Bsi bs en 00367 1992 (1999)

BRITISH STANDARD BS EN 367 1992 Incorporating Amendment No 1 Protective clothing — Protection against heat and flames — Test Method Determination of the heat transmission on exposure to flame The Euro[.]

Incor por a ting

A mend ment No 1

The European Stand rd EN 3 7:19 2 has the status of a

British Stand rd

U C 6 4.8 5.5:6 7.1 4:6 4.8 3.6:6 0.1 3.9 :5 6.4

This British Stan ard,ha ing

b en pre ared u der the

directionof the Per onal

Safety Equipment Stan ards

Polcy Commit e , was publshed

u derthe authority of the

Stan ards Bo rd an comes

into efect on

1 Decemb r1 9

© BSI 0 -1 9

The folowing BSI references

relate to the work on this

stan ard:

Commite reference PSM/ 35

Draft for comment9 /42 8 DC

this European Stand rd was prep red, comprises the national stand rds

org anizations of the fol owing cou tries:

Austria Oester eichis hes Normu g sinstitut

Belg ium Institut belg e de normal sation

Finland S omen Stand rdisoimisl to, r.y

France Association f ançaise de normalsation

Germany Deuts hes Institut für Normu g e.V

Gre ce Helenic Org anization for Stand rdization

I eland Tech olog ical Institute of I eland

I eland National Stand rds Authority of I eland

Italy Ente Nazionale Ital ano di Unificazione

Luxembourg Inspection du Trav ai et des Mines

Netherlands Nederlands Normal satie- nstitu t

Portug al Instituto Portug uès d Qual d de

Sp in Asociación Esp ñola de Normalzación y Certificación

Sweden Stand rdisering skommis ionen i Sv erig e

Switz rland Association suis e de normalsation

UnitedKing dom British Stand rds Institution

Am endm ents is ued sinc publ cation

7 6 Ma 19 3 Indicated b a sidel ne in the marg in

Pag e

Annex A ( informativ e) Av aia i ity of materials 10

Annex B ( normativ e) Reference ta le of electromotiv e for e as a fu ction

oftemperature for ty pe T ( cop er/cop er-nickel constantan) thermocouples 1

Annex D ( i formativ e) Sig nificance ofthe heat trans er test 1

Ta le — Reference ta le of electromotiv e for e as a fu ction oftemperature

forty pe T ( cop er/ cop er-nickel constantan) thermocouples 1

National annex NA ( i formativ e) Commit e s responsible Inside b ck cov er

National annex NB ( i formativ e) Cros -reference Inside b ck cov er

Safety Equipment Stand rds Polcy Commit e and is the Eng lish lang uag e

v er ion of EN3 7:19 2 Pr ote tve clothing — Pr ote ton a ga inst hea t a nd

fir e—Method o d eter mining hea t tr a nsmis ion on ex osur e to fla me, publ shed

b the European Commit e for Stand rdization ( CEN)

EN3 7 was produced as a result ofinternational dis us ions in which the

UnitedKing dom to k an activ e p rt

A British Stand rd do s not purport to include al the neces ary prov isions of a

contract User of British Stand rds are responsible for their cor ect a pl cation

Com pl anc with a British Standard do s not of itselfc nfer im munity

f om leg al obl g ations

Summ ary of pag es

This document comprises a font cov er, an inside f ont cov er, p g es i andi,

theEN title p g e, p g es2 to14, an inside b ck cov er and a b ck cov er

This stand rd has be n up ated ( se cop rig ht d te) and ma hav e ha

NORME EUROPÉENNE

Octo er1 9

UDC6 4.8 5.5:6 7.1 4:6 4.8 3.6:6 0.1 3.9 :5 6.4

Des riptor : Per onal protectiv e uipment, protectiv e clothing , he t protection,he t resistant materials, fire resistant materials,

fi ng,thermal tests, he t transer, flames, he t transer co ficient

Eng lish ver ion

Vêtements de protection — Protection contre la

chaleur et les flammes — Méthode d’es ai:

Détermination de la transmis ion de chaleur à

l’ex osition d’une flamme

Schutzkleidung — Schutz g eg en Hitze und

Flammen — Prüfverahren: Bestimmung des

W ärmedur hg ang s b i Flammenwirkung

This European Stand rd was a prov ed b CEN on19 2-10-01 CEN member

are bou d to comply with the CEN/ CENELEC Internal Reg ulations which

stipulate the conditions for g iv ing this European Stand rd the status of a

national stand rd without any alteration

Up-to-d te lsts and bibl og ra hical references concerning such national

stand rds ma be obtained on a plcation to the Central Sec etariat or to any

CEN member

This European Stand rd exists in thre oficial v er ions ( Eng lish, French,

German) A v er ion in any other lang uag e ma e b translation u der the

responsibi ity of a CEN member into its own lang uag e and notified to the

Central Sec etariat has the same status as the oficial v er ions

CEN member are the national stand rds bodies of Austria, Belg ium,

Denmark, Finland, France, Germany , Gre ce, I eland, I eland, Italy ,

Luxembourg , Netherlands, Norway , Portug al, Sp in,Sweden, Switz rland and

UnitedKing dom

European Commit e for Stand rdization

Comité Europé n de Normalsation

Europ is hes Komite für Normu g

Central Se retariat: rue de Stas art 3 , B- 10 0 Brus els

©19 2 Copy rig ht reserv ed to CEN member

Ref No EN3 7:19 2 E

For word

This European Stand rd was prep red b

CEN/TC162 “ Pr ote tve clothing includ ing ha nd

a nd a r m pr ote ton a nd lifeja ckets” of which the

sec etariat is held b DIN

This European Stand rd shal be g iv en the status of

a national stand rd, either b publ cation of an

identical text or b endor ement, at the latest b

Apri 19 3, and confl cting national stand rds shal

be withdrawn at the latest b Apri 19 3

The stand rd was a rov ed and in ac ord nce with

the CEN/CENELEC Internal Reg ulations, the

fol owing cou tries are bou d to implement this

European Stand rd:

Austria, Belg ium, Denmark, Finland, France,

Germany , Gre ce, I eland, I eland, Italy ,

Luxembourg , Netherlands, Norway , Portug al,

Sp in, Sweden, Switz rland and UnitedKing dom

0 Introduction

This method has be n dev eloped fom an ASTM

method which was b sed on the Du Pont thermal

protectiv e index ( TPI) method It has be n

considera ly modified f om prev ious v er ions

folowing extensiv e interla oratory trials car ied

out b ISO/TC9 / SC13/WG2

The heat transmis ion throug h clothing is larg ely

determined b its thick es including any air g aps

tra ped betwe n the diferent lay er The air g aps

can v ary considera ly in diferent areas of the same

clothing as embly The present method prov ides a

g ra ing of materials when tested under stand rd

test conditions

The folowing major modifications hav e be n ma e

f om prev ious v er ions of this test method

a) The air g ap betwe n the b ck of the test

specimen and the calorimeter has be n

elminated This was fou d to inc ease al the

v alues recorded and to distort the results with

some materials more than other

b) The specimen siz has be n inc eased and the

mas of the location plate has be n specified The

mas of the location plate is used to hold the

specimen in position so that the specimen is

compres ed b a stand rd mas and is also

restricted fom shrin ing

c) The method of measuring the heat

transmis ion has be n drastical y simpl fied and

a new term heat trans er index ( HTI) has be n

introduced to av oid confusion with the thermal

protectiv e index ( TPI) or other terms used in

prev ious v er ions of this test This chang e makes

it easier to perorm the test and reduces the

pos ibi ity of mathematical er or in calculating

the results The heat trans er index prov ides a

method of g ra ing materials which do s not

imply that the material tested wi g iv e any

precise protection time u der actual use

conditions

d) Other methods of restraining the test

specimens using clamps or pins hav e be n

rejected on the b sis of interla oratory trials

because ofpractical dificulties which were

bel ev ed to inc ease the interla oratory

v aria i ty

e) All terminolog y which imples that the test

method measures the protection time prov ided b

the test material has be n elminated The

protection prov ided u der actual use conditions

wi l v ary considera ly , depending on the sev erity

of the actual flame sour e and the thick es of the

clothing , including intermediate air g aps, in the

ex osed area

1 Scope

This European Stand rd specifies a method for

comp ring the heat transmis ion throug h materials

or material as embles used in protectiv e clothing

Materials are ran ed b calculation of a heat

trans er index, which is an indication of the relativ e

protection u der the specified test conditions The

heat trans er index should not be taken as a

measure of the protection time g iv en b the tested

materials u der actual use conditions

2 Norm ative r f r nces

This European Stand rd incorporates b d ted or

u d ted reference, prov isions f om other

publcations These normativ e references are cited

at the a propriate places in the text and the

publcations are l sted hereafter For d ted

references, subsequent amendments to or rev isions

of any of these publcations a ply to this European

Stand rd only when incorporated in it b

amendment or rev ision For u d ted references the

latest edition of the publcation refer ed to a ples

ISO 13 , Textil es — Sta nd a r d a tmospher e fr

cond itoning a nd te tng

IEC 5 4-1, Ther mocouples — Pa r t 1: R efer enc

ta bles

3 Definitions

For the purposes of this stand rd the folowing

definitions a ply

3.1

test spe im en

al the lay er of fa ric or other materials ar ang ed in

the order and orientation as used in practice and

including u derg arments

3.2

incident heat flux density

the amount of energ y incident per u it time on the

ex osed face of the specimen, ex res ed in kW / m

2

3.3

heat trans er index (flame)

a whole n mber calculated fom the mean

timeinseconds to achiev e a temperature rise

of( 24,0±0,2)°C when testing b this method using

a cop er dis of mas ( 18,0 ±0,0 ) g and a starting

temperature of ( 25±5)°C

4 Principle

A horiz ntaly oriented test specimen is p rtial y

restrained fom mov ing and subjected to an incident

heat flux of8 kW / m

2

fom the flame of a g as burner

placed beneath it The heat p s ing through the

specimen is measured b means of a smal cop er

calorimeter on top of and in contact with the

specimen

The time to record a temperature rise

of( 24,0±0,2)°C in the calorimeter is recorded in

seconds The mean result for thre test specimens is

calculated as the “ heat trans er index ( flame)”

5 Apparatus

The a p ratus consists of:

— a g as burner;

— a cop er dis calorimeter;

— a specimen sup ort fame;

— a calorimeter location plate;

— a sup ort stand;

— suita le measuring equipment;

— a template

5.1 Ga s bur ner A flat top ed Meker burner with a

per orated top area of ( 38 ± 2)mm diameter and a

jet suita le for prop ne g as shal be used

Commer ial g ra e prop ne shal be used with the

flow being control ed b a fine control v alv e and

flowmeter

5.2 Cop er d is ca lor imeter The calorimeter

consists of a dis ofcop er of at least9 % purity ,

hav ing a diameter of4 mm and thick es 1,6mm,

and a weig ht of18g The dis should be ac urately

weig hed before as embly

A cop er-constantan thermocouple, with an output

in mi lv olts comply ing with IEC 5 4-1, is mou ted

on the cop er dis as shown in Fig ure 1 The

constantan wire should be at ached to the centre of

the dis and the cop er wire should be at ached as

near the cir umference as pos ible but so as not to

inter ere with mou ting the dis in the block The

diameter of both wires should be0,26mm or les

and only the leng th at ached to the dis should be

b red

The calorimeter is located in a mou ting block

which shal consist of a8 mm diameter cir ular

piece of asbestos-f e non combustible, heat

insulating board of nominal thick es 13mm The

thermal characteristic should comply with the

fol owing specification:

A cir ular cav ity is machined in the centre of the

block to ac ommod te the dis and an air g ap, as

shown in Fig ure 2 The dis is bonded in position

arou d its cir umference with an a hesiv e ca a le

of withstanding temperatures of a out20 °C The

face of the cop er dis shal be flush with the sur ace

of the mou ting block.It shal also be coated with a

thin lay er of an opticaly black p int hav ing a

co ficient of a sorption, a, g reater than0,9

( se Annex A )

5.3 Spe imen sup or t fr a me The specimen sup ort

f ame consists of a piece of cop er15 mm square

and1,6mm thick with a5 mm square hole in its

centre ( se Fig ure 3)

5.4 Ca l or imeter loca tion pla te The calorimeter

location plate is ma e fom a piece of

aluminium14 mm square and6mm thick A

cir ular hole9 mm in diameter shal be central y

in this block ( se Fig ure 4) The plate shal

weig h( 26 ± 13)g

5.5 Sup or t sta nd A sup ort stand is used to locate

the specimen sup ort fame relativ e to the burner

The top face of the specimen sup ort f ame should

be5 mm a ov e and p ralel with the top face of the

burner with the a is of the burner alg ned with the

centre of the opening in the sup ort f ame

( se Fig ure 5)

— density :

( 75 ± 5 )kg/ m

3

— thermal conductiv ity : 0,18W / ( m·k) ± 10%

Fig ure 1 — Calorimeter

Fig ure 2 — Calorim eter m ounting block

Fig ure 3 — Spe imen support f am e

Fig ure 4 — Calorim eter lo ation plate

Fig ure 5 — Support stand

It is conv enient to hav e a sh t er betwe n the

burner and the specimen sup ort f ame The

shut er should open completely in les than0,2 s

and should be operated immediately after placing

the burner in position It is useful if the positioning

of the burner, or the opening ofthe sh t er, if fit ed,

can be used to record the start of the ex osure

automatical y

5.6 R ecor d er To ena le the a solute temperature of

the cop er dis to be determined, the thermocouple

should be con ected to either an ice ju ction or a

commer ial reference ju ction The v oltag e sig nal

fom the thermocouple should be con ected to either

a suita le potentiometric chart recorder or

prog ramma le d ta recorder The recorder should

ena le v oltag es to be rea to104 V and times

to0,2s

5.7 Templa te A flat rig id template

measuring14 mm ×14 mm

6 Precautions

a) Perorm the test in a ho d or v entiated area to

car y awa the fumes It ma be neces ary to turn

of the exhaust or to shield the a p ratus during

the test so as not to disturb the flame

b) The equipment becomes hot during testing and

some test materials ma melt or drip Use

protectiv e g lov es when handl ng hot objects

c) Ke p combustible materials awa f om the

burner Ensure that the solv ent used for cleaning

the calorimeter is kept awa f om hot sur aces

and naked flames

7 Sam pl ng

7.1 Spe im en dimensions

The specimens shal ha e the

dimensions14 mm× 14 mm and shal be taken

f om points more than5 mm f om the edg e of the

pieces of the material, in an area f e f om defects

Composite specimens shal reproduce the

ar ang ement in which the lay er are used in

practice

The specimen shal be marked out using the

template ( se 5.7)

7.2 Num ber of spe im ens

A minimum of thre specimens shal be tested for

each material or as embly of materials

8 Conditioning and testing

atm ospheres

8.1 Conditioning atmosphere

Prior to testing , the specimens shal be conditioned

for at least24h at a temperature of ( 20 ± 2)°C and

a relativ e h midity of ( 65 ± 2)% ( se ISO 13 ) I

testing is not car ied out immediately after

conditioning , place the conditioned test specimens

in a sealed container Beg in testing of each

specimen within3min of remov ing it f om the

conditioning atmosphere or sealed container

8.2 Testing atm osphere

Per orm the tests in an atmosphere hav ing a

temperature of10°C to3 °C and a relativ e

h midity of15% to8 % and which is f e f om

draug hts

9 Test procedure

9.1 Preparation and cal bration

9.1.1 Prel iminar measure

Position the sup ort f ame on the sup ort stand so

that the top sur ace on which the specimen is placed

is5 mm a ov e the top face of the burner It is

sug g ested that a g uide and stops be used to ena le

the burner to be positioned quickly with its a is in

lne with the centre of the specimen

Place the burner to one side,activ ate and ig nite the

g as sup ly , and al ow sev eral min tes for flame

sta i ization

Con ect the thermocouple to the cold ju ction, and

con ect the output v oltag e into the recording dev ice

Before ev ery incident heat flux density reg ulation or

specimen ev aluation, the cop er dis temperature

should be in relativ ely stea y state and

within±2°C of ambient temperature Co lng ma

be ac elerated b the use of any dry , chi ed heat

sin , or b for ed air draft Alternativ ely , a n mber

of calorimeter u its ma be rotated Heating ma be

achiev ed b contact of the p lm of the hand with the

cop er dis or b short ex osure to the burner flame

N T On no ac ou t should the calorimeter mou ting block b

alowed to come into contact with water If this oc ur

ac identaly it should b dried out thoroughly b fore further use