IS 11769-2: Guidelines for safe use of products containing asbestos, Part 2: Friction materials

2005·1 MB·English

by  Bureau of Indian Standards

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IS 11769-2 (2005): Guidelines for safe use of products
containing asbestos, Part 2: Friction materials [CED 53:
Cement Matrix Products]
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IS 11769 (Part 2) :2005

m2wh71T1’Fnf)
Indian Standard
GUIDELINES FOR SAFE USE OF PRODUCTS
CONTAINING ASBESTOS
PART 2 FRICTION MATERIALS
(First Revision)
ICS 13.100

Q BIS 2005
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002
December 2005 Price Group 2
Cement Matrix Products Sectional Committee, CED 53
FOREWORD
This Indian Standard (Part 2) (First Revision) was adopted by the Bureau of Indian Standards, afler the draft
finalized by the Cement Matrix Products Sectional Committee had been approved by the Civil Engineering
Division Council.
This standard was fust published in 1986considering that exposure.to asbestos dust canhave harrnfid effects on
the health of workers and therefore, to lay down the guidelines on how the risk of exposure to asbestos dust
emission can be prevented, controlled or minimized. This standard, lays down the guidelines for safe use of
products containing asbestos, has three parts. This standard lays down the guidelines for safe use of friction
materials containing asbestos. Guidelines for safe use of‘asbestoscement products and non-cement asbestos
products other than friction materials are covered inParts 1and 3 of this standard, respectively. This standard
laysdown guidelines regarding safeuseandservicingofdifferent frictionproducts containing asbestos, improving
conditions in workplaces, preventive measures, cleaning, packaging, transport and disposal of asbestos waste,
precautionary warnings, etc. This revision has elaborated the products covered under friction materials and the
various dust generating operations. The other parts inthis series are:
Part 1 : Asbestos cement products
Part 3 : Non-cement asbestos products other than friction materials
In the formulation of this standard, due weightage has been given to international co-ordination among the
standards andpractices prevailing indifferent countries inaddition torelating ittothepractices inthefield inthis
country. This has been met by deriving assistance from ‘ILO Codes ofpractice: Safety inthe use of asbestos’,
1984published by International Labour Office, Geneva and Schedule XIV on ‘Handling and processing of
asbestos’, framed under Section 87 of Factories Act.
IS 11769 (part 2): 2005
Indian Standard
GUIDELINES FOR SAFE USE OF PRODUCTS
CONTAINING ASBESTOS
PART 2 +RICTION MATERIALS
(First Revision)
1 “SCOPE 4.2 Hand tools or low-speed tools producing coarse
dust or chips should be used rather than high-speed
1.1 This standard (Part 2) lays down the guidelines
machines or those which cut by abrading the
for safe use of ti-ictionmaterial containing asbestos.
material.
1.2 These guidelines are applicable to asbestos
4.3 Fixedworkingpointsormachines havingpotential
containing friction material (mould and woven)
to generate airborne asbestos dust shall have an
(see Fig. 1),such as:
appropriate and effective dust extraction system
a) Brake lining materials in roll, strip or sheet installed, with sufllcient velocity soastomaintain the
form; fibre limitswithin the stipulated threshold levels.
“b) Brake blocks;
5 USE OF FRICTION MATERIAL
c) Brake liners;
d) Brake lining segments; 5.1 These recommendations shall cover all dust
generating operations, such as:
e) Disc brake pads;
8 Clutch facings; a) Grinding,
!3) Automotive transmission discs and band b) Cutting,
liners; and c) Drilling,
h) Industrialbrakeliningsand-clutchfacings,etc. d) Sawing,
,
e) Fitting,
2 REFERENCES
t) Machining,
The standards listed in Annex A contain provisions
g) Finishing, and
which through reference in th is text, constitute

h) Cleaning or any other dust generating
provisions ofthis standard. Atthetim e ofpublication,

operations.
the editions indicated were valid. All standards are
subject to revision and parties to agreements based on 5.2 Vacuumcleaningequipmentshallbeusedtocollect
this standard are encouraged to investigate the dust and chips.
possibility of applying the most recent editions ofthe
5.3 Whenever hand tools and low speed tools are
standards indicated inAnnex A.
used, use of water drip is recommended. When dust
3 OBJECT extraction unit is provided, use of water drip is not
required.
The object ofthis standard istorecommend andguide
those engaged in the assembly, application and 5.4 Appropriate dust extraction equipment shall be
servicing ofti-ictionmaterialscontaining asbestosfibre. fitted to every cutting, drilling or grinding machine to
This shall be adopted to ensure that friction materials eliminate dust. High velocity,‘lowvolume equipment
containing asbestosareusedsafelyandwithoutharrntid shall be used for portable tools.
emission of asbestos dust.
5.5 Whenlinings,blocksandclutchfacingsareriveted
4 BASIC REQUIREMENTS FOR WORKING by using machine, dust extraction equipment shall.be
WITH ASBESTOS CONTAINING FRICTION provided (see Fig. 2).
MATERIAL
5.6 All exhaust ventilation equipment shall be
4.1 Friction materials shall, as far as practicable, inspected and tested everyday for its effectiveness.
be supplied already cut, machined or drilled to Record of every such inspection shall be maintained
requirements. and retained.
IS 11769 (Part2) :2005
BRAKE LININGS
CLUTCH FACINGS
DISCPADS BRAKE BLOCK
.FIG.1 ASBESTOSCONTAININFGRICTIONPRODUCTS

FIG.2 DUSTEXTRACTIOUNNIT

2
IS 11769 (part 2): 2005
6 SERVICING OF BRAKES AND CLUTCHES IN waste material shall be thoroughly wetted before
WORKSHOPS AND GARAGES removal. Cleaning shall be done in accordance with
the provisions laid down in IS 11767.
6.1 When removing worn friction material, the
accumulated dust shall be removed by a vacuum 7.3 Loose swarf and dust collected fkom fabrication
cleanerdrum or by spraying with sufficient quantity processes shallbecollected fordisposal inacontrolled
ofwater. Whenvacuum cleaner isused itshallbefitted manner. Strong plastic bags are suitable form of
with ahigh efficiency filter. impermeable container.
6.2 Whensuchoftheabove facilitiesarenotavailable, 7.4 Broken and worn linings may not normally
dust shall be removed with adamp cloth. produce harmfid quantities ofdust.However, to avoid
unnecessary anxiety, where such materials occur in
6.3 Compressed air or dry brushing shall not be used
quantity, these shall be collected and disposed in
toremove accumulated dust.
controlled manner. Disposal of waste shall be in
6.4 Loose swarf and dust shall be removed from the accordance with provisions laid down in IS 11768.
workplace by vacuum cleaning. Where this is not
possible thematerial shallbethoroughly wettedbefore 8 WARNING
removal. Packages offriction material containing asbestos shall
bear.a pictorial warning signandprecautionary notice
6.5 Working areas shall be free from dust and shall
asgiven inIS 12081 (Part 2) to caution the usersthat
be thoroughly wetted before sweeping.
these products contain asbestos fibres and improper
6.6 At alltimes friction materials shall besupplied to use of these materials may result in generation of
meet the specific requirements without any extra asbestos dust, inhalation of which may cause serious
finishing operations. If any finishing operations are damage to health.
required, this shallbecarried outonlywithhand-tools.
Power saws or abrasive disc shall not be used unless 9 MATERIAL DATA SHEET
exhaust ventilation equipment is attached to them in
Asbestos containing friction materials are required to
operation.
be accompanied by material safety data sheet
6.7 Where products require machiningoperation this containing the following information:
shall be performed under exhaust ventilation.
a) Product designation,
6.8 Beforeapplyingadhesivetobondsegmentstobrake b) Name and address of manufacturer of the
shoes, surface dust shallbe cleaned by damp cloth. product,
c) Health hazards that might arise due to its
7 WASTE DISPOSAL
constituents including asbestos,

7.1 Wastematerial shallnotbeallow ed toaccumulate d) Precautionary information regarding handling

onthe floor. All working areas shall be kept clean by
ofthe product, and
regular use of vacuum cleaner.
e) Procedure for cleaning and safe disposal of
7.2 Where vacuum cleaning is not practicable, the waste.
ANNEX A
(Clause 2)
LIST OF REFERRED INDIAN STANDARDS
1SNo. Title ISNo. Title
IS 11767:1986 Recommendations for cleaning of IS 12081 Recommendations for pictorial
premises and plants using asbestos (Part 2): 1987 warning signs and precautionary
fibres notices for asbestos and products
IS 11768:1986 Recommendations for disposal of containing asbestos: Part 2Asbestos
asbestos waste material and itsproducts
3
Bureau of Indian Standards
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Review of Indian Standards
Amendments are issued-to standards asthe need arises on the basis of comments. Standards are also reviewed
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needed; if the review indicates that changes are needed, it istaken up for revision. Users of Indian Standards
should ascertain that they are inpossession ofthe latest amendments or edition byreferring tothe-latest issue of
‘BIS Catalogue’ and ‘Standards :Monthly Additions’.
This Indian Standard has been developed from DQC:No. CED 53 (7198).
Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
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