IS 14609: Dry Chemical Powder for Fighting A,B,C, Class Fires--Specification

24 Pages·1999·2 MB·English

by  Bureau of Indian Standards (BIS)

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IS 14609 (1999, Reaffirmed 2010): Dry Chemical Powder for
Fighting A,B,C, Class Fires--Specification. ICS 13.220.10
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
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“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
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IS 14609 : 1999
REAFFIRMED 2010
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Indian Standard
DRY CHEMICAL POWDER FOR FIGHTING
A,B,C, CLASS FIRES - SPECIFICATION
Ies 13.220.10
© BIS 1999
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG
NEW DEUlI 110002
February 1999 Price Group 7
AMENDMENT NO. 1 FEBRUARY 2003
TO
IS 14609: 1999 DRY CHEMICAL POWDER FOR
FIGHTING A, B, C CLASS FIRES - SPECIFICATION
( Pa8~ 2. c!(lIt!,e 4.6.1) - Substitute the following for the existing:
'4.6.1 Procedure
Take 100 g of powder in a 250 ml beaker and store the beaker in an atmosphere
A
having relative humidity 90 percent at 271 20C for a period of 6 h. Then transfer
the same to a desicator containing sulphuric acid (98% w/w H2S04) for a period
of 24 h. Observe the fonnation of any caking or lump fonnalion, allow it to
drop from a height of 200 mm on a smooth hard surface. The lump shall be
friable to pass the requirements given in 4.4.'
( Page 3, clause 4.6.2.1 lines 1 to 3 ) - Substitute the following for the
existing lines:
'Place 100 8 sample of powder in a nickle crucible shaped cup of suitable
capacity .•
( Page 5, Fig. 4) - Substitute 'dia 26' for 'dia 16' and 'I (XX) cc' for '500 cc·.
( Page 6. Fig. 5 ) - Height of tray shall be 200 mm.
( Page 10, clause 8.1 ) -Insert the following after(e):
f) Base material and its percentage.'
(CED 22)
Reprography Unit. DIS. New Delhi. India
AMENDMENT NO. 2 SEPTEMBER 2003
TO
IS 14609: 1999 DRY CHEMICAL POWDER FOR
FIGHTING A, B, C CLASS FIRES - SPECIFICATION
( Pag~ 1, cltuu~ 4.3) - Insert the following matter at the end of the clause:
O1emical content of the declared base material shall be checked as per the procedure
given below.
4..3.1 The method is intended to determine the mono-ammonium phosphate
content of a multipurpose chemical fire extinguishing agent which may contain
wacerproofing and fluidizing agents and other materials required for satisfactory
perfonnance. It is not applicable to products containing other alkali phosphates
or water alcohol soluble compounds which react with aqueous sodium
hydroxide.
Ul Apparatus
The following apparatus shall be used:
A = analytical balance, capable of weighing accurately to 0.1 mg;
8 ::z centrifuge tubes, lOQ..ml capacity preferably cone-shaped;
=
C centrifuge~
D = steam bath, capable of maintaining approximately 80°C;
=
E pH meter or titrimeter;
F = burette, 5-ml capacity, graduated in 0.1 mt divisions, alkali-resistant
stopcock; and
G = oven, vacuum, capable of operating in the range of 6OOC.
4.3.3 Reagent grade chemicals shall be used, unless otherwise indicated. Other
grades may be usc:d. JXOvided it is first asceruined that the reagent is of sufficiently
high purity to permit its use without lessening the accuracy of the determination:
A = absolute or denatured ethanol (a reagent blank is required, if denatured
alcohol is used);
B = 50% ethanol - Mix. 1 volume of absolute ethanol (or appropriate
volume of denatured ethanol) with 1 volume of water; and
Amend No. :2 to IS 14609 : 1999
C == sodiuM hJ'dro:ddlf(l.O mo.lll),. 'DissOlve ~ to 45 g. 'Qf NaOH in one
litre of water. Standardize potentiometrically against primary standard
~~acld ph~"t& .. ;; \ ~ .. '.; . ,)(. .• ,. , .'
4.3.4 Weigh to the nearest a.1' mg: ~pProximately 3 g ofsampte $'M' ~ l00-ml
centrifuge tube. Add 50 ml of 50 percent ethanol and mix well. Support the
centrifuge tube in' a steam bath set 'at approximately 80° for about 5 min with
, fmqur~ntpcriods of Yig<mlS shaking.
4.3.5 Place the warm rubes in wanned centrifuge tube holders aOO centrifuge at
appuxi.mat.ely 1 SOO.rlmin fa" 5 mm. Without ,dday decant the~
quantitatively (with the aid oh little water} iDeo a W-ml beaker. Repeal the ~n
twice men transferriDg the extracts to the ooginal 250-ml beaker or wlil w:n~ &urns
white or narum.l oolour. .
, 4..3.6 Evaporate the extracts to cfryrless 00 a steam bath with the. aid of a ~t of~ ..
4.3.7 Dissolve the dried residue in approximately 75-ml water and titrate
potentiOOldrically with the standardized NaOH solution using a pH meter fttViously
standardized at pH 7.0. Add the NaOH in iracmeru of 1.1 ml near the equivalen£e
point (8.05). Plot pH readinp venus ml of NaOH added and determine the
equivalence point as the midpoint of the inflection in the titration curve (PH 8.05 ± 0.02).
4.3.8 Calculate the mooo-ammoniurn phosphate content., percent by mass; AS follows:
where
=
A volume of NaOH used (corrected for any blank), in ml;
B = concentration of NaOH. in moVl; and
W= mass of sample as received, in g.
( Pa~ 11, clause .8-2.1, liM 10) - Insert 'percentBge of base mataiaJ' afirr the
wads 'free flowing'. ; ,~'
( CE.D22)
Reprography Unit, 81S. New Delhi. ladja
2
AMENDMENT NO. 3 APRIL 2005
TO
IS 14609: 1999 DRY CHEMICAL POWDER FOR
FIGHTING A, B, C CLASS FIRES - SPECIFICATION
( Page 7, clause 4.12.1.1 ) - Insert the following after 'indoors':
'or put 8 feet high mild steel sheet enclosing 3 sides'
( Page 7. clause 4.12.1.1 ) - Add the following 'NOTE' at the end:
'NOTE - Provision has been made till infrastNcture is developed for indoor test facilities.'
to.
( Page claust 4.12.2.3, Note 2 ) - Substitute 'Halo calbon clean agent' for
'Halon 1211'.
CED22 )
Reprography Unit. DIS. New Delhi, India
AMENDMENT NO.4 AUGUST 2007
TO
IS 14609: 1999 DRY CHEMICAL POWDER
FOR FIGHTING A, B, C CLASS FIRES
SPECIFICA TION
(Page I, clause 4.3,Ji/ih linc):
a) Substitute 'minimum' .li)r 'more than' before 50 percent.
b) Delete last sentence 'The allowed .•...... constituents.'
(CED 22)
I{c!)rllgraph~ 111111. IllS. Nc\\ Deihl 1\1\l\a
AMENDMENT NO.5 NOVEMBER 2008
TO
IS 14609 : 1999 DRY CHEMICAL POWDER FOR
FIGHTING A, B. C CLASS FIRES -
SPECIFICATION
(Page I, c1awe 4.1) - Substitute 'The apparent density of the dry
chemical powder when determined by the method given in 4.1.1 shall be within
=*:10% of manufacturer's declared value in glm)' fol' 'The apparent density
.......... 1.10 glml'.
(Page t, clause 4.4) - Substitute the following for existing:
'4.4 Particle Size Distribution
Percentage retained on 100 mesh sieve, 200 mesh sieve and 325 mesh sieve
shall be within ± 10 % of the manufacturer's declared value. Percentage retained
011 40 Mesh Sieve Bottom Pan to be deleted.
Procedure - The procedure for particle size distribution shall be as follows:
Apparatus - The apparatus shall comprise the following items:
c) Three sieves (100, 200 and 325 mesh) with a lid bottom pan.
d) Sieve-thaking device, capable of holding sieves and moving the nest in
a horizontal ellipse' with an impact from the bottom to the top of the
nest continuously.
Test Procedure
Weight approximately 200 g of powder in to the top sieve. Assemble on the
shaking device and shake for 10 min. Weigh the quantity of powder retained on
each sieve and report as percentage retained on each sieve.'
(Page 1, clawe 4.5.1, line 4) - Substitute 'absorption does not exceed 2.5
percent' for 'absorption does not exceed 1.5 percent'.
(CED22)
R.eprosrIphy Unit, 81S, New Delhi. IDdia
Fire Fighting Sectional Committee, CEO 22
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Fire
Figllling Sectional Committee had been approved by the Civil Engineering Division CounciL
Fire fighting dry chemical powder meeting this standard is used in dry chemical powder fire extinguishers,
fixed installations and mobile fire tenders for fighting classes A, B, C, fires. However, dry chemical powder
for fjghting class Band C fire are covered under JS 4308: 1982 'Specification for dry powder for fire fighting
(jirsl revisioll)' and fire involving reactive metals that is, class D fires as also radioactive metals are separately
covered under IS 4!S6l;1984 'Specification for dry powder for fighting fires in burning metals (first revision)'.
The efficiency of a dry chemical powder for extinguishment is governed by its physical properties and chemical
(()mposition. Particle size of the powder is an important characteristic to determine its fire knock down
properties when used in extinguishers. Therefore tine and coarse powder panicle must be balanced while
manufacturing this powder. The dry chemical powder is generally composed of hasically mono ammonium
phosphate or ammonium poly phosphate and ammonium sulphate mixtures with additives to make it water
repcllant, free flowing and conforming to various requirements of this standard. While selecting the various
raW materials for the manufacture of this dry chemical powder, it shall be ensured that these are non-toxic,
non-corrosive, non-abrasive and electrically non-conductive.
In the following situations, the application of dry powder covered in this standard should not be considered
satis factory:
a) Fires involving chemicals-containing their own oxygen supply such as cellulose nitrate, etc.
h) Fires involving radio-active metals sUl:h as Radium, Uranium, Polonium. etc.
c) Areas where residual deposits of the powder may adversely affect electronic cquipments or delicate
electrical relays.
This standard is fonnulated to provide guidance regarding selection of materials and requirements in regard
III the quality of dry powder for other than in burning metals. The various tests for class A. B. C, fires
incorporated in this standard are based on the studies conducted at the Defence Institute of Fire Research.
New Delhi anti also taking into consideration the international standards such as ISO, EN, UL. etc.
The composition of the technical committee responsible for the formulation of this standard-is given at Annex C,
!:or the purpose of dc(iding whether a particular requirement of this standard is complied with the final
VitlUC. ohserved or calculated exprcssing the results of a test or analysis, shaH be roun'ded off in accordance
with IS 2 : 11)60 'Rules for rounding off numerical values (revised)', 111C number of significant places retained
in the rounded off value should be the same as that of the specified value in this standard.