
If 2 no. of main pumps, at least one stand-by pump should be
installed of same type & capacity for 3 it should 2 stand-by
pumps.
Fire Pumps should be diesel Engine driven, where main
electricity is reliable 50% can be electricity driven.
Each engine should have fuel capacity of 6 hours continuous
running.
Fire Pump installations have at least 30m distance to
Hydrocarbon storage or Potential leak source.
8. Jockey Pump & Fire line
Jockey Pumps –
Fire water network shall kept pressurized by jockey pumps.
Stand-by Jockey pump should provided.
Capacity should sufficient to maintain pressure in event of
leakage from valves etc.
Capacity should 5% min and max 10% of design fire rate.
There should auto cut-in/cut-off should provided.
Fire Water Network –
Steel pipe should above ground at height of at least 300mm
above or can be underground also.
9. Hydrants/Monitors
Maximum Inter-distance for–
a. High hazard Area – 30m
b. Non Hazardous Area – 45m
Distance b/w -
a. Tanks/Equipments & Hydrants min 15m from periphery of tank.
b. Distance b/w Monitors & Tanks/Equipments min 15m & max
45m.
10. Monitors (Water cum Foam)
Min 2 no. of fixed type HVLR monitors for eac tank farm
containing up to 10000kL capacity of class A product. (Monitors
should placed in opposite direction).
For more than 10000 kL of class A product, additional monitors
of having foam flow rate of 8.1 lpm/m², should installed such a
way each tank within coverage of 2 monitors.
For B & C class Products (in Tank Farm) min 1 no. of trolley
mounted mobile type W/F monitor.
TW/TT loading facilities should have alternative hydrant & W/F
monitor at a spacing of 30m on both sides of gantry.
Hydrant isolation valve situated at workable height of 1.2m
above ground.
11. Foam Conveying System
Types –
a. Fixed foam conveying system
b. Semi-fixed foam conveying system
c. Mobile foam conveying system
d. Sub-surface foam injection
e. Under the seal Foam Protection
For Fixed Roof Tank Protection –
Tank
Dia
(m)
18-20 20-25 25-30 30-35 35-40 40-45 45-50
Foam
Pourer
no.
2 3 4 5 6 8 10
12. Protection for Dyke area / Spill
Fire
Medium expansion foam generator for –
a. Class A tanks – 2 no. fixed for each tank dyke
b. Class B tanks – 2 no. portable for each location
Foam Application Rate for –
a. Cone roof containing HC products – 5 lpm/m²
b. Floating roof – 12 lpm/m²
c. Floating roof in case of roof sinking – 8.1 lpm/m²
Duration for Foam Discharge –
a. Tanks containing A & B – 65 minutes
b. Primariy spill fire protection – 30 minutes
13. Hoses & Nozzles
Hoses –
MOC – Reinforced rubber lined canvas or Non-percolating
Synthetic as per IS 636/UL 19.
Standard for – (a) length – 15m (b) diameter – 63mm
No. of hoses stored in Oil installation shall be 30% no. of
hydrants outlets.
In any case hoses shall not be less than 10.
Nozzle –
Types – Jet nozzle, Fog nozzle, Universal nozzle, Water curtain
nozzle, Jet Branch pipe & Fog Branch pipe.
Jet nozzle should be in each Hose box.
14. Fire Alarm System
Fire – 2 mins wailing sound.
Disaster – 2 mins wailing sound repeated thrice with gap of 10
secs.
All Clear – 2 mins straight run sound.
Test Run – 2 mins straight run sound.
15. Fire Protection system
Inspection & Maintenance
Pump –
Test Run – Twice a week for Half an hour.
Checking, Testing & Shut-off pressure observing once in 6 months.
Each pump run continuously 4 hours for test run, once a year.
If stand-by Jockey pump provided, Check it weekly.
Fire Water Ring Main –
Ring main should check for all leak once in 6 months.
Ring main line & it’s all accessories (Valves, hydrants, monitors etc)
should checked for (damage, corrosion, defects etc) every month.
Hoses – Once in 6 months, Hydraulically testing.
Siren – Once a week.
Extinguishers – as per OISD – 142.
16. Fire Protection system
Inspection & Maintenance
Fire Water Spray System –
Test for effectiveness & coverage once in 6 months.
Spray nozzle inspection for proper orientation, corrosion,
cleaning at least once a year (if necessary).
Strainers provided, shall be cleaned once in a quarter & logged.
Fixed/Semi-fixed foam system –
On Storage Tanks should be tested once in 6 months.
Clean Agent System –
Checked once every 6 months.
Fully inspected for proper orientation once every year.
17. Wheeled Fire Fighting
Equipments
Water cum Foam Monitors –
For tanks larger than 9m dia -
Foam Compound Trolley –
Capacity of 200/210 liters -
Size of Terminal W/F Monitors
Up to 1000 kL NIL
Up to 10,000 kL Min 2 no.s of 1000
GPM each
More than 10,000 kL More than 2 no.s of
1000 GPM each.
Tank Dia
(m)
Foam
Trolley
Up to 24 m 1 no.
24 to 30 m 2 no.
Above 30 m 3 no.
18. Fire Extinguishers
While selecting, these factors should be considered as flow rate,
discharge time, & throw in line as per IS 2190/UL 711.
While selecting DCP, due consideration as –
a. Apparent density (0.65 ±0.05)
b. Fire Rating (144B)
c. Thermal gravimetric analysis & Foam compatibility.
d. Siliconised Potassium Bicarbonate (IS4308)/ Mono Ammonium
Phosphate (IS4605) can also be used as DCP.
Spare CO2 cartridge & DCP refills, min 10% of total charge in
extinguishers should be maintained at location.
Sand buckets should round bottom & bottom handle, having 9 liters
water capacity (IS 2546) & free from oil, water & rubbish.
The max running distance to locate an extinguisher shall not exceed
15m.
Extinguisher’s top surface should not more than 1.5m above from
ground.
Rain protection should provided for Fire Extinguishers & Sand
19. Chemical Foam -
• Generally used in fire extinguishers.
• Most common ingredients as Sodium Bicarbonate & Aluminum
Sulphate with Stabilizer.
FIRE FIGHTING
FOAM
20. Foam types /
Parameters
Low Expansion Medium
Expansion
High Expansion
Expansion
ratio
Up to 50:1 Up to 51:1 to 500:1 Up to 501:1 to
1500:1
Produced by Self aspirating foam
branch pipes.
Self aspirating Foam
branch pipes with
nets.
Typically produced
by foam generators
with air fans.
Characteristic
s
More water & better
resistant to Fire
Poor Cooling, Poor
resistant to hot
surfaces / radiant
heat
Poor Cooling, Poor
resistant to hot
surfaces / radiant
heat
Usage Used in Oil refinery
and installations
Limited use in
controlling
Hydrocarbon liquid
fires.
Very limited use, but
used for protection
of hydrocarbon
gases stored under
cryogenic conditions
& for warehouse
22. Medium & High Expansion
Foams
Synthetic foam concentrate used with suitable
device.
This can be used on Hydrocarbon fuels of low
boiling point.
Foam is very light weight & gives poor cooling effect
compare to Low expansion foam.
Induction Rate in Water vary from 1.5 % to 3 %.
Many low expansion foam also used to produced
Medium/High Expansion foam.
These foams susceptible to easy breakdown by hot
fuel layers & radiant heat.