Bsi bs au 178a 1992 (1999)

8 Applcation for a prov al and procedure on any subseq uentAppend ix C Toug hened g las windows other than winds re ns 23 Appendix E Ordinary laminated g las wind ows other Appendix H Th

Specification for

g lass

This Bri sh Stan ard, ha ing

b en pre ared u der the

directonof the Automo ile

Stan ards Policy Commi e ,

waspublished u der the

authoriyof the Stan ards

Bo rdan comesinto efect on

2 Fe ruary 1 9

© BSI 0 -1 9

Fir t published No emb r 1 8

The folowing BSI references

relate to the work on this

stan ard:

Commi e reference AUE/10

Draft for comment9 /77 7 DC

ISBN 0 5 0 1 9 7 9

The prep ration of this British Stand rd was entrusted b the Automobi e

Stand rds Pol cy Commit e ( AUE/-) to Tech ical Commit e AUE/10, upon

which the fol owing bod ies were represented :

Association of British Glas Rep ir Operator

Automobi e Association

British Plastic Federation

British Raiway s Board

Dep rtment of Transport

Dep rtment of Transport ( Transport and Roa Resear h La oratory )

Flat Glas Man facturer ’ Association

Glas and Glazing Fed eration

National Carav an Cou ci Ltd

Society of Motor Man facturer ’ and Tra er Ltd

W inds re n an Glas Rep irer’s Association

W inds re n Rep ir Eq uipment Manufacturer ’ an S p ler ’ Association

Am endm ents is ued sinc publ cation

8 Applcation for a prov al and procedure on any subseq uent

Append ix C Toug hened g las windows other than winds re ns 23

Appendix E Ordinary laminated g las wind ows other

Appendix H Thick es es of g las av aia le to the

Append ix J Appl cation for a prov al and procedure on

Appendix K Clas ification of v ehicles ac ording to the

Commis ion of the European Commu ities ( EEC/Brus els) and

the United Nations Economic Commis ion for Europe

Fig ure 1 — Ma imum heig ht of seg ments, A — B, measured

Fig ure 2 — Specified points of imp ct for winds re ns 9

Fig ure 3 — Specified points of imp ct for toug hened g las

Fig ure 9 — Eq uipment for measuring s at ered lg ht ( haz meter) 15

Fig ure 10 — Dev iation at point M on the in er sur ace of the

Fig ure 14 — Ex mple of combustion chamber with

Pag e

Ta le 2 — Tests specified for the categ ories of

Ta le 3 — Rea ing s req uired for a rasion resistance test 15

Ta le 4 — The minimum number of prod ucts req uired

This British Stand ard has be n prep red u der the d irection of the Automobie

Stand rd s Polcy Commit e It super edes BS AU17 :19 0 which is withdrawn

This new ed ition of BS AU17 has be n produced to al g n the stand rd with ECE

( United Nations Economic Commis ion for Europe) Reg ulation4

This edition introduces tech ical chang es but it do s not reflect a ful rev iew or

rev ision of the stand rd, which wi l be u dertaken in d ue cour e

Diferences in the text betwe n this edition and BS AU17 :19 0 are ind icated b

a l ne in the marg in

A British Stand rd d oes not purport to includ e al the neces ary prov isions ofa

contract User of British Stand ard s are responsible for their cor ect a plcation

Compl anc with a British Standard does not ofitself confer imm unity

f om leg al o l g ations

Sum m ary of pag es

This d ocument comprises a f ont cov er, an insid e font cov er, p g esi toiv ,

p g es1 to3 , an inside b ck cov er an a b ck cov er

This stand ard has be n up ated ( se copy right d te) and ma hav e ha

amendments incorporated This wi l be indicated in the amendment ta le on

theinside f ont cov er

1 Scope

This British Stand rd specifies req uirements for

safety g las for instal ation either as winds re ns or

as other windows or as p rtitions in motor v ehicles

an trai er ( se 2.1 and 2.2) This stand rd also

specifies test req uirements

NOT The t les of the publicatons refered to in this stan ard

are listed on the inside b ck co er

2 Definitions

For the purposes of this British Stand rd the

fol owing d efinitions a ply

2.1 Motor vehicle

A mechanicaly propel ed v ehicle intend ed or

a a ted for use on roa s ( Roa Trafic Act 19 2)

2.1.1

m

1

vehicle

a v ehicle used for the car iag e of p s eng er and

comprising no more than8 seats in a d ition to the

driv er’s seat

NOT A list of E C an U -E E v hicle categ ories wih

defini ons is g iv n for informaton in App n ix K

slow m oving vehicle

an industrial or ag ricultural tractor ca a le of a

spe d not exce ding3 km/h on lev el g rou d

2.4

toug hened g las

a g las consisting of a sing le lay er that has be n

subjected to special treatment to inc ease its

mechanical streng th an to condition f ag mentation

after shat ering

2.5 Lam inated g las

A g las consisting of two or more lay er held

tog ether b one or more interlay er of plastic

material Laminated g las ma be either ordinary

( se 2.5.1) or treated ( se 2.5.2)

2.5.1

ordinary laminated g las

laminated g las in which none of the lay er of g las

of which it is composed has be n treated

2.5.2

treated lam inated g las

laminated glas in which at least one of the lay er of

g las of which it is composed has be n specialy

treated to inc ease the mechanical streng th an to

condition f ag mentation after shat ering

2.6 Group of windscre ns

W inds re ns of diferent siz s and sha es that can

be consid ered to hav e the same characteristic for

mechanical properties, fag mentation an

resistance to the env ironment tests

a characteristic that substantial y chang es the

optical and / or mechanical properties of a safety

g las with reg ard to its a plcation to a v ehicle The

trad e name or mark of the man facturer is also a

princip l characteristic ( se 3.2)

2.8

se ondary characteristic

a characteristic that sig nificantly but not

substantialy chang es the optical and /or mechanical

properties of a safety g las with reg ard to its

a plcation to a v ehicle ( se 3.3) The sig nificance of

the chang e is jud g ed in relation to the ind ices of

d ificulty ( se 2.9)

2.9

indic s of dificulty

a two-stag e g ra ing a ply ing to the v ariation in

practice of each second ry characteristic

Ta le 1 shows the characteristic to which the

ind ices relate; a chang e f om ind ex( 1) to index( 2)

req uires a d itional testing

2.10

develo ed area of a windscre n

the minimum rectang ular area of g las fom which

a winds re n can be dev eloped

2.1

incl nation ang le of a windscre n

the ang le included betwe n a v ertical lne and the

straig ht lne p s ing throug h the top and bot om

ed g es of the wind sc e n, these lnes being defined in

a v ertical plane containing the long itudinal a is of

the v ehicle

NOT 1 Me surement of the inclinaton ang le is b sed on a

v hicle stan ing n le el g rou d; the v hicle is in ru ning rder,

complete wih fuel,co lant, lubricant,to ls an sp re whe l (f

pro ided as stan ard e uipment b the v hicle man facturer)

inclu ing the mas of a driv er an , in the case of p s eng er car ,

of one font se t p s eng er ( taking 5 + 0,– 1kg p r p s eng er)

NOT 2 V ehicles e uip ed wih hydro neumatc, hydraulic or

pneumatc susp nsion or a de ice for automatc le eling

ac ording to lo d should b tested in the normal ru ning

con i on sp cified b the man facturer

2.12

heig ht of seg m ent

the ma imum dimension to the in er sur ace of the

g las f om a plane contacting the g las extremities,

measured a proximately normal to the g las

( se Fig ure 1)

2.13

m inim um radius of curv ture

the a proximate v alue of the smalest rad ius of

winds re n ar measured in the most curv ed area of

the winds re n

2.14

ty e of safety g las

safety g las , as defined in 2.4 and 2.5, not exhibiting

any es ential d iferences of a kin relating , in

p rticular, to the princip l an second ry

characteristic l sted in clause 3

2.15

se ondary imag e

a spurious or g host imag e, usualy se n at nig ht

when the object being v iewed is v ery brig ht in

relation to its sur ou ding s, e.g the head lig hts of an

a proaching v ehicle

2.16

sam ple

a safety g las product, selected as representativ e of

a production b tch, and submit ed for test

2.17

test pie e

an article,subjected to a test procedure, which ma

either be specialy prep red for the purpose or cut

fom a sample; in a propriate cases a complete

safety g las prod uct ma serv e as a test piece

2.18

da l g ht o ening

the clear and u obstructed a erture in the bod of a

v ehicle into which a safety g las is fit ed

2.19

se ondary im ag e separation

the ang ular distance betwe n the a p rent

positions of the primary imag e and of the second ry

ima eFig ure 1 — Ma im um heig ht of seg ments, A– B, measured approxim ately normal to the g las

3 Glazing cha racteristics

3.1 General

A safety g las product is defined b its princip l and

second ry characteristic ( Se 3.2 and3.3 for a

complete lst a ply ing to al safety g las products.)

Althoug h a chang e in princip l characteristic

imples a new ty pe of product, it is recog niz d that,

in certain cases, a chang e in sha e and d imension

do s not neces ariy require a complete set of tests

to be car ied out

For certain of the tests as pres ribed in the

a pendices, g las es ma be g rouped if it is ev id ent

that they hav e simi ar princip l characteristic

Specimens of g las exhibiting diferences only as

reg ards the second ry characteristic refer ed

toin3.3 ma be considered as of the same ty pe;

certain tests may , howev er, be car ied out on

samples of such g las , if such tests are ex lcitly

stipulated in the test cond itions

3.2 Principal characteristics

The princip l characteristic refer ed to in2.7 shal

be as folows:

a) the trad e name or mark of the man facturer;

b) the sha e and dimensions ( leng th, width,

height of seg ment an minimum rad ius of

curv ature) in the case of wind sc e ns, an the

categ ory of sha e ( flat or curv ed ) in the case of

toug hened wind ows other than winds re ns;

c) the number of lay er of g las ;

d ) the nominal thick es , e, in the case of

wind sc e ns, or categ ory of thick es in the case

of windows other than wind sc e ns;

e) the nominal thick es and the nature ( foi or

airg ap) and the ty pe of the interlay er( s),

e.g poly v iny l buty rate ( PVB) or other plastic

The second ry characteristic refer ed to in2.8

shal be as folows:

a) the nature of the g las ( plate, float or she t);

b) the colouring of the interlay er( s) ( colourles or

tinted);

c) the colouring of the g las ( colourles or tinted);

d ) the incorporation of electrical conductor ;

e) the incorporation of obs uration b nd s

4 General requir ments a nd

4.1 All g las , includ ing winds re n g las , shal be

such that, in the ev ent of shat ering , the d ang er of

per onal injury is reduced to a minimum

The g las shal be suficiently resistant to cond itions

to be ex ected in normal trafic, and to atmospheric

and heat cond itions, chemical action and a rasion

4.2 W ind sc e ns shal, in ad dition, be suficiently

transp rent, and not cause any noticea le

d istortions of objects se n throug h the winds re n

or cause any confusion betwe n the sig nal ing

colour normal y used In the ev ent of the

winds re n shat ering , the driv er shal sti l be a le

to se the road clearly so that he can brake an stop

his v ehicle safely

4.3 The thick es es of g las g eneraly av ai a le in

the United King dom for use in the automobie

industry are g iv en for information in Appendix H

4.4 Safety g las a pl cation

4.4.1 The winds re ns of slow mov ing v ehicles shal

be of z ne toug hened g las , u iformly toug hened

g las or hig h per ormance laminated g las

4.4.2 The winds re ns of M

1

an v ehicle categ ories

other than slow mov ing v ehicles shal be either of

z ne toug hened g las or hig h per ormance

laminated g las

4.4.3 The windows, other than wind sc e ns, of al

categ ories of v ehicle shal be of hig h per ormance or

stand ard laminated g las , or u iformly toug hened

g las

5 Pa rticular r quirements

5.1 General requirem ents

All ty pes of safety g las shal comply with the

g eneral req uirements des ribed in Appendix A

Depend ing on the categ ory to which they belong ,

they shal , in a dition, comply with the p rticular

requirements stated in5.2.1 to5.2.7

NOT Tests ne d only b p rormed if the test authoriy

re uires them, ha ing reg ard to the informaton alre dy in is

p s es ion on the prod ct an the materials used

5.2 Particular requirem ents

5.2.1 For toug hened g las winds re ns, the

req uirements are specified in Appendix B

5.2.2 For u iformly toug hened g las winds re ns in

slow mov ing v ehicles, the req uirements are

specified in Append ix C, the hea form test is

specified in B.6 an the optical req uirements are

specified in A.8

5.2.3 For toug hened g las wind ows other than

winds re ns, the req uirements are specified in

Appendix C

5.2.4 For ordinary laminated g las winds re ns, the

requirements are specified in Appendix D

5.2.5 For ordinary laminated g las wind ows other

than wind sc e ns, the req uirements are specified in

Append ix E

5.2.6 For treated laminated g las winds re ns, the

requirements are specified in Appendix F

5.2.7 For plastic -coated laminated g las

wind sc e ns, the requirements are specified in

Appendix L

6 Purpose ofthe tests

6.1 The fol owing tests are specified in this British

Stand ard

6.1.1 Fragmentation

The purpose of this test is to:

a) v erify that the f ag ments and splnter

prod uced after f acture are such as to minimiz

the risk of injury ; and

b) v erify the transp rency of winds re ns after

shat ering

6.1.2 Me hanical strengt h

6.1.2.1 B a ll impa ct te t

There are two forms of test, one using a2 7g b l

and one using a2.26kg b l, as stated in 6.1.2.1.1

an 6.1.2.1.2

6.1.2.1.1 2 7g ba ll te t

The purpose of this test is to as es the a hesion of

the interlay er in laminated g las , an the

mechanical streng th of toug hened g las other than

winds re ns

6.1.2.1.2 2.26kg ba ll te t

The purpose of this test is to as es the penetration

resistance of laminated g las

6.1.2.2 Hea d fr m te t

The purpose of this test is to v erify complance with

requirements relating to the l mitation of injury in

the ev ent of imp ct ag ainst laminated g las other

than winds re ns, or the winds re n or d ouble

windows, and d ouble-g laz d u its for use in sid e

windows of buses or coaches

6.1.3 Re istanc t o the envir nment

6.1.3.1 A br a sion te t

The purpose of this test is to determine that the

resistance to a rasion of a safety g las exce ds a

specified v alue

6.1.3.2 High temper a tur e te t

The purpose of this test is to v erify that, when

ex osed to hig h temperature ov er an extend ed

period of time, no bub les or other d efects oc ur in

laminated g las

6.1.3.3 R esista nc to r a d ia tion te t

The purpose of this test is to determine whether the

lg ht transmit ance of laminated g las , when

ex osed to ra iation ov er an extended period of

time, is sig nificantly reduced or whether the

material is sig nificantly dis oloured

6.1.3.4 Humid ity te t

The purpose of this test is to determine whether a

laminated g las wi l withstand the efect of

h mid ity in the atmosphere ov er an extended period

of time without sig nificant d efects

6.1.4 O pt ical qual tie

6.1.4.1 Light tr a nsmis ion te t

The purpose of this test is to determine whether the

reg ular transmit ance of lght throug h safety g las

exce d s a specified v alue

6.1.4.2 O ptca l d istor tion te t

The purpose of this test is to v erify that objects

v iewed throug h a winds re n are not distorted to an

extent lkely to confuse the driv er

6.1.4.3 Se ond a r y ima ge s pa r a tion te t

The purpose of this test is to v erify that the ang ular

sep ration of the second ary imag e fom the primary

imag e d oes not exce d a specified v alue

6.1.4.4 Id entfica tion o colour s te t

The purpose of this test is to v erify that a

winds re n d oes not cause confusion of colour se n

7.2 A safety g las product shal be de med to comply

with the req uirements of this British Stand ard if al

the requirements specified in the a propriate

clauses indicated in Ta le 2 hav e be n satis ied

8 Appl cation for approval and

modifica tion ofthe product

The procedure for a ply ing for a prov al of a

categ ory of g las , an the information it is neces ary

to prov ide with the a plcation, are included in

Appendix J The proced ure to be fol owed in the

ev ent of subseq uent modification of the safety g las

or g roup of wind sc e ns for which a prov al was

orig inaly g ranted is also des ribed in Appendix J

Ta le 2 — Tests spe ified for the categ ories of g las defined in 2.4 and 2.5

9.1 General

Identification marks on safety g las ,comply ing with

the req uirements of 9.2, 9.3 or 9.4 as a propriate,

shal be ar ang ed in close proximity to each other

an to any relev ant a prov al mark

9.2 Marking on toug hened safety g las

The fol owing p rticular shal be ind elbly an

distinctly marked b the man facturer on ev ery

piece of toug hened safety g las ac epted for g lazing

in a lan v ehicle:

a) the name, reg istered tra emark or BS lcence

n mber of the man facturer;

b) in the case of u iformly heat toug hened g las ,

the let er “ T” or the word “tempered ” or

“ toug hened”;

c) in the case of a z ne toug hened wind sc e n, the

let er “W T”;

d) in the case of a u iformly toug hened safety

g las winds re n for a slow mov ing v ehicle, the

let er “ W ”;

e) the number of this British Stand rd,

i.e.BSAU17 a

1)

f) a mark identify ing the d te, at least to the

nearest month, an the site of man facture

NOT I is strong ly recommen ed that, in case of asy mmetrical

win s re ns,there should b an ad esiv la el on the

win s re n in icatng whether i is inten ed for a left-han driv

or rig ht-han driv v hicle

Toughened Lam inated

C.2d

Resistance to ra iation

A.8.1b

A.8.1b

The pro isions concerning ptcal quali es in A.8 shal a ply to win ows that are neces ary to comply wih any re uirements

concerning the driv r’s field of view in al directons

Marking BS AU1 8 on or in relaton to a prod ct re resents a man facturer’s declaraton of conformiy, i.e a claim b or on

b half of the man facturer that the prod ct me ts the re uirements of the stan ard The ac uracy of the claim is therefore solely

the resp nsibiliy of the p r on making the claim S ch a declaraton is not to b confused wih third p rty certficaton of

conformiy,which ma also b desira le

9.3 Marking on laminated safety g las

The folowing p rticular shal be ind el bly and

d istinctly marked b the man facturer ( except as

indicated in 9.4) on ev ery piece of laminated safety

g las ac epted for g lazing in a lan v ehicle:

a) the name, reg istered tra emark or BS l cence

number of the man facturer;

b) in the case of a non-wind sc e n g las ,the word

“ laminated” or the let er “ L”;

c) in the case of a wind sc e n, the word s

“ laminated winds re n” or the let er “ W L”;

d ) in the case of a treated laminated winds re n,

the words “ treated laminated winds re n” or the

let er “W LT”;

e) the n mber ofthis British Stand ard,

i.e BS AU17 a

2)

f) a mark identify ing the d te, at least to the

nearest month, and the site of man facture

9.4 Marking on lam inated safety g las cut f om

stock sizes

In the case of laminated g las she ts in stock siz s

that are sup led for cut ing and fit ing b stockists,

the req uirements of 9.4.1 to 9.4.3 shal a ply

9.4.1 The manufacturer shal a ply to each she t

the a propriate marking s as specified in 9.3

9.4.2 The stockist, b ag re ment and ar ang ement

with the manufacturer, shal ensure that ev ery

piece of g las cut f om a stock siz shal be indelbly

an distinctly marked with the a propriate

marking s as specified in 9.3

9.4.3 In a dition, the stockist shal mark on every

piece of g las cut f om a stock siz a means of

identification of the stockist, d etai s ofwhich shal

be sup led to the manufacturer concerned

2)

Marking BS AU 1 8 on or in relaton to a prod ct re resents a man facturer’s declaraton of conformiy,i.e.a claim b or on

b half of the man facturer that the prod ct me ts the re uirements of the stan ard.The acuracy of the claim is therefore solely

the resp nsibiliy of the p r on making the claim.S ch a declaraton is not to b confused wih third p rty certficaton of

conformiy, which ma also b desira le

Appendix A Genera l test c nditions

A.1 Frag m entation test

A.1.1 Te t method

A.1.1.1 The test piece shal not be clamped; it may ,

howev er, be fastened to an id entical piece of g las b

a hesiv e ta e al round the edg e

A.1.1.2 To obtain fag mentation, a hammer of

a proximately7 g or other a pl ance g iv ing

eq uiv alent results shal be used The ra ius of

curv ature of the point shal be0.2 ± 0.0 mm

A.1.1.3 One test shal be car ied out at each of the

pres ribed points of imp ct ( se Fig ure 2 and

Fig ure 3)

A.1.1.4 A record shal be ma e of the f ag ments on

contact photog ra hic p per, ex osure commencing

not more than10s after imp ct an terminating not

more than3min after imp ct Only the d rkest

lnes, representing the initial facture shal be

taken into consideration The la oratory shal

retain the photog ra hs of the fag mentation

A.2.1.1 The test shal be car ied out b means of a

sold, hardened ste l b l fal ng fe ly f om a

specified heig ht, or g iv en a v elocity eq uiv alent to

that obtained b the f e fal The mas of b l shal

be defined for the diferent ty pes of safety g las an

the b l shal fal within25mm of the centre of the

test piece

W hen a dev ice to project the b l is used, the

tolerance on v elocity shal be ± 1% of the v elocity

eq uiv alent to that obtained b the fe fal

A.2.1.2 W hen the b l fal s fe ly , it shal be

released without any impetus being g iv en to it

( e.g b using an electromag net)

Fig ure 2 — Spe ified points of impact for windscre ns

The points 2 g iv en in ( a), ( b) an ( c) are ex mples of the location of the point 2 pres ribed in C.5.1.

Fig ure 3 — Spe ified points of im pact for toug hened g las windows other than windscre ns

A.2.2 Sup o ts f r t est pie e

A.2.2.1The test piece shal be mou ted on a sup ort

( se Fig ure 4) consisting of two ste l f ames, with

machined edg es 15mm wid e, fit ing one ov er the

other and faced with rub er g askets

a proximately3mm thick and15mm wide, of

hardnes 5 IRHD ( Shore hard nes A.5 )

A.2.2.2 The lower f ame shal rest on a ste l box

a out15 mm hig h

A.2.2.3 The test piece shal be held in place b the

up er f ame which shal hav e a mas of a out3kg

The a p ratus shal be weld ed onto a she t of

ste l1 mm thick resting on a she t of rub er of

hardnes 5 IRHD and a out3mm thick, placed on

a rig id b se, e.g a substantial conc ete b se

The method shal be in ac ord ance with the test

method specified in clause5 or clause6 of

A.3.1.1 Sup or t fr sa mple ( Se Fig ure 5)

A.3.1.1.1 The sample shal rest fe ly on a strip of

rub er, of hard nes 7 IRHD and a out3mm thick,

placed on a sup ort, the wid th of contact al rou d

the perimeter being a out15mm

A.3.1.1.2 The sup ort shal consist of a rig id piece of

softwo d of minimum thick es 7 mm conforming

to the sha e of the sample, an shal be ar ang ed in

such a wa that the hea form d es ribed in A.3.1.3

strikes the insid e of the winds re n at its centre in

the cour e of the test

A.3.1.1.3 The sup ort shal rest on a she t of rub er,

of hard nes 7 IRHD an a out3mm thick, placed

on a rig id b se, e.g a substantial conc ete b se

A.3.1.2 Sup or t f r te t pie e

A.3.1.2.1The test piece shal be clamped in the test

f ame shown in Fig ure 6, b means of at least eig ht

bolts

A.3.1.2.2 The fixture is composed of two ste l

f ames, with machined edg es, 5 mm wid e, fit ing

one ov er the other and faced with rub er g askets

a out3mm thick and15 ± 1mm wid e of

hardnes 7 IRHD

A.3.1.2.3 The test f ame shal be placed on a rig id

b se, e.g a substantial conc ete b se

A.3.1.3 Hea d f r m

A.3.1.3.1The hea form ( se Fig ure 7) shal consist

of the folowing elements

a) A sold spherical or semispherical hea ma e

of laminated hard wo d of d iameter19 ± 2mm

The lower hemisphere of the hea shal be

cov ered with replacea le felt a out5mm thick.Figure 4 — Support for bal tests

Fig ure 5 — Support for samples (hea form test)

The minimum recommend ed torque for M20 bolts is 3 N·m

Fig ure 6 — Support for test pie es (head form test)

b) A mou ting rod betwe n5 0mm

and1 0 0mm long and weig hing les

than0.5kg

A.3.1.3.2 The hea form ma also incorporate the

folowing elements:

a) a rigid intermed iate piece of hardwo d7 mm

long and10 mm in diameter;

b) a c os beam ma e of wo d an representing

the shoulder , a out5 0m long and

a out10 mm wid e The thick es of this c os

beam shal be such that the total mas of the hea

form shal be10 ± 0.2 kg

A.3.1.3.3 Means for drop ing the hea form fe ly

f om a heig ht shal be specified , or a means for

g iv ing it a v elocity equiv alent to that obtained b

the fe fal

W hen a dev ice to project the hea form is used , the

tolerance on v elocity shal be ± 1 % of the v elocity

eq uiv alent to that obtained b the fe fal

A.3.2 Te t conditions

Temperature: 20 ± 5 °C

Pres ure: 8 0mb r to1 0 0mb r

Relativ e h midity : 6 ± 20 %

A.3.3 Te t met hod

The method shal be in ac ord nce with the test

method specified in9.3 of ISO3 3 :19 5

A.3.4 Int erpretation o re ults

Se B.6.3, D.3.3, D.4.3 and E.3.3

A.4 Abrasion resistanc test

A.4.1 A pparatus

The folowing a p ratus is required

A.4.1.1 A br a d ing instr ument

4)

shown

diag rammatical y in Fig ure 8, and consisting of the

folowing :

a horiz ntal turnta le and centre clamp which

rev olv es counter-clockwise at6 r/min

to7 r/min;

two weig hted p ralel arms, each car y ing a

special a rasiv e whe l rotating fe ly on a

b l bearing horiz ntal spind le, each whe l rests

on the test specimen u der the loa exerted b a

mas of5 0g

The turnta le of the a ra ing instrument shal

rotate reg ularly an substantialy in one plane The

dev iation fom this plane shal be not g reater

than0.0 mm at a d istance of1.6mm f om the

turnta le periphery Fig ure 7 — Hea form

4)

For informaton on the a aila iliy of a rading instruments wrie to Customer Informaton, BSI,Linford W ood,Milton

Ke nes, MK1 6L

The whe ls shal be mou ted in such a wa that,

when they are in contact with the rotating test

specimen, they rotate in contrary directions so as to

exert a compres iv e an a rasiv e action along

curv ed lnes ov er an an ular area of a out 3 0mm

2

,

twice during each rotation of the test specimen

A.4.1.2 A br a sive whe ls

)

each4 mm to5 mm in

diameter and1 5mm thick, composed of a special

finely s re ned a rasiv e embedd ed in a

med ium-hard rub er The whe ls shal hav e an

IRHD hardnes of72 ± 5, measured at four points

eq ualy sp ced on the centre l ne of the a ra ing

surace with the pres ure a pl ed v ertical y along a

diameter of the whe l, the rea ing being taken10s

after ful a pl cation of the pres ure

The a rasiv e whe ls shal be prep red for use b

v ery slow rotation ag ainst a she t of flat g las

A.4.1.3 Light sour ce, consisting of an incandes ent

lamp, the fiament of which is contained within a

p ral elepiped1.5mmI 1.5mm × 3mm The

v oltag e at the lamp terminals shal be such that the

colour temperature is28 6 × 5 K This v oltag e

shal be sta i z d within ± 1 % The instrument

used to check the v oltag e shal be of a propriate

ac uracy

A.4.1.4 Optca l system, consisting of a lens with a

focal leng th of at least5 0mm an cor ected for

chromatic a er ations The clear a erture of the

lens shal be ad justed in ord er to obtain a lg ht beam

that is substantial y p ralel

A d ia hrag m shal be inserted to lmit the diameter

of the l g ht beam to7 ± 1 mm.This dia hrag m shal

be situated at a distance of10 ± 5 mm f om the

lens on the sid e remote f om the l g ht sour e

A.4.1.5 Equipment f r mea sur ing s a tter ed lght

(ha zemeter ) ( se Fig ure 9), consisting of a

photo lectric cel with an integ rating sphere of

diameter of20 mm to25 mm The sphere shal be

eq uip ed with entrance an exit ports for the l g ht

The entrance port shal be cir ular and hav e a

diameter at least twice that ofthe l g ht beam The

exit port of the sphere shal be prov id ed with a lg ht

tra an with a reflectance stand rd The lg ht tra

shal a sorb al the lg ht when no test specimen is

inserted in the l g ht beam

The a is of the lg ht beam shal p s throug h the

centre of the entrance and exit ports.The diameter,

b, of the lg ht exit port shal be equal to2a tan4°,

where a is the d iameter of the sphere The

photo lectric cel shal be mounted in such wa that

it can ot be reached b l g ht coming directly f om

the entrance port or f om the reflectance stand ard

The sur aces of the interior of the integ rating sphere

an the reflectance stand ard shal be of

substantial y equal reflectance, and shal be mat

The output of the photo lectric cel shal be l near

within2 % ov er the rang e of luminous intensity

used The desig n of the instrument shal be such

that there is no g alv anometer deflection when the

sphere is d rk The whole a p ratus should be

checked at reg ular interv als b means of cal bration

stand rds of defined haz

I haz measurements are ma e using eq uipment or

method s difering fom the a ov e, the results shal

be cor ected in ord er to be in ag re ment with those

obtained b the a p ratus des ribed

A.4.2 Te t pie e

The test pieces shal be flat squares of sid e10 mm

hav ing both suraces substantialy plane and

p ralel, and with a6.5 ± 0 mm d iameter hole

dri led in the centre

A.4.3 Preparation o t est pie e

A.4.3.1 Immediately before an after the a rasion,

clean the test pieces in the folowing man er

a) W ipe with a l nen cloth u der clean ru ning

water

b) Rinse with disti led or demineral z d water

c) Blow dry with oxy g en or nitrog en

d) Remov e pos ible traces of water b d ab ing

softly with a d mp l nen cloth; if neces ary , d ry

b pres ing l g htly betwe n two lnen cloths

Any treatment with ultrasonic equipment shal be

av oided

After cleaning , the test pieces shal be handled only

b their edg es and shal be stored to prev ent d mag e

to, or contamination of, their suraces

A.4.3.2 Condition the test specimens prior to testing

for a minimum time of4 h at20 ± 5 °C

and5 ± 2 % relativ e humid ity

A.4.4 Te t met hod

A.4.4.1 Immediately after completion of the

conditioning period place test piece ag ainst the

entrance port of the integ rating sphere The ang le

betwe n the normal to the surace of the test piece

and the a is of the beam shal not exce d8°

Take four rea ing as ind icated in Ta le 3

Ta le 3 — Rea ing s required for a rasion

resistanc testFig ure 9 — Equipm ent for m easuring scat ered l g ht (hazemeter)

Rea ing With

Repeat read ing s for T

1, T

2, T

3and T

4with

a d itional specified positions of the test piece to

d etermine uniformity

A.4.4.2 Determine the initial haz of the test

specimen at a minimum of four eq ual y sp ced

points in the u a rad ed area in ac ord ance with the

formula in A.4.5.1

Av erag e the results for each test specimen As an

alternativ e to making four sep rate measurements

an av erag e v alue ma be obtained b rotating the

test piece u iformly at3r/ s or more

A.4.4.3 For each ty pe of safety g las , car y out thre

tests with the same loa on the side representing

the outer sur ace of the g las Use the haz as a

measure of the surace a rasion after the test piece

has be n subjected to a rasion for 10 0 cy cles

A.4.4.4 Determine the lg ht s at ered in the a rad ed

track at a minimum of four equal y sp ced points

along the track in ac ord ance with the formula

inA.4.5.1 Av erag e the results for each test piece

As an alternativ e to making four sep rate

measurements an av erag e v alue ma be obtained b

rotating the test piece u iformly at 3r/ s or more

A.4.5 Calculat ion and int erpret at ion o re ult s

A.4.5.1 Calculate the total transmit ance

Calculate the per entag e haz or l g ht s at ered, or

both, as folows:

Haz or lg ht s at ered, or both =

A.4.5.2 S btract the av erag e initial haz f om the

av erag e total lg ht s at ered, the d ifer ence

representing the lg ht s at ered as a result of

a ra ing the test piece.Calculate this d iference for

the sur ace a rasion

A.4.5.3 Safety g las shal be consid ered satis actory

fom the point of v iew of a rasion resistance if the

lg ht s at ered as a result of a rad ing the test piece

d oes not exce d2 %

A.5 Hig h temperature test

A.5.1 Te t method

A.5.1.1 The test pieces shal be immer ed v ertical y

for3min in water at a proximately6 °C, then

plu g ed ra idly in the same wa into boi ng water

and kept there for2h

A.5.1.2 I the test is car ied out on a test piece cut

fom a winds re n, the sur ace area shal be not les

than3 0mm × 3 0mm,bou ded on one side b the

up er ed g e of the winds re n

A.5.2 Int erpret at ion o re ult s

A.5.2.1 The test shal be de med to hav e g iv en a

positiv e result if bub les or other defects are not

formed more than15mm fom the outer edg e of the

test piece or more than10mm fom any c acks

which ma oc ur d uring the test

A.5.2.2 No ac ou t shal be taken of bub les or

defects within25mm of the cut edg e of a test piece

cut f om a wind sc e n

A.5.2.3 A set of test pieces submit ed for a prov al

shal be consid ered satis actory as reg ards the hig h

temperature test if either of the conditions g iv en in

a) or b) is fulfi ed

a) All the tests g iv e a positiv e result

b) One test hav ing g iv en a neg ativ e result, a

further series of tests car ied out on a new set of

test pieces al g iv e positiv e results

A.6 Resistanc to ra iation test

A.6.1 Te t method

A.6.1.1 Each test piece or sample ( total number

thre pieces) shal be submit ed to ra iation in

ac ord nce with the procedure specified in clause5

of ISO3 17:19 6, such that the ra iation on each

point of the test piece or sample produces, on the

interlay er used, the same efect as that which would

be produced b a solar ra iation of 1 4 0 W /m

2

for10 h

A.6.1.2 Maintain the temperature of the test pieces

at4 ± 5 °C throug hout the test

A.6.2 Interpretation o re ults

A.6.2.1 The test for resistance to ra iation shal be

d eemed to hav e g iv en a positiv e result if the

cond itions in a) and b) are fulfi led :

a) the total luminous transmit ance do s not fal

below9 % of the orig inal v alue before

ir ad iation, or below7 %, the transmit ance

being measured in ac ord nce with clause 5 of

ISO3 3 :19 8;

b) if the test is car ied out on a test piece cut f om

or representing a wind sc e n, the total

transmit ance remains g reater than7 % in the

z ne where the reg ular transmit ance is to be

checked, as d efined in A.8.1.7

A.6.2.2 The test piece ma show a slg ht coloration

after ir a iation when ex mined ag ainst a white

b ckg rou d , but no other defect shal be a p rent

A.6.2.3 A set of test pieces submit ed for a prov al

shal be consid ered satis actory fom the point of

v iew of sta i ity if either of the fol owing conditions