IS 15143: Conveyor Belting of Elastomeric and Steel Cord Construction for Underground Mines and Such Other Hazardous Applications

41 Pages·2002·2.8 MB·English

by  Bureau of Indian Standards

इंटरनेट मानक
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.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 15143 (2002): Conveyor Belting of Elastomeric and Steel
Cord Construction for Underground Mines and Such Other
Hazardous Applications [PGD 31: Bolts, Nuts and Fasteners
Accessories]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

,!
Is 15143:2002
Ww’hr
911*

q--pJmhnw-F?i@hml?&N=l
$ R-q qdlaiw 4)?
G< WJwi
II* ‘Pi
a
~@wiwll m W2 –
\
fml(k
IndianStandard
CONVEYOR BELTING OF ELASTOMERIC AND STEEL
CORD CONSTRUCTION FOR UNDERGROUND
MINES AND SUCH OTHER HAZARDOUS
APPLICATIONS —SPECIFICATION
I
ICS 53.040.20; 73.100.01
---
[“ ;
p ;

0 BIS2002
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

I
September 2002 Price Group 12
i
Pulleys and Belts Sectional Committee, BP29
FOREWORD
This Indian Standard wasadopted bythe Bureauof Indian Standards, afterthe draft finalized bythe Pulleys and
Belts Sectional Committee had been approved by the Basic and Production Engineering Division Counci1.
A standard on specification for conveyor belting of elastomeric and steel cord construction for underground
minesandsuchother hazardous application wasfeltnecessary togivesatisfactory quality ofthisspecial purpose
conveyor belting.This standardwillbeusefulforapplication underhazardous conditions, suchas,inunderground
mines application and in places subjected to fire hazards.
For the purpose of deciding whether aparticular requirement ofthis standard iscomplied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
1S2: 1960‘Rulesforrounding offnumerical values (revised)’. Thenumber ofsignificant places retained inthe
rounded off value should be the same asthat ofthe specified value inthis standard.

.
.
IS 15143:2002
IndianStandard
CONVEYOR BELTING OF ELASTOMERIC AND STEEL
CORD CONSTRUCTION FOR UNDERGROUND
MINES AND SUCH OTHER HAZARDOUS
APPLICATIONS — SPECIFICATION
1SCOPE andthe user, the width ofthe belting shall atno point
vary from the nominal width by more than the given
This standard covers therequirement for fireresistant
inTable 1.
conveyor belting made from tire resistant elastomeric
compounds and steel cord reinforcement for use in
Table 1Tolerance on Belt Width
underground mines and such other hazardous
applications where risk of fire is involved. Alldimensionisnmillimetres.
(Clause 3.2.1)
2 REFERENCES
Nominal Maximum Nominal Maximum
2.1Thefollowing Indian Standards contain provisions Belt Width Tolerance Belt Width Tolerance
800 +8 1500 l 12
which through reference in this text, constitute 900 *9 1600 * 12
provisions ofthis standard. Atthetime ofpublication, 1000 &10 1800 i 14
the additions indicated were valid. All standards are 1050 i 10 2000 l 14
subject to revision, andparties to agreement based on 1200 *11 2200 l 15
1350 * 12 2400 * 15
this standard are encouraged to investigate the possi-
1400 &12 2.500 * 15
bility of applying the most recent editions of the
standards indicated below:
3.2.2 Edge Width Free of Cord
ISNo. Title
At each edge of the belting the distance between the
3400 Methods of test for vulcanized
edge and the outer surface of the outer cord shall be
rubbers:
not lessthan 15mm and not more than 50 mm from
(Part 1): 1987 Tensile stress-strain properties
edge ofbelting.
(second revision)
(Part 2): 1995 Hardness (second revision) 3.3 Thickness of Belt and Covers
(Part 3): 1987 Abrasion resistance using arotating
cylindrical drum device ($irst Specified nominal = Nominal top cover thickness
revision) belt thickness +Nominal bottom cover
3 DIMENSIONS thickness + Nominal cord
diameter.
3.1 Length 3.3.1 The methods of measuring belt thickness and
cover thickness shall be inaccordance with Annex A
The length of belt and tolerance thereon shall be in
and Annex B,respectively.
accordance with the following requirements:
,
3.3.2 Tolerance on Total BeIt Thickness
a) The length of belt shall be free from factory
made splices. For belt thickness <20 mm is + 10percent
–1.Omm
NOTE — This requirement may be waived by the
i
purchaser sothatasingle splice ispermitted. For belt thickness 220 mm is + 10percent
b) There shall be no negative tolerance on belt –1.5mm ..
manufactured to a length specified by the
The difference between any two ofthe measurements
purchaser.
taken shall not exceed 10percent of the mean belt
NOTE — Wheremultiplerollsaresuppliedforuseona thickness.
given conveyor, the‘nonegative’ tolerance applies only
totheoverall length. 3.3.3 Cover Thickness
3.2 Width 3.3.3.1 The cover thickness at any one point is the
distance from the outer surface of the cord to the
3.2.1 Tolerance on Belt Width
surface ofthebelt. The specified cover thickness shalI
Unless otherwise agreed to between themanufacturer include anytransverse reinforcement. Themean cover

1
Is 15143:2002
,
thickness shall be within –1.0 mm and +1.5 mm of 4.2 Steel Cord
the specified nominal cover thickness.
4.2.1 Thecordsshallconsist ofwire ropes, constructed
3.3.3.2 Where visual examination of vertical cord to withstand the effects of flexing during the life of
position indicates the necessity of measuring cover belting. The tolerance on the chosen diameter of the
thickness above orbelow several individual cords,this cords shall be asgiven in Table 3.
shall be carried out, using a steel ruler graduated in
0.5mm oradepth gauge butignoring anylocalsurface 4.2.2 The method of determining cord diameter shall
unevenness (forexample, brands). Thecoverthickness be in accordance with Annex C.
above or below any cord shall not vary from mean
4.2.3 The wires of the raw cord shall be protected
cover thickness by more than + 1.5mm.
againstcorrosion during transport, storage andcoated,
ifnecessary, to provide the required adhesion.
4 GENERAL REQUIREMENTS
4.3 Belt Data
4.1 Construction
4.3.1 The following data shall be specified by the
The belting shall primarily consist of one layer of
supplier when either applying or tendering for a
longitudinal steel cords embedded in fire resistant
specific application:
compounds. Additional transverse reinforcements may
be included. The whole belt shall be cured or a) Minimum belt strength in kN/m,
vulcanized together in accordance with the best b) Nominal belt thickness and nominal cover
manufacturing practice. The belt edges shall be thickness in mm,
completely sealed against ingress of moisture by fire c) Nominal cord diameter in mm and cord
resistant compounds. Suggested parameters of constructions,
conveyor belting are given inTable 2.
d) Minimum cord strength in kN,
Table 2 Designation and Suggested Parameters of Conveyor Belting of
Elastomeric and Steel Cord Construction
(Clause 4.1)
Belting Steel Cord Number
Designa- Belting
tion Reinforcement Belt Width, mm
Cord Cord 600 650 750 800 850 1000 1050 1200 1400 1500 1600 18002000220025003000 3500
Break- Pitch,
ing mm
Force,

Min
kN
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20)
ST 500 7.3 13.8 42 45 52 56 63 70 74 84 99 106 113 128 142 156 178 215 219
ST 560 8.2 13.8 42 45 52 56 63 70 74 84 99 106 113 128 142 156 178 215 219
ST 630 9.3 13.8 42 45 52 56 63 70 74 84 99 106 113 128 142 156 178 215 219
ST710 10,3 13.8 42 45 52 56 63 70 74 84 99 106 113 128 142 156 178 215 219
ST 800 11.6 13.8 42 45 52 56 63 70 74 84 99 106 113 128 142 156 178 215 219
ST 900 14.7 15.3 37 40 47 50 56 63 66 76 89 96 102 115 128 141 161 193 207
ST 1000 16.5 15.3 37 40 47 50 56 63 66 76 89 96 102 115 128 141 161 193 207
ST 1120 18.5 15.3 37 40 47 50 56 63 66 76 89 96 102 115 128 141 161 193 207
ST 1250 20.6 15.3 37 40 47 50 56 63 66 76 89 96 102 115 128 141 161 193 207
ST 1400 23.1 15.3 37 40 47 50 56 63 66 76 89 96 102 115 128 141 161 193 207
ST 1600 29.1 17.3 33 36 42 45 50 56 59 67 79 85 90 102 113 124 142 171 183
ST 1800 32.7 17,3 33 36 42 45 50 56 59 67 79 85 90 102 113 124 142 171 183
ST 2000 36.4 17.3 33 36 42 45 50 56 59 67 79 85 90 102 113 124 142 171 183
ST 2240 41.0 17.3 33 36 42 45 50 56 59 67 79 85 90 102 113 124 142 171 183
ST2400 51.1 19.4 30 32 37 40 45 50 52 60 70 75 81 91 101 111 127 152 163
ST 2600 57.1 19.4 30 32 37 40 45 50 52 60 70 75 81 91 101 111 127 152 163
ST 3150 64.6 19.4 30 32 37 40 45 50 52 60 70 75 81 91 101 111 127 152 163
ST 3550 72.8 19.4 30 32 37 40 45 50 52 60 70 75 81 91 101 111 127 152 163
ST 4000 82.0 19.4 30 32 37 40 45 50 52 60 70 75 81 91 101 111 127 152 163
ST 4500 92.3 19.4 30 32 37 40 45 50 52 60 70 75 81 91 101 111 127 152 163
ST5000 102,0 19,4 — — — — 45 50 52 60 713 75 81 91 101 111 127 152 163
ST 5500 113.5 19.4 — — — — 45 50 52 60 70 75 81 91 101 Ill 127 152 163
ST 6000 133.0 20.0 — — — — 43 48 50 58 68 73 78 88 98 108 123 148 158

2
.
Is 15143:2002
e) Nominal cord pitch in mm, and a) For lengths lessthan 50 m, no spliced joints
t) Nominal belt width in mm and number of shall be permitted;
cords. b) For lengths over 50 m, not more than one
spliced joint shall be permitted. Where a
Table 3Tolerance on Cord Diameter
spliced joint ispermitted it shall be not less
(Clause 4.2.1)
than 20 m from either end; and
c) The manufacture shall noti~ the user of the
Cord Diameter Tolerance
position inthebelt length ofanysplicedjoint
mm Percent
made during manufacturing.
<3.35 +6, –1
23.35 to<6.30 +5, –1
5WORKMANSHIP AND FINISH
>6.30 +4, –1
5.1 Freedom from Defects
4.4 Cord Pitch
The surface of finished belting shall be free from
4.4.1 Cords should be evenly spaced across the width blisters, pitting or other major surface flaws and shall
of the belting. When belting is tested in accordance be completely sealed against ingress of moisture.
with the method given in Annex D, the tolerance on
any individual cordpitch compared totheaveragecord 6 SAMPLING
pitch shall be + 1.5mm, except that 5 percent of the
6.1 Selection of the Test Samples
cords may exceed this tolerance by not more than 10
percent of the mean spacing. If a manufacturer submit a sample to the testing
laboratory (for example, DGMS etc) fortype test orto
4.4.2 In addition, no part of the outer cords shall be
check the requirements as per the specification, the
lessthan 15mm orgreater than 50mm from the edge
sample may, atthe option ofthe testing laboratory be
of the belting and the variation in the edge rubber
selected by the manufacturer. When tests are being
thickness shall be not more than 10mm on any one
performed orwitnessed bythe testing laboratory as a
edge.
check that normal supplies are in compliance with
this specification, the sample shall be selected by the
4.5 Joints in Cord
testing laboratory. A sample shall not be tested less
Cordjoints shall be avoided asfar aspossible. Inany than 48 h after completion of manufacture.
length of finished belting, the number of individual
6.2 Length of Sample
spliced cordjoints permitted shall be asfollows:
6.2.1 For Belting of 1600 kN/m Width and Above
a) Not more than onejoint in any one cord,
b) Not more than one-cord joint per 10 m of For belting with top and bottom covers which are
identical, the overall length of the sample shall be -1
belting,
13.0 m. To facilitate handling/transportation, the
c) Not more than one-cord joint in belts
samplemaybesupplied, subjecttoagreement between
containing up to 50 cords,
the manufacturer and the testing laboratory in the
d) Not more than two-cord joints in belts
following pre-cut lengths:
containing 51 to 100cords, and
e) Not more than three-cord joints in belts a) Two pieces, 4.0 m long x 1050 mm wide for
high energy propane burner tests; and
containing over 100 cords.
b) One piece 5.0 m long x full belt width for
4.6 Spliced Joints the remaining tests.
4.6.1 Approval If required by the testing laboratory, belting shall be
supplied aspre-cut testpieces ofspecified dimensions
For fire resistant conveyor beking, the strength ofthe
and quantity.
splicedjoints, the splicing procedure andthe splicing
materials shall be as per the agreement between the For belting with top and bottom cover which are not
user and the manufacturer, identical, the overall length of the sample shalI be
17.0 m. As in above, the sample may be supplied in
4.6.2 Conditions of Supply the following pre-cut lengths.
Where necessary, two lengths offinished belting may
a) Three pieces 4.0 m long x 1050 mm wide
bejoined with asplicedjoint tomakeupanindividual for the high energy propane burner tests.
length as specified by thepurchaser (see3.1), subject
b) One piece 5.0 m long x full belt width for
to the following conditions:
the remaining tests.

3
IS 15143:2002
1frequested by the testing laboratory, belting shallbe
supplied aspre-cut testpieces ofspecified dimensions
and quantity. 7.2.1 Cord Pull-Out Strength
6.2.2 For Belting Below 1600 kN/m Width When tested in accordance with the method given in
Annex F, the minimum allowable cord pull-out
For belting with top and bottom covers which are
strength shaIlbecalculated inkN/m of cord length as
identical, the overall length of the sample shall be
follows :
9m. To facilitate handling/transpot-tation, the sample
may be supplied in the following pre-cut lengths, a) For belts of 1600 kN/m width and above,
subject to agreement between the manufacturer and (8d +38) kN/m of cord length,
the testing laboratory: b) For belts below 1600 kN/m width,
(16d) kN/m of cord length,
a) Two pieces 2.0 m long x 900 mm wide for
where d isthe nominal cord diameter inmm.
the low energy propane burner tests; and
b) One piece 5.0 m long x full belt width for 7.2.2 Cover Adhesion
the remaining tests.
Themeanadhesion strength between cover andbonder
Ifrequested by the testing laboratory, belting shallbe layershallnotbelessthan 10kN/m width, when tested
supplied aspre-cut testpieces ofspecified dimensions in accordance with the method given in Annex G.
and quantity.
7.3 Cover Compound Properties
For beking with top and bottom covers which arenot
The belt cover shall be tested for the following
identical, theoverall length ofthesample shallbe 11.0
properties in accordance with the method given in
m. As in above, the sample may be supplied in the
Annex H :
following pre-cut lengths.
a) Three pieces 2.0 m long x 900 mm wide for Tensile strength 16MPa, Min
the low.energy propane burner tests. Elongation at break 350 percent, Min
b) One piece 5.0 m long x full belt width for
Hardness’) 70+ 5IRHD(or equivalent)
the remaining tests.
Abrasion resistance 200 mm3,Ma
Ifrequested by the testing laboratory, beking shall be
supplied aspre-cut test pieces ofspecified dimensions NOTE — With ageingthecharacteristics ofcover compound can
and quantity. change.
7.4Troughability
7 QUALITY CONTROL SYSTEM AND TESTS
When tested in accordance with the method given in
Manufacturers shall establish and maintain a quality

Annex J, minimum troughablity value shalI be as
control system. The system shall ensure that the

specified in Table 4 for the appropriate trough ing
manufactured products meet the requirements of this
angle.
specification.
7.1 Tensile Strength of Belt and Cords Table 4Troughability
7.1.1 The breaking strength of the belt shall be Troughability Angle, Degrees Troughability, Mirs
calculated from the breaking strength of the cords. (1) (2)
The measured cord strength shall not be lessthan the s20 0.05
minimum cord strength as given in Table 2. >20 s25 0.07
>25 <30 0.09
>30 <35 0.11
Beltstrength = Cord strength (kN) x No. ofcords >35 <40 0,14
Beltwidth (m) >40 <45 0.17
>45 <50 0.21
Unit of belt strength iskN/m of belt width. >50 <55 0,23
7.5 Electrical Resistance
7.1.2 The testing for cord strength shall be carried
out on either ofthe following: Electrical resistance shall be measured inaccordance
with the method given in Annex K and the average
a) Embedded cord (in accordance with the
valueonboththeupperandlowersurfaceofthebelting
method given in Annex E), and
b) Unprocessed cord (subject to agreement
between supplier and user). 1)The equivalent shoreAvaiue k 70°.

4
Is 15143:2002
shall be not greater than 3x10*C?.This figure shall results recorded uptothe time oftermination shalIbe
also represent a maximum during the working life of reported.
the belt.
7.6.4 Low Ener~ Propane Burner Test
7.6 Fire Test Requirements Steelcord belts shallbetested by lowenergy propane
t
I 7.6.1 Drum Friction Test burner test method given in Annex P for belts below
1600 kN/m width.
a) The belting shall be tested by the method
described in Annex L and there shall be no 7.6.4.1 Acceptance criteria
flame or glow on any part of any one of the When tested in accordance with the method given in
test pieces during or after each test. Annex Pthe belting shall be self-extinguishing, after
b) Temperature measurements ofthe surface of the propane flame has been removed, all combustion
the drum taken during each test shall not shall ceaseandaminimum of250 mm long full width
exceed 325”C. portion on each test piece shall remain undamaged at
the completion of the test.
7.6.2 Spirit Burner Flame Test
The belting shall betested bythe method described in 7.7 Tracking
Annex M. When the belting is tested in accordance
When running on correctly aligned customer
with Annex M, the average duration of the visible
conveyor equipment and after due efforts have been
flame shall not exceed 3sandthe average duration of
made to align the belting centrally onthe equipment,
the visible afterglow shall not exceed 10 s, for both
the belting shall not move sideways at any point on
longitudinal and transverse direction. The duration
the equipment by more than the values as given in
of the visible flame of any test piece shall not exceed
Table 5.
10s and the duration of the visible afterglow of any
test piece shall not exceed 15s. Table 5Tracking Values
7.6.3 The High Energv Propane Burner Tests Size (Width inmm) Values
(1) (2)
Steel cord belts shall be tested by the high energy
UPto800 Not morethan*40 mm
propane burner testmethod given inAnnexNforbelts
Above 800 upto I 600 Not more than+ 5percent 01’
of 1600 kN/m width and above. thebelting width
Above 1600 Not more than*80 mm
7.6.3.1 Acceptance criteria
7.8 Dynamic Cord Pull-Out Fatigue Resistance
When tested in accordance with the method given in
Annex N the belt shall meet one of the following When tested in accordance with the method given in
requirements in each test run : Annex Q, using a cyclic load range between 3.6 and
a) The length of belting remain i ng undamaged 36 percent of the nominal static pull out for a given
cord diameter, there shall be no evidence of cord pull
over itsfull width (N-8) shallbe greater than
2250 mm. out after completion of 10000 cycles.
I b) The maximum average temperature rise
8 MARKING
(N-9) shall not exceed 90”C, the length of
belting consumed (N-1O) shall not exceed 8.1 Belting shall be permanently marked using
2000 mm andthelengthofbelting remaining characters 20 to 50mm high. Each group of marking
undamaged over its full width (N-8) shall shall be parallel to the belt edge and shall include the
exceed 250 mm.
following information:
c) The maximum average temperature rise
a) Designation of the belting (Table 2);
1 (N-9) shall not exceed 80”C, the length of
belting consumed (N-1O)shall not exceed b) Grade of the belting in accordance with the
2250 mm andthe lengthofbelting remaining approval number of the statutory authority,
undamaged over its full width (N-8) shall where applicable;
exceed 250 mm. c) Thickness of the top cover followed by the
Ifnone ofthe above acceptance criteria havebeenmet thickness of the bottom cover expressed in
thebelt sample bereported ashaving failedtocomply mm (see 3.3.2);
with the requirement ofthe specification. Inthe event d) Theapproval number ofregulatory authority,
I of test run being terminated prematurely (N-7.2) the where applicable to the grade of belting;

5