Is-4989_2 Foam Concentrate

IS : 4989 ( Part 2 ) - 1984 ( Reaffirmed 1995 )

Indian Standard SPECIFICATION FOR

FOAM CONCENTRATE FOR PRODUCING MECHANICAL FOAM FOR FIRE FIGHTING

PART 2 AQUEOUS FILM FORMING FOAM ( AFFF )

( First Reprint MARCH 1997 )

UDC 614.842.615

0 Copyright 198.5

Gr 7

BUREAU OF INDIAN STANDARDS MANAK BllAVAN. 9 BAIlADlJR SHAH ZAFAR MARG

NEW DELHI 110002

April 1985

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IS : 4989 ( Part 2 ) - 1984




Fire Fighting Sectional Committee, BDC 22

Chaitman

SHRI G. B. MENON E-73 Nanakpura, New Delhi

Members Representing

SH~I A. N. AHLUWALIA TheNIztgit;m of Fire Engineers ( India ), e

SHRI B. R. MEH!CA ( Alternate ) SHRI S. R. BANSAL Steel Authority of India Ltd ( Bokaro Steel

Plant ), Bokaro Steel City CHIEB FIRE OFBICER Municipal Corporation of Delhi ( Delhi Fire

Service ), Delhi SHRI R. K. BHARDWAJ ( Alternate )

SHKI K. K. DAS~UPTA West Bengal Fire Services, Government of West Bengal, Calcutta

DEPUTY INSPECTOR GENERAL Ministry of Railways ( RPSF )

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

Snnr V. P. DEWAN Ministry of Defence ( DGI ) LT-COL V. R. BANA~ATI ( Alternate )

SHRI R. R. DHOBLEY Bhabha Atomic Research Centre, Bombay DIRECTOR Home Department ( Fire Service ), Government

of Tamil Nadu, Madras DEPUTY DI~;;~T;; ( Alternate )

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

DEPUTY DIRECTOR ( FIRE SERVICES ) ( Alternate )

FIRE ADVISER Ministry of Home Affairs

( Continued on page 2 )

@,Copyright 1985

BUREAU OF INDIAN STANDARDS This publication is protected under the Indian Copyright Act ( XIV of 1957) and reproduction in whole or in part by any 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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IS:4989 (Part2)-1984

( Confinuedfrom fhzgs 1 )

Members SHRI A.K. GUPTA

SHRI J. S. JAMSREDJI

SERI C. GEANARAJ ( Alfcrnafc ) SHRI P. KHANNA SHNI V. V. KIMMATXAB SHRI S. N. KUNDTJ MANAQINQ DIRECTOR

Repfasrnting Ceo~o~r~~lding Research Institute ( CSIR ),

Steelage Industries Limited ( Mioimax Division ), Bombay

Jayashree Textiles and Industries, Rishra Oil and Natural Gas Commission, Dehra Dun

Fire and Safety Appliances Co, Calcutta Avon Services ( Production and Agencies ) Pvt

Ltd, Bombay TECHNICAL EXECUTIVE ( Altanatc )

COL S. A. MOBILE Ministry of Defeoce ( R & D ) SBRI A. K. Snar ( Ahnate )

SHRI M. MU~~ERJI Steel Authority of India Ltd ( Rourkela Steel Plant ) , Rourkela

SHRI C. D. SHARMA ( Allsrnalc ) SHRI V. B. NIKAY Municipal Corporation of Greater Bombay

( Bombav Fire Brigade ), Bombay SHRI P. N. PANCHAL

SHRI I). N. PANDIT

Central Industrial S&urity Force ‘( Ministry of Home Affairs ), New Delhi

Directorate General of Supplies & Disposals, New Delhi

_.

SERI P. H. SETHNA Kooverji Devshi and Co ( P ) Ltd, Bombay SRRI N. T. PANJWANI ( Aknatc )

SHRI D. K. SIREAR Synthetics & Chemicals Ltd, Bareilly SHRI CHANDRAKANT M. SHAH Zenith Fire Services, Bombay

SHRI M. H. SHAH ( Alfcrnafc ) SHXI J. V. SRAH Newage Industries, Sureodranagar ( Gujarat )

SHRI B. J. SHAH ( Alternate ) SIIRI TARIT Sun Surex Production and Sales Pvt Ltd, Calcutta SHRI SUSHIL KUMAR Directorate General of Technical Development,

New Delhi SHRI J. N. VAXIL Tariff Advisory Committee, Bombay

SHRI K. RAVI ( Alternate ) SHRI S.VENKASWAMY Directorate General of Civil Aviation, New Delhi SHRI B. V. WAQLE Urban Development, Public Health and Housing

Department, Government of Maharashtra, Bombay

SHRI V. H. MADEAIKAR ( Affernale ) SHRI G. RAPAN, Director General, IS1 ( Ex-oficio Msmbcr )

Director ( Civ Engg )

Sccrotar)

SHRI K. M. MATEUR Senior Deputy Director ( Civ Eogg ), IS1

( Continuad on page 26 )

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IS : 4989 ( Part 2 ) - 1984




0. FOREWORD

0.1 This Indian Standard ( Part 2 ) was adopted by the Indian Standards Institution on 22 November 1984, after the draft finalized by the Fire Fighting Sectional Committee had been approved by the Civil Engineer- ing 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 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 mechanically mixing a gas or air to a solution of! a foam compound ( concentrate ) in water. This standard covers the foam compound in the form of a homogeneous clear liquid, free from suspended matter and visibIe impurities used for the production of fire fighting foam which is produced by mechanical aeration of a water foam compound solution.

063 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 concentrates are of the following types:

a) Protein foam,

b) Aqueous flm forming foam ( AFFF ),

c) Fluoro-protein foam,

d) Synthetic foam*, and

e) Alcohol resistant foam.

*This can be also medium and high expansion.

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IS : 4989 ( Part 2 ) - 1984

0.3.1 AFFF concentrates, which are also referred to as fluoro-chemical foam concentrates, are based on fluoronated surface active materials in combination with suitable stabilizers and foaming agents. The foam produced from such a concentrate acts both as a barrier to exclude air or oxygen and to form thin aqueous film which floats on fuel surfaces and is capable of supressing the evolution of fuel vapours.

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 earlier covered in its earlier versions and introducing AFFF in Part 2. The other types of foam are stages of developments and when completed will be introduced in other parts of this standard.

0.4.1 The AFFF concentrate is used by dilution with water in fixed, mobile or portable fire extinguishers. This concentrate may be used with inductor or proportionator at 3 percent or 6 percent, whichever is applicable. This may also be diluted for ready use as pre-mixed solution with fresh water. For ready use, it shall not be stored below 0% and its prolonged storage above 40°C shall be avoided.

0.5 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, express- ing the result of a test or analysis, 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 2 ) lays down requirements in respect of physical and performance, packing, storage and marking of AFFF intended for use with mechanical foam generating equipment for extinguishing fire in flammable liquids other than polar solvents.

2. TYPES

2.1 The AFFF concentrates shall be of following two types:

Type 3 To be used as 3 parts of concentrate to 97 parts of water v/v, to produce AFFF.

Type 6 To be used as 6 parts of concentrate to 94 parts of water v/v, to produce AFFF.

*Rules for rounding off numerical values ( reviwd ).

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k.. .

IS : 4989 ( Part 2 ) - 1984

3. REQUIREMENTS

3.1 General - The AFFF concentrate shall not show any stratification when determined !>y visual examination of a 200 ml sample contained in a 250 ml graduated glass cylinder.

3.2 Characteristics - The AFFF concentrates shall conform to physical and performance requirements indicated in Tables 1 and 2 respectively when tested in accordance with the method specified against each.

4. PACKING

4.1 AFFF concentrate shall be packed in any one of the containers given in 4.1.1 and 4.1.2.

4.1.1 Polyethylem Jerry Cans - It shall conform to IS : 7959-1976*. The capacity shall be 20 and 30 litres.

4.1.2 Ungalvanized mild steel drums shall conform to Grade A2 or B2 of IS : 2552-1979t of capacity 20 litres. The closure shall consist of 75 mm or 100 mm according to provision given in thip standard. In addition, the internal surface of the drum shall be lined with minimum 30 microns thick epoxy coating conforminK to IS : 8230 - 1976$ and external surface shall be painted with suitable primer (see IS : 123- 19625 ) and thrn painted fire red conforming to Shade No. 536 of IS : 5-197811. The paint shall conform to IS : 2932-19717.

5. STORAGE

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

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

6. MARKING

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

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

*SpcciGcatiou for polyethylene jwry cans for foam compounds. TSpccilication for steel drums ( galvanized and ungalvanizcd )( secondrcui&n ). $Specitication for steel-filled epoxy resin based adhrsives. $SpcciGcation for ready mixrd paint, brllshing, finishing, semi-gloss, for general

ptwpows, to lntlinn Sfnndard colours. I!Spccilication for colo~trs for rs.ady mixed paints and enamels ( third reuisiou). q[Specilication for mamel, synthetic, exterior (a) under-coating, (h) finishing ( J~J/

revision ) .

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IS :4989(PartZ) -1984

b) C> d) e) f )

To be written ‘AFFF Type S/Type 6’ ( as applicable );

Quantity in litres;

Month and year of manufacture and production hatch No.;

Net and gross mass in kg; and

Details of ISI Certification mark ( if applicable ).

6.2 BIS Certification Marking

The product may also be marked with Standard Mark.

6,2.1 The use of the Standard Mark is governed by the provisions of Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the licence Cor the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.

TABLE 1 CHEMICAL AND PHYSICAL REQUIREMENTS

( cluusc 3.2 )

%. PROPERTY

(1) (2) i) pH for both original and con-

ditioned sample

ii) Specific gravitv for both original and conditioned sample

iii) Miscibility with water

iv) Viscosity at 27” + 1°C

v) Sludge contents ( percent v/v )

vi) Freezing point

3 vii) Film formation

viii) Spreading co-efficient

REQUIREYENTB TEST GIVEN IN r-___-~--_-_~

Min MU

(3) (4) (5) 6’5 7’5 Appendix A

O-80 1’10 Appendix B

Miscible - Appendix C

40 cst IS : L$Part 3)-

Using viscosity meter Sl No. (iv) of Table 2

- 0’25% Appendix D

Shall flow at - 5°C

Forms aqueous film

Appendix E

Appendix G ( See Note )

- 3’00 Appendix H

NOTE- Appendix F covers details of nozzle and method of foam generation utilized in later appendices.

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

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IS : 4989 ( Part 2 ) - 1984

ST, No.

(1)

4

ii)

PERFOIIMANCIZ

(2)

Expansion at 27” f 1%

REQUIREMENTS TEST GIVEN IN c---_-~__--_~

Min Max

(3) (4) (5)

6 12 Appendix J

252Perz’;t grainage time at 70 sets - Appendix K 0 0

iii) Fire test extinction time 60 sets - Appendix L

iv) Resistance to burn back 8 minutes - Appendix M

TABLE 2 PERFORMANCE REQUIREMENTS

( Clause 3.i )

APPENDIX A

[ Tcible 1, SZ .hfo. (i) ]

METHOD FOR THE DETERMINATION OF pH VALUE

A-l. PREPARATION

A-l.1 Condition a 500 ml thoroughly mixed sample of each type of AFFF concentrate by heating it in an oven maintained at a constant temperature of 45 &l”C for 52 hours; followed by cooling it in a refrigerator maintained at a constant temperature of -5 f 1°C for 72 hours and then allowing it to return to temperature of 27 .f 1°C.

A-2. PROCEDURE

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

A-2.2 Repeat the experiment as in A-2.1 by taking 100 ml of conditioned sample taken from A-l.1 and record the PH value to the nearest 0.1.

*Methdds of measurement of direct reading pH meters.( ,jird rcuision ).

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IS:4989(Part2)-1984

APPENDIX B [ Table 1, Sl JVo. ( 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 of AFFF of each type at a temperature of 27 f 1°C using a pynkometer or specific gravity bottle.

B-l.2 Determine the specific gravity of the 100 ml conditioned sample taken from A-l.1 in the same manner as in B-1.1.

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

APPENDIX C [ T&de 1, Sl jvo. ( iii ) ]

M.ETHOD FOR THE DETERMINATION OF MISCIBILITY WITH WATER

C-l. SYNTHETIC SEA WATER

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

Salt Mm ( g 1

Sodium chloride ( NaCl )

Magnesium chloride ( MgCls )

Sodium sulphate ( NazSOl )

Calcium chloride ( CaCI, ), anhydrous

C-2. PREPARATION

25.0

11.0

4-o

1.6

C-2.1 Prepare a solution of 250 ml containing 6 percent of Type 3 concentrate in 94 percent of both fresh distilled and synthetic sea prepared as in C-l.1 by volume at a temperature 27 f 1°C.

in one

AFFF water

C-2.2 Prepare a solution of 250 ml containing 12 percent of Type 6 AFFF concentrate in 88 percent of fresh distilled and synthetic sea wctcr prepared as in C-l.1 by volume at a temperature of 27 f 1°C.

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IS : 4989 ( Part 2 ) - 1984

C-3. PROCEDURE

C-3.1 The solutions as prepared in C-2.1 and C-2.2 shall be kept separately in stoppered graduated cylinder for 48 hours. The solutions shall not show any stratification, precipitation and turbidity.

APPENDIX D

[ Table 1, Sl .No. (v) ]

METHOD FOR THE DETERMINATION OF SLUDGE CONTENT

D-l. PREPARATION

D-l.1 Shake/roll the container in which the AFFF concentrate is stored after keeping upside down for ten minutes thoroughly for sufficient time till the sediment completely disperses in the liquid and then draw two samples out of it.

Sample A 50/100 ml to be drawn in 50/100 ml cone shaped graduated clear glass centrifuge tube, which can read nearest to O-1 ml, each type separately.

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

D-l;2 Condition sample ‘ B ’ by keeping it in an oven at 45 f 1°C for 72 h. Take out the sample and allow it to cool till it attains room temperature at 27 f 1°C. Keep it at - 10 f 1°C for another 72 h and thereafter allow its temperature to rise to room temperature at 27 f 1°C. Shake well by rotation till any sediment which may have settled has dispersed uniformly. 100/50 ml centrifuge tube.

Take 100/50 ml of this sample in a

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 100/50 ml of conditioned Sample B ( see D-l.2 ) and note the volume of sediment left in the same manner as given at D-2.1,

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IS:4989(Part2)-1984

D-2.3 Any standard centrifuge may be used conforms to be following requirements:

revlmin = 423 ./HCFjd

where

so long as its rev/min

RCF e= reeitive centrifugal force shall be between 500 and 600,

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

APPENDIX E [Table 1, Sl Jvo. (vi) ]

METHOD FOR THE DETERMINATION OF FRBEZING POINT

E-l. APPARATUS

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

4

b)

4

4

e)

f >

9)

Test Jar - 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 be used if it meets these requirements.

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

Cork - A cork to fit the test jar, bored centrally to take the test thermometer.

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

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

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.

Bath- A cooling bath of suitable size and shape for obtaining the required temperatures. The bath shall be provided with a support, suitable for holding the jacket firmly in a vertical

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L

__ _-

F

IS:4989 (Part2)-1984

/-

THERMOMETER

r CORK

/- TEST JAR

I L-

, ,- L

Fro. 1 APPARATUS FOR FREEZINCJ POINT

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IS t 4989 ( Part 2 ) - 19&i

position. The required bath temperature may be maintained by refrigeration, if available, otherwise by suitable freezing mixtures.

E-2. PROCEDURE

E-2.1 The following procedures shall be followed:

4

b)

4

4

Pour the thoroughly mixed sample of AFFF concentrate each type seperately into the test jar to a height of not less than 50 mm and not more than 56 mm. level.

Mark the jar to indicate the proper

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 immersed so that the beginning of the capillary shall be 3 mm below the surface of the sample.

Fix the thermometer in vertical position.

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

e) Maintain the temperature of the cooling bath at -5°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 AFFF concentrate in the test jar goes down to O”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 AFFF concentrate shall flow freely.

APPENDIX F

( Clauses G-l, J-2, K-2, L-3 and M-3 )

METHOD OF GENERATING FOAM

F-l. FOAM MAKING NOZZLE

F-1.1 A foam making nozzle having a water foam solution discharge capacity 7 litres per minute at 7 kgf /cm* 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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IS t 4989 ( Part 2 ) - 1984

F-2. ARRANGEMENT FOR GENERATING FOAM

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

a)

b)

c)

d)

1004itre capacity pressure reservoir- Made of mild steel sheet and tested to withstand an internal pressure of 25 kgf /ems. It shall have a filling orifice of not less than 150 mm diameter with a air tight cap with detail arrangement as shown in Fig. 3;

Adjustable stand;

Nozzle ( see Fig. 2 ); and

Air compressor.

REDUCER SOCKET

~RECEIYER \--DISPERSAL CONE

IA Assembly

-I_ .6.2

T --II-- 1.5

Dispersal Cone

All dimensions in millimetres.

Pm. 2 FOAM MAKING NOZZLE OF CAPACITY 7 l/min - Contd

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IS I 4989 ( Part 2 ) - 1984 . @VI -T- +23

-L 6

2C Strainer

M 31 x 2.5

THREADS AS M 16x1.5 PER G3//, OF 170 SUIT 7

2D Jet

2E Foam Making Body

All dimensiona in millimetrer.

FIG. 2 FOAM MAKING NOZZLE OF CAPACITY 7 l/min-Contd

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-..,- _. _,_._... ,_ ..I

IS : 4989 ( Part 2 ) - 1984

EQUALLY SPACED $5 aa (TO SUIT FOAM u-l-3 mA Nn

T M 15 x1.5

1 q!~ 2.0. THROUGH

5

2F Receiver

M 25.5x1.75 (TO 6UlT AIR INLET)

426 Air inlet

17 xl 5

UIT BARREL1

2H Reducer Socket 2J Barrel

All dimensions in millimetres.

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

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t: . .

h

PRESSURE GAUGE > r-BY PASS

HIGH PRESSURE

RUBBER TUEE

AIR COMPRESSOR

PRESSURE GAUGE AT THE INLET OF NOZZLEI

HIGH PRESSURE RUBBER TUBE

Fro. 3 ARRANGEMENT OF FOAM GENERATING EQUIPMENT

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IS : 4989 ( Part 2 ) - 1984

F-3. CALIBRATION

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

F-4. FOAM GENERATION

F-4.1 The equipment shall be arranged as shown in Fig. 3. The reservoir should be filled with 90 litres of premixed solution of foam concentrate and potable water depending upon the type. The cap shall be tightened. A pressure of 8 kgf/cm* shall be built up with the help of air compressor. The discharge valve is then opened and the pressure is adjusted so as to give a pressure of 7 kgf/cms at the inlet of the nozzle.

APPENDIX G [ Tuble 1, SZ Jvo. (vii) ]

FILM FORMATION TEST

G-l. EQUIPMENT

a>

b)

4

d)

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 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.

The nozzle and the arrangements as per details given in Appendix F.

G-2. PROCEDURE

G-2.1 Pour water in the tray, up to height of 5 cm, Pour 2 litres of petrol over the water surface. Generate the foam and operate the nozzle at 7 kgf/cms and fill the tray by operation of the nozzle for 40 seconds. Immediately after stoppage of AFFIJ applicatjon place the cylinderical strainer drum with open end up on the tray. Wait for 2 minutes. Now lower a lighted torch ( lighted with alcohol 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 does not drip down from the torch over the film surface. The surface shall not ignite. Now the burning torch shall

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IS : 4989 ( Part 2 ) - 1984

be very lightly touched to the liquid surface. The surface should not ignite. Keep repeating the test at intervals of 1 minute from stopping the foam application. In cases of samples having slow drainage, the film formation may be delayed and hence the sample can be considered acceptable even if it passes in the above test when tested at 5 minutes. The film shall hc!d for minimum 15 minutes.

NOTE --In all the above tests intermittent self-extinguishing “walk over”/ “Flash” of flame is ignored. considered weak/absent.

However, if sustained burning occurs, then the film is

APPENDIX H

[ Table 1, Sl .No. (viii) ]

METHOD OF DETERMINATION OF SPREADING COEFFICIENT

H-l. SPREADING COEFFICIENT

H-l.1 The spreading coefficient shall be determined with reference to cycle-hexane in accordance with the following relationship:

S s/b = rb - r, - ri

where

s&, = spreading coefficient,

rb = standard value of surfaces tensions of cycle-hexane,

rg = surface tension of premixed AFFF solution as determined in H-2.2, and

rr = inter-facial tension between premixed AFFF and cyclo- hexane as determined in H-3.

H-2. METHOD FOR DETERMINING THE SURFACE TENSION AND INTER-FACIAL TENSION

H-2.1 Apparatus - The following apparatus is required:

a) Du Nouy precision tensiometer,

b) Platinum ring of 4 or 6 cm circumference, and

c) Sample container ( glass ) 6 cm in diameter.

H-2.2 Sample - A solution of 10 ml of 3 _I 0.05 percent of Type 3 AFFF and 9i pcrccnt of‘ distilled watrr by volume or 6 f 0.1 percent of Type 6 AFFF and 94 percent of distilled water by volume.

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IS : 4989 ( Part 2 ) - 1984

H-2;3 Procedure - Calibrate the tensiometer. Clean the glassware with chromic sulphuric acid rinsing in distilled water. The platinum ring shall be rinsed thoroughly in a solvent and distilled water and then dry it in the oxidising portion of the gas flame. Check the level of the tensiometer and insert the platinum ring in the sample of AFFF solution contained in glass sample container. Take the measurement. Set the dial and the vernier at zero portion. submerged.

Raise the sample platform until the ring is first Lower the platform slowly, at the same time applying torsion

to the wire by means of dial adjusting screw so that the ring system remains constantly at its zero position. As the breaking point is approa- ching nearer and nearer, adjustments are made slowly. Record the dial reading when the ring detaches from the surface and express it in degrees/cma.

H-3. METHOD FOR THE DETERMINATION OF INTER-FACIAL TENSION

H-3.1 Apparatus - Same as in H-2.1.

H-3.2 Sample - Same as in H-2.2.

H-3.3 Procedure - The inter-facial tension is determined in the same manner as the surface tension with the following modifications:

a) Use fresh solutions and freshly cleaned platinum ring for each determination.

b) Always move the ring from the aqueous side of the interface through to the non-aqueous side liquid.

c) First place the aqueous solution in the sample vessel and immerse ,the ring therein. Carefully pour the oil on top of the aqueous solution to form the two larger systems. Contact between the oil and the platinum ring should be avoided during this operation. After allowing sufficient time, make the measurement in the same manner as that used for measuring surface tension.

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IS : 4989 ( Part 2 ) - 1984

APPENDIX J

[ Table 2, SI No. (i), and Clause K-2.1 ]

METHOD FOR THE DETERMINATION OF EXPANSION OF FOAM

J-l. APPARATUS

J-1.1 The following apparatus is required for this test:

Weighing Scales - Sensitivity 1 g or less,

Foam Collector Board - See Fig. 4,

Foam Collection Pans - Size 19.0 cm dia x 5.0 cm deep ( capa. city 1 400 ml ), made of aluminium sheet of thickness in 3 mm- two numbers marked ‘ A ’ and ‘ B ’ and also with the tare weight.

J-2. METHOD FOR DETERMINING THE EXPANSION

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

J-2.2 Generate foam ( each type separately ) at 7 kgf/cms with the arrangement’given in Appendix F at a temperature of 27 f 1°C. Direct the jet of foam on to the foam collector board.

J-2.3 Collect the foam flowing down at the bottom of the 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 --__ I-- = Mass of the pan wrth foam- Mass of the empty pnn

J-2.4 Take the average of the two results.

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-_ .._” -.. 1.-- . ..^.._.. -I

IS t 4989 ( Part 2 ) - 1984

APPENDIX K

f Table 2, SZ .No. (ii) ]

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

K-l. APPARATUS

K-l.1 Foam Collection Pan - A metallic foam collection pan of size 19-O cm dia, 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.

K-2. METHOD

K-2.1 The following methods shall he adopted:

a) Generate each type of foam with the arrangement described in Appendix F.

b) Measure the expansirm according to the method described in Appendix J .

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 collect the water drained from foam in a 100 ml graduated glass cylinder.

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

Volume of 25 percent liquid= 1400

4 x Expansion ml

h) After finding out volume [ as in (g) 1, observe the time taken by this in draining out into the cylinder.

j) Repeat the test thrice and take the mean

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IS : 4989 ( Part 2 ) - 1984

APPENDIX L [ Table 2, SZ Jvo. (iii) ]

METHOD FOR THE DETERMINATION OF FIRE EXTINGUISHING PROPERTIES

L-l. EQUIPMENT

El.1 Take a circular mild steel tank having base area of 2.6 rns 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 having bracket on the outer side to hold the nozzle securely.

L-l.2 Torch - to ignite petrol.

L-2. PROCEDURE

L-2.1 Pour 225 Iitres of potable water in the tank so that the height of the water in tank is about 10 cm. Pour 30 litres of 73 NL petrol in the tank over the water surface. Position the test nozzle at 7 kgf/cm2 pressure at such a level that the foam stream, when discharged inside across the tank, strikes it approximately 30 cm above the water/petrol level.

L-3. TEST

L-3.1 Ignite the petrol and allow it to burn for 30 seconds. Generate foam ( see Appendix F ) each type separately and direct the stream at the back of the tank on to the back-board for 6U seconds. Record the time after starting foam application for total extinction of fire.

NOTE 1 - Flame licks on the edges or pcriphcry of tank may be ignored for the purpose of evolution of total extinction time of fire, if fire extingllishcs automati- cally after halting of foam application after 60 seconds.

NOTE 2 - The intermittent self-extinguishing walk over/Rash of flame is to be ignored.

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

TEST METHOD FOR DETERMINATION OF BURN-BACK RESISTANCE ( THERMAL STABILITY )

M-l. PRINCIPLE

M-l.1 This test method is to assess the burn-back resistance of AFFF in terms of time taken by a specified volume of produced foam spread over

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IS : 4989 ( Part 2 ) - 1984

a specified are to burn completely when subjected to ignition under standard laid down coditions This test has to be carried out understill air conditions in an enclosed room.

M-2. EQUIPMENT

M-2.1 The following equipments shall be used

a) The test nozzle, and

b) Tray sparge and gas connection in accordance with Fig. 5.

:ANG’LE IRON7

ID 6.35 GAS PIPE WITH SEVEN HOLES

FIG. 5 TRAY WITH STAND

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c- ._ - _. __

IS : 4989 ( Part 2 ) - 1984

M-3. PROCEDURE

M-3.1 Pour 8-litres of potable water in the tray. Pour 34itres of petrol over it. Ignite the fuel and allow it to burn freely for 30 seconds. Generate foam ( see Appendix F ) each type separately at 7 kgf/cm” and apply it gently 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. 30 seconds after the foam application, open the gas line and ignite the gas bubbling out from the foam blanket. Simultaneously start the stop watch. Record time when 100 percent area of the tray is involved into flames,

2s

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IS t 4989 ( Part 2 ) - 1984

( Continuedfrom page 2 )

Fire Fighting Units Subcommittee, BDC 22 : 3

COIWtXET Representing

SIXEI P. N. GHOSH In personal capacity (J-1916, Chittnranjan Park, New Delhi )

Members

SHRI MAHESH C. ARARWAL Brijbashi Udyog, Mathura SHR~ P. S. BANEI~JEE ( Alernatc )

SH~I A. CHATTOPADHYAY The Institution of Fire Engineers ( India ), New Delhi

CHIEF FII~E OFBICER Municipal Corporation of Delhi ( Delhi Fire Service ) , Delhi

SHKI R. K. BHARDWAJ ( Alternate ) SHRI V. P. DEWAN Ministry of Defence ( DGI )

LT-COL V. R. BANAHATI ( Alternate ) DIXECTOR West Bengal Fire Serviceq’Calcutta FIBE ADVISER Ministry of Home Affairs Cot S. A. MOHILE Ministry of Defence ( R & D )

SHXI A. K. SURI ( Alternate ) SHRI V. B. NIRAM Municipal Corporation of Greater Bombay

( Bombay Fire Brigade ), Bombay SRRI H. M. SABADRA Reliable ( Fire Protection ) Industries, Bombay SHRI K. K. SAWHNEY Air Foam Industries Pvt Ltd, New Delhi

SRRI R. MEHTA ( Alternate ) SHRI P. H. SETHNA Kooverji Devshi & Co ( P ) Ltd, Bombay

SHRI N. T. PANJWANI ( Alternate ) SHRI D. K. SIREA~ SHRI S. VENRA~WAMY

Synthetics & Cg$;;;s Ltd, Bareil; Directorate e of Aviation,

New Delhi SHRI B. V. WACZLE Urban Development and Public Health, Housing

Department, Government of Maharashtra,

SHRI V. H. MADEAIKAR ( Aiternate) Bombay

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BUREAU OF INDIAN STANDARDS

Headquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 323 0131, 323 3375, 323 9402 Fax :91113234062, 91113239399, 91113239382

Telegrams : Manaksanstha (Common to all Offices)

Central Laboratory: Telephone

Plot No. 20/9, Site IV, Sahibabad Industrial Area, SAHIBABAD 201010 8-77 00 32

Regional Offices:

Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 323 76 17

*Eastern : 1114 CIT Scheme VII M, V.I.P. Road, Maniktola, CALCUTTA700054 337 86 62

Northern : SC0 335-336, Sector 34-A, CHANDIGARH 160022 60 38 43

Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113 235 23 15

tWestern : Manakalaya, E9 Behind Marol Telephone Exchange, Andheri (East), 832 92 95

MUMBAI 400093

Branch Offices:

‘Pushpak’, Nurmohamed Shaikh Marg, Khanpur, AHMEDABAD 380001 550 13 48

*Peenya Industrial Area, 1 st Stage, Bangalore - Tumkur Road, 839 49 55

BANGALORE 560058

Gangotri Complex, 5th Floor, Bhadbhada Road, T. T. Nagar, BHOPAL 462003 55 40 21

Plot No. 62-63, Unit VI, Ganga Nagar, BHUBANESHWAR 751001 40 36 27

Kalaikathir Buildings, 670 Avinashi Road, COIMBATORE 641037 21 01 41

Plot No. 43, Sector 16 A, Mathura Road, FARIDABAD 121001 8-28 88 01

Savitri Complex, 116 G. T. Road, GHAZIABAD 201001 8-71 19 96

531.5 Ward No. 29, R. G. Barua Road, 5th By-lane, GUWAHATI 781003 54 11 37

5-8-58C, L. ,N. Gupta Marg, Nampally Station Road, HYDERABAD 500001 20 10 83

E-52, Chitaranjan Marg, C-Scheme, JAIPUR 302001 37 29 25

1171418 B, Sarvodaya Nagar, KANPUR 208005 21 68 76

Seth Bhawan, 2nd Floor, Behind Leela Cinema, Naval Kishore Road, 23 89 23

LUCKNOW 226001

Patliputra Industrial Estate, PATNA 800013

T. C. No. 14/1421, University P. 0. Palayam, THIRUVANANTHAPURAM 695034

NIT Building, Second Floor, Gokulpat Market, NAGPUR 440010

Institution of Engineers ( India ) Building, 1332 Shivaji Nagar, PUNE 411005

26 23 05

621 17

52 51 71

32 36 35

‘Sales Office is at 5 Chowringhee Approach, P. 0. Princep Street, CALCUTTA 700072

TSales Office is at Novelty Chambers, Grant Road, MUMBAI 400007

*Sales Office is at ‘F’ Block, Unity Building, Narashimaraja Square, BANGALORE 560002

27 10 85

309 65 28

222 39 71

Printed at New India Printing Press, Khurja, India

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.

r;: *MENDMENT No

0!!!3:@Y/ “%

IS: 4939 ( Part 2 ) u1984

1 DECEMBER 1985

TO

SPECIFICATION FORFOAM ‘CONCENTRATE FOR PRODUCING

MECHANICAL FOAM FOR FIRE FIGHTING

PART 2 AQUEOUS FILNIFORMING FOAM ( AFFF )

[ Page6, Table 1, S1 No,, ( viii ),CO13 and4J–Substitute’3400 .’for,s-yand~_9 for ‘ 3’00’.

. . ..—-4------’U. L ?’,.KtiURJ~

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t“..

—

GirlAMENDMENT NO.2 FEBRUARY 1987 7

1S:4989 (PartCONCENTRATE FOR

To

2)-1984 SPECIFICATION FOR FOAMPRODUCING MECHANICAL FOAM FOR FIRE

FIGHTING

PART 2 AQUEOUS FILM FORMING

(Page 4, clause 0.4.1, line‘50°C’ for ’40~

FOAM (AFFF)

6) - Substitute

(Page 4, clause 0.4.1) - Add the followingsubclause:

‘0.4.2 This standard contains clause 4.1 whichcalls for agreement between the purchaser and thesupplier which require the purchaser to specify thedetails of containers at the time of placingorders. Indian Standardfor polyethylenecontainersfor AFFF is under preparation and this clause willbe reviewed after that standard is published.’

(Page 5, clause 4) - Substitute the followingfor the existing clause:

‘4. PACKING

4.1 AFFF “concentrate shall be packed in (

polyethylene containers of specifications as agreedto between purchaser and supplier.’

(Page 5, Foot-notes:) - Delete all thefoot-notes.

[(page 6, Table 1, S1 No. (i), CO1 4)] -Substitute ‘8’ for ‘7.5’.

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‘ED[(Page 6, Table 1, S1 No. (ii), CO1 3 and 4) 5

Substitute ‘1.00’ for ‘0.80’ and ‘1.l~for ‘1.1O’.

[(page 6, Table 1, S1 No. (vi), CO1 2)] -Substitute ‘Pour point’ for ‘Freezingpo~.

(page 7, clause A-1.1, line 3) - Substitute‘50*1°C’ for ‘45*1”C’.

(Page 8, clause B-1.1, line 3) - Substitute‘pyknometer’fo~~kometer’.

(page 9, clause D-1.2, line 1) – Substitute‘50*1°C’ for ‘45-&1°C’.

(Page 9, clause D-1.2, lines 2 to 4) -Substitute ‘temperature of’ for ‘room temperatureat’ appearing at two places.

(Page 10, Appendix E, title) - Substitute‘Pour Point’ for ‘Freezing Point’.

[(Page 12, clause E-2.1 (a), line 1)] -Substitute ‘shaked’ for ‘mixed’.

[(page 12, clause E-2.1 (e), line 5)] -Substitute ‘-5”(J?for ‘()”c~.

(Page 12, clause F-1.1, line 2) - Substitute‘7.5 litres per minute’ for ‘7 litres per minute’.

(Pages 13 to 15, caption of Fig. 2) -Substitute ‘7.5 l/rein’for ‘7 l/rein’.

(Page 13, Fig. 2B) - Indicate the conedimension at the end as ‘0.5 approx’.

(Page 14, Fig. 2C) - Indicate the details ofholes as #1.25+0.25 with

-cltriangular pitch of

‘2.5~0.25’.

J- -2- -1

r ...

-m

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_.. _.) ...

‘m(Page 16, Fig. 3,

LPM’ for ‘7 LPM’.

[(Page 17, clausewords ‘of size 180-yIm‘mesh’

(Page 17, clausewords ‘gently with the

7,legend) - Substitute ‘7.5

G-l(b), line 1)1 - Add theIS Sieve’ after the word

G-2.1, line 3) - Add thehelp of~suitable goose—

neck’ after the word ‘nozzle’.

(Page 17, clause G-2.1, lines 6 and 8) -Substitute ‘petrol’ for ‘alcohol’.

(Page 18, clause G-2.1, line 1) - Substitute‘shall’ for ‘should’.

(Page 18, CkW3eG-2.-l~ lines 3 to 5) - Deletethe sentence ‘In cases of .......... 5 minutes.’

[page 19, clause H-3.3 (c)~ line 3] -Substitute ‘layer’ for ‘larger’. —

(page 22, clause K-2.1(c) line 1 - substitute‘allow’ for ‘collect’.

(Page 23, clause L-1.1) - Add the followingnew Note below the clause:

‘NOTE - “Beforetest it shall be ensured thatinside surface of the steel tank is clear,free from rust and even without anyprojections or dents.’

(Page 23, clause L-2.1, line 2) - Add thewords ‘within 30 seconds’ after= word ‘petrol’.

L

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),. ...

“ El! (Page 23, clause L-2.1, line 4) - Add the~words *and direction’ after the word ‘level’.

(Page 23, clause L-2.1, line 5) - Add thefollowing additional sentence at the end:

‘The velocity of wind shall not exceed16 km/h.’

(Page 23, clause L-3.1, line 1) - Add thewords ‘within 30 seconds of pou~’ after the word‘petrol’.

(Page 23, clause L-3.1, second sentence) -Substitute the following for the existing sentence:

‘Watch for further 60 seconds at the end ofwhich time fire shall be fully extinguishedautomatically without any licks.’

(Page 23, clause L-3.1, Notes 1 and 2) -Delete.

(-24, clause M-1.1, line 1) - Substitutethe word ‘area’ for ‘are’. —

(Page 24, ~. 5) - Make the followingmodifications:

“a)

b)

c)

d)

L

Substitute ‘200 ‘ for the dimension ofheight o-ftray ‘1OO’.

Add along with the legend ‘TRAY’, ‘(Made of3 mm thick min. m.s. sheet reinforcedsuitably at the top) fixed with a handle’.

Add along with legend ‘Angle Iron?‘(38x38x6rein)’.

Delete ‘valve as shown in:~figure bet-.gas pipe and G.I. pipe’.

,.—

4

-4-

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‘i.

“ m -1e) Add along with legend’......~ 2’ and of

steel into its free end gas tight sealedwith dome nut and connected to a $ 12.5G.I. pipe bent further as inverted U shapedwith its end connected to nozzle and spigot(not shown in figure).

f) Add along(25x3 rein).

g) Add themillimetres’

with legend ‘MS strip’

words ‘All dimensions injust above the caption.”

(Page 25, clause M-3.1, line 6) - Add the word‘fully’ after the word ‘line’.

(BDC 22) -5-

... .

Reprography Unit, 1S1, New Delhi, India

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AMENDMENT NO. 3 AUGUST 1999 TO

IS 4989 ( PART 2 ) : 1984 SPEClFICATION FOR FOAM CONCENTRATE FOR PRODUCING MECHANlCAL

FOAM FOR FIRE FIGHTING

PART 2 AQUEOUS FILM FORMING FOAM (AFFF)

(Page 4, &use 0.4, Iine 5 ) - Insert ‘Fh~oro Protein Foam in Part 3’ after ‘Pa rI 2’.

( Puge 4, clallse 0.4.1, line 2) - Insert ‘system’ after ‘mobile’.

(Pclge 4, clflrrse 1.1, line 1 ) - Insert ‘chemical’ after ‘physical’.

( Page 5, cluttse 3.1, line 3 ) - Substitute ‘stoppered cylinder for 24 hours’ li)~ ‘cylinder’.

( Pcfge 6, cltrrrse 6.1 ) - lnscrt lhe following:

‘6) Do not store in direct sunrays.’

1 Pqc 6, TdAe I, SI No. (i), cd 4 ] - Substitute %.~‘/br ‘7.5’.

1 Pctgc 6, Ttrhle 1, SI No. (iv), co1 2 trnd 4 1 - Substitute ‘27 * l’c and ‘10 &I for ‘40 CSt’.

‘27 2 5’~’ jbr

[ Pcrge 6, 7irble 1, SI No. (vi), cd 4 ] - Substitute 'O'C' for ‘ - s’c’.

[ Pcrge 7, Tcthle 2, SI No. (i) and (ii), co1 2 ] - Substitute ‘27 z S’C /or ‘17% l(‘C’.

1 Prtge 7, Ttrhlc 2, Sl No. (ii), cd 3 ] - Substitute ‘2 Min' jar ‘70 SNWKIS’.

( Puge 8, clnrrse Ii-l.1 ) - Insert ‘or hydrometer’ after ‘gravity bottle’ in last line.

( Page 9, cl,trtse D-1.1, Snmplc B ) - Substitute ‘300 ml’ for ‘250 ml’ and ‘500 ml capacity stoppered conical flask’ for ‘300 ml thermal resistant glass bottle’.

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Amend No. 3 to IS 4YXY ( I’srt 2 ) : 1984

( Page 9, c1c~c.r~ D-2.1 ) - Substitute the following for the existing para:

‘Clean, dry and weigh cmlrifuge tube.’

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

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

Sludge content, percent = Weight of sludge content of the sample

Volume of foam (50/100 ml) x Sp.Gr. x 1 00

[ Page 12, cLzu.re E-2.1(e) ] - Substitute 'O'C' for ‘-5’C’.

( Page 17, Appen& G ) - Substitute ‘Heptane’ for ‘Petrol’ wherever appears.

( Purge, 20, clnnse J-2.2 ) - Substitute ‘27 2 5’C’ for ‘27 * l°C’. Delctc last sentence and add ‘Direct the jet of foam at centre of foam collector board about 15 cm above the central foam guiding vanes. Distance between foam making nozzle and foam collector board should be 3 f 0.1 m’.

( Page 20, clrlrrse J-2.3, Formula ) - Substitute ‘1000’ li)r ‘1400’.

( Pclge 22, clnrrse K-l .1 ) -Substitute the following for the existing clause:

‘Foam collector cylinder - size 16 cm dia x 5 cm deep (capacity - 1 000 mt) - One nundxr. The foam collecting cylinder should either be made of transparent plastic (potypropytene) or glass graduated up to the bottom with minimum 10 cm graduation.’

[ Puge 22, cltrclse K-2.1(r) ] - Substitute the following for the existing:

‘Collect the foam in foam collection cylinder and start the stop watch for noting down the drainage time.

‘d)

[ f’clge 22, &rise K-2.1(d) ] -Substitute the following for the existing one:

Level off the foam collected in the cylinder immediately as it is filled up to the brim.

( Page 22, chtse K-2.1(e) ] - Delete.

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Amend No. 3 to IS 4989 ( Part 2) : 1984

[ Page 22, &use K-2.1(g) ] - Substitute ‘1 OOO’for ‘1400’.

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

[ Page 23, clause L-2.1 ( see also Amendment No. 2 ) ] - Substitute ‘5 km/h’ fir ‘16 km/h’ .

(Page 25, clause M-3.1, line 1 ) - Substitute ‘Heptane' for ‘petrol’.

(CED22)

Reprography Unit, BIS, New Delhi, India

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AMENDMENT NO. 4 SEPTEMBER 1999 TO

IS 4989 ( PART 2 ) : 1984 SPECIFICATION FOR FOAM CONCENTRATE FOR PRODUCING MECHANICAL



[ Page 6, Table 1, Si No. (vii) ] - Delete SI No. (vii).

(Purge 7, Table 2 ) - Insert the following in the end:

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

‘9 Film formation I’orms aqueous Cilm - Appendix G ’

(CED22) Kcprography lj,,:., BIS, New Drll~i. India

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AMENDMENT NO. 5 DECEMBER 2002TO

IS 4989( PART 2 ) : 1984 SPECIFICATION FOR FOAMCONCENTRATE FOR PRODUCING MECHANICAL



[ Page 7, Table 2, S1No. (ii)] — Substitute the following for the existing:

(1) (2) (3) (4) –(5)

ii) 25% drainage time 120 sec — Apyendix K

( Page 22, Appendix K ) — Substitute the following for the existingAppendix:

APPENDIX K

[ Table 2, S/ No. (ii)]

DETERMINATION OF EXPANSION AND DRAINAGE TIME

K-1 APPARATUS

K-1.l Plastic Collecting Vessel — of volume known to t 1 percent equippedwith a bottom discharge facility.

K-1.2 Foam Collector — for expansion and drainage measurement, as shownin Fig. 6. Stainless steel, aluminium, brass and plastics are suitable materials forthe collection surface.

K-1.3 Foam-making Nozzle — when tested with water, has a flow rate of7.5 l/rein at a nozzle pressure of (7 + 0.3) bar.

K-1.4 Foam Solution Tank — conneeted to the nozzle.

K-2 TEMPERATURE CONDITIONS

Carry out the tests under the following temperature conditions:

Air temperature: (15 f 5)”C

Foam solution temperature (17.5 t 2.5)”C

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Amend No. 5 to 1S 4989( Part 2 ) :1984

The nominal lease angle of

---- ---- -

----- ___

.-. -. : .-_--—_-

--:-——-. . _

- -_—---——--

D

—E

All dimensions in millimietres. ‘.

‘thepostis 11O.

Key

A Drainage pot

B Stand

C Transport tube, 30 mm to 50 mm long

6 mm to 8 mm boreD Dischargeoutletclosure

E Measuring cylinder

FIG. 6 COLLECTING VESSELFOR DETERMINATIONOFEXPANSION ANDDRAINAGE TIME

2

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Amend No. 5 to IS 4989 ( Part 2) :1984

K-3 PROCEDURE

Check that the pipe work and hose from the foam solution tank (K-1.4) tothe nozzle (K-1.3) is completely full of solution. Set up the nozzlehorizontally, directly in front of the foam collector (K-1.2) with the front of thenozzle (3 i 0.3) m from the top edge of the collector. Wet the collecting vessel(K-1.1) internally and weigh it (ml). Set up the foam-making nozzle and adjustthe nozzle pressure to give a flow rate of 11.4 l/m. Discharge foam and adjustthe height of the nozzle so that the discharge strikes the collector centrally. Keepthe nozzle horizontal. Stop foam discharge and rinse all the foam from thecollector. Check that the foam solution tank is full. Start discharging foam and,after (30 f 5) s to allow the discharge to stabilize, place the collecting vessel,with the discharge outlet closed, below the collector. As soon as the vessel isfull, remove it from the collector, strike the foam surface level with the rim andstart the clock weigh the full vessel (m2,).

Calculate the expansion E from the equation:

E= ~m2–ml

where

V is the volume, in litres, of the collecting vessel ( K-1,1);

m, is the mass, in kilograms, of the empty vessel; and

m2 is the mass, in kilograms, of the full vessel,

Assume that the density of the foam solution is 1.0 kg/1.

Open the drainage facility (see K-1.1) and collect the foam solution in themeasuring cylinder to measure the 25 percent drainage time. Adjust thedrainage facility such that the drained foam solution may flow out whilstpreventing the passage of foam.

NOTE — T% may be achieved by controllingthe level of the liquid foam interfaceintheplastics tubeat theouttet.

( Page 23, clause L-2.1, last line) — Substitute ‘15 cm’ for ’30 cm’.

( CED 22 ) .ReprographyUnit, BIS, New Delhi, India

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AMENDMENT NO. 6 MARCH 2005TO

IS 4989 (PART 2) :1984 SPECIFICATION FOR FOAMCONCENTRATE FOR PRODUCING MECHANICAL



[ Page 22,Appendix K, clause K-2 (seealso Amendment No. 5)] — Delete‘Air temperature (15 f S)°C’ and substitute ‘(27 f 5)°C’for ‘(17.5 f 2.5)°C’.

[ Page 22, Appendix K, clause K-3 (see also Amendmeru’No. 5 ) ] — Inline 6, substitute ‘7.5 I/m’ for ‘11.4 I/m’.

( CED 22 )~prography Unit, BIS. New Delhi, India

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Is-4989_2 Foam Concentrate

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Transcript of Is-4989_2 Foam Concentrate