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IS : 4989 ( Part 3 ) - 1987

Indian Standard SPECIFICATION FOR

FOAM CONCENTRATE ( COMPOUND ) FOR PRODUCING MECHANICAL

FOAM FOR FIRE FIGHTING

PART 3 FLUORO-PROTEIN FOAM

Fire Fighting Sectional Committee, BDC 22

Chairman Representing

SHRI G. B. MENON Gujarat Electricity Board, Vadodara

Members

SHRI S. R. BANSAL Steel Authority of India ( Bokaro Steel Plant ), Bokaro Steel City

SHRI B. L. CRAUDHRY Oil and Natural Gas Commission, Dehra Dun SERI B. K. SIPPY ( Alternate )

CONTROLLER Ministry of Defence ( DGI ) LT-COL V. R. BANAHATI ( Alternate )

SERI K. K. DAS GUPTA West Bengal Fire Services, Government of West Bengal, Calcutta

DEPUTY INSPECTOR ( RPSF )

GENERAL Ministry of Railways

ASSISTANT SECURITY OFFICER ( FIRE ), NORTHERN RAILWAY ( Alternate )

DEPUTY INSPECTOR GENERAL Central Industrial Security Force ( Ministry of ( FIRE ) Home Affairs ), New Delhi

ASSISTANT INSPECTOR GENERAL

State Bank of India, Bombay SHRI S. K. DH~RI Municipal Corpoiation

Service ), Delhi of Delhi ( Delhi Fire

SRRI R. K. BRARDWAJ ( Alternate ) &RI R. R. DHOBLEY DIRECTOR

Bhabha Atomic Research Centre, Bombay Home Department ( Fire Service ), Government

of Tamil Nadu, Madras DEPUTY DIRECTOR ( Alternate )

DIRECTOR GENERAL OF FIRE Home ( Police ) Department, Government of SERVICES Andhra Pradesh, Hyderabad

DEPUTY DIHECTOR ( FIRE SERVICES ) ( Alternate )

DIRECTOR OF EQUIPMENTS National Airport Authority, New Delhi SENIOR FIRE OFFICER ( Afternatc )

I Continued on page 2 )

@ Copyright 1988

BUREAU OF INDIAN STANDARDS

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by anv means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

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( Contrnucd from page 1 )

Members Representing

FIRE ADVISER Ministry of Home Affairs SHRI J. S. JAMJREDJI Steelage Industries Ltd ( Minimax Division ),

Bombay SHRI C. GNANRAJ ( Alternate )

SHRI P. KHANNA Jayashree Textiles and Industries, Rishra SHRI S. N. KUNDU Fire and Safety Appliances Co, Calcutta MANAGING DIRECTOR Avon Services ( Production and Agencies ) Pvt Ltd,

Bombav ’ TECHNICAL EXECUTIVE ( Alternate )

SHRI P. N. MEHROTRA Institution of Fire Engineers ( India ), New Delhi SHRI B. R. MEHTA ( Alternate )

MOBILE COLUMN COXTROLLER Urban Development Public Health and Housing Development, Government of Maharashtra, Bombay

BRIQ S. A. MOHILE Ministry of Defence ( R & D ) SHRI A. K. SURI ( Alternate )

SHRI M. MUKHERJI Steel Authority of India Ltd ( Rourkela Steel Plant ), Rourkela

SHRI C. D. SHARMA ( Alternate ) SHRI V. B. NIKAD~ Municipal Corporation of Greater Bombay

( Bombay Fire Brigade ), Bombay SHRI P. H. SETRNA Kooverji Devshi and Co (P) Ltd, Bombay

SHRI N. T. PANJWANI ( Alternate ) SHRI R. C. SHARMA Directorate General of Supplies and Disposals,

Neti Delhi SHRI D. S. NARESH ( Alternate )

SHRI H. M. SABADRA Reliable ( Fire Protection ) Industries, Bombay SHRI D. K. SIRKAR Svnthetics and Chemicals Ltd. Bareillv SHRI B. J. SHAH

SHRI A. M. SHAH ( Alternate ) SHRI CEANDRAKANT M. SHAH

SHRI M. H. SHAH ( Alternate ) SHRI T. P. SHARMA

SHRI A. K. GUPTA ( Alternate )

Newage Industries, Surendranagar

Zenith Fire Services, Bombay

Cent;iorle$lding Research Institute ( CSIR ),

SHRI TARIT SUR SHRI SUSHIL KUMAR

SHRI J. N. VAR~L SHRI K. RAVI ( Altcrnatc )

SHRI G. RAMAN, Director ( Civ Engg)

Surex Production and Sales ( P ) Ltd, Calcutta Directorate General of Technical Development,

New Delhi Tariff Advisory Committee, Bombay

Director General, BIS ( Ex-ojicio Member )

Secretay

SHRI K. M. MATHUFL Joint Director ( Civ Engg ), BIS

( Continacd on page 26 )

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IS : 4989 ( Part 3 ) - 1987

Indian Standard SPECIFICATION FOR

FOAM CONCENTRATE ( COMPOUND ) FOR PRODUCING MECHANICAL

FOAM FOR FIRE FIGHTING

PART 3 FLUORO-PROTEIN FOAM

0. FOREWORD

0.1 This Indian Standard ( Part 3 ) was adopted by the Indian Standards Institution on 31 March 1987, after the draft finalized by the Fire Fight- ing Sectional Committee had been approved by the Civil Engineering Division Council.

0.2 Foam is a homogeneous mass of tiny air or gas filled in bubbles of low specific gravity which, when applied in the correct manner and in sufficient quantity, form a compact fluid and stable blanket which is capable of floating on the surface of flammable liquids and preventing atmospheric air from reaching the liquid. It is produced by mechani- cally mixing a gas or air to a solution of a foam compound ( concent- rate ) in water. This standard covers the compound in the form of a homoqeneou.s clear liquid, free from suspended matter and visible impuiities used for producing fire fighting foam by mechanical aeration of a water-foam compound solution.

0.3 The foam produced from the concentrates are of low expansion ( up to 20 times ), medium expansion ( above 20 and up to 200 times ) and high expansion ( above 200 times ). The low expansion foam concent- rates are of the following types:

a) Protein foam,

b) Aqueous film forming foam ( AFFF ),

c) Fluoro-protein foam,

d) Synthetic foam*, and

e) Alcohol resistant foam.

*This can be also of medium and high expansion.

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IS : 4989 ( Part 3 ) - 1987

0.4 This standard covering only protein foam concentrate was first published in 1969 and revised in 1974. It has now been decided to revise this standard in parts; Part 1 covering protein foam concentrate which was only covered in its earlier versions, AFFF in Part 2, Fluoro- protein in this Part 3 and synthetic foam in Part 4.

0.5 Fluoro-protein foam concentrates are basically hydrolized protein similar to that covered in Part 1 of the standard and contain some per- centage of fluorinated surface-active agents that provides following added advantage over protein hydrolized foam:

a) fuel shedding property;

b) better compactability with dry powder for fighting fire;

c) faster fluidity/spreadibility; and

d) film forming characteristics.

The method of foam production and mechanism of fire extinction is similar to that of protein foam. This is used as 6 percentt solution with water.

0.6 The shelf-life of the foam compound covered in this part and stored according to the requirements given in 4 is expected to be mini- mum 5 years in tropical conditions.

0.7 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1. SCOPE

1.1 This standard ( Part 3 ) lays down the requirements in respect of physical and performance requirements, packing and marking of fluoro- protein foam concentrate intended for use ‘with mechanical foam generat- ing equipment for extinguishing fire in flammable liquids other than polar solvents like alcohols, ethers, ketones, etc.

2 REQUIREMENTS

2.1 General - The foam concentrate shall be of dark brown or reddish brown colour and free from offensive odour.

NOTE - Blacking of colour of foam compound is sign of decomposition and this degradation is irreversible.

*Rules for rounding off numerical values ( rcuiscd ).

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2.2 Characteristics - The fluoro-protein foam concentrate shall conform to physical and performance requirements indicated in Tables 1 and 2 respectively, when tested in accordance with method specified against each.

TABLE 1 PHYSICAL REQUIREMENTS

SL PROPERTY No.

(1) (2)

i) PH for original and conditioned sample

ii) Specific gravity for original sample and conditioned sample

iii) Miscibility with water

iv) Viscosity at 27 & 1°C

v) Sludge contents ( percent V/U ):

a) Original sample

b) Conditioned sample

vi) Pour point

vii) Microbial susceptibility

REQUIREMENTS ~~~_~h_~~~~ Minimum Maximum

(3) (4)

6 i-5

1.05 1.18

Miscible

40 cst

- 0930

- 0’50

Shall flow

Shall not be susceptible

TEST GIVEN IN

(5)

Appendix A

Appendix B

Appendix C

IS : 1206 ( Part 3 )- 1978* using vis- cosity meter, S1 No. (iv) of Table 2

Appendix D

Appendix D

Appendix E

Appendix F

*Determination of viscosity: Part 3 Kinematic viscosity (/irJt revision ).

3. PACKING

3.1 The fluoro-protein foam concentrates shall be packed in polyethylene jerry cans conforming to IS : 7959-1987”.

4. STORAGE

4.1 The storage place shall be free from dampness and shall be we11 ventilated and the container shall not be directly exposed to sun rays.

4.2 The polyethylene jerry cans shall preferably be stacked in single layers and shall not exceed more than 2 layers.

-~ ___ 9 *Specification for polyethylene jerry cans for foam compounds (/irst revision ).

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TABLE 2 PERFORMANCE REQUIREMENTS

( Clause 2.2 )

SL PERFORBXANCE REQUIREMENTS TEST GIVHN IN No. r--_-*_---~

Minimum Maximum

(1) (2) (3) (4) (5)

i) Expansion at 27 f 1°C 6 - Appendix H

ii) 25 percent drainage time 1 minute 2 minute Appendix J 30 seconds 30 seconds

iii) Fire extinguishment: Appendix K

a) Control time ( time required to - 60 seconds extinguish the fire except for licks of flame at the edges of the foam blanket )

b) Extinction time ( time required - 90 seconds Appendix K for complete extinguishment of the fire )

iv) Sealability 15 minute - Appendix M

v) Burn-back resistance 12 minute - Appendix N

vi) Film forming For: aqueous Appendix P

5. MARKING

5.1 Each container shall be legibly and indelibly marked with the following information:

4 b) cl 4 e) f> d

5.1.1

Manufacturer’s name or trade-mark, if any;

To be written ‘Fluoro-Protein foam concentrate for fire fighting’;

Quantity in litres;

Month and year of manufacture and production batch number;

Net and gross mass;

To be written ‘Contents should not be taken orally’; and

Details of Standard Mark ( if applicable ).

The foam concentrate conforming to this standard may also be marked with the Standard Mark.

NOTE - The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers, may be obtained from the Bureau of Indian Standards.

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APPENDIX A [ Table 1, Sl No. (i) ]

METHOD FOR THE DETERMINATION OF pH VALUE

A-l. PREPARATION

A-l.1 Condition a 500-ml thoroughly mixed sample by heating in an oven maintained at a constant temperature of 65 & 1°C for 72 hours, followed by cooling in a refrigerator maintained at a constant tempe- rature of - 5 _C 1°C for 72 hours and then allowing it to return to 27 f 1°C.

A-2. PROCEDURE

A-2.1 Take 100 ml of a thoroughly mixed unconditioned sample of the foam compound in a beaker and measure its PH value on a standard PH electrometer ( see IS : 4309-1979* ) using glass electrode and at tempe- rature of 27 & 1°C. Record the pH value to the nearest 0.1.

A-2.2 Take 100 ml of thoroughly mixed conditioned sample from A-l and repeat the experiments as in A-2.1. Record the pH value to the nearest 0.1.

APPENDIX B [ TdZe 1, Sl .No. (ii) ]

METHOD FOR THE DETERMINATION OF SPECIFIC GRAVITY

B-l. PROCEDURE

B-l.1 Determine the specific gravity of 100 ml of the thoroughly mixed unconditioned sample at temperature of 27 & 1°C using a pyknometer or specific gravity bottle.

B-1.2 Determine the specific gravity of the 100 ml of conditioned sample taken from A-l.1 in the same manner as in B-1.1.

B-l.3 Record the result to the nearest O-01.

*Methods of measurement on direct reading fiH meters (Jrst r&ion ).

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APPENDIX C [ Table 1, SZ .No. (iii) ]

METHOD FOR THE DETERMINATION OF MISCIBILITY WITH WATER

C-l. SYNTHETIC SEA WATER

C-l.1 Prepare synthetic sea-water by dissolving the following salts in one litre distilled water:

Salt

Sodium chloride ( NaCl ) Magnesium chloride ( MgCI2 )

Sodium sulphate ( NasS04 )

Calcium chloride ( CaC12 ), anhydrous

C-2. PREPARATION

Mass, g

23.0 11’0

4’9

I.6

C-2.1 Prepare a 6 percent v/v solution of foam compound under test at temperature of 27 f 1°C with fresh ( distilled ) water and synthetic sea-water.

C-3. PROCEDURE

C-3.1 The solutions as prepared in C-2.1 shall be kept separately in stoppered graduated cylinder for 48 h. stratification, precipitation or turbidity.

The solutions shall not show any

APPENDIX D [ Table 1, Sl Jvo. (v) ]

METHOD FOR THE DETERMINATION OF SLUDGE CONTENT

D-l. PREPARATION

D-l.1 Keep the sealed container in which foam compound is packed upside down for 10 minutes, shake/roll the contarner thoroughly for sufficient time till the sediment completely disperses in the liquid and then draw 2 samples out of it.

Sample A - 50 ml/100 ml, to be drawn in 50 ml/l00 ml cone-shaped graduated clear glass centrifuge tube, which can read nearest to - 0.1 ml.

Sample B - 250 ml, to be drawn in a 300 ml thermal resistant glass bottle.

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D-l.2 Condition sample B in an oven at 65 & 1% for 72 consecutive hours. Take out the sample and allow it to cool till it stains tempera- ture of 27 & 1°C. Keep it at - 5 f 1°C for another 36 consecutive hours and thereafter allow its temperature to rise to 27 f 1°C. Shake well by rotation till any sediment, which mav have settled, has dispersed uniformly. Take 50 ml/100 ml of-this sample in 50 ml/100 ml cone- shaped centrifuge tube.

D-2. PROCEDURE

D-2.1 Centrifuge ( see D-2.3 ) Sample A for one hour immediately after drawing it as described in D-1.1. Pour out the liquid gently into a clean beaker after centrifuging and note the volume of sediment left at the bottom of the centrifuge tube.

D-2.2 Centrifuge 50 ml/100 ml of conditioned Sample B ( see D-l.1 ) and note the volume of sediment left in the same manner as given in D-2.1.

D-2.3 Any standard centrifuge may be used so long as its rev/min conforms to the following requirements:

where

revlmin = 423 2/ RCF/d

RCF = relative centrifugal force shall be between 500 and 600; and

d = diameter in cm between the tips of the opposite tubes, while in rotating position.

APPENDIX E [ Table 1, 6’1 .No. (vi) J

METHOD FOR THE DETERMINATION OF POUR POINT

E-l. APPARATUS

E-1.I The apparatus shall be as shown in Fig. 1 and shall consist of the following:

a) Test j’ar - A test jar of clear glass, cylindrical form, flat bottom, approximately 30 to 35 mm inside diameter and 112 to 125 mm in height. An ordinary 100 ml sample bottle may by used, if it meets these requirements.

b) Thermometer - A cloud and pour test thermometer which can read down to - 10°C.

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IS : 4989 ( Part 3 ) - 1987

/ THERMOMETER

_- _-

/

zz d

-- --

r CORK

TEST JAR

COOLING BATH

FIG. 1 APPARATUS FOR POUR TEST

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c) Cork - To fit the test jar, bored centrally to take the test thermometer.

d) Jacket - A jacket of glass or metal, watertight, of cylindrical form, flat bottom about 112 mm in depth with inside diameter 10 to 12 tnm greater than the outside diameter of the test jar.

e) Disc - A disc of cork or felt, 6 mm thick and of the same diameter as the inside of the jacket.

f) Gasket - A gasket about 5 mm thick, to fit snugly around the outside of the test jar and loosely inside the jacket. This gasket may be made of cork, felt or other suitable material, elastic enough to cling to the test jar and hard enough to hold its shape. The purpose of the ring gasket is to prevent the test jar from touching jacket.

g) Bath - A cooling bath of suitable size and shape to obtain the required temperatures. The bath shall be provided with a support, suitable for holding the jacket firmly in a vertical position. The required bath temperature may be mentioned by refrigeration, if available, otherwise by suitable freezing mixtures.

E-2. PROCEDURE

E-2.1 The following procedure shall be followed:

a) Pour the thoroughly shaked sample of foam compound into the test jar to a height of not less than 50 mm and not more than 56 mm. Mark the jar to indicate the proper level.

b) Close the test jar tightly by the cork carrying the test thermometer in a vertical position in the centre of the jar with the thermometer bulb immerged so that the beginning of the capillary shall be 3 mm below the surface of the sample.

c) Fix the thermometer in vertical position.

d) Place the disc in the jacket and insert the test jar with the ring gasket 25 mm above the bottom into theigasket.

e) Maintain the temperature of the cooling bath at - 10°C. Support the jacket containing the test jar, firmly in a vertical position in the cooling bath so that not more than 25 mm of the jacket projects out of the cooling medium. As soon as the temperature of the foam compound in the test jar goes down to - 5”C, the jar shall be tilted and flow observed by holding the test jar in a horizontal position for 5 seconds as noted by stop- watch and foam compound shall flow freely.

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APPENDIX F [ Table 1, 5’1 3vo. (vii) ]

METHOD FOR DETERMINING THE SUSCEPTIBILITY OF FOAM COMPOUND TO MICROBIAL ATTACK

F-O. MICROBIAL SUSCEPTIBILITY

F-0.1 The microbial susceptibility of foam compound shall be determined as in F-l to F-3.

F-l. TEST ORGANISM

F-l.1 The following fungi and bacteria shall be used:

Fungi DMSRDE

Culture No.

a) Paecilomyces sp

h) Aspergillus jaws

c) Aspergillus sp

d) Aspergillus niger

Bacteria

a) Bacillus subtilis

b) Bacillus cereus

c) Bacillus sphericus

943

944

945

946

DMSRDE

Culture No.

57

58

52

F-l.2 Maintenance of Stock Cultures - Cultures of the fungi and bacteria shall separately be maintained on potato dextrose agar and nutrient agar media respectively. The stock cultures may be kept in storage for not more than 3 months in a refrigerator maintained between - 3 and - 8°C. Fungal subcultures ( incubated at 30 & 2°C for 6 to 8 days and bacterial subculture at 35 f 2°C for 24 hours ) shall be used in preparation of mixed suspension ( see F-l.4 ) for inoculation of test samples.

F-l.3 Growth Medium

F-1.3.1 Potato Dextrose Agar Medium - It shall have the following composition:

Peeled and sliced potatoes 200 g

Dextrose, A.R. quality 20 g Agar, A.R. quality 25 g Distilled water 1 000 ml

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Wash the peeled and sliced potato in running water. Add 300 ml of distilled water and steam for 25 minutes. Filter the hot extract through a thin layer of wet non-absorbent cotton. Make to 1 000 ml by mixing the extract with melted agar containing dextrose. Adjust the pH to 6.4.

F-1.3.2 3Vufricnt Agar Medium - It shall have the following composition:

Sodium chloride 2’5 g

Peptone ( bacteriological ) 2.5 g

Reef extract 1’5 g

Agar 25 g Distilled water 1 000 ml

Dissolve all the ingredients separately in distilled water and make to 1 000 ml by mixing the extract with melted agar. Adjust the pH to 7.4.

F-1.3.3 Distribute media mentioned in F-1.3.1 and F-1.3.2 separately into number of test tubes ( size 15 x 1.5 mm ) for ‘preparing tubes for subculturing of organism, using 5 ml of the medium for each test tube. Plug the test tuber with non-absorbent cotton wool. Sterilize the tubes with medium for 20 minutes in an autoclave at I kgf/cmz pressure. Remove and place the tubes in slanting position and allow the cultures medium to solidify. The tubes are then used for subculturing the test organisms.

F-1.3.4 Subculturing of Test Organisms - With a sterile needle inoculate the potato dextrose agar slants under asptical conditions with the well sporulated culture of the fungus and incubate at 30 f 2°C for one week. Inoculate similarly the nutrient agar slants with the wellgrown culture of bacteria and incubate at 35 h 2°C for 24 hours. At the end of this period, when a healthy growth of the test organisms is observed, the subculture is ready for use in preparation of suspension.

F-l.4 Preparation of Mixed Suspension - The suspension shall be prepared by pouring into each culture tube separately test fungi and test bacteria ( see F-l ), 10 ml of sterilized distilled water and then rubbing out the surface of the culture tubes of the organisms with the help of inoculating needle and finaly filtering it through a piece of sterilized muslin cloth. Mix the fungal and bacterial suspensions separa- tely into two sets. The suspension should always be freshly prepared for use in inoculation of test sample.

F-2. EQUIPMENTS FOR TESTING

F-2.1 Two conical flasks of 500 ml capacity and 8 pairs of petri dishes of 8 mm dia will be required in testing a sample of foam compound.

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F-3. PROCEDURE

F-3.1 Shaking - The container of the foam compound sample is thoroughly shaken before sampling. Two hundred ml of test sample is drawn and 100 ml is poured into each conical flask.

F-3.2 Inoculation and Incubation

F-3.2.1 Inocufum - For inoculation of test sample, 5 ml of both fungal shall be used separately.

F-3.2.2 Inoculation - Add 5 ml of mixed spores suspension of fungi to one flask containing 100 ml test sample of foam compound. Similarly add 5 ml of bacterial suspension to another flask of test sample. Shake thoroughly before incubation.

F-3.2.3 Incubation - Incubate the test flasks with fungal inoculation at 30 f. 2°C and the onces inoculated with bacteria at 35 f 2°C for period of 7 days.

F-3.3 Examination for Microbial Growth in Test Samples - Take 0.1 ml of I he foam compound from the flask with bacterial inocu- lation and O-5 ml from the flask with fungal inoculation in each sterilized petri dishes separately. Take four replicates separately for fungi and bacterial inoculation. Then pour 10 ml potato dextrose agar medium cooled to 40°C in each petri dish for testing fungal growth and melted nutrient agar medium cooled to 40°C for testing bacterial growth. Gently rotate the petri dishes to obtain a uniform mixing and for proper setting of the medmm. Incubate the petri dishes for bacterial growth at a temperature of 35 f 2°C for 24 hours, and petri dishes for fungal growth at a temperature of 30 * 2°C for 96 hours.

F-3.4 Examine after incubation the petri dishes visually for the growth of fungi and bacteria.

F-3.5 Evaluation of Results - The sample of foam compound shall be deemed susceptible to microbial attack, if there is any growth of the fungi and the bacteria in the test petri dishes.

APPENDIX G ( CZauses H-2.2, J-2, K-3 and N-3.1 )

METHOD OF GENERATING FOAM

G-l. FOAM MAKING NOZZLE

G-l.1 A foam making nozzle having a water foam solution discharge capacity 7.5 litre per minute at 7 kgf/cm2 shall be used for producing foam and checking the performance requirement laid down in Table 2. The details and the dimensions of the nozzle are given in Fig. 2.

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FOAM MAKER REDUCER SOCKET

lRECEIV’ER L DlSPERSAL CONE

2A Assemblv

@ + ‘r “i’ --IL- 1.5

28 Dispersal Cone

2C Stra!ner

*Holes in strainer of 4 l-25 ?tzs with traingular pitch of 2.5 f 0’25

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r M 16.5x1.5

13.5 -4

19.5 J---J

2D Jet

rM16xl.S ,Ot aa

c---_- 53.5 _I

2E Foam Making Body

L-HOLES. P9.5

M31x2.5 QUALLY SF'ACET)

k----W-----4

2F Receiver 2G Air Inlet

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M Z5.5x1.75 (TG SUIT AIR INLEI’)

7.5 +-/y -j-p

t-4 2H Reducer Socket

1.5 BARREL)

5

5

25 Barrel All dimensions in millimetres.

FIG. 2 FOAM MAKING NOZZLE OF CAPACITY 7’5 I/min

G-2. ARRANGEMENT FOR GENERATING FOAM

G-2.1 The following apparatus shall be used and assembled as shown in Fig. 3:

a) loo-Litre Capacity Pressure Reservoir - Made of mild steel sheet and tested to withstand an internal pressure of 25 kgf/cmz. It shall have a filling orifice of not less than 150 mm diameter with an airtight cap and other arrangements as given in Fig. 3.

b) Adjustable stand;

c) Nozzle ( see Fig. 2 ); and

d) Air compressor.

G-3. CALIBRATION

G-3.1 The pressure gauges and nozzle shall be calibrated before use when new and thereafter once every six months according to the standard procedure.

G-4. FOAM GENERATION

G-4.1 The equipment shall be arranged as shown in Fig. 3. The reservoir should be filled with 90 litres of 6 percent premixed solution of foam compound and potable water in desired proportions. The cap shall be tightened. A pressure of 8 kgficm2 shall be built up with help ,of air compressor. The discharge value is then opened and the pressure is ad.justed so as to give a pressure 7 kgf/cmz at the inlet of the nozzle,

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AIR COMPRESSOR

CAP

A PRESSURE GAUG5

HIGH ‘PRESSURE

’ RUBBER TUBE PRESSURE

VESSEL

100 I CAPACITY

HIGH PRESSURE

RUBBER TUBE

PRESSURE GAUGE THE INLET OF NOZZLE)

DISCHARGE

FIG. 3 ARRANGEMENT OF FOAM GENERATING EQUIPMENT

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APPENDIX H [ Table 2, SI JVo. (i) and J-2.1 ]

METHOD FOR THE DETERMINATION OF EXPANSION OF FOAM

H-l. APPARATUS

H-l.1 The following apparatus is required for this test:

a) Weighing Scales - sensitivity 1 g or less.

b) Foam Collector Board - See Fig. 4.

c) Foam Collection Pans - metallic, size 19.0 cm dia X 5.0 cm deep ( capacity 1 400 ml ), made of aluminium sheet of thickness 3 mm. Two numbers marked ‘A’ and ‘B’ and also the tare weight.

H-2. METHOD FOR DETERMINING THE EXPANSION

H-2.1 Weigh each empty foam collection pan and check with the tare weight stamped on it. Also check each pan for damage and correctness of capcity before use.

H-2.2 Generate foam as desired in Appendix G for 6 percent solution at a temperature of 27 f 1°C. Direct the jet of foam on to the foam collector board.

H-2.3 Collect the foam flowing down at the bottom ofthe foam collector board in the two foam collection pans. Level off the foam in the pans with a straight edge to its brim. Wipe the outside of each pan dry and weigh. Calculate the expansion factor in both cases as follows:

Expansion factor = Volume of foam

- __ ____- Volume of the liquid in foam

1 400 = Mass of pan with foam - Mass of the empty pan

H-2.4 Take the average of the two results.

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IS : 4989 ( Part 3 ) - 1987

APPENDIX J [ Table 2, Sl Jvo. (ii) ]

METHOD FOR THE DETERMINATION OF TIME FOR DRAINAGE OF 25 PERCENT OF LIQUID IN THE FOAM

J-l. APPARATUS

J-1.1 Foam Collection Pan - A metallic foam collection pan of size 19’0 cm dia x 5.0 cm deep, capacity 1 400 ml with a small opening at the bottom towards the perimeter to which is attached a small rubber tube and pinch cock.

J-2. METHOD

J-2.1 The following methods shall be adopted:

a) Generate foam with the same apparatus described in Appen- dix G at 6 percent solution;

b) Measure the expansion according to the method described in Appendix H;

c) Collect the same foam from the foam collection board in collection pan keeping the pinch cock attached to the rubber tube closed;

d) Level off the foam collected immediately;

e) Open the pinch cock and allow the water drained from foam in a loo-ml graduated glass cylinder;

f) Note the volume of liquid collected after every 15 seconds and tabulate the time - drainage data;

g) Calculate 25 percent volume of liquid from expansion as follows:

Volume of 25 percent liquid = 1 400

4 x Expansion ml

h) After finding out volume as in ( g ), observe the time taken by this much volume in draining out into cylinder; and

j) Repeat the test thrice and take the mean.

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IS : 4989 ( Part 3 ) - 1987

APPENDIX K [ Table 2, Sl No. (iii) ]

METHOD FOR THE DETERMINATION OF FIRE EXTINGUISHING PROPERTIES

K-l. EQUIPMENT

K-l.1 Take a circular mild steel tank having base area of 2.6 mz with height 0.6 m and suitable steel back-board for striking foam jet. At the opposite end of the back-board is a suitable hole for holding the test nozzle ( see Fig. 2 ), having bracket on the outer side to hold the nozzle securely.

NOTE - Before test, it shall be ensured that inside rurface of the steel tank is clear, free from rust and even without any projections and dents.

K-l.2 Torch to Ignite the Petrol

K-2. PROCEDURE

K-2.1 Pour 260 1 of potable water in the tank so that the height of the water in tank is about 0.1 m. Pour 30 1 of petrol within 30 seconds in the tank over the water surface. Position the test nozzle at 7 kgfcmz pressure at such a level and direction that the foam stream, when dis- charged inside across the tank, strikes it approximately 30 cm above the water/petrol level. The velocity of wind shall not exceed 16 km/h.

K-3. TEST

K-3.1 Ignite the petrol and allow it to burn for 30 seconds. Generate foam ( see Appendix G ) with 6 percent solution and direct the stream for 180 seconds. Record the time after starting foam application as follows for:

a) Control time ( time required to extinguish the fire except for licks of flame at the edges of the foam blanket ), and

b) Extinction tirne ( time required for complete extinguishment of the fire ).

APPENDIX M [ Table 2, Sl .No. (iv) ]

METHOD FOR THE DETERMINRTION OF SEALABILITY

M-l. PROCEDURE

M-l.1 This test shall be carried out 10 minutes after the completion of the fire extinguishment test described in Appendix K.

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IS : 4989 ( Part 3 ) - 1987

M-l.2 Pass a lighted torch continuously over the foam blanket, starting 10 minutes after the completion of foam application and after the fire has been completely extinguished. Care shall be taken to ensure that the torch is not touching or penetrating the foam blanket.

M-l.3 Fourteen minutes after completion of foam application, apply the torch over the foam blanket for 1 minute with the torch touching the foam blanket but not penetrating the blanket by more than 10 mm.

M-l.4 The fuel shall not re-ignite during the test.

APPENDIX N I: Table 2, SI 80. (v) ]

TEST METHOD FOR DETERMINATION OF BURN-BACK RESISTANCE THERMAL STABILITY

N-l. PRINCIPLE

N-l.1 This test method is to assess the burn-back resistance of foam concentrate in terms of time taken by a specified volume produced from spread over a specified area to burn completely when subjected to ignition under still air conditions in an enclosed room.

N-2. EQUIPMENT USED

a) The test nozzle as described in Appendix G.

b) Tray sparge and gas connection as in Fig. 5.

N-3. PROCEDURE

N-3.1 Pour 8 Iitres of potable water in the tray. Pour 3 litres of petrol over it. Ignite the fuel and allow it to burn freely for 30 seconds. Genera&e foam ( see Appendix G ) with 6 percent solution at 7 kgf/cmz and apply it gentIy with the help of a goose neck over the burning fuel surface for 10 seconds. Connect the domestic gas line to the sparge pipe of the tray. Thirty seconds after the foam application, open the gas line fully and ignite the gas bubbling out from the foam blanket. Simultane- ously start the stop watch. Record the time when hundred percent area of the tray is involved into flames.

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IS : 4989 ( Part 3 ) - 1987

<

i 680

-TRAY (MS SHEET

3 min)

>

r #I 12.5 GI PIPE WITH NOZZLE AT ITS FREE END

ANGLE IRON (36 x38x 6 1 min

J (25x3) min

All dimensions in millimetres.

FIG. 5 TRAY WITH STAND

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IS : 4989 ( Part 3 ) - 1987

APPENDIX P [ Table 2, SZ No. (vi) ]

FILM FORMATION TEST

P-l. EQUIPMENT

Mild steel sheet fire tray having dimension of 60 x 60 cm and height 15 cm;

Cylindrical shaped drum made of stainless steel wire mesh of size 180 pm IS Sieve having height of 45 cm, and internal diameter 20 cm. The drum is closed at lower end with M.S. sheet and open at upper end;

A suitable tong to lower and raise the drum in the tray during test; and

The nozzle and the arrangements according to details given in Appendix G.

P-2. PROCEDURE

P-2.1 Pour water in the tray up to a height of 5 cm. Pour 2 litres of petrol over the water surface., Generate the foam and operate the nozzle at 7 kgf/cmz and fill the tray by operation of the nozzle gently with the help of a suitable g,oose neck for 40 seconds. of AFFF application,

Immediately afier stoppage place the cylindrical strainer drum with open

end up on the tray. Wait for 2 minutes. Now lower a lighted torch ( lighted with alcohol petrol through the open end of the strainer and bring it near but not touching ) the liquid surface; care shall be exercised to ensure that burning alcohol petrol does not drip down from the torch over the film surface. The surface shall not ignite. Now the burning torch shall be very lightly touched to the liquid surface. The surface shall not ignite. Keep repeating the test at intervals of I minute from stopping the foam application. The film shall hold for minimum 15 minutes.

NATE - In ail the ahove tests, intermittent self extinguishing ‘walk over’/‘Flash’ of flame is ignored. weak/absent.

However, if sustained burning OCCIITS, rhen the film is considered

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IS : 4989 ( Part 3 ) - 1987

( Continued from page 2 )

Fire Fighting Units Subcommittee, BDC 22 : 3

Conuener Representing

Rena S. A. MOHILE~ Ministry of Defence ( R & D )

Mmbers

SHRI A. K. Sultr ( Alternnte to Brig S. A. Mobile )

SARI MAHESII C. Acnaw~~ Brijbasi Udyog, Mathura SHRI P. S. B:~NERJEII: ( Alternate )

SHRI S. K. BOSJZ Chemical Industries Co Pvt Ltd, Calcutta CONTROLLER Ministry of Defence ( DGI )

LT-COL V. R. BANARATI ( Alternate ) SHRI K. K. DASQUPTA West Bangal Fire Services, Calcutta SHRI S. K. DIXERI Municipal Corporation of Delhi ( Delhi Fire

Service ), Delhi SHRI R. K. BHAR~WAJ ( Alternate )

DIRECTOR 01’ EQUIP~IENT National Airport Authority, New Delhi FIRE ADVISER Ministry of Home Affairs MANAGING DIRE:~TOR Avon Services ( Production & Agencies ) Pvt Ltd,

Bombav SHRI P. N. MEKROTRA Institution of Fire Engineers ( India ), New Delhi

SHRI B. R. MEHTA ( Alto nate ) MOBILE COLUMN CONTI~OLLER Urban Development, Public Health & Housing

Department, Government of Maharashtra, Bombay .

SHRI V. B. NIKAM Municipal Corporation of Greater Bombay ( Bombay Fire Brigade ), Bombay

SHRI H. M. SABADRA Reliable ( Fire Protection ) Industries, Bombay SHRI P. H. SETRNA Kooverji Devshi & Co (P) Ltd, Bombay

SHRI N. T. PANJWANI ( Alternate )

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AMENDMENT NO. 1 SEPTEMBER 1999 TO

IS 4989 ( PART 3 ) : 1987 SPECIFICATION FOR FOAM CONCENTRATE (COMPOUND) FOR PRODUCING

MECHANICAL FOAM FOR FIRE FIGHTING

PART 3 FLUORO-PROTEIN FOAM

( Page 4, clause 0.4, last line ) - Delete ‘and synthetic foam in Part 4’.

[ Page 5, Table 1, SZNo. (v), co1 2 ] - Substitute ‘W/W’ for ‘v/v’.

(Page 5, Table 1, Sl No. (v), co1 4 ) - Substitute ‘0.5’ for ‘0.30’ and ‘1.0’ for ‘0.50’.

[ Page 6, Table 2, Sf No. (i) 1:

a) Substitute ‘27&C’ fur ‘27 * l°C’ in co1 2.

b) Substitute ‘12’ for ‘6’ in cd 3.

(Page 6, clause 5.1)- Insert the following at the end:

‘h) Do not store in direct sun rays.’

(Page 8, clause D-1.1, Sample ‘B’ ) - Substitute ‘300 ml’ fof ‘250 ml’ and ‘500 mi capacity stoppered conical flask’ for ‘300 ml thermal resistant glass bottle’.

(Page 9, clause D-2.1 ) -Substitute the following for the existing clause:

‘D-2.1 Clean, dry and weigh centrifuge tube.’

(Page 9, clause D-2.2 ) - Substitute the following for the existing clause:

‘D-2.2 Centrifuge the Sample A for 1 hour immediately after drying the sample. Pour out the liquid gently after centrifuging. Dry the centrifuge tube containing the sludge in an oven at 60°C for 1 hour. Then keep it a: ambient tempetamre for 30 minutes and take the weight of centrifuge tube along with the sludge. Calculate the sludge content as follows:

Weioht nf &&w mtrtar\t nf the ~amnlr Sludge content, percent = ---- -

D- _________ __ ___ __ ___=-_ xl00

Volume of foam (50/100 ml) x Sp.Gr.

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[ Page 11, clause EZ.l(e), he 6 ) - Subatitute ‘0°C’ fur ‘-5°C’.

( Puge 19, clause H-2.2 ) - Substitute ‘27 t 5’C’ for ‘27 * l°C’ and inaelt the hollowing at the end:

‘The distance between foam nozzle-and collecting board should be 3 2 0.1 metre.’

( Page 22, Appendix K ) - Substitute ‘Heptane’ for ‘Petrol’ wherever appears.

(Page 22, clause M-l.1 ) - Insert ‘immediately’ before ‘10 minutes.’

( Page 23, Appendix N )- Substitute ‘Heptane’ for ‘Petrol’ wherever appears’.

( Page 25, Appendix P ) - Substitute ‘Heptane’ for ‘Petrol’ wherever appears.

(CED22) Reprography Uoi~, BIS, New Delhi, India

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