GM(Retai l ) N/E/w/SDGM (Retail) NCZ /NWZ / SCz

Headquarters' OfficeHindustan Bhaval

November 19, 2OlO

o&D/HCM/Ops

Amendment to OISD 117

This is further to our letter O&D/HCM/Ops dated 29.O9.2O1O wherein we hadcommunicated to you the decisions ta-ken by Safety Council with regards to Amendment inOISD I 17 (Fire Protection Facilities for Petroleum Depots, Terminals, Pipeline Installationsand Lube Oil Installations). OISD has now frnalised tJle standard for implementation a-ndcopy of the same is enclosed herewitlt.

We wish to highlight two aspects in the revised code which are as under ;

lU Brplanatory note for Implementation :Annexure M has been introduced in the OISD 117 which gives time frame forimplementation of various facilities for existing locations and new locations.

l2l Sample calculation of fire water flow rate :Annexure I gives the basis for designing fire water system in the installation. It ispertinent to note here that fire water requirement for supplementary hoses has

increased as indicated in the tableSr.No. Description oIsD 117

Pre-Revlsed Revised1. Water for 4 sinele hydrant streams @ 36 Cu.m./hr. r44 t442. Water for 1 no. monitor stream @ I44 Cw.rn. /hr.

Capacitv144 NIL

Water for 2 monitor streams @ 228 Ctt.rn. /hr. NIL 456Total 288 600

In view of the above, water requirement at all the existing depots & terminals (even wheredouble fre contingency is not applicable) will fall short of the requirement. Therefore, pleaseundertake exercise to calculate the revised water requirement for all locations and proposeNPCB projects for meeting the shortfall.

C&MD, PH-6ED - (Retail), HB-4ED _ (LPG) HB 3ED - (P&P) HB 2GM (Special Projects) Chennai (PR)GM-HR (Mktg.),HB-3GM-SHE. PH Annexe-SDGM-(O&D) NZ I Ez lwz I szCh.Manager (O&D) NWZ I NCZ I SCzCh. / Sr. Manager (SHE) ZonesAl1 Depot / Terminal In-chargesSRMs- AI1 Retail ROs

cccccc

cc

cccc

cc

cc

Annexure-Vl

Explanatorv Note f or Implementation

Clause 4.2. Design Criteria for fire protection system &Clause 4.3.2r Basis: Fire water system

i. For exiting terminals this shall be provided progressively within a period ol 4years from the issuance of the standard.

ii, For new/upcoming locations it shall be implemented with immediate effect.

Clause 4.2.12,4.4.4

Automatic actuated rim seal fire detection and extinguishing system shall beprovided on all external floating roof tanks storing Class A petroleum.

i. The rim seal protection system shall be implemented in all existing installationsprogressively wilhin 24 months for class A floating roof tanks above 5000 KLcapacity & balance class A floaling root tanks progressively in 36 months fromthe date of issuance of the standard.

ii. Installation of rim seal system shall be done for all newupcoming externalfloating roof tanks storing Class A petroleum storage tanks with immediateeffect.

iii. The automatic actuated rim seal fire detection & extinguishing system alreadyprovided in existing tanks shall be replaced with linear heat hollow metallic tubetype detectors with foam based extinguishing media whenever the existingsystem is due for replacement or shall be replaced within a period of 4 yearsfrom the day of instatlation whichever is earlier.

Clause: 4.2.13 Sprinkler system for Lube oil drums:

i. Shall be provided within 12 months from the issuance of the amended standard forexisting locaiions.

ii. For new/upcoming location this shall be implemented with immediate effect.

Clause: 4.3.5 (x) Fire Water Pumps

i. Shall be progressively implemented within 24 months from the issuance of theStandard for existing locations.

ii. For neMupcoming locations it shall be implemented with immediate effect.

Clause 4.3.7 (vi) Hydrants & Monitors:

i. Shall be provided progressively within 24 months from the issuance of the Standardfor existing tank farms.

ii. Installation of monitors for all new/upcoming tanks shall be done along-withcommissioning of the tanks.

"oISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ GuidelineV Recommended practices.,'

Glause 4.4.7: PROTECTION FOR DYKE AREA/SPILL FIRE

i. Medium expansion foam generators shall be provided progressively within 18months from the issuance of the standard lor existing locations.

ii. For new/upcoming location it shall be implemented with immediate eflect.

Clause 4.6.3 (iii) Accessories:

i. Emergency Kit with the items mentioned in Annexure-Vll shall be providedprogressively within 24 months from the issuance of the amended standard forexisting locations.

ii. For new/upcoming locations it shall be implemented with immediate effect.

Clause:5.3 DETECTION AND ALARM SYSTEM

i. Hydrocarbon Detectors shall be provided progressively within 24 months from theissuance of the Standard lor existing locations.

ii. For new/upcoming locations it shall be implemented with immediate effect.

Clause 6.2 (i) Training:

Training by oil Industry approved reputed institute shall start wilhin next 6 months.

Clause 6.2 (iv) Full activation of shut down system during mock drill:

Shall be implemenled With immediate effect.

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD StandardV GuidelineV Recommended Practices. "

ANNEXURE- I

SAMPLE CALCULATION OF FIRE WATER FLOW RATE(Clause 4.3.2 to be applicable)

1. DESIGN BASIS

The fire water system in an installation shall be designed to meet:

i) The fire water flow requirement of fighting single largest fire contingencies forlocations where total aggregated storage capacity in the location is less than30,000K1

ii) The fire water flow requirement of fighting trivo largest fire contingenciessimultaneously for all locations where total aggregated storage capacity in theterminal is more than 30,000 KL.

2. FIRE WATER DEMAND FOR SINGLE LARGEST FIRE(For locations with aggregate storage capacity less than 30000KL)

Consider various areas under fire and calculate fire water demand for each area basedon design basis as indicated below, however, actual tank dimensions available in theterminal shall be considered.

2.1 FIRE WATER FLOW RATE FOR FLOATING ROOF TANK PROTECTION

DataTotal storage capacity in one dyke area = 20,000 m3.No. of tanksCapacity of each tankDiameter of each tankHeight of each tank

. a) Cooling water flow rate

=2.= 10,000 m3.= 30 m.= 14.4 m.

(i) Cooling water required for tank on fireCooling water rate = 3 lpm/m2 of tank area for tank on fire.Cooling water required = 3.142x 30 m x 14.4 m x 3lpm/m2.

= 4070 tpm.= 4070 x 60 m3/hr = 244 m3lhJ.

1000Assumlng that second tank is also located within the same tank dyke at a distancemore than 30 m from the tanks shell. Therefore, in such case cooling required is at therate of I lom/mz of tank shell area.

(ii) Cooling water requiled for tank talling beyond (R+30) from centre of tank on lire

Cooling water rate = 1 lpm/mz of tank area.Cooling water required = 3j42x 30 m x 14.4 m x llpm/mz.

= 1957 tpm.= 1357 x 60 ms/hr = 81.33 m3/hr.

29"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from use

of the OISD Standards/ Guidelines/ Recommended Practices."

1000= 81 m3/ hr

Total Water required for cooling ot tanks (item i + ii) = 244+81 = 325 m3/ hr

b) Foam water tlow rateWater flow required for applying foam on a largest tank burning surface area (rim sealarea)For floating root tank ol 30 M diameter,Diameter ol the tank (D1) = 30MDistance of foam dam from shell = 0.8MDiameter of roof up to foam dam (D2) = 30 - (2X0.8) = 28.aRim seal area = (rT /4) x (302-z}.42l

= (n t4\ x 125.44= 93.4 m2

Foam solution rate @ 12 lpm/ m'? = 1120.8 lpm= 1120 lDm.

Foam water r6quired = 0.97 x 1120 lpm(For 3% foam concentrate) = 1086.41pm.

= 1086.4 x 60 m3/hr1000

= 65.2 m3/hr.say 65 m3/hl

c) Water Requirement for supplementary Hose:

Water for 4 single hydrant streams = 4 x 36 = 144 m3/hr.Water for 2 monitor stream (HVLR) = 2x 228 = 456 m3lht.Total water reouirement = 600 m3 / hr.

Total water flow rate (item a + item b) lor floating roof tank prolectlon:

(i) Tank cooling = 325 m3/hr.(ii) Foam solution application = 69 m3/hr.(iii) Supplementary hose requirement = 600 m3/ hl

Total (item i + ii +iii) = 994 m3/hr.

2.2 FIREWATER FLOW RATE FOR CONE ROOFTANK PROTECTION

DataTotal storage capacity in one dyke area = 30,000 m3.No. of tanksCapacity of each tankDiameter ol each tankHeight of each tank

a) Cooling water tlow rate

= 7,500 m3.= 28.5 m.= 12 m.

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD StandardV Guidelines/ Recommended Practices."

(i) Cooling water required tor tank on lire= 3 lom/mz of tank area for tank on fire.= 3.142x 28.5 m x 12 m x3lpm/m2.= 32221pm.= 3222 x 6O m3/hr = 193.32 m3/hr.

1000= 193 m3/ hr

Assuming that other three tanks are also located within the same tank dyke at adistance less than 30 m from the tanks shell. Therefore, in such case cooling requiredis at the rate of 3 lpm/mz of tank shell area.

(ii) Cooling water required for tanks falling within (R+30) from centre ol tank on fireCooling water rate = 3 lpm/m' of tank area.Cooling water required = 3x 9142 x 28.5 m x 12 m x 3lpm/m2

= 9465 lom.= 9465 x 60 m3/hr = 568 m3/hr.

1000Total cooling water required (item i+ ii) = 193+568

= 761 m3/hr.

b) Foam water flow raleFoam solution application rate = 5 lpm/m2 of liquid surface area.Foam solution required = 3.142 x (28.5 m), x 5 lpm/m".

.+= 3188 lpm.

Foam water required = 0.97 x 3188 lpm = 3092 lpm.(For 3% foam concentrate) = 3092 x 60 m3/hr

1000= 185 m3/hr.

c) Water Requirement tor supplementary Hose:

Water for 4 single hydrant streams = 4x 36 = 144 m3/hr.Water for 2 monitor stream(HvlR) = 2x 228 = 456 m3/hr.Total water requirement = 600 m3/ hr.

Total water tlow rate (item a + b + c) lor cone roof tank protection:

(a)Tank cooling = 751 m3/hr.(b)Foam solution application = 185 ms/hr.(c)Supplementary hose requirement = 600 m3/ hr

Total = 1546 m3/hr.

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ Cuidelines/ Recommended Practices."

Cooling water ratecooling water required

3l

2.3 FIRE WATER FLOW RATE FOR COOLING POL TANK WAGON LOADING GANTRY

Data

Total No. ot loading points = 72 Conventional or48 BTPN.No. of loading points on each side = 24 Nos.Width of tank wagon gantry = 12 m.(Cooling two spur)

a) Cooling water flow rate

Divide total area of gantry into 24 segments, each segment measuring 15 m x.12 m and consider 3 segments operating at a time.

Water rate required = 3x15mx12mx10.2 lpm/m'?.= o+10

= 385 m3/hr

b) Water Requlrement lor supplementary Hose:Water for 4 single hydrant streams = 4 x 36 = 144 m3/hr.Water for 1 monitor stream(HvlR) = 1x 228 = 228 m3lhr.Total water requirement = 372 ms / hr.

Total water flow rate (item a + b) for gantry protection:

(a) Gantry cooling = 385 m3/hr.(b) Supplementary hose requirement = 372m3/ hl

Totaf = 757 m3lhr.

2.3 TOTAL DESIGN FIRE WATER FLOW RATE FOR SINGLE FIRE CONTEGENCYThe total fire water llow requirement will be highest of one of the fire water requirementcalculated in 2.1 (994 msthr) &?.2 (1546 m3/h0 &2.3 (757 m3/hr) above i.e. 1546 m3/ hr.

WATER STORAGE REOUIREMENT

1546 me/hr X 4 hrs. storage = 6184 m3

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ GuidelineV Recommended Practices."

3.0 FIRE WATER DEMAND FOR TWO MAJOR FIRES SIMULTANEOUSLY(For locations with aggregate storage capacity more than 30000KL)

Consider various areas under fire and calculate fire water demand for each area basedon design basis as indicated below, however, actual tank dimensions available in theterminal shall be considered.

3.1 FIRE WATER FLOW RATE FOR FLOATING ROOF TANK PROTECTION

Data

Total storage capacity in one dyke area = 32,000 ms.No. of tanksCapacity of each tankDiameter of each tankHeight of each tank

=2.= 16,000 m3.= 40 m.= 14.4 m.

a) Cooling water tlow rate(i) Cooling water required for tank on fire

Cooling water rate = 3 lpm/m2 of tank area tor tank on f ire.Cool ing water required = 3.142x40mx14.4mx3lpm/m2.

= 5426 tpm.= 5426 x 60 ms/hr

1 000= 326 m3/hr

Assuming that second tank is also located within the same tank dyke at a distancemore than 30 m from the tanks shell. Therefore, in such case cooling required is atthe rate of 1 lpm/m2 of tank shell area.

(ii) Cooling water required for tank lalling beyond (R+30) fiom centre ot tank on fireCooling water rate = 1 lpm/mz of tank area.Cooling water required = 3.142 x 40 m x 14.4 m x l lpm/m2.

= 1809 tpm.= 1809 x 60 m3/hr

1000= | 09 m3ihr.

Total tire water requirement for cooling of tanks (item i + ii)= 326+109= 435 m"/ hr

b) Foam waler flow rateWater flow required lor applying foam on a largest tank burning surface area (rim sealarea)For floating roof tank of 40 M diameter,Diameter of the tank (D1) = 40MDistance of foam dam from shell = 0.8MDiameter of roof up to foam dam (D2) = 40 - (2X0.8) = 38.4Rim seal area = (n l4l x (402-38.42)

= (n l4l x 125.44= 98.5 m2

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ Guidelines/ Recommended practices."

Foam solution rate @ 12 lpm/ m' = 1 182 lpmFoam water required = 1 182 lpm.(For 3% foam concentrate) = 0.97 x 1 182 lpm

= 11471Dm.

= 1147 x 60 m3lhl1000

= 68.8 m3/hr.

say 69 m3/hrc) Water Requirement for supplementary Hose:

Water for 4 single hydranl streams = 4 x 36 = 144 m3lhr.Water for 2 monitor stream(HvlR) = 2x 228 = 456 m3/hr.Total water requirement = 600 m3 / hr.

Total water flow rate (item a + b+ c) for lloaling roof tank proteclionTank cooling = 435 m3/hr.Foam solution application = 69 m3/hr.Fire water requirementfor supplementary hoses Total = 600 m'/ hr

Total water requirement = 1104 m3/hr.

3,2 FIREWATER FLOW RATE FOR CONE ROOFTANK PROTECTION

DataTotal storage capacity in one dyke area = 50,000 m3.No. of tanksCapacity of each tankDiameter of each tankHeight of each tank

a) Cooling waler flow rate

=4.= 12,500 m3.

= 37.5 m.= 12m.

(i) Cooling water required for tank on fireCooling water rate = 3 lpm/m2 of tank area for tank on fire.Cooling water required = 3.142 x 37.5 m x 12 m x 3lpm/m2.

= 4242 tpm.= 4242 x 60 m3/hr = 255 m3/hr.

1000Assuming that other three tanks are also located within the same tank dyke at adistance less than 30 m from the tanks shell. Therelore, in such case cooling requiredis at the rate of 3 lpm/m2 of tank shell area.

(ii) Cooling water required tor tanks falling within (R+30) from centre of tank on lhe.Cooling water rate = 3 lpm/m' of tank area.Cooling water required = 3.142x 37.5 m x tz m x3lpm/m'zi 3.

34'OISD her"by expressly disclaims any liability or responsibility for loss or damage resulting from use

of the OISD Standards/ Guidelines/ Recommended Practices"'

= 12726lom.= 12726 x 60 m3/hr = 764 m3/hr.

1000

Total cooling water required(item i +ii) for cone roof tank protection= 1019mt/hr,

b) Foam water flow rateFoam solution application rate = 5 lpm/m2 of liquid surface are-a.Foam solution required = 3.142 x (18.75 m)z 1 $ 1p676'.

= 5523 tpm.Foam water required = 0.97 x 5523 lpm = 5357 lpm.(For 3% foam concentrate) = 5357 x 60 m3/hr

1000Total Foam water required = 321 ms/hr.

c) Water Requirement for supplementary Hose:

Water for 4 single hydrant streams = 4 x 36 = 144 m3lht.'Water for 2 monitor stream(HVlR) = 2x 228 = 456 m3lht.Total water requirement = 600 msi hr.

Total water flow rate (item a + b + c) for cone roof tank protection

Tank cooling = 1019 m3/hr.Foam solution application = 321 m3lht.Total Water reouirement for = 600 m3rnrSupplementary hose

Total = 1940 m3/hr.

3.3 FIREWATER FLOW RATE FOR COOLING POLTANKWAGON LOADING GANTRY

a) Data

Total No. of loading points = 72 Conventional or48 BTPN.No. of loading points on each side = 24 Nos.Width of tank wagon gantry = 12 m.(Cooling two spu0

b) Cooling water f low rate

Divide total area of gantry into 24 segments, each segment measuring 15 m X 12 m andconsider 3 segments operating at a time.

Water rate required= 6426= 385 m3/hr

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ Guidelines/ Recommended Practices."

= 3 x 15 m x 12 m x 10.2 lpm/m'?.

c) Water Requirement for supplementary Hose:Water for 4 single hydrant streams = 4 x 36 = 144 m'/hr.Water for 1 monitor stream (HVLR) = 1x 228 = 228 m3lht.Totaf water requirement = 372 m3t hr.

Total water flow rate for gantry protection

(a) Gantry cooling = 385 m3/hr.(b) Supplementary hose requirement = 372 m3l h(

Totaf = 757 m3lhr.

3.4 TOTAL DESIGN FIRE WATER FLOW RATE

= (1940+1104) m3/hr= 3044 m3/hr

= 3044 m3/hr

Fire water rates {or above 3 cases are given below:

i) Floating rool tank protection = 1104 m3/hrii) Cone roof tank protection = 1940 m3/hriii) Tank wagon Loading Gantry = 757 mslhl

For fighting the two major tires simultaneously, the design firewater rate is the sum of thetwo highest water rates i.e.

Design fire water rate

Design fire water lale

3.5 FIRE WATER STORAGE REQUIREMENT:

Case 1 : When make water is not available:

Fire water storage required (4 hrs) = 4X3044= 12176 m3

Case-2: When 50o/o make up is available (consider single largest fire)

Fire water storage requirement =1940 X ̂ 4= 7760 m"

- - - ) 0x0(---

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof rhe OISD Srandards/ Guidelines/ Recommended Practices."

36

Fire water calculation for full surlace fire on largest floating roof tank (roolsinking case)

Data:

Total storage capacity in one dyke area= 32000 m3No. of tanks = 2Capacity of each tank = 16,000 m'Diameter ot each tank = 40 MHeighl of each tank = 14.4 M

b) cooling water requirement:Cooling water rate @ 3 lpm/ m'zof tank shell area for tank-on-JireCooling water required = n x40x14.4 x 3

= 5426 tpm= 326 ms/hr

Assuming that second tank is located within the tank dyke at a distanqe more than 30Mfrom the tank shell.Then, cooling water requirement @ 1 lpm/ m2of tank shell area = n x40x14.4 x 1

= 1808 lom= 109 m3/hr.

Total cooling water = 326+109= 435 m"/hr

c) Water requirement in foam applicationFoam Application Rate : 8.1 lpm (as per NFPA-1 1)

Foam Solution Requiremenl = (n x 40x40)/4 x 8.1= 10174 lom

= 610 m'/hr

Water required for the foam solution = 97o/o x 61 0 m3/hr= 592 m3/hr

d) Fire water for supplementary hose stream based on 4 hydrant streams + 2 High VolumeLong Range water monitor.

4x36 m3/hr + 2X228 m3/hr = 600 ms/hr

Total water required for root sink case:

Tank cooling 435 m3/hrFoam application 592 m3/hrSupplementary stream 600 m3/hrTotal 1627 m3 thr

Say Total water requirement = 1630 m3/hr

Note:Full surface fire of floating root tank roof sinking case being a remote possibility, it isconsidered as a single largest contingency for the purpose of arriving at design fire waterreouirement.

"oISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ Guidelines/ Recommended practices.,,

ANNEXURE - II

FIRE WATER FLOW RATE FOR COOLING POL TANK WAGON LOADING GANTRY

a) Data

Total No. of loading points = 72 Conventional or48 BTPN.No. ol loading poinls on each side = 24 Nos.Width ol tank wagon ganlry = 12 m.(Cooling two spur)

b) Cooling water tlow rate

Divide total area of gantry into 24 segments, each segment measuring 15 m X 12 m andconsider 3 segments operating at a time.

Water rale required = 3 x 15 m x 12 rn x 10.2 lpm/mz.= 6426= 385 m3/hr

d) Water Requlrement for supplementary Hose:Water for 4 single hydrant streams = 4 x 36 = 144 m'/hr.Water for 1 monitor stream (HVLR) = 1x 228_= 228 m3tht.Total water requirement = 372m'lhr.

Total water llow rate for gantry protection

(a) Gantry cooling = 385 m3/hr.(b) Supplementary hose requirement = 972 m3lhr

Total = 757 m9lht,

- - - ) 0x0(---

"OISD hereby expressly disclaims any liability or responsibility for loss or damage resulting from useof the OISD Standards/ Guidelines/ Recommended Practices."