IS 11239-13: Methods of Test for Rigid Cellular Thermal Insulation Materials, Part 13: Determination of Flammability by Oxygen Index

20 Pages·1992·2 MB·English

by  Bureau of Indian Standards

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IS 11239-13 (1992): Methods of Test for Rigid Cellular
Thermal Insulation Materials, Part 13: Determination of
Flammability by Oxygen Index [CHD 27: Thermal Insulation]
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IS 11239 ( Part 14) : 1992

Indian Standard
METHODS -OF TEST FOR RIGID CELLULAR
THERMAL INSULATION MATERIALS
PART 14 DETERMINATION OF FLAMMABILITY BY OXYGEN INDEX
UDC 662’998 - 405’8 : 536’468
0 BIS 1992
BUREAU OF 1NDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

February 1992 Price Group 6
lamrehT noitalusnI slairetaM lanoitceS ,eettimmoC CHD 027
DROWEROF
sihT naidnI dradnatS was adopted yb the uaeruB of naidnI ,sdradnatS after the draft dezilanif yb
the lamrehT noitalusnI slairetaM lanoitceS eettimmoC had neeb devorppa yb the lacimehC noisiviD
.licnuoC
sihT test dohtem si desu for gnitset slairetam that are gnitroppus-fles ni the mrof of lacitrev srab
or sheet pu ot 10’5 mm .kciht sihT dohtem si elbatius for ,dilos detanimal or ralullec slairetam
deziretcarahc yb na tnerappa ytisned greater naht 100 .3m/gk sihT dohtem yam osla eb elbacilppa
ot emos ralullec slairetam gnivah na tnerappa ytisned of ssel naht 100 .’m/gk A dohtem has osla
neeb dedivorp for gnitset elbixelf sheet or mlif slairetam elihw gnieb detroppus .yllacitrev
negyxO xedni stluser deniatbo gnisu the sdohtem debircsed ni siht dradnats nac edivorp a evitisnes
erusaem of the gninrub scitsiretcarahc of slairetam rednu niatrec dellortnoc yrotarobal snoitidnoc
dna ecneh yam eb lufesu for ytilauq lortnoc .sesoprup ehT stluser deniatbo are tnedneped nopu the
shape, noitatneiro dna noitalosi of the test nemiceps dna the snoitidnoc of .noitingi roF ralucitrap
slairetam or ,snoitacilppa ti yam eb yrassecen or etairporppa ot yficeps tnereffid noitingi serudecorp
hcihw yam ton eb elbarapmoc dna on noitalerroc htiw ytilibammalf ruoivaheb rednu other erif
snoitidnoc si .deilpmi
stluseR deniatbo ni ecnadrocca htiw siht dradnats tsum ton eb desu ot ebircsed or esiarppa the erif
hazard detneserp yb a ralucitrap lairetam or shape rednu lautca erif ,snoitidnoc sselnu desu as eno
tnemele of a erif ksir tnemssessa that takes otni tnuocca lla of the factors tnenitrep ot the -ssessa
tnem of the erif haz.ard of a ralucitrap noitacilppa for the .lairetam
roF esoprup-eht of gnidiced whether a ralucitrap tnemeriuqer of siht dradnats si deilpmoc ,htiw the
lanif ,eulav devresbo or ,detaluclac gnisserpxe the tluser of a test or ,sisylana llahs eb dednuor off ni
ecnadrocca htiw SI 2 : 1960 seluR‘ for gnidnuor off laciremun seulav .‘)desiver( ehT rebmun of
tnacifingis secalp deniater ni the dednuor off eulav dluohs eb the emas as that of the deificeps eulav
ni siht .dradnats
.SI 11239 (Part 14) : 1992
Indian Standard
METHODSOFTESTFORRIGIDCELLULAR
THERMALINSULATIONMATERIALS
PART 14 DETERMINATION OF FLAMMABILITY BY OXYGEN INDEX
1 EPOCS at hcihw the gninrub ruoivaheb of 50 tnecrep of -iceps
snem gnitneserper the lairetam rednu test dluow -xe
sihT dradnats seificeps sdohtem for gninimreted the ceed at tsael eno of the deificeps stimil for .gninrub
muminim noitartnecnoc ,negyxo-fo ni erutximda htiw
,negortin that lliw llamsfonoitsubmoctroppus lacitrev 5 SUTARAPPA
test snemiceps rednu deificeps test .snoitidnoc ehT
stluser are denifed as negyxo xednI .seulav ehT gniwollof sutarappa llahs eb degnarra as detacidni
yb the smargaid ni .giF 1 dna 2.
NOTES
1 tI may ton eb elbissop ot ylppa eseht sdohtem ylirotcafsitas 5.1 tseT yenmihC
ot slairetam taht tibihxe hgih slevel egaknirhsfo nehw ,detaeh rof
,elpmaxe ylhgih detneiro niht .mlif
A tnatsiser-taeh ssalg ebut detroppus yllacitrev no a
2 roF gnissessa eht emalf noitagaporp seitreporp fo ralullec esab hguorht hcihw gniniatnoc-negyxo gas serutxim
slairetam fo ytisned ssel naht 001 ,’m/gk noitnetta si nward ot
nac eb .decudortni
IS 93211 traP( )21 : .9891
5.1.1 ehT preferred snoisnemid ofthe yenmihc are 450
2 SECNEREFER
mm muminim thgieh dna 75 mm muminim retemaid
lacirdnilyc( .)erob ehT reppu teltuo llahs eb detcirtser
ehT naidnI sdradnatS detsil woleb are yrassecen -da
stcnuj ot siht dradnats : as yrassecen yb na daehrevo cap gnivah na teltuo
llams hguone ot ecudorp na tsuahxe yticolev of at tsael
90 s/mm morf- a wolf rate nihtiw the yenmihc of
IS No. Title
30 s/mm (see Note). syenmihC of other ,snoisnemid
3069: 1991 yrassolG of ,smret slobmys dna htiw or tuohtiw detcirtser ,steltuo yam eb ,desu fi
stinu otgnitaler lamreht noitalusni nwohs ot evig tnelaviuqe .stluser
slairetam
4905 : 1968 Methods for modnar gnilpmas 5.1.2 The mottob of the ,yenmihc or the esab nopu
dnoces( revision ) hcihw the yenmihc si ,detroppus llahs etaroprocni a
11239 (Part 12) : Methods of test for digir ralullec snaem for gnitubirtsid ylneve the gas erutxim gniretne
1989 lamreht noitalusni slairetam : the .yenmihc ehT preferred snaem sesirpmoc dilos
Part 12 latnoziroH gninrub ssalg sdaeb of neewteb 3 dna 5 ,retemaidmm ni a reyal
scitsiretcarahc neewteb 80 dna 100 mm deep. Other ,snaem hcus as
laidar ,sdlofinam yam ,desueb fi nwohs ot evig -aviuqe
3 YGOLONIMRET tnel .stluser A suorop neercs yam eb detnuom woleb the
level of the nemiceps ,redloh ot tneverp gnillaf -moc
roF the sesoprup of siht ,dradnats snoitinifed nevig ni noitsub sirbed morf gniluof the gas yrtne dna -ubirtsid
IS 3069 : 1991 ni noitidda ot the gniwollof llahs .ylppa noit paths.
3.1 negyxO xednI 5.1.3 The yenmihc troppus yam etaroprocni a -vel
gnille ecived dna ,rotacidni ot etatilicaf lacitrev -ngila
ehT muminim noitartnecnoc of negyxo yb egatnecrep tnem of the yenmihc dna a test nemiceps detroppus
emulov ni a erutxim negyxofo dna negortin decudortni .niereht A dark dnuorgkcab yam eb dedivorp ot -ilicaf
at 23 + 2OC that lliw tsuj troppus noitsubmoc of a tate noitavresbo of semalf nihtiw the .yenmihc
lairetam rednu deificeps test .snoitidnoc
ETON - roF sebut fo 57 ot 001 mm ,retemaid a pac gnigrevnoc
ot na teltuo fo 04 mm retemaid ta a level ta tsael 01 mm evoba eht
4 ELPICNIRP pot fo eht lacirdnilyc yenmihc sah neeb dnuof .yrotcafsitas
A llams test nemiceps si detroppus yllacitrev ni a 5.2 tseT nemicepS redloH
erutxim of negyxo dna negortin gniwolf sdrawpu
hguorht a tnerapsnart .yenmihc e%T reppu dne of the elbatiuS for gnitroppus a nemiceps yllacitrev ni the
sinemiceps detingi dna the tneuqesbus -ivahebgninrub ertnec of the .yenmihc
ruo of the nemiceps si devresbo ot erapmoc the doirep
hcihw~rof gninrub ,seunitnoc or the htgnel of nemiceps 5.2.1 roF gnitroppus/fles ,slairetam the nemiceps llahs
,tnrub deificepshtiw stimil for hcus .gninrub gnitset-yB eb dleh yb a llams pmalc hcihw si at tsael 15 mm yawa
a seires of snemiceps ni tnereffid negyxo -artnecnoc morf the tseraen tniop at hcihw the nemiceps yam nrub
,snoit the muminim negyxo noitartnecnoc si detamitse erofeb the gninrub-fo-tnetxe noiretirc si exceeded. roF

1
IS 11239 (Part14):1992
GLASS CHIMNEY
y (FOR DIMENSIOEtS REFER 704.(.1)
C~ilhttlEY CAP
(OPEIIItIG 0 40 mm)
4~ltRtlATiVE GAS FLOW
MEASURING DEVICES SUITABLE DEVICE
(SEL NOTE TC'4.iP) FOR RESTRICTIFIG
(;HIMNEY OIJTLET
(Sq.41)
-61
.1 Burning Test Specimen .9 ffo-tuC evlaV
2. Specimen redloH .01 ecifirO ni redloH
3. retingI .11 erusserP eguaG
4. sirbeD neercS fo eriW hseM .21 noisicerP erusserP rotalugeR
5. yenmihC troppuS .31 retliF
6. daeB deB .41 eldeeN evlaV
7. esaB etalP .51 saG woIF reteM
8. saG gniximerP tnioP .61 erutarepmeT rosneS
.GIF 1 DIAGRAMO F A ‘T~YL’KAt~L~ ~~~u~~F~OwRs D ETEKMINATIO~FN O XYGENI NDEX

2
KS 11239( Part 14) : 1992
LOWER
PCItfHEfCR AiARK
--l
Two emarf snoitces tsum dloh eht tset nemiceps yleruces gnola htob thgirpu segde neewteb skrof hcae edam fo sselniats .leets
All snoisnemid ni sertemillim htiw secnarelot 2 520 .mm
FIG.2 FRAMED FSIGNF ORS WWRTINGN ON-SELFS UPPORTINTGE ST SPECIMENS

3
IS 11239 (Part 14) : 1992
detroppus mlif or sheet test ,snemiceps the nemiceps 5.5 Flame Igniter
llahs eb detroppus yb~ htob lacitrev edges ni a emarf
agnisirpmoC yenmihcehtotnidetresniebnactahtebut
tnelaviuqe ot that detartsulli yb erugiF 2, htiw -refer
ot ylppa ot the test nemiceps a emalf gniussi morf na
ecne skram at 20 mm dna 100 mm woleb the top of the
teltuo of 2 + 1 mm retemaid at the dne of the .ebut
.emarf
5.2.2 ehT eliforp of the redloh dna sti troppus dluohs 5.5.1 ehT emalf leuf llahs eb ,enaporp tuohtiw -erp
eb htooms ot eziminim noitcudni of ecnelubrut eht’ni dexim .ria ehT leuf ylppus llahs eb detsujda so that the
gnisir wolf of gas. emalf lliw tcejorp 16 ? 4 mm yllacitrev sdrawnwod
morf the teltuo nehw the ebut si lacitrev nihtiw the
5.3 Gas Supplies , yenmihc dna the emalf si gninrub nihtiw the yenmihc
.erehpsomta
gnisirpmoC dezirusserp secruos of negyxo ro/dna
negortin ton ssel naht 98 tnecrep (m lm ), erup ro/dna 5.6 gnimiT Device
naelc ria gniniatnoc( 20.9 tnecrep ,)negyxo as -orppa
.etairp elbapaC of gnirusaem sdoirep pu ot 5 nim htiw na
ycarucca ?fo 0.2 s.
5.3.1 ehT erutsiom tnetnoc of the gas erutxim gniretne
the yenmihc llahs eb ssel naht 1~.0 tnecrep ( m/m ),
sselnu the stluser evah neeb nwohs ot eb evitisnesni ot 5.7 Fume Extraction System
rehgih erutsiom slevel ni the gas .erutxim ehT gas
gnidivorP tneiciffus noitalitnev or tsuahxe ot evomer
ylppus metsys llahs etaroprocni a gniyrd ,ecived or
semuf or soot dellepxe morf the yenmihc tuohtiw
rofylppussagehtgnilpmasrognirotinomrofnoisivorp
gnitpursid the wolf-sag rate or serutarepmet ni the
erutsiom ,tnetnoc sselnu the erutsiom tnetnoc of the gas
.yenmihc
seilppus si nwonk ot eb .elbatpecca
5.3.2 ehT tneutitsnoc gas ylppus senil llahs eb deknil NOTE - If soot-generating materials era gnieb ,detset eht ssalg
yenmihc yam eriuqer gninaelc ot niatniam doog ,ytilibisiv dna
ni a rennam hcihw ylhguoroht sexim the gases, erofeb eht sag ,stelni ro telni ,neercs dna erutarepmet sensor fi( )dettif
yeht retne the gas noitubirtsid ecived at the esab of the yam osla eriuqer gninaelc ot noitcnuf .ylreporp elbatiuS
,yenmihc so that the noitartnecnocnegyxoninoitairav snoituacerp dluohs eb nekat ot tcetorp lennosrep morf suoixon
slairetam ro snrub gnirud gnitset ro gninaelc .snoitarepo
levelehtwoleb,yenmihcehtnignisirerutximsagehtni
of iht test si,nemiceps ssel naht 0.2 tnecrep (V/V ).
6 CALIBRATION OF EQUIPMENT
NOTE - It should not be assumed that bottled oxygen or
nitrogen will always contain less than 0.1 percent (m/m) of 6.1 roF ecnailpmoc htiw siht ,dohtem etarbilac the
water; moisture contents of 0.003 percent to 0.01 percent (m/m)
yllacidoireptnempiuqe ecnadroccani htiw the -curtsni
are typical for commercia: supplies as filled bottles more than 98
percent (m/m) pure, but as such bottled gases are depressured to snoit nevig ni xennA A so that the mumixam lavretni
below about 1 ~MPa, the moisture content of the gas drawn off neewteb noitarbilacer dna esu seilpmoc htiw the -irep
may rise above 0.1 percent (m/m ). ods stated ni elbaT 1.
5.4 Gas Measurement and Control Devices
Table 1 Calibration of Equipment
elbatiuS for ehtgnihsilbatse noitartnecnoc of ninegyxo
the gas erutxim gniretne the yenmihc htiw na ycarucca Sl No. Item Maximum Period
of 20.5 tnecrep (V/v) of the erutxim dna for gnitsujda
the noitartnecnoc htiw a noisicerp of 20.1 tnecrep (1) (2) ’ (3)
(V/V) of the erutxim nehw the gas yticolev hguorht the i) Gas-flow etar slortnoc 6 shtnom
yenmihc si 40 ? 10 s/mm at 23 + 2OC.
ii) negyxO noitartnecnoc slortnoc 6 months
5.4.1 snaeM llahs eb dedivorp for gnikcehc or -rusne
iii) Gas system joints (as required
gni that the erutarepmet of the gas erutxim gniretne the
by A-2)
yenmihc si 23 c 2OC. fI siht sevlovni na lanretni ,eborp
)a rof stnioj debrutsid gnirud 42 h
sti noitisop dna eliforp llahs eb dengised ot eziminim
esu ro gninaelc fo eht sutarappa
noitcudni of ecnelubrut nihtiw the .yenmihc
)b rof debrutsidnu stnioj 6 months
NOTE - Systems of measurement and control that have proved
:
satisfactory include the following
7 PREPARATION OF TEST-SPECIMENS
Needle valves on individual and mixed gas supply lines, a
paramagnetic oxygen analyser that~continuously samples 7.1 Sampling
the mixed gas, and a flowmeter to indicate when the gas
flow through the chimney is within the required limits; aniatbO elpmas tneiciffus tafonoitaraperprof tsael 15
test .snemiceps ehT elpmas llahs eb ,nekat fi ,tnaveler
Calibrated orifices, gas pressure regulators and pressure
gauges on the individual gas supply lines; and ni ecnadrocca htiw the lairetam ,noitacificeps -rehto
esiw ni ecnadrocca htiw SI 4905 : 1948.
Needle valves and calibrated flowmeters on the individual
gas supply lines.
NOTE -For a material for which the oxygen index is known to
smetsyS (b) and (c) may require calibration after assembly to within + 2,15 test specimens may be sufficient. For materials of
ensure that the compounded errors of the component parts do not unknown oxygen index,,r which exhibit erratic burning charac-
exceed the requirements of 5.4. teristics, between 15 and 30 test specimens may be required.
4
1s 11239 (Part 14) : WY2
7.2 Test Specimen Dimensions and Their 7.3.2 Marks for Testing by Propagating Ignition
Preparation
ehT ecnerefer skram for gnitset snemiceps of mroF V
,gnisU fi ,elbacilppa serudecorp that ylpmoc htiw the are deirrac yb the gnitroppus emarf (see .giF 2), tub-
etairporppa lairetam noitacificeps or naidnI dradnatS hcus snemiceps yam eb dekram at 20 mm dna at 100
sdohtem for nemiceps ,noitaraperp dluom or tuc test mm morf the dne ot eb ,detingi for nehwecneinevnoc
snemiceps that yfsitas the snoisnemid deificeps for the gnitset elbats-taeh .slairetam
tsom etairporppa nemiceps mrof nevig ni elbaT 2.
7.3.2.1 fI snemiceps of smroF ,I ,II III dna VI are ot eb
7.2.1 erusnE that the secafrus of the snemiceps are tested ni ecnadrocca htiw dnal.2.8ees(BerudecorP
naelc dna free morf swalf that dluoc tceffa- gninrub 8.2.3), yeht llahs eb dekram at 10 mm dna at 60 mm
,ruoivaheb for elpmaxe larehpirep gnidluom hsalf or morf the dne ot eb .detingi
srrub morf .gninihcam
7.4 Conditioning
7.2.2 Note the noitisop dna noitatneiro of test -iceps
snem htiw respect ot yna yrtemmysa ni the elpmas sselnU esiwrehto deificeps ni other dehsilbatse -nats
.lairetam dards, each test nemiceps llahs eb denoitidnoc for at
tsael 88 h at 27 2 2OC dna (65 2 5) tnecrep RH
NOTES yletaidemmi roirp ot .esu
1 Some material specifications may require choice and identi-
fication of the “state of the test specimen” used; for example, in NOTE -Samples of cellular materials that may contain volatile
a “defined state” or a “basic state” for a styrene-based polymer flammable material should be purged of such volatile material
or copolymer. prior to conditioning at 23oC and 50 percent RH. Test specimens
may be purged satisfactorily by pre-conditioning in suitable
2 Oxygen index results may be significantly affected by differ-
ventilated ovens for 168 h. Larger blocks of such materials may
ences in ease of ignition or of burning behaviour, due to material
require longer pre-treatment. Facilities for cutting specimens
inhomogeneity (for example, different levels of shrinkage when
from cellular materials that may contain volatile flammable
heated for specimens cut in differenl directions from asymmetri-
material must be suitable for the hazards involved.
cally-oriented thermoplastic film).
7.3 Marking of Test Specimens 8 PROCEDURE
roF gnirotinom the ecnatsid revo hcihw a nemiceps 8.1 Setting Up the Apparatus and Test Specimen
,snrub ti yam eb dekram htiw esrevsnart senil at eno or
erom slevel hcihw are tnedneped nopu the nemiceps 8.1.1 niatniaM the tneibma erutarepmet for the test
mrof dna the noitingi erudecorp ot eb .desu -fleS sutarappa at 27 + 2OC. fI ,yrassecen keep the test
gnitroppus snemiceps are ylbareferp dekram no at tsael snemiceps ni na erusolcne at 27 + 2OC dna 65 % 5
two tnecajda faces. fI wet skiri are ,desu the skram llahs tnecrep RH morf hcihw each test nemiceps yam eb
eb yrd erofeb the nemiceps si .detingi nekat nehw .deriuqer
8.1.2 etarbilaceR tnempiuqe ,stnenopmoc fi -secen
7.3.1 Marks for Testing by Top Surface -Ignition
yras (see 5 dna xennA .)A
tseT snemiceps of smroF ,I ,II III or ,VI ot eb tested ni 8.1.3 tceleS na laitini noitartnecnoc of negyxo ot eb
ecnadrocca htiw erudecorp A (see 8.2.1), llahs eb .desu nehW ,elbissop siht yam eb desab no ecneirepxe
dekram 50 mm morf the dne ot eb .detingi of stluser for ralimis .slairetam ,ylevitanretlA yrt ot
Table 2 Test Specimen Dimensiow
(Clause 7.2)
SI No. Test Specbnen Diinlensious Typical Use
A
Form’ r Y
Length Width Thickness
mm mm mm mm
(1) (2) (3) (4) (5) (61
i) 1 80 to 150 10 r 0.5 4 ? 0.25 For moulding materials
ii) 11 80 to 150 10 + 0.5 10 + 0.5 For cellular materials
iii) Ill 2 80 to 150 10 + 0.5 < 10.5 For sheet materials “as received”
iv) IV 70 to 150 6.5 2 0.5 3 2 0.25 Alternative size for self-supporting
moulding or sheet materials-for
electrical purposes
0
v) VZ 140-5 52 + 0.5 < 10.5 For flexible film or sheet
1
Test specimens of Forms I, 11, Ill and IV are suitable for materials that are self-supporting as these dimensions.
Test specimens of Form V are suitable for materials that require support during testing.
*Results obtained during Form Ill or Form V test specimens may only be comparabIe for specimens of the same form and thickness. It is assumed
that the amount of variation in thickness for such materials will be controlled by other standards.

5