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Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 11833 (1986): Specification for dry powder fireextinguisher for metal fires [CED 22: Fire Fighting]
IS : 11833 – 1986
Indian Standard :~. ~t:~~n
R e a f f i r m e d 2 0 0 7
SPECIFICATION FORDRY POWDER FIRE EXTINGUISHER FOR
METAL FIRES
(First Reprint OCTOBER 1996)
UDC 614.844.1
© Copyright 1987BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAH ADUR SHAH ZAFAR MARG
NEW DELHI 110002
Gr 3 May 1987
IS : 11833 • 1986
SPECIFICATION FORDRY POWDER FIRE EXTINGUISHER FOR
METAL FIRES
Fire Fighting Sectional Committee, BDC 22
West Bengal Fire Services, Government of WesrBengal
State Bank of India, BOtnbaYCent ral 1ndustri.rt s~CU( ity Force, Ministry of
Horne Ailair s
Ministry of Railways
Ministry of Defence ( ()G J )Steel Authority c f India Ltd ( Bokaro Stee
Plant ). Bokaro Steel CityOil and Natural Gas Commission, Dehr.i Dun
Representing
Gujarat Electricity Board, Vadcdara
Chairman
SURI G. B, !\1ENON
MembersLT-COL V. It. B.-\NAHATISHll.l S. R. BANSAL
SHRI R. L. CHAUDHRYSHRI B. K. SIPPY ( Alternate)
SURI K. K. l)AS GUPTA
SHRI S. M. DESAIDEPUTY INSPECTOR GENERAL
( FIRE)ASSiSTANT !NSPf.CTOR GENEItJ\L
( FIRE) ( Alternate)DEPUTY l~sPECTOR GENERAL
(RPSF)A~SISTANT SECURITY OFFICER
( ~JRE ). NOR'Jl-IER~ RAILWAY ( Altl..·rJ10/C)SUR1 S. K. DIIERI Municipal Corporatlon of Delhi (Delhi Fire
Service ), DelhiSHRI R, K. BHARD\VAJ ( Alternate )
SURf R. R. ))1I0ULEY Bhabha Atomic Research Centre, BombayDIRECTOR IIo1l1C Department (Fire Service). Government
of Ta mi l Nadu .
Ministry of Horne Aff.iirsStecl.ige Industries Ltd (t\-1ininlax Division ),
Bombay
DEl'UTY DIRECTOR ( Alternate )DIRECTOR GENERAL OF FIRE HOOle (Poli('c Dcpartrnent ), Government of
Si-:RVfCFS Andhra PradeshDEPUTY DtI~ECTOR ( FIRE Srnvtcrs )
( Alternate )FI:tE AnV(~ER
SHRI J. S. JAMsHroJ(
SHRI c. GNANI{.\J ( ,·t!It'J"11111e )
( COllI inned on rage 2 )
\,(1 C't.J/,YrI'ght I YS7BURt'A1J ()F IN[)IAN STANIJARDS
This publication is prr-tect cd tinder the In.lian Co pvriglit Act (XIV of 1957) andj . rcoroduct ion in whole (II' in "art by a nv means CX,,'ctH with written permission of the
publisher sha II be deemed to be an i nfri :~~~crllcnt of coryrig~lt LInder t he s.iid Act.---_..-----------------------------'
IS : 11833 • 1986
( Coniinued from page 1 )
Steel Authority of India Ltd (Rourkela SteelPlant ), Rourkela
MembersSARI P. KHANNASHRI S..N. KUNDUMANAGING DIRECTOR
RepresentingJaya Shree Textiles and Industries, RishraFire and Safety Appliances Co, CalcuttaAvon Services ( Production and Agencies) Pvt
Ltd, BombayTF.CHNICAL EXECUTIVE ( Alternate )
SHRI P. N. MEHROTRA The Institution of Fire Engineers ( India), NewDelhi
SHRJ B. R. MEHTA ( Alternate)BRIG S. A. MOI.H.E Ministry of Defence (R & D)
SHRI A K. SURf ( Alternate)SHRI M. MUKIIERJI
Synthetics and Chemicals Ltd, BareillvSurex Production and Sales ( P ) Ltd, CalcuttaDirectorate Gt~neral of Technical Development,
New DelhiTariff Advisory Committee, Bombay
Urban Development, Pub-lie Health and Housing.Development. Government of Maharashtra
Director General, BIS ( Ex-officio Member)
Directorate General of Supplies and Disposals.New·Delhi
SURf D. S. NARESII ( Alternate)SHRJ T. P. SHARMA Central Building Research Institute, Roorkee
SHRI A. K. GUPTA ( Alternate)SHRI n. K. SIRKARSIIRI TARIT SURSHRI SUSHIL KlJMAR
SHRI C. D. SHARMA ( Alternate)SHill V. B. NIKAM Municipal Corporation of Greater Bombay
( Bombay Fire Brigade ). BombaySHRJ H. M. SABADRA Reliable ( Fire Protection) Industries, BombaySHRI P. H. SETHNA Koovcrji Dcvshi and Co ( P ) Ltd, Bombay
SURf N. T. PANJWANI ( Alternate)SHRI B. J. SHAH N ewase Industries, Surendranagar ( Gujarat )
SHRI A. M. SHAH ( Alternate)SHRI CHANDRAKANT M. SHAH Zenith Fire Services, Bombay
SURI M. H. SHAH ( Alternate )SHRI R. C. SHARMA
SHRI J. N. VAKJlSHRI K. RAVI ( Alternate)
SURl B. V. WAGi.~
SARI G. RAMAN,Dircctor( Civ Engg )
Secretary
SHRI K. M. MATHUR
Joint Director ( Civ Engg ), BIS
( COlltin~ed 011page] J )
2
AMENDMENT NO.1 MARCH 2002TO
IS 11833 : 1986 SPECIFICATION FOR DRY POWDERFIRE EXTINGUISHER FOR METAL FIRES
( Page 3, clause 0.3 ) - Insert the following new clauses after 0.3 andrenumber the subsequent clause:
'0.4 A scheme for labelling environment friendly products known to be as ECOMark has been introduced at the instance of the Ministry of Environment andForests (MEF). Government of India. The ECO Mark would be administered bythe Bureau of Indian Standards (BIS) under the BIS Act, 1986 as per theResolution No. 71 dated 21 February 1991 and No. 425 dated 28 October 1992published in the Gazette of the Government of India. For a product to be eligiblefor marking with ECO logo. it shall also carry the standard Mark of BIS besidesmeeting additional optional. environment friendly requirements. For thispurpose. the Standard Mark of BIS would be a single mark being a combinationof the lSI Mark and the ECO logo. Requirements to be satisfied for a product toqualify for the DIS Standard Mark for BCO friendliness being included in therelevant published standards through an amendment. These requirements areoptional; manufacturing units are free to opt for the lSI Mark alone also.
The amendment is based on the Gazette Notification No. 160 dated 1 April 1999for Fire Extinguishers as environment friendly products published in the Gazetteof Government of India. t
( Page 10, clause 12.2 ) - Insert the following new clause after 12.2 andrenumber the subsequent clauses:
'13 OPTIONAL REQUIREMENTS FOR ECO MARK
13.1 General Requirements
13.1.1 Any fire extinguisher having BIS Standard Mark qualifies forconsideration of ECO Mark.
J3.1.2 The products manufacturer must produce the consent clearance as perprovision of the Water (Prevention and Control of Pollution) Act, 1974, Water(Prevention and Control of Pollution) Cess Act, 1977 and Air (Prevention &Control ofPollution) Act, 1981 respectively, along with authorization if requiredunder Environment {Protection) Act, 1986, and the Rules made thereunder to theBureau of Indian Standards while applying for ECO Mark.
Amend No.1 to IS 11833 : 1986
13.1.3 The products may display in brief the criteria based on which the producthas been awarded ECO Mark.
13.1.4 The product may carry along with instructions for proper use so as tomaximize product performance with statutory warning, if any, minimize wasteand method of safe disposal.
13.1.5 The material used for product packaging (excluding refills) shall berecyclable, reusable or biodegradable.
13.1.6 The product must display a list of critical ingredients in descending orderof quantity present in percent by weight. The list of such critical ingredientsshall be identified by the Bureau of Indian Standards.
13.2 Specltk Requirements
13.2.1 The fire extinguisher shall not contain any Ozone Depleting Substance(ODS) relevant to fire extinguishers industry as identified under the MontrealProtocol (Annex A).
13.2.2 Gas based extinguishing media once discharged in the atmosphere shouldnot have atmospheric life time of more than a year (Annex B).
13.2.3 Chemical used should not have global. warming potential (Annex C).
13.2.4 The metallic body and other metal parts of the fire extinguishers shall befree of lead or lead alloys.
13.2.5 The coating used for the metallic part shall not be formulated withmercury and mercury compounds or be tinted with pigments of lead, cadmium,chromium VI and their oxides. Excluded are natural impurities entailed by theproduction process up to the amount 0.1 percent by weight which are containedin the raw material.
NOTE - CO2 extinguishers may be permitted till suitable substitutes are available.
2
Amend No. J to IS 11833: 1986
ANNEX A( Clause 13.2.1 )
LIST OF OZONE DEPLETING SUBSTANCES (ODS) CONTROLLEDBY MONTREAL PROTOCOL
Trade Name
I-Ialoo 1211Halon 1301Halon 2402CFC-liCFC-12CFC-113CFC-114CFC-115CCI4C2H3Cl3CFC-13crc.iuCFC-112CFC-211CFC-212CFC-213CFC-214CFC-215CFC-216CFC-217Methyl Bromide
ODP
3.010.06.01.0
1.00.81.00.61.10.11.01.01.01.01.01.01.01.01.01.00.6
NOTE- ODP values are relativetoCFC-IIwhichhas beenassignedarbitraryvalueof 1.0..
3
Amend No.1 to IS 11833 : 1986
ANNEX 8( clause 13.2.2 )
LIST OF ATMOSPHERIC LIFE TIME OF GAS-BASED AGENTS
Trade Name Designation AtmosphericLife Time (Year)
Haloo-13001 (CF 31) <1 dayNAPS III HCFC (Blend A) 12FE 25 HCFC-125 36FE 241 FCFC-124 6FE 36 HFC-227 fa 250FE 13 HFC-23 250FM200 HFC-227EA 41CEA410 FC-3-1-10 2600Halon 1301 Halon 1301 65Inergen 10541Argonite 1055Argon IOOl
ANNEXC( clause 13.2.3)
LIST OF SUBSTANCES HAVING GLOBALWARMING POTENTIAL (GWP)
Trade Name GWP (]OO year)VsC02
Halon 1301InergenArgoniteArgonCEA410FM200FE 13FE 36FE 241FE 25NAFSIIICF31
(CED 22)
5600
55003300
12 1008000
48032001 450
<5
--_.•.---,------Reprography Unit,BIS,NewDelhi, India
AMENDMENT NO.2 SEPTEMBER 2006TO
IS 11833 : 1986 SPECIFICATION FOR DRY POWDERFIRE EXTINGUISHER FOR METAL FIRES
[Page 10, clause 13, Title (see also Amendment No. l)t - Substitute'ADDITIONAL'for 'OPTIONAL'.
(CEO 22)
Rcprography Unit,DIS, New Delhi, India
AMI~:NI·)MI~~Nl~ N(). J AIJ(;tlsrr 2007rr()
IS 11833 : 1986 SP~:(~IFI(:A~rl()N F()I{ I)RY r()WI)I(I~
FIRE f~Xl~IN(;l.lISI-lf:l~ ~~()R M.:TAL., FII{I~S
(Page 5, clause 6) - Insert the following nCVJ subclause:
'"6.7 Braided rubber/plastic hose shall he having bursting pressure not less than50 kg/ern] '.
(CEf) 22)
Rcprogruphv Unit HIS. New Delhi, India
AMENDMENT NO. 4 FEBRUARY 2010 TO
IS 11833 : 1986 SPECIFICATION FOR DRY POWDER FIRE EXTINGUISHER FOR METAL FIRES
(Page 9, clause 11.1) ― Substitute the following for the existing:
“Each extinguisher body shall be painted either with epoxy powder coating or synthetic enamel paint. The shade shall be ‘Fire Red’ or ‘Post Office Red’ conforming to Shades No. 536 or 538 of IS 5.
NOTES
1 Whenever epoxy powder coating is applied on the external surface of mild steel body for anti-corrosive treatment, synthetic enamel paint coating is not required.
2 The body of extinguisher shall be of good finish, clear of all burrs and sharp edges.” (CED 22)
Reprography Unit, BIS, New Delhi, India
IS : 11833 - 1986
Indian StandardSPECIFICATION FOR
DRY POWDER FIRE EXTINC YTTSHER FORMETAL FIRES
o. FOR EW 0 R D
0.1 This Indian Standard was adopted by the Indian Standards Institutionon 29 August 1986, after the draft finalized by the Fire Fighting SectionalCommittee had been approved by the Civil Engineering Division Council.
0.2 Dry powder fire extinguishers for metal fires ( Class D fires) havespecial characteristics in view of the fact that these extinguishers arefilled with dry powder specially suitable for reactive metals and furtherin view of the high temperatures involved in burning metals, these extinguishers are able to discharge the contents with low velocity so as to .prevent blowing away of the burning metallic particles which can bedangerous, creating the fire elsewhere.
0.3 The extinguisher and components shall be designed taking intoaccount the working pressure required to achieve satisfactory performance under maximum pressure achieved at 60°C ambient temperatureor maximum pressure likely to be developed in the system with stoppageof powder flow due to obstruction, whichever is more.
0.4 For the the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test or analysis, shall be rounded off in accordance with IS: 2-1960·. The number of significant places retained inthe rounded off value should be the same as that of the specified valuein this standard.
1. SCOPE
1.1 This standard lays down the requirements regarding material, shape,construction, chemical charges, anti-corrosive treatment and tests fordry powder fire extinguishers for Class D fires ( fires due to burning ofmetals ), of capacities 10, 25, 50, 7S and 100 kg.
-Rules for rounding off numerical values (re"$~d).
3
JS : 11833 - 1986
2. CAPACITY
2.1 The total capacity of the dry powder extinguisher for metal whenfilled for the various capacities shall be as under:
Nominal Capacity Dry Powder Contentkg kg, Min10 1050 502S 2575 75
100 100
3. PRINCIPLE
3.1 The method of expulsion of dry powder .shall be by means of pressureproduced from compressed or liquefied gas from gas cylinder or cartridgeattached to the body.
4. MATERIALS
4.1 The material for construction of various parts of the fire extinguishershall be as given in Table 1.
s. SHAPE AND DIMENSIONS
cylindrical. The dimensions shall
Not more than 750
Not more than 750
175 + H)-5
Not less than 6
Not less than 3-15
Not less than 2
Thickness of ShellMaterial
mm
Outside Diameterof Bodymm
5.1 The shape of the body shall bebe as follows:
NominalCapacity
kg
10
2S1SOj75
100
NOTE - The minimum thickness of sheet takes into account the minimumthickness required based on bursting formulae and shall not be less than d/lOO,where d is the diameter of body in mm,
5.2 The neck ring shall provide a clear opening of not less than 75 mm( not less than 4S mm.in case of 10 kg capaci ty ) and shall have parallelscrew threads ( see 5.3 ) for effective length of not less than 2S rom.
S.3 The cap shall be threaded for fixing to the neck ring in the bodyfor not less than 20 mm effective length. The parallel threads shall be
4
IS : 11833 - 1986
m
Not less than 2
Not less tl!:.t n 3Not less than 5Not less than 8
mm
Not less than 20
Not less than 12·5
in accordance with IS : 554-1975*. At least 3 holes of not Jess than 3 rnrndia each shall be drilled through the threads of the cap to form vents forrelease of any pressure remaining in the body during withdrawal of thecap. The centres of the vent holes shall be 6'5 rom from the face of thecap joint washer.
5.4 Discharge hose shall be of the following dimensions:Capacity of Diameter LengthExtinguisher
kg
10}2550175 ~
lOOJ
5.5 The wheeled carriage except for 10 kg capacity, shall be as shown inFig. 1 and the lowest part of the body shall remain not less than 100 mmabove ground when in vertical position.
5.6 The drain plug provided shall have an opening of not less than25 mm diameter except for 10 and 25 kg capacity.
6. CONSTRUCTION ( see Fig. 1 )
6.1 The body shall be designed and constructed according to IS : 28251969"1" .
6.2 The domed ends of the body shall be without reverse of curvatureand shall be dished outwards to a radius not exceeding the internaldiameter of the body to which these are fixed.
6.3 Non-ferrous metal parts shall be brazed to the body.
6.4 The wheeled carriage shall be either integral with the body or shallbe as a separate carriage with proper locking/seating arrangement to thebody. .
6.5 A towing handle shall be provided on the body.. for easy manouevrability as per details given in Fig. 1.
6.6 Necessary supporting fixture for hose rest shall be provided on thebody.
• Dimensions for pipe threads where pressure tight joints are required on thethreads ( second revision ).
tCode for unfired pressure vessels.
5
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icat
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for
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for
pres
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vess
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for
inte
rmed
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and
high
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ture
serv
ice
incl
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ers
(fi
rst
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sion
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for
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(fif
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and
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t1
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(fo
urt
hre
visi
Oil
).
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peci
fica
tion
for
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edti
nb
ron
zein
go
tsan
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(se
con
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ion
).~Specification
for
free
-cu
ttin
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rass
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s,ro
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and
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for
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ater
fitt
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for
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ting
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rpo
ses
(se
cond
revi
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rm
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liS
peci
fk:a
tion
for
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sstu
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for
gen
eral
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rpo
ses
(th
ird
revi
sion
).~~Specjfication
for
gas
cart
rid
ge
for
use
infi
reex
tin
gu
ish
ers
(se
cond
revi
sion
).··
·Sp
ecif
icat
ion
for
seam
less
man
gan
ese
stee
lcy
lin
der
sfo
rp
erm
anen
tan
dhi
ghp
ress
ure
liq
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lega
ses
(fir
stre
visi
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pec
ific
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nfo
rv
alv
efi
ttin
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rco
mp
ress
ed'g
ascy
lin
der
sex
clu
din
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PG
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der
s(s
eco
nd
revi
sion
).
~ 00 ~ .... QO
(M CM ... \0 QC
Q\
r-NOZZLE (DOME BELL)
IS : 11833 - 1986
SAFETY VALVE
WITH CAP~
DRAIN PLUG(EXCEPT FOR 10 it 25 kg
CAPACITV)
//,.
APPLIC AfOR
rOWING HANDLE
tjOSE
MS TUBE OR ROD
or ~ 25 mm FITTED
IN STANDARO
BEARING
.- W HE E l WIT H 5a LID
RUBBER TVRE
c/>200)(50mm
N01-E 1 - For 2S kg and lesser capacity, gas cartridge 1)11 outside or insidemay be used.
NOTE 2 - For 10 kg capacity, trolley is not needed.
F'IG. 1 TYPICAL DETAllS OF DRY POWDER FIRE EXTINGlJISllERFOR METAL FIRES
IS : 11833 - 1986
7. EXPANSION SPACE
7.1 A space shall be provided above dry powder level in the body of theextinguisher. It shall be of sufficient volume to ensure that when discharge nozzle is temporarily closed and the extinguisher is operated at atemperature of 27 ± 2°C, the internal pressure shall not exceed 1·5 MN/m2 ( IS kgf/cm' ) and the body shall not show any sign of leakage.
8. APPLICATOR
8.1 The applicator shall be. fitted to the discharge end of the hose by acoupling. The applicator shall consist of an extended pipe, not Jess than1 m long, with a dome bell at its end and provided with deflecting vanesso as to sprinkle the powder.on the burning reactive metal surface, as alow pressure discharge, to give the performance characteristics stipulatedin 12.1.
9. ANTICORROSIVE TREATMENT
9.1 All internal surfaces of the body and other internal parts shall becompletely coated with zinc or Jead-tin in alloy ( tin nut less than 10percent) either by hot dipping process or by electrodeposition processor by phosphating, to a thickness of not less than 0·025 mm. The thickness of the coating shall be measured as per IS : 3203... )982*.
10. DRY POWDER CHARGE
10.1 The dry powder used shall conform to IS : 4861-1984t.
11. PAINTING
11.1 -Each extinguisher shall be painted fire red conforming to shadeNo. 536 of IS : 5-] 978t. All components of trolley and other items otherthan the fire extinguisher shall be painted with the primer and finishingpaints of two coats each.
12. TEST REQUIREMENTS
12.1 The extinguisher when operated with the applicator, at a temperature of 27 ± 2°C in still weather condition shall be capable ofdischarging minimum of 85 percent by mass of the actual rated capacity.
*Methods of testing local thickness of electroplated coatings (first revision ).tSpecification for dry powder for fighting fires in burning metals (first revision ):Colours for ready mixed paints and enamels ( third revision ).
9
IS : IJ833 - 1986
The contents shall be expelled in the form of steady stream low pressuredischarge which shall comply with the following requirements:
Capacity of Duration, SecondsExtinguisher, kg
10 20 to 3025 10,,4050 40 " 5075 50 " 60
100 70 " 80
12.2 The extinguisher shall be tested to an internal hydraulic pressure of3 MN/m2
( 30 kgf/cm2 ) for a period of 5 minutes, During test, it shallnot show any sign of leakage. In case of hydraulic burst the mechanicalfailure shall not occur below 4·5 MN/m! ( 45 kgf/cm" ).
13. MARKING
13.1 Each extinguisher shall be clearly and permanently marked withthe following information:
a) Name of the manufacturer or trade-mark, if any;b) Method of operation in prominent letters;c) The words '[)RY POWDER EXTINGUISIIER FOR METAL
FIRE';d) The capacity of the extinguisher in kg;e) The words 'RECHARGE AFTE~ USE';f) A declaration to the effect that the body of the extinguisher has
been tested to a pressure of 3-0 MN/m2 ( 30 kgf/CID2 );
g) Letter '0' indicating the suitability for 'Class D' fires;h) Year of manufacture; andj) Working and design pressure.
13.1.1 The extinguisher may also be marked with the Standard Mark.
NOTE - The use of the Standard Mark is governed by the provisions of theBureau of Indian Standards Act 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveysthe assurance that they have been produced to comply with the requirements ofthat standard under a well defined system of inspection, testing and qualitycontrol which is devised and supervised by DIS and operated by the producer.Standard marked products are also continuously checked by BIS for conformityto that standard as a further safeguard. Details of conditions under which alicence for the use of the Standard Mark may be granted to manufacturers orproducers may be obtained from the Bureau of Indian Standards.
10
Representing
Gujarat Electricity Board. Vadodara
Central Industrial Security Force, Ministry ofHOOle Affairs
IS : 11833 • 1986
( Continued from page 2 )
Fire Fighting Equipment Subcommittee, BDC 22 : 2
Convener
SHRI ~. B. MENON
Members
DEPUTY INSPECTOR GENERAL( FIRE)
ASSISTANT INSPECTOR GENERAL( FIRE) ( Alternate )
SHRI S. M. Df:SAI State Bank of India, BombaySHRI V. P. DEWAN Ministry of Defence ( DGI )
LT-COL V. R. BANAHATI ( Alternate)FIRE ADVISER Ministry of Horne AffairsSURI P. "N. MEHROTRA The InMit~JtjonofFire Engineers ( India ), New
Deihl -SHRI B. R. MEHTA (Alternate)
BRIG S. A. MOHILE Ministry of Defence ( R&D)SURI A. K. SURI (Alternate)
SURI HARISH SALOT Vijay Fire Protection Systems Pvt Lrd , BombaySHRI P. H. SETHNA Kooverji Devshi & Co Pvt Ltd, Bombay
SIiRI N. T. PANJWANI ( Alternate )SHR1 JITENDRA SI"IAII Safex Fire Service". BombaySHRI D. K. SIRKAR Synthetics & Chemicals Ltd, BareillySURf J. N. VAKIL Tariff Advisory Committee, Bombay
StiRI K. RAVl ( Alternate) -
11
BUREAU OF INDIAN STANDARDS
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